hydrostar 4900.pdf

SURVEY ECHOSOUNDER

HydroStar 4900

TECHNICAL HANDBOOK

ELAC Nautik communications

SURVEY ECHOSOUNDER

HydroStar 4900

TECHNICAL HANDBOOK

Part 1 to 3

TH 44 116 8002 E

EDITION: 23.10.2003

ISSUE: 001

L-3 Communications ELAC Nautik GmbH

Neufeldtstrasse, 24118 Kiel, Germany

Telephone: +49 431 883 0

Telefax: +49 431 883 496

ELAC Nautik communications

Software - Version L 2.8

The reproduction, distribution and utilisation of this document as well as the communication of

this contents to others without explicit authorisation is prohibited. Offenders will be held liable

for the payment of damages. All rights reserved in the event of the grant of a patent, utility mo-

del or design.

© L-3 Communications ELAC Nautik GmbH, Kiel 2003

CAUTION

When assembly is switched on and

transducer are activated

NO DIVER

is permitted under water

PREFACEThe Technical Handbook for the Survey Echosunder System

HydroStar 4900

Published by, L-3 Communications ELAC Nautik GmbH

Neufeldtstraße

24118 Kiel

Federal Republic of Germany

contains thje following parts:

PART 1: DESCRIPTION

PART 2: OPERATING INSTRUCTIONS

PART 3: MAINTENANCE AND ONBOARD SERVICE

and is available under the number 44 116 8002 E from L-3 Communications ELAC Nautik GmbH.

SURVEY ECHOSOUNDER HydroStar 4900

TH 44 116 8002 E Edition: 23.10.2003Issue: 001

PART 1

DESCRIPTION


TH 44 116 8002 E 1 Edition: 23.10.2003Issue: 001

LIST OF CONTENTS1 GENERAL .................................................................................................................... 4

1.1 Fundamental Safety Instructions.................................................................................. 4

1.1.1 Transducer Installation Instruction ............................................................................... 5

1.1.2 Cable Length, Cable Routing, Operating Frequency ................................................... 6

1.1.3 Transducer Cable Specification ................................................................................... 8

1.2 General Information..................................................................................................... 9

1.2.1 System Designation ..................................................................................................... 9

1.2.2 Introduction.................................................................................................................. 9

1.2.3 Operating Options and Modes ..................................................................................... 9

1.3 System Components .................................................................................................... 10

1.3.1 Test Unit ....................................................................................................................... 10

1.4 Technical Data ............................................................................................................. 11

1.4.1 Electrical Data ............................................................................................................. 11

1.4.2 Transducer LSE 140 .................................................................................................... 15

1.4.3 Transducer LSE 179 .................................................................................................... 15

1.4.4 Mechanical Data........................................................................................................... 16

1.4.5 Environmental Data...................................................................................................... 16

1.4.6 NMEA Interface for Survey Echosounder SEB 4900 .................................................. 16

1.4.7 GLL Geographic Position - Latitude/Longitude ............................................................ 17

1.4.8 Global Positioning System Fix Data ............................................................................. 17

1.4.9 VTG Course over Ground and ground speed ............................................................. 18

1.4.10 ZDA Time and Date...................................................................................................... 18

1.4.11 Output:.......................................................................................................................... 19

1.4.12 DPT Depth.................................................................................................................... 19

1.4.13 DBT Depth Below transducer....................................................................................... 20

1.4.14 ELACSDS Depth information in proprietary format ...................................................... 20

1.5 Technical Description ................................................................................................... 22

1.5.1 Mechanical design........................................................................................................ 22

1.5.2 Transmit, Receive and Control Unit SEB 4900 ............................................................ 22

1.5.4 Connection Box AK 82 ................................................................................................. 23

1.5.5 Junction Box................................................................................................................. 24

1.5.6 Transducer LSE 140 .................................................................................................... 24

1.5.7 Transducer LSE 179 .................................................................................................... 25

1.6 Echosounding Principle................................................................................................ 26



1.6.1 Sound Velocity ............................................................................................................. 26

1.6.2 Formation of Echoes by Reflection .............................................................................. 28

1.6.3 Noise Level................................................................................................................... 30

1.6.4 System Frequency and Its Effect ................................................................................ 31

1.6.5 Influences of Sea Bed Contour and Ship's Movement ................................................. 32

1.7 Function........................................................................................................................ 34

1.7.1 Special Characteristics of the Survey Echosounder HydroStar 4900 ......................... 34

1.7.2 Navigation Mode ( NAV ).............................................................................................. 34

1.7.3 WATER DEPTH- Mode (DBK) ..................................................................................... 35

1.7.4 WATER DEPTH- Mode ( DBS) ................................................................................... 36

1.8 Method of Operation..................................................................................................... 38

1.8.1 Transmitter .................................................................................................................. 38

1.8.2 Depth Computer .......................................................................................................... 38

1.8.3 Control Computer ......................................................................................................... 39



LIST OF FIGURES Figure 1-1 Transducer Connection.......................................................................................... 8

Figure 1-2 System Overview................................................................................................... 10

Figure 1-3 Transmit, Receive and Control Unit SEB 4900....................................................... 22

Figure 1-4 Connection Box AK 54........................................................................................... 23

Figure 1-5 Connection Box AK 82........................................................................................... 23

Figure 1-6 Junction Box .......................................................................................................... 24

Figure 1-7 Transducer LSE 140.............................................................................................. 24

Figure 1-8 Transducer LSE 179.............................................................................................. 25

Figure 1-9 Sound Velocity Diagram ......................................................................................... 27

Figure 1-10 Double Echoes..................................................................................................... 29

Figure 1-11 Double Echo - Presentation ................................................................................. 30

Figure 1-12 Flat Sea Bed ........................................................................................................ 32

Figure 1-13 Sloping Sea Bed .................................................................................................. 33

Figure 1-14 Undulating Sea Bed............................................................................................. 33

Figure 1-15 Presentation NAV - Mode .................................................................................... 35

Figure 1-16 Presentation of Water Depth ( DBK )................................................................... 36

Figure 1-17 Presentation of Water Depth ( DBS )................................................................... 37

Figure 1-18 Block Diagram HydroStar 4900 ........................................................................... 39



1 GENERAL

1.1 Fundamental Safety InstructionsGeneral remark to HydroStar 4900

Even with a carefully selected transducer position and proper installation, the function of hydroacou-

stic equipment can be impaired by turbulence, acoustic noise or aerated water.

As main causes, the following can be stated:

- Propeller(s) running reversed;

- Thruster(s) in operation, especially at low speed ahead;

- Engine noise, transferred to the transducer either by the hull structure or through the water, the

latter especially as bottom- reflection in shallow water.

- Losing sonar contact with the water at extremely bad weather, as a result of violent pitching.

- Hot water discharges from power plants;

- Rising cold water in several sea areas.

The HydroStar 4900 has been built in accordance with state of the art standards and recognised

safety regulations. Nevertheless, it may constitute a risk to life or limb of the user and or third parties,

or cause damage to the vessel and or other material property if the following rules are not complied

with.

The HydroStar 4900 must only be used in a technically flawless condition in accordance with it's de-

signated use and the instructions contained within this Technical Handbook and only by safety

conscious persons who are fully aware of the risks involved in operating such a system.

The HydroStar 4900 is designed as a navigational and survey echosounder. Using the system for

purposes other than this is considered contrary to it's designated use. The manufacturer can not be

held responsible for any damage resulting from such misuse. The risk of such misuse lies entirely

with the user.

Personnel entrusted with operating the system must have read the Technical Handbook, in particular

the section on safety measures before and during operation. Reading these instructions after starting

the system is too late. This applies especially to persons who only work with the system occasionally,

e.g. during setting up or maintenance.

Always observe the maintenance/inspection intervals laid down in this Technical Handbook.

Use only spare parts authorised by the manufacturer and never replace defective fuses by those of

any other rating than specified.

Switch the system OFF immediately if trouble occurs with the electrical system.

Work on the system must only be carried out by a qualified technician or a specially trained person

working under the supervision of such a technician. Electrical engineering regulations must be ob-

served at all times.



Observe all safety instructions and warnings for operating and maintenance attached to the system.

Ensure that such safety instructions and warnings are always complete, visible and perfectly legible.

Never make any modifications, additions or conversions to the system without the manufacturers full

approval.

If the system is shut down for maintenance or repair, it must be secured against inadvertent switching

ON by isolating the system from the mains power supply and attaching a sign to the front plate of the

display and control unit stating that the unit must not be switched ON because maintenance or repair

work is being carried out.

Always check tighten any screwed connections, e.g. plugs, sockets and terminals, which may have

been loosened during maintenance or repair work.

Always dispose of replaced parts in accordance with local environmental regulations.

Check the system regularly for defective cables, connections etc.

Alterations within the SERVICES menu must only be made by trained persons. Altering setting within

this menu may lead to incorrect depth readings which in turn may lead to loss of life or limb.

Survey Echosounding Systems and remote indicators which detect and display the water depth from

a single momentary value per transmission pulse, e.g. digital and pointer displays, can display false

readings over a period of time. This is primarily valid in shallow water areas. For this reason, water

depths displayed in this manner must be compared with the graphic presentation at such intervals as

to guarantee the ship's safety.

1.1.1 Transducer Installation Instruction

1.1.1.1 Transducer LocatingThe performance of an echosounder is limited by the acoustical propagation of sound in water.

Mainly this is influenced by the transducer mounting place, the operational frequency and the

transducer efficiency.

The transducer mounting place is to select in such a way, that the transducer surface is free of air

bubbles and turbulence. Air bubbles and turbulence will reflect the sound energy so that no echoes

from the bottom will return.

That's why transducers in general have to be installed in ship's bow.

If the ship has a bow thruster, the transducer has to be mounted ahead of it. Otherwise the

turbulence caused by the thruster hole will inhibit echosounding operation.

While the bow thruster is operating, no echosounding is possible because of the propeller

rotation. On ships with bulbs the transducer must be mounted as far ahead as possible.



Transducers mounted in ship's aft normally are limited in function during travelling, because

this area is very noisy. Due to engine noise, propeller rotation and air bubbles, the transdu-

cers are only efficient during low speed travelling.

An indication for that is the disappearing of echoes, digital reading will indicate surface

reverberation ( 1-1.5 m ) or "?".

While sailing only the bow transducer should be used.

1.1.2 Cable Length, Cable Routing, Operating FrequencyBoth the operating frequency and the length of cable between the echosounder and the

transducer influence the performance of echosounding.

General rules are:

At lower frequencies the influence of air bubbles and turbulence decreases, increased depth measu-

rements are possible, energy loss at longer cable length is minimised.

Higher frequencies are less sensitive against radiated water noise caused by the ships engine and

propeller rotation.

The transducer cable length is limited by the working frequency, as shown in the table.

TransducerType Frequency Electrical

PowerMaximum Cable

LengthMaximum

Waterdepth

LSE 179 12 kHz 2000 W 600 m (2x1,5mm2) 10000 m

LSE 131 30 kHz 1000 Watt 600 m (2x1,5mm2) 2200 m



LSE 133 50 kHz 450 W 600 m (2x1,5mm2) 1100 m




LSE 135/ LSE 140 200 kHz 250 W 150 m (2x1,5mm2) 250 m



Critical point in cabling is the correct handling of the cable screens, especially for the transducer ca-

ble.

The cable screens have to be grounded only at one point: at the echosounder.

In all connection boxes the screens are slide and not connected to ground.

Dismantling has to be as short as possible.

The transducer cable should be fed through a steel pipe, directly welded on the transducer

housing, over the waterline (CWL) to the first junction box. At the end of the pipe a normal

cable gland should be set.

This way of transducer installation allows to replace the transducer without dry-docking, for no water

pressure is at the pipe's end, which is a great advantage.

Most classification organisation demand this installation type, due to higher ship's safety and it is the

actual standard installation.

If the first junction box is placed exceptional below the waterline, the full water pressure is at the cable

gland and transducers only can be replaced by dry-docking the ship.

From the first connection box to the echosounder three kinds of cable laying are mandatory

recommended:

- the cable is laid in a steel pipe

- a double-screened cable is used as transducer cable, the inner screen is one-side

connected to the echosounder's ground, the outer screen is both-side connected to the

ship's ground. (strongly recommended)

- the transducer cable has to be laid separately from other cables in a distance of

minimum 0.5 m.

Most important is not to lay single shielded cable in the vicinity of other cable.

NOTE: In any case shielded cable has to be used over the whole distance from the

transducer to the echosounder. All connection boxes must be metallic.



Figure 1-1 Transducer Connection

1.1.3 Transducer Cable SpecificationThe cable from the transducer connection box to the echosounder must be approved marine

cable according DIN 89158 or similar, like MGCG 2x1.5.

At least the requirement of a resistance <13 Ù/ km and a capacity of < 150 nF/ km must be

fulfilled.

For cable length longer than mentioned in the table the electrical power of the echosounder has to

be increased according to manufacturer's release.



1.2 General Information

1.2.1 System DesignationThe system described with in this Technical Handbook (TH) carries the designation:

SURVEY ECHOSOUNDER

HydroStar 4900

1.2.2 IntroductionThe modular ELAC Survey Echosounder HydroStar 4900 is the new generation deep sea echosoun-

der, capable of measuring up to 10.000 m water depth, a state-of-the-art tool for precise and reliable

survey tasks. The unit is available as stand-alone system or can be integrated in a 19''-rack, also al-

lowing integration into already existing navigation- or survey systems.

The HydroStar 4900 complies with IHO accuracy regulations for survey echosounders.

1.2.3 Operating Options and ModesThe Survey Echosounder HydroStar 4900 operates as a vertical echo-sounder in accordance with

the Impulse - Echo measurement principle.

The system is equipped with two LF transducer for vertical echo-sounding.

The main functions of the system are:

Presentation of the sea bed echo on a colour display, with simultaneous depth indication as a digital

value.

Enlarged presentation of the digital value on the display.

Built-in Test Equipment (BITE)

OffLine -Test

The display presentation can be printed out at any time using a printer.

The depth information can also be displayed on one display slave Display DAZ 25.

The conversion of transmission and reception signals from electrical to acoustic and acoustic to elec-

trical signals is carried out by the transducer.



1.3 System ComponentsThe Survey Echosounder HydroStar 4900 comprises the following components:

1 Transmit, Receive and Control Unit SEB 4900

2 Connection Box AK 82

3 Connection Box AK 54

4 Distribution Box

5 Transducer LSE 140

6 Transducer LSE 179

1.3.1 Test Unit7 EDI- DSTS- 4 Echo Simulator

8 Test Adapter Set

Figure 1-2 System Overview

Transmit, Receive

and

Control Unit

SEB 4900

Connection

Box

AK 54

Connection

Box AK82

LSE

179LSE

140

Conn. Box



1.4 Technical Data

1.4.1 Electrical DataPower supply : 88 to 264 VAC, 47 to 440 Hz

or 160 to 320 VDC

Power consumption : < 200 VA

System frequency : 12 kHz Low Frequency

: 200 kHz Standard frequency

Transmission power at 70 Ohm and 150 Ohm

* with 150 Ohm

Pulse lengths / ms

* only with LSE 179

Frequency [kHz] High power [W] Medium power [W] Low power [W]

12 2000* 46 1

2000 400 16 1

Range 12 kHz 200 kHz

m fms ft ms ms

0-10 0-6 0-30 --- 0,1

0-25 0-15 0-75 0,5 0,15

0-50 0-30 0-150 0,5 0,15

0-100 0-60 0-300 0,5 0,5

0-250 0-150 0-750 1,0 1,0

0-500 0-300 0-1500 1,0 10

0-1000 0-600 0-3000 10,0 ---

0-3000 0-1800 0-10000 20,0 ---

0-6000 0-3600 0-20000 20,0 ---

0-10000 0-6000 0-30000 100,0* ---



Soundings 12 kHz

Measurement Range

Soundings 200 kHz

Measurement Range

Pulse keying It is possible to trigger periodic.

m fms ft Sounding / min Resolution / m

I = 0-10 0 -6 0 -30 --- ---

II = 0 -25 0 -15 0 -75 240 0,01

III = 0 -50 0 -30 0 -150 240 0,1

IV = 0-100 0 -60 0 -300 200 0,1

V = 0 - 250 0 -150 0 -750 110 0,1

VI = 0 - 500 0 -300 0 -1500 54 1,0

VII = 0 -1000 0 -600 0 -3000 28 1,0

VIII = 0 - 3000 0 -1800 0 -10000 9 1,0

IX = 0 -6000 0 -3600 0 -20000 4,5 1,0

X = 0 -10000 0 -6000 0 -30000 3 1,0

m fms ft Sounding / min Resolution / m

I = 0-10 0 -6 0 -30 240 0,01

II = 0 -25 0 -15 0 -75 240 0,01

III = 0 -50 0 -30 0 -150 240 0,1

IV = 0-100 0 -60 0 -300 200 0,1

V = 0 - 250 0 -150 0 -750 110 0,1

VI = 0 - 500 0 -300 0 -1500 54 1,0



Measurement Ranges

The smallest measurable depth in range I=0.2 m ( 200 kHz).

The smallest measurable depth in range II= 1.0 m ( 12 kHz).

The smallest measurable depth in range V=10 m ( 200 kHz).

The smallest measurable depth in range X=30 m ( 12 kHz).

For reasons of safety, the digital display indicates the correct measured value at depths of up to 20%

over the end of range

The precision of the value measured is < ± 0.5 % of the relevant measurement range.

The value in measurement ranges I and II, is indicated down to centimetres. In the measurement ran-

ges III + IV, the values are indicated down to decimetres and in the ranges V to X only in metres.

Acoustic transmission level 12 kHz : 222 dB ± 2 dB rel 1 mPa, 1m ( 2000 W)

Acoustic transmission level 200 kHz : 213 dB ± 2 dB rel 1 mPa, 1m ( 200 W)

Reception sensitivity 12 kHz : 3,9 µV eff = - 98 dB ( rel. 1Veff)

Reception sensitivity 200 kHz : 24,5 µV eff = - 98 dB ( rel. 1Veff)

For echo detection at max. amplification ( without effective AGC / TVG)

Measurement range m m

12 kHz 200 kHz

Range I --- 0-10

Range II 0-25 0-25

Range III 0-50 0-50

Range IV 0-100 0-100

Range V 0-250 0-250

Range VI 0-500 0-500

Range VII 0-1000 ---

Range VIII 0-3000 ---

Range IX 0-6000 ---

Range X 0-10000 ---



Amplification control : Automatic, program controlled TVG and AGC through

processors in 128 steps of 1,25 dB, manual control is

possible, Manual control is in 160 steps, an alteration

of 1.0 dB per step is made. The system converts the

steps automatically to 1.25 dB.

Sound velocity (manual) : Can be set between 1400 and 1650 m/s in steps of

1 m/s. In the NAV- Mode, the sound velocity is fixed on

1500 m/s.

Sound velocity (Auto / optional) : Automatic control within a range of 1400 to 1650 m/s

at a precision of ± 0.1 m/s.

Transducer/Kiel compensation : Setting between 0 to 1999 cm

setting in steps of 1 cm possible.

Threshold : Adjustable in steps 0 to 10

Digital display : Depth indication: 4 digit

: Sound Velocity: 5 digit

Display Unit SEB 4900 : Display: 640 x 480 pixel

: Colour coding : 256 colours

: Brightness: dimmable in 32 steps.

Alarm function : Adjustable, rising and falling, in steps of 1 m.

: Visual alarm, depth display background turns red.

: Acoustic alarm, triggered automatically, can be swit-

ched OFF.



1.4.1.1 InterfacesAnalogue interfaces : Transducer

: LOG - input, analogue DC voltage,

0 to ± 10 VDC.

Digital interfaces : RS 422 for the digital slave display DAZ 25 with power

supply for max. 2 displays.

: Blanking signal for other systems, active for transmis-

sion trigger and echo expectancy window.

: Blanking signal from other systems, active for trans-

mission trigger.

: Transmission trigger from other systems, active for

transmission trigger.

: Trigger inhibitor from other systems, active for trans-

mission trigger inhibit.

: Standard printer, HP Laserjet (Centronics interface)

Delay for an external trigger

signal for the transmission trigger : 0 to 50 ms

1.4.1.2 MTBF / MTTRMTBF : > 6000 hours

MTTR : < 30 min. excluding the transducer

1.4.2 Transducer LSE 140Resonant frequency : 200 kHz

Transmission power : 250 W

Impedance : 70 Ohm

Directional characteristic : 10° total

Sounding Range : 500 m

1.4.3 Transducer LSE 179Resonant frequency : 15,5 kHz

Transmission power : 2000 W

Impedance : 150 Ohm

Directional characteristic : 12° total

Sounding Range : 10000 m



1.4.4 Mechanical Data

* without housing and shock- mounts

1.4.5 Environmental DataTemperature SEB 4900 : Operation : - 7 °C to + 55 °C

: Storage : -35 °C to +70 °C

Transducer LSE 140 : Operation : - 2,5 °C to +35 °C

: Storage : -35 °C to +70 °C

Transducer LSE 179 : Operation : - 2,5 °C to +35 °C

: Storage : -35 °C to +70 °C

1.4.6 NMEA Interface for Survey Echosounder SEB 4900

1.4.6.1 Technical IntroductionThis specification defines the electrical interface between external equipment and the Survey Echo-

sounder SEB 4900.

The purpose of the Survey Echosounder is to measure the depth of water below the ship's hull and

to transmit this information, in serial format, to external equipment. It is also possible to display posi-

tion data, speed and time information received from a navigation system in a serial format. The pro-

tocol based on NMEA 0183 vers. 2.2

1.4.6.2 Data TransmissionData is transmitted in serial asynchronous form in accordance with ANSI standards. The first bit is a

start bit and is followed by data bits, least significant-bit first. The following parameters are used:

Designation Height (mm) Width (mm) Depth (mm) Weight (kg)

Transmit, Receive and Control Unit SEB 4900 260 483 410 42,0*

Connection Box AK 54 183 180 96 4,0

Connection Box AK 82 300 200 115 6,0

Distribution Box 140 110 50 1,0

Transducer LSE 140 226 --- 116 5,6

Transducer LSE 179 558 --- 158 80,0



Baud rate: 4800

Data bits: 8 (LSB first)

Parity: None

Stop bits: one

1.4.6.3 Input DATAA navigation system can be connected to this interface so that the ship's co-ordinates are displayed

by the SEB 4900. The system will accept and evaluate data sentences in NMEA 0183, Version 2.20

or higher, GLL, GGA, ZDA and VTG formats, as follows:

1.4.7 GLL Geographic Position - Latitude/LongitudeLatitude and Longitude of vessel position, time of position fix and status.

Example:

Data are being received from a Global Positioning System (GP)

Latitude = 54°20.549'N

Longitude = 10°07.192'E

UTC = 20:15:33.25

Checksum (only example)

$GPGLL,5420.549,N,01007.192,E,201533.25,A*02<CR><LF>

The Survey Echosounder shows on the display the actual Longitude and Latitude. Time and date can

be synchronised by actual data.

1.4.8 Global Positioning System Fix DataTime, position and fixed related data for a GPS receiver.

$GPGGA,hhmmss.ss,llll.ll,a1,yyyyy.yy,a2,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx*hh<CR><LF>

UTC of position = hhmmss.ss

$--GLL IIII.II,a yyyyy.yy,a hhmmss.ss A hh, , , , * <CR><LF>

ChecksumStatus : A =Data ValidUTC at this positionLongitude, E/WLatitude, N/STalker Identification



Latitude = llll.ll, N/S: a1

Longitude = yyyyy.yy, E/W: a2

Checksum =hh

The other information are not used by SEB 4900.

Example:

UTC of position = 12:04:34

Latitude = 54°23.01'

Longitude = 10°12.56'

$GPGGA,120434.00,5423.01,N,001012.56,E,..........*EA<CR><LF>

The Survey Echosounder shows on the display the actual Longitude and Latitude. Time and date can

be synchronised by actual data.

1.4.9 VTG Course over Ground and ground speedThe actual course and speed relative to ground.

Example:

True Course = 234.1°

Magnetic Course = 256.7°

Speed = 22.2 km/h, 12.0 knots,

Speed =12.0 knots,


$GPVTG,234.1,T,256.7,M,12.0,N,22.2,K*A1<CR><LF>

The Survey Echosounder shows on the display the actual speed in knots. Course information is not

used by Survey Echosounder.

1.4.10 ZDA Time and Date

$--VTG,x.x,T,x.x,M,x.x,N,x.x,K*hh<CR><LF>Checksum

Speed, km/h

Speed, knots

Course, degrees Magnetic

Course, degree TRUE



UTC, day, month, year and local time zone.

Example:

Time and date o fSurvey Echosounder can be synchronised by actual data.

1.4.11 Output:After each sounding or in a fix rate of 2/s (Factory set-up) the SEB 4900 transmits depth information

to the interface in NMEA, Version 3.0 format. The DPT (Depth), DBT (Depth Below Transducer) and

ELA sentences are as follows.

Only one information will be transmitted. Which of the available information are transmitted must be

specified by the customer.

1.4.12 DPT DepthWater depth relative to the transducer and offset of the measuring transducer.

$SDDPT,x.x,-t.t*hh<CR><LF>

Depth in meter = x.x

Trim in meter = -t.t (distance transducer-keel)

Checksum = hh

Example:

Depth in meter = 337.0 m

Trim in meter = -1.5 m


$--ZDA hhmmss.ss xx,xx,xxxx xx,xx hh, , , * <CR><LF>

ChecksumDifference between UTC andGMTDay,Month,YearUTCTalker Identification

$ZAZDA 184533.20 20,12,1995 12,15 62, , , * <CR><LF>

ChecksumDifference 12 hrs 15 minsDate 20th Dec 1995UTC=18:45:33.20 sData are originating froman atomic clock



$SDDPT,337.0,-1.5*4D<CR><LF>

1.4.13 DBT Depth Below transducerWater depth referenced to the transducer

Example:

1.4.14 ELACSDS Depth information in proprietary formatA NMEA proprietary sentence ELAC is available to allow the transfer of dual channel depth informa-

tion, including transducer mounting position.

ELA: Manufacture's Mnemonic Code

C: "C" as completion to ELA

$SDDBT x.x,f x.x,M x.x,F hh, , , * <CR><LF>

ChecksumDepth in fathomsDepth in metresDepth in feet

$SDDBT 0012.1,f 0003.7,M 0002.0,F 32, , , * <CR><LF>

ChecksumDepth = 2 fathomsDepth = 3.7 metresDepth = 12.1 feet

$ CSDS, , , , , , * <CR><LF>P k x.x d.d -t.t m g hhELA

ChecksumDepth qualitySelected depth modeDistande transducer-keelin metres (TRIM)Distance transducer-surfacein metres (DRAFT)Depth in metresTransducer locationManufacture´s mnemonic codeP:Propriatary sentence identifier



SDS: Sounder Depth Single

k: Transducer Location/Active Transducer

1 = Depth from WD1, 2 = Depth from WD2

m: K=DBK (Depth below Keel),

S=DBS (Depth below Surface)

T=DBT (Depth below Transducer)

SEB 4900 transmits always Depth below Keel.

q: Quality of digital depth reading:

0=no depth information available (data not valid)

1=no depth information available, poor quality

2=depth information available, high reliability

SEB 4900 transmits always high reliability. Only reliable depth data are transmitted.

Example:

Location = Depth from Transducer WD1,

Depth = 337.0 m

DRAFT = transducer 3.4 m below surface

TRIM = transducer 1.5 m above keel

K = Depth below keel

Quality = high reliability of depth information


$PELACSDS,1,0337.0,3.4,-1.5,K,2*3F<CR><LF>



1.5 Technical Description

1.5.1 Mechanical designThe complete SURVEY ECHOSOUNDER is made on non-magnetic material. The SEB 4900 can

also be installed in a rack.

1.5.2 Transmit, Receive and Control Unit SEB 4900The enclosure (Figure 1-3) houses the 19" PCB rack with the electronic units making it suitable to be

operated as a "stand-alone" unit. The material is sand-cast aluminium. Shock mountings are availa-

ble for military use. The electrical connections are realised in the form of multi-pole Cannon connec-

tors.

The front plate is of semi-finished aluminium It is almost completely covered by a membrane. The

membrane contains the keyboard and the display.

Figure 1-3 Transmit, Receive and Control Unit SEB 4900

1.5.3 Connection Box AK 54The Connection Box AK 54 (Figure 1-4) is made of salt-water resistant, cast aluminium.

It serves as a link between the wiring motion sensor and the HydroStar 4900 .



Figure 1-4 Connection Box AK 54

1.5.4 Connection Box AK 82The Connection Box AK 82 (Figure 1-5) is made of salt-water resistant, cast aluminium.

It serves as a link between the ship´s wiring and transducer cable .

Figure 1-5 Connection Box AK 82



1.5.5 Junction Box The Junction Box (Figure 1-6) is made of red bronze and is fitted with cable entry glands. It serves

as a link between the ship's wiring and the transducer cable.

Figure 1-6 Junction Box

1.5.6 Transducer LSE 140The Transducer LSE 140 (Figure 1-7) is fitted with seven ceramic elements. A built-in repeater coil

compensates the capacitance of the ceramic element and transforms the resistance to 70 Ohms. The

ceramic element and the repeater coil are potted in a synthetic materiel. The unscreened transducer

cable is watertight along its length. The transducer is protected against abrasion.

Figure 1-7 Transducer LSE 140



1.5.7 Transducer LSE 179The transducer of 37 ceramic elements excited in their thickness resonance. The resonant frequency

is approx. 15.5 kHz. The transducer can also be operated at 12 kHz or 20 kHz, but them it has to be

individually compensated, since the reactance is getting very large compared to the effective resi-

stance.

The transducer is excellently suitable for displaying of echo intensities and sediment displays and for

measurement of large water depths.

Figure 1-8 Transducer LSE 179



1.6 Echosounding Principle

1.6.1 Sound VelocityThe speed, at which sound is propagated, depends upon the medium, through which it must travel.

Here some examples:

In air approx. 330 m/s

In water approx. 1,500 m/s

In steel approx. 5,100 m/s

The values above are average values.

The sound velocity in a uniform (homogenous) media is constant. The absolute value is dependent

upon various factors. With propagation in water, deviations in standard values occur, particularly due

to temperature changes and degree of salinity and also to a certain extent, by the pressure. An

increase in salinity and/or temperature will cause the sound velocity to increase. The sound velocity

values, for given circumstances, can be taken from Figure 1-9. The largest deviations from the stan-

dard value of 1500 m/s amount to approx. ± 4%. For this reason, corrective action must be taken in

order to gain precise measurements. With the HydroStar 4900 Survey Echosounder System, correc-

tion values for differing water conditions can be directly entered via a menu. The actual sound velocity

can also be automatically fed into the system, providing that a corresponding sound velocity measu-

ring system is available.



Figure 1-9 Sound Velocity Diagram

Soundvelocity versus Temperature and Salinity at 0 bar Pressure (Del Grosso)Schallgeschwindigkeit in Abhängigkeit von Temperatur und Salzgehalt bei 0 bar Druck

1400

1410

1420

1430

1440

1450

1460

1470

1480

1490

1500

1510

1520

1530

1540

1550

1560

1570

Temperature /Temperatur [°C]

Soun

dvel

ocity

/ Sc

hallg

esch

win

digk

eit [

m/s

]

0 ppt

10 ppt

15 ppt

20 ppt

25 ppt

30 ppt

35 ppt

40 ppt

0 ppt 1402 1425 1446 1465 1481 1496 1508 1518

10 ppt 1415 1438 1459 1477 1493 1507 1519 1529

15 ppt 1422 1445 1465 1483 1499 1512 1524 1534

20 ppt 1429 1451 1471 1489 1504 1518 1530 1540

25 ppt 1436 1458 1477 1495 1510 1523 1535 1545

30 ppt 1442 1464 1484 1501 1516 1529 1540 1550

35 ppt 1449 1471 1490 1507 1521 1534 1546 1555

40 ppt 1456 1477 1496 1512 1527 1540 1551 1560

0 5 10 15 20 25 30 35



1.6.2 Formation of Echoes by ReflectionEach time the propagation conditions in the medium alter, a larger or smaller proportion of the sound

is reflected by the edges of the medium and is returned as an echo. The difference in the propagation

characteristics has a fundamental influence on the strength of the echo. Hard objects (stone or steel)

return stronger echoes than soft objects, e.g. mud. The shape of the surface of the object, from which

the echo is reflected, also has a strong influence on the strength of the echo.

Optical laws apply to the reflective surfaces ( angle of in incidence equal to angle of emergence, see

( Figure 1-10 ). Particularly strong reflections (almost 100% reflection) occurs where the water meets

air, which can also be in the form of bubbles. When travelling through wake water, which contains a

high proportion of air bubbles, the bottom echo can be lost completely or strong interference may ap-

pear on the graphic display, caused by the air bubbles close to the surface of the water.

Multiple echoes can also occur. If the echosounder is sufficiently sensitive, the returning echo can be

reflected by the surface of the water, return to the sea bed and back to the ship, where it will be re-

ceived and displayed as a double echo. In some cases, triple and even quadruple echoes have been

observed.

With larger ships, in particular flat-bottomed ships, the surface reflection not only results from the sur-

face of the water but also from the bottom of the ship's hull. This then results in a double bottom struc-

ture in the double echo. The upper contour is from the reflection caused by the ship's hull. The

distance is exactly twice the water depth below the keel, as the transducer is normally installed there.

The next, slightly deeper contour is caused by the beam reflected by the surface of the water. This

contour is usually slightly stronger, as the reflection is stronger. The difference between the two sea

bed contours corresponds to the draft of the ship.

1.6.2.1 Multiple Echo Principle of EchosoundingThe sound beam is almost completely reflected where the two media, air and water, meet. When a

sounding pulse returns from the sea bed as an echo, only a very small portion hits the transducer as

a useful echo.

A far larger portion hits the ship's hull surrounding the transducer and an even larger portion hits the

surface of the water around the ship, from where it is reflected back to the sea bed.. This is in turn

reflected from the sea bed, causing the same sounding pulse to be received by the transducer a se-

cond time. If it is still strong enough, after having covered twice the distance, it will be displayed below

the first sea bed echo, at twice the depth, as a so called "double" or "1st multiple" echo. That portion

of the sounding pulse, which was reflected by the surface of the water, will appear on the display at

twice the depth. With larger vessels and relatively shallow water, that portion of the sounding pulse,

which was reflected by the ship's hull, will also be displayed. Due to the fact, that the ship's hull is

smaller than and does not reflect as well as the surface of the water, the double echo from the ship's



hull is correspondingly weaker.

Figure 1-10 Double Echoes



Figure 1-11 Double Echo - Presentation

The double echo can be seen most clearly on the SEB 4900 display, when the threshold is set

to 0, see Figure 1-11L.

1.6.3 Noise LevelDue to attenuation losses and the geometric propagation, the echo signals become ever weaker with

increasing depth and are finally lost in the ambient noise. In order to become a clear presentation,

the echo signals received must be stronger than these noise signals. The so-called "useful signal /

noise ratio" generally limits the range of an echosounder. For this reason, the noise level at the trans-

ducer's place of installation is an important factor.

The noise level on board a moving ship is generally very high. The main sources of noise are natu-

rally the ship's engines and the propeller but auxiliary machinery in the vicinity of the transducer and

the current of water over the ship's hull are also contributory factors. There is also water borne noise,

like waves, reverberation etc. The spectrum of such noise ranges between a few Hertz and several

hundred Kilohertz. There are generally no frequencies, which are free of noise. Echoes received from

a great depth are extremely weak, the reception power at the transducer lies in the region of

1 x 10-10 ( 0.0000000001 W ). When one compares this to the many thousand watts of power, which

must be produced on board, to propel the ship, the noise problem becomes obvious. The most effec-



tive means of eliminating noise in an echosounder system, is to tune all parts of the system to preci-

sely the same frequency (resonance). This applies to the transmitter, the transducer and the

reception amplifier. The bandwidth must also be kept as narrow as possible, in order to prevent the

reception of noise, outside the operating range of the echosounder.

1.6.4 System Frequency and Its EffectAs previously mentioned, attenuation losses increase with increases in frequency. The range of an

echosounder is thus greater at a lower frequency. This however only has a practical meaning for

great distances of over 1000 m and does not therefore apply to normal echosounders. For this reason

however sonar systems operate at low frequencies to achieve increased range. Low frequencies

have several disadvantages for echosounder systems. This applies to the transducer, which, in order

to achieve a narrow beam, has to be far larger for a low frequency.

The other disadvantage with a low frequency system lies in the resolution, which deteriorates at low

frequency. This is due to the pulse length. The transducer should operate at resonance, i.e. its natural

mechanical frequency is matched to the electrical system frequency. In order that resonance can de-

velop, a pulse must contain a whole series of oscillations. The transducer represents a considerable

mechanical mass and must first oscillate. This naturally takes longer for a large mass (transducer of

low frequency) than for a small, high-frequency transducer.

The same applies for the end of the pulse, where the transducer oscillation, caused by the electrical

transmission pulse, decays With a low system frequency, the transmission pulses must be consi-

derably longer.

The pulse length determines the resolution of the echosounder. The term "resolution", is understood

to be the smallest distance apart at which a system can display two objects as separate objects. Re-

solution can not be performed within a pulse. The distance between the two objects must hence be

larger than the pulse length plus the pulse decay process.

In order to make the best possible use of the resonance effect of the transducer, approx. 30 electrical

transmission pulse oscillations are required. This corresponds to a pulse length of 0.7 ms at 50 kHz,

whereas the pulse length is 3.5 ms at 10 kHz. The resolution at lower frequencies is thus 5 times

worse . If the transmission pulse is less than 30 oscillations, the resonance effect is partially lost. This

is generally permissible in shallow water, as ,due to the high transmission power, the "useful signal

/ noise ratio" is better than in deep water. TheSurvey Echosounder HydroStar 4900 operates with

6 pulse lengths of 0.1 ms in the 10 m range (30 kHz), 0.15 ms in the 25 m and 50 m range (12 kHz),

0,5 ms in the 25 to 100 m ranges ( 30 kHz) 1.0 ms in the 100 m range ( 12 kHz), 10.0 ms in the

250 m range ( 12 kHz), 1.0 ms in the 250 and 500 m ranges ( 12 kHz), 20 ms in 500 m range

( 30 kHz), 10ms in 1000 m range, 20 ms in the 3000m and 6000m and 100 ms in the 10000 m range.

The pulse length is automatically changed, when the operating range is changed. These pulse



lengths give a resolution of approx. 30 cm in the shallow ranges and 2.0 to 20 m in the deeper ranges.

This resolution is of particular importance when sounding in shallow water.

In order to suppress noise, the bandwidth of the reception channel is kept to a minimum. This is to

prevent reception of noise, which is outside the frequency range of the system. On the other hand,

the bandwidth must be wide enough to allow the short echo pulse to be processed without hindrance.

Taking the switchable pulse length of the system into consideration, the bandwidth of the Survey

Echosounder HydroStar 4900 is always changed to suit the range selected.

Taking the required range of the system, of at least 1000 m and a sounding resolution of approx. 0.3

m, a system frequency of 200 kHz was chosen for the Survey Echosounder HydroStar 4900. At this

frequency, the sound pulses also penetrate the soft sea bed layers to a certain degree. This is so that

the sea bed structure can be displayed. This is an important factor during anchoring manoeuvres for

example. Layers in the water, due to differing temperatures or salinity of the water will also be dis-

played.

1.6.5 Influences of Sea Bed Contour and Ship's MovementFlat Sea Bed

The vertical echo is received first. The true water depth, at the ship's position, is displayed.

Figure 1-12 Flat Sea Bed



Sloping Sea Bed

The vertical echo arrives too late. The depth displayed is too shallow.

Figure 1-13 Sloping Sea Bed

Undulating Sea Bed

The vertical echo is received later. The depth displayed is also too shallow. Small troughs can be

overlooked completely.

Figure 1-14 Undulating Sea Bed



1.6.5.1 Influences of Ship's MovementDue to the motion of the ship, the narrow echosounding beam deviates from the vertical and the so-

unding indicates a greater than actual depth.

If a less concentrated beam is now used, this error can be corrected.

Unfortunately, one hundred percent justice can not be done to both requirements. A compromise is

achieved by using a moderately concentrated beam.

1.7 Function

1.7.1 Special Characteristics of the Survey Echosounder HydroStar 4900The HydroStar 4900 differs greatly in function from the way in which normal echosounders operate.

A decisive factor during development of the system was the requirement to employ the

HydroStar 4900 as standard equipment on board surface ships, to measure the depth of water under

the keel and to present this true to scale and in the correct position in one and the same echogram.

A further requirement was the presentation of the depth of water in digital form, and to permit con-

nection of additional repeater displays.The HydroStar 4900 provides outstanding performance in vir-

tually any application requiring precise, dependable depth measurement and evaluation of bottom

conditions. It fully meets the requirements of professional hydrography for bathymetry ranging from

maximum ocean depths to river and channel surveys as well as site and route surveys for offshore

construction.

1.7.2 Navigation Mode ( NAV )Nav Mode are basic compulsory settings which must be used when operating the system for naviga-

tion purpose. These are laid down by the International Maritime Organisation ( IMO ) and state that:

- After switched „ ON „ the system works on NAV- Mode

- The Sound Velocity must be set to 1500 m/s

- The unit of measurement must be metric ( metres )

- Water depth must be measured below the keel (DBK )



Figure 1-15 Presentation NAV - Mode

1.7.3 WATER DEPTH- Mode (DBK)The distance between the keel and the sea bed should be displayed as the water depth (depth below

the keel). To enable this, an LF transducer is installed in the ship's bottom but which, due to the ship's

construction, is often not on the underside of the keel. To correct this, the distance between the trans-

ducer and the underside of the keel must be taken into consideration. The measurement itself starts

naturally from the surface of the water. To display the depth of water under the keel, the distance

between the echosounder and the keel must be subtracted from the depth measured. This is carried

out automatically, if it is set during the HAT. The zero line of the recording corresponds to the trans-

ducer, under which the sea bed profile recording is presented in the echogram ( Fig. 1-16, Fig.1-17).

This causes a deviation between the depth displayed (below the keel) and the depth recorded, the

greater the transducer to keel compensation, the smaller the range selected.



Figure 1-16 Presentation of Water Depth ( DBK )

1.7.4 WATER DEPTH- Mode ( DBS)For the water depth measurement, it is also possible to measure the depth from the surface of the

water to the sea bed. A pressure sensor, which measures the depth between the surface of the water

and the keel, is required for this purpose. In the DBS mode, this difference is presented on the display

and taken into consideration for the depth indication.



Figure 1-17 Presentation of Water Depth ( DBS )



1.8 Method of OperationThe values measured for water depth and sound velocity, determined by this system, can be display-

ed simultaneously on the display and on the digital displays.

An acoustic and visual alarm facility is activated. The acoustic alarm can be switched OFF centrally

in the unit.

The electronics can be disassembled to 3 units:

- Analogue part

- Depth computer

- Control computer

and Operating / Display unit.

The Operating / Display unit is based on an industrial PC with compact PCI bus. The operating pro-

gramme is Windows NT 4.0 The PC software is sub-divided into two independent main programmes.

The console programme is responsible for the screen output to the display and for reading in operator

commands via the keyboard, whilst the other, the host programme, communicates with the depth

computer via a serial interface and is responsible for data administration with external interfaces (ex-

ternal equipment, sensor inputs).

A flash drive is used in this computer system in place of the hard disk.

The keyboard is a matrix keyboard. Signals from this are processed for the PC by means of a con-

verter PCB. As the console lighting must also be dimmable, a pulse width control system is used for

the keyboard and display lighting.

The receiver is designed as a super heterodyne receiver. The various operating frequencies

(12 kHz to 1 MHz) are selected by switching the mixing frequency over. An AC voltage mixed to an

intermediate frequency (455 kHz) is available at the output and not a rectified signal as is normally

the case. Digitalisation takes place before the rectifier, in order to allow flexibly configurable filter

structures by using fast processors. This measure reduces the sensitivity to interference (noise) du-

ring depth sounding.

1.8.1 TransmitterThe transmitter is realised in the form of a tried and tested FET bridge circuit. This has particularly

low loss characteristics.

1.8.2 Depth ComputerThe depth computer comprises a 32 bit floating decimal point DSP. Transmission triggering is follo-

wed by a time-dependent control voltage for the TVG. The results of a sounding are available almost

immediately after completion of the sounding. The complete read-in buffer of the rectified echo is

compressed to 400, 8 bit amplitude values for graphic presentation on the display. The interface to



the PC is served asynchronous to this. During the initialisation phase, information as to the respective

equipment configuration are fed in here. During operation, operating parameter changes (pulse

width, pulse power, alarm relay switching, measurement range etc.) are communicated. At the output

side, the 400 echo amplitudes and the values measured by the sensors must be transfered.

1.8.3 Control ComputerThe control computer handles all control functions, e.g. transmission trigger resolution, administrati-

on of all ext. interfaces, evaluation of keyboard inputs and the output to the display.

Figure 1-18 Block Diagram HydroStar 4900

Hyd

roSt

ar 4

900

CR

T

STE

RS

232

Prin

ter

RS 422DAZ 25

Optional

Com

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PART 2

OPERATING INSTRUCTIONS



LIST OF CONTENTS2 OPERATING INSTRUCTIONS .................................................................................... 44

2.1 Safety Regulations for Handling Electrical Equipment ................................................. 44

2.2 Checks After Installation/Start-Up ................................................................................ 44

2.2.1 Setting the Transducer - Correction ES WD1 and WD2 .............................................. 44

2.2.2 Setting the Sound Velocity ........................................................................................... 44

2.2.3 Storing the Reverberation Threshold .......................................................................... 44

2.3 Initial Switch-ON and Operation .................................................................................. 45

2.3.1 ON / OFF Key and Special Function Keys .................................................................. 46

2.4 Display Presentation .................................................................................................... 50

2.4.1 Explanation of Display Presentations........................................................................... 51

2.4.3 Status Line .................................................................................................................. 56

2.5 Altering System Parameters and Settings.................................................................... 58

2.5.1 THRESHOLD, RANGE and DIM Settings.................................................................... 58

2.6 General Information Regarding the MENU HydroStar 4900 ........................................ 60

2.6.2 MENU Alarm ................................................................................................................ 65

2.6.3 MENU Sonar Parameter .............................................................................................. 70

2.6.4 Sonar Parameter MENU - Pulse Power ....................................................................... 73

2.6.5 Sonar Parameter MENU - Pulse Length ..................................................................... 76

2.6.6 Sonar Parameter MENU - " Autophase " ..................................................................... 79

2.6.7 MENU PROPERTIES................................................................................................... 86

2.6.8 MENU Data Storage..................................................................................................... 101



LIST OF FIGURES Figure 2-1 Front View of HydroStar 4900................................................................................ 45

Figure 2-2 Keyboard................................................................................................................ 46

Figure 2-3 ON/ OFF and Special Keys..................................................................................... 47

Figure 2-4 CURSOR Keys ...................................................................................................... 47

Figure 2-5 ESCAPE / ENTER Keys ........................................................................................ 48

Figure 2-6 THRESHOLD Keys................................................................................................ 48

Figure 2-7 RANGE Keys ......................................................................................................... 48

Figure 2-8 DIM keys ................................................................................................................ 49

Figure 2-9 STAND BY Indicator ............................................................................................. 49

Figure 2-10 Loudspeaker Key................................................................................................. 49

Figure 2-11 Presentations on the Display WD 2 200kHz DBK................................................ 50

Figure 2-12 Presentation on the Display WD1 12kHz DBK+ WD2 200kHz DBK.................... 51

Figure 2-13 Marker line on the Display .................................................................................... 53

Figure 2-14 Change of Range (Range Window) ..................................................................... 53

Figure 2-15 Presentation in the Display Mode: WD 2 200 kHz + WD 1 12 kHz...................... 54

Figure 2-16 Display Mode: Large Depth Display WD 2 200 kHz NAV..................................... 55

Figure 2-17 Grey Scale Presentation ( Threshold 0)............................................................... 56

Figure 2-18 Display at Switch- ON........................................................................................... 58

Figure 2-19 Main Menu ........................................................................................................... 60

Figure 2-20 Menu Display Mode „ ES, WD 1 12kHz............................................................... 61

Figure 2-21 Menu Display Mode „ ES, WD 1 12kHz + WD 2 200kHz..................................... 61

Figure 2-22 Menu Display Mode „ Large Depth Display“ ........................................................ 62

Figure 2-23 Menu Display Mode „ Large Depth Display WD1 12 kHz DBK............................ 62

Figure 2-24 Menu Display Mode „ Large Depth Display WD 1 12kHz + WD 2 200kHz.......... 63

Figure 2-25 Menu Display Mode: „ Range Marks Mode 1 „ ..................................................... 63

Figure 2-26 Menu Display Mode „ Range Marks Mode 1 „ ..................................................... 64

Figure 2-27 Menü Display Mode „ Range Marks Mode 2 „ .................................................... 65

Figure 2-28 Menu Alarm „ Alarm active“ ................................................................................. 65

Figure 2-29 Menu Alarm „ Test“ ............................................................................................. 66

Figure 2-30 Menu Alarm „ Acoustic alarm............................................................................... 67

Figure 2-31 Menu Alarm „ WD upper Limit“ ............................................................................ 68

Figure 2-32 Setting Window „ WD: Alarm upper Limit“ ........................................................... 68

Figure 2-33 Menu „WD lower limit“........................................................................................ 69

Figure 2-34 Setting Window „ WD: Alarm lower limit [ m ] ..................................................... 69



Figure 2-35 Alarm Marker and optical alarm presentation ...................................................... 70

Figure 2-36 Menu Sonar Parameter „ Pulse Sequence- Continuous“..................................... 71

Figure 2-37 Menu Sonar Parameter „ Pulse Sequence- External Trigger“ ............................. 72

Figure 2-38 Setting Window „ Trigger delay „.......................................................................... 72

Figure 2-39 Window of EXTERNAL Information ..................................................................... 72

Figure 2-40 Sonar Parameter Menu, " Pulse Power - Automatic ".......................................... 73

Figure 2-41 Sonar Parameter Menu, " Pulse Power - Increase"............................................. 74

Figure 2-42 Sonar Parameter Menu, " Pulse Power - Decrease" ........................................... 75

Figure 2-43 Information window "Pulse Power: Decrease"..................................................... 76

Figure 2-44 Sonar Parameter Menu, " Pulse Length - Automatic "......................................... 77

Figure 2-45 Sonar Parameter Menu, " Pulse Length - Increase" ............................................ 77

Figure 2-46 Information window: "Pulse Length" .................................................................... 78

Figure 2-47 Sonar Parameter Menu, " Pulse Length - Decrease" .......................................... 79

Figure 2-48 Sonar Parameter Menu, " Autophase OFF "........................................................ 80

Figure 2-49 Sonar Parameter Menu, " Autophase Automatic "............................................... 81

Figure 2-50 Display Presentation : Autophase Automatic....................................................... 81

Figure 2-51 Sonar Parameter Menu " Autophase Manual " .................................................... 82

Figure 2-52 Setting Window: " Range Start" ........................................................................... 82

Figure 2-53 Display Presentation: Auto: Manual..................................................................... 83

Figure 2-54 Sonar Parameter Menu " Blocking Depth, Manual " ............................................ 84

Figure 2-55 Blocking Depth Presentation................................................................................ 85

Figure 2-56 Setting Window : " Blocking Depth" ..................................................................... 85

Figure 2-57 Menu Properties „ User Setting - Save 1“ ............................................................ 86

Figure 2-58 Menu Properties „ User Setting - Load 1“ ............................................................ 87

Figure 2-59 Menu Properties „ Sound Velocity ....................................................................... 87

Figure 2-60 Setting Window „ Sound Velocity“........................................................................ 88

Figure 2-61 Menu Properties „ Date + Time“ .......................................................................... 88

Figure 2-62 Setting Window „ Date: Year“ .............................................................................. 89

Figure 2-63 Setting Window „ Date: Month ............................................................................ 89

Figure 2-64 Setting Window „ Date: Date................................................................................ 89

Figure 2-65 Menu Properties“ Date + Time“ ........................................................................... 90

Figure 2-66 Setting Window „ GMT- Time: Hour „................................................................... 90

Figure 2-67 Setting Window „ GMT- Time: Minute „................................................................ 90

Figure 2-68 Menu Properties - " Reverberation " .................................................................... 91

Figure 2-69 Information Window "Reverberation Measurement" ............................................ 92

Figure 2-70 Menu Properties. Reverberation "Storage Range" .............................................. 92



Figure 2-71 Menu Properties. Reverberation "Storage Manual" ............................................. 93

Figure 2-72 Setting Window: „ Reverberation ( Blocking Depth m )“ ...................................... 93

Figure 2-73 Setting Window: „ Reverberation ( Blocking Depth) Storage “ ............................ 93

Figure 2-74 Menu Properties „ Draft“ ..................................................................................... 94

Figure 2-75 Setting Window „ Draft“........................................................................................ 94

Figure 2-76 Menu Properties „ Depth Mode“........................................................................... 95

Figure 2-77 Depth Mode „ DBK“.............................................................................................. 96

Figure 2-78 Depth Mode „ DBS“.............................................................................................. 97

Figure 2-79 Properties Menu “ Meter“ ..................................................................................... 98

Figure 2-80 Standart graphic with Meter - Scale..................................................................... 98

Figure 2-81 Standart graphic with Fathoms - Scale ................................................................ 99

Figure 2-82 Standart graphic with Feet - Scale....................................................................... 100

Figure 2-83 Menu Properties „ Transducer Correction.......................................................... 100

Figure 2-84 Setting Window „ Keel correction „....................................................................... 101

Figure 2-85 Confirmation Window........................................................................................... 101

Figure 2-86 Menu „ Data Storage - Show“ ............................................................................. 102

Figure 2-87 Menu „ Data Storage - Search“............................................................................ 103

Figure 2-88 Setting Window „ Date: Year“ ............................................................................... 103

Figure 2-89 Setting Window „ Date: Month“ ........................................................................... 104

Figure 2-90 Setting Window „ Date: Day“............................................................................... 104

Figure 2-91 Setting Window „ Date: Hour“ ............................................................................. 104

Figure 2-92 Menu „ Data Storage - Clear“............................................................................... 105

Figure 2-93 Warning Message for „ Data Storage - Clear“ ..................................................... 105

Figure 2-94 Message „ Not surfficient data“ ............................................................................ 106

Figure 2-95 Menu Print............................................................................................................ 106

Figure 2-96 Menu „ Testmode - Built In Test“ ......................................................................... 107

Figure 2-97 Display Presentation of the items tested by the Built In Test............................... 108

Figure 2-98 Menu „ Testmode - Oscilloscope - Rectified Echo“.............................................. 109

Figure 2-99 Oscilloscope - Echo Signal Presentation“............................................................ 109

Figure 2-100 Menu „ Testmode- Key Gain“............................................................................. 110

Figure 2-101 Menu Testmode „Gain Manual“ ......................................................................... 111

Figure 2-102 Setting Window „ GAIN“..................................................................................... 111

Figure 2-103 Confirmation Window......................................................................................... 112

Figure 2-104 Display Offline BITE........................................................................................... 113

Figure 2-105 Menu „SW- Reset“ ............................................................................................. 113

Figure 2-106 Warning Window „ SW Reset“ ........................................................................... 114



Figure 2-107 Menu „ LCD Test“ .............................................................................................. 114

Figure 2-108 Menu „ About“ .................................................................................................... 115

Figure 2-109 Window ABOUT................................................................................................. 115



2 OPERATING INSTRUCTIONS

2.1 Safety Regulations for Handling Electrical Equipment

Personnel working on open equipment must be familiar with and adhere strictly to the safety regula-

tions pertaining to such work.

Before carrying out work inside open equipment, the supply voltage must be switched OFF.

Work must only be carried out on open equipment in the presence of a second person. This person

must have a sound knowledge of "FIRST AID IN THE EVENT OF ELECTRIC SHOCKS"

2.2 Checks After Installation/Start-Up

2.2.1 Setting the Transducer - Correction ES WD1 and WD2The transducer - correction eliminates the difference between the base of the transducer and the un-

derside of the keel for the survey echosounder display. This means, that the survey echosounder dis-

play shows the depth of water under the keel.

This difference is due to the place of installation of the transducer and must be taken from the shipy-

ard construction drawings.

The transducer correction setting is made during the HAT by the menu.

2.2.2 Setting the Sound VelocityThe actual sound velocity inherent in the area of operation can deviate from the average sound

velocity (1500 m/s), depending upon the salinity and temperature of the water. The deviation can be

as much as ± 4%.

If the actual sound velocity can not be determined, it must be set to 1500 m/s.

The range of adjustment is between 1400 m/s to 1650 m/s.

The setting is made in accordance with Chapter 2.6.7.3.

On the NAV- Mode the sound velocity change automatically to 1500 m/s.

2.2.3 Storing the Reverberation ThresholdThe transducer reverberation makes it necessary to enter a so called "REVERBERATION THES-

HOLD" into the system and store it.

The reverberation threshold prevents the display from being affected by the transducer's reverbera-

tion.

This threshold differs from ship to ship and is therefore set and stored after the system has been in-

stalled and during the SAT. It can also be set and stored at a later point in time.



In order to make this setting, the ship must have a water depth in excess 10 m under the keel and be

travelling at 2/3rds of its maximum speed.

The setting is made in accordance with Chapter 2.6.7.7.

2.3 Initial Switch-ON and Operation

The Transmit, Receive and Control Unit SEB 4900 is equipped with a keyboard, which controls echo-

sounding functions and via which menu control can be carried out. Some important functions can be

controlled directly using special keys. Other functions can be called up from a menu, which is visible

on the display. The menus are in the English language but can be altered to other languages. The

menu language can only be changed by the manufacturer. Menus are controlled using the ESCAPE,

ENTER, UP and DOWN keys. The menu is organised in several levels. The main functions are listed

in the first level. The next level can be reached by pressing the ENTER key, the previous level can

be reached by pressing the ESCAPE key. These keys are used to select the desired setting.

Figure 2-1 Front View of HydroStar 4900



Figure 2-2 Keyboard

2.3.1 ON / OFF Key and Special Function Keys

2.3.1.1 ON / OFF Key The ON / OFF and special function keys are situated in the centre of the keyboard.

The unit is switched ON by pressing the ON / OFF key. They ON / OFF key is black. The unit switches

ON with the parameters which were in use before it was last switched OFF. The following parameters

are not stored and default settings are used when the unit is switched ON.

- NAV- Mode

- Trigger mode = continuous

- Autophase = no Autophase ( OFF )

- Blocking depth = 0

- AGC is active

The unit is switched OFF by pressing the same key. The key must be held pressed for approx. 5 sec.,

after which time it switches OFF.

2.3.1.2 NAV Key Press the NAV- key to change from the normal mode to the NAV- Mode. After again pressing this

push button the system goes back in the normal mode.



2.3.1.3 STORE Key When the "STORE" key is pressed, sensor data storage is initiated, providing that sensors are con-

nected to the system. The storage procedure is terminated by pressing the key once again. "Store

OFF" or "Store ON" appears in the status line.

2.3.1.4 MARK Key When the "MARK" key is pressed, a vertical line from top to bottom appears on the display. The time

at which the key was pressed appears on the line. The line moves across the screen from right to

left. A reverse mode is also available, this can however only be set up by the manufacturer.

Figure 2-3 ON/ OFF and Special Keys

2.3.2 Operating Elements2.3.2.1 Cursor Keys

The CURSOR keys allow the operator to move the cursor within a menu and to alter

parameters. The position of the cursor can be easily recognised. The word, letter or

number marked by the cursor appears inverse (dark background, light text). Parameters

to be altered must first be "marked" by the cursor. Value settings are altered using the

cursor keys.

The keys can be used to switch directly to the mode Display Mode / ES

Figure 2-4 CURSOR Keys

CURSOR



2.3.2.2 ESCAPE / ENTER KeysThe ESCAPE key is used to exit a menu or to abort parameter alterations.

The ENTER key is used to call up menus and to confirm alterations to parameters within

a menu.

Figure 2-5 ESCAPE / ENTER Keys

2.3.2.3 TRESHOLD KeysThe THRESHOLD keys are used to alter the signal control for the display presentation.

The quality of the presentation is influenced by this. The amplification can be controlled

by these keys when they are active, see Chapter 2.6.7.5.4. The gain can also be adju-

sted manually, see Chapter 2.6.7.5.

Figure 2-6 THRESHOLD Keys

2.3.2.4 RANGE KeysThe RANGE keys are used to set the depth range of the system.

These ranges are:

Range I : 0 to 10 m, 0 to 6 fms 0 to 30 ft only 200kHz

Range II : 0 to 25 m, 0 to 15 fms 0 to 75 ft

Range III : 0 to 50 m 0 to 30 fms 0 to 150 ft

Figure 2-7RANGE Keys Range IV : 0 to 100 m 0 to 60 fms 0 to 300 ft

Range V : 0 to 250 m 0 to 150 fms 0 to 750 ft

Range VI : 0 to 500 m 0 to 300 fms 0 to 1500 ft

Range VII : 0 to 1000 m 0 to 600 fms 0 to 3000 ft only 12kHz

Range VIII : 0 to 3000 m 0 to 1800 fms 0 to 10000 ft only 12kHz

Range IX : 0 to 6000 m 0 to 3600 fms 0 to 20000 ft only 12kHz

Range X: 0 to 10000 m 0 to 6000 fms 0 to 30000 ft only 12kHz



2.3.2.5 DIM KeysThe DIM keys are used to set the display and keyboard background lighting to suit the

operator.

Figure 2-8 DIM keys

2.3.2.6 STAND BY IndicatorsThe STAND BY indicator lights up, when the supply voltage is available but the unit

is not actually switched ON.

Figure 2-9 STAND BY Indicator

2.3.2.7 Loudspeaker KeyThe key with the loudspeaker symbol crossed out is used to de-activate the alarm

function for a period of 3 minutes.

The loudspeaker key also has additional functions when making parameter settings.

Figure 2-10 Loudspeaker Key

- Alarm limits are set to 0.

- Blocking depth is set to 0.

- Trigger delay setting is set to 0.

- Draft setting is set to 0.



2.4 Display Presentation

All available information is presented on the display (Figure 2-11). The display is split into 3 areas.

- Information field

- Echograph presentation

- Status line

Figure 2-11 Presentations on the Display WD 2 200kHz DBK

Information-field

EchoRegistration

Status line Marker line Range Scale



Figure 2-12 Presentation on the Display WD1 12kHz DBK+ WD2 200kHz DBK

2.4.1 Explanation of Display Presentations

2.4.1.1 Information fieldThe operating mode in use is indicated in the information field. There are 3 indications

1. Operating mode WD1 12kHz

2. Operating mode WD 2 200kHz

3. Operating mode WD 1 12kHz + WD 2 200kHz

On the same level, it is also shown which measurement scale is in use, e.g. "m".An arrow, which can

be on a yellow or red background, appears at the left-hand side of the digital depth indication. If the

depth remains constant, the background changes to green and the arrow disappears. The colour

changes, if the depth increases or decreases. If the depth decreases, the arrow points upwards and

the background turns red. If the depth increases, the arrow points downwards and the background

turns yellow. The depth indication appears in a white box. The depth measured is displayed numeri-

cally in this field. If the operating mode WD 112 kHz + WD 2 200 kHz is in use, the display window

is split vertically into WD 2 and WD 1. The display for WD 2 is on the left-hand side, followed by WD 1

to the right. If only one channel is selected this channel, WD 1 or WD 2 fills the whole display. This

WD 2 WD 1



area also serves as a visual alarm indication, providing that the alarm circuit is switched ON via the

menu, refer to Chapter 2.6.2.1. If the max. / min. depth limits selected are exceeded, the background

of this area turns red. If the range in use is exceeded, the numeric display digits change from black

to blue. There are three display areas in the top centre of the display, SOG, Clock and display unit

selected. If both Master and Slave units are used, the name of the relevant unit will indicated here.

The background of the display area is green for the Master, and red for the Slave. The clock is con-

trolled by the built-in computer. It is also possible to control the clock from an external source. Refer

to Chapter 2.6.7.5.

The upper area is used to display the depth below keel, or depth below sensor, the speed over the

ground ( SOG ). GPS data, in which the speed is included, are required for this indication. The top,

right-hand side of the display is used to indicate the current sound velocity [ Sv1 ]. The current sound

velocity is set via the relevant menu. Refer to Chapter 2.6.7.3. If the echosounder is connected to an

external sound velocity measuring system, the sound velocity indication is controlled from there. To

enable this, the unit is set to automatic control via the relevant menu.

The additional data, like Longitude ( Lon ) and Latitude ( Lat ) are only displayed, if the unit is con-

nected to a navigation system.

The indications for Temperature ( Tem ), Salinity ( Sal ) and Density ( Den ) are only displayed, if the

corresponding data are fed to the unit (sensor).

2.4.2 Echograph PresentationsIn the survey echograph, the echo recording is presented in colour according to the sea bed struc-

ture. A scale corresponding to the range selected can be seen at the right-hand side of the display.

The scale can also be presented across the whole width of the display. The presentation mode is

changed via the relevant menu. Refer to Chapter 2.6.1.3.

Every time the range is changed, a vertical yellow line is set, the beginning and end of which are in-

scribed (Figure 2-13). At the same time as the range is changed, an information window, indicating

the new range, appears for a period of 3 seconds (Figure 2-14 ).



Figure 2-13 Marker line on the Display

Figure 2-14 Change of Range (Range Window)

Start marker Range markerold Range

Time marker

Range Window



A further presentation mode is the 2 channel display presentation. In the WD 1+ WD 2 operating mo-

de, information from both transducers is presented on the display, see Figure 2-14 . The water depth

WD 2 is shown on the left-hand side of the display and water depth WD 1 on the right-hand side. If

only WD 2 is selected, only the sea bed structure measured by the second transducer is shown. This

operating mode is selected via the relevant menu, refer to Chapter 2.6.1.2, or by using the CURSOR

keys [ up or down ].

Figure 2-15 Presentation in the Display Mode: WD 2 200 kHz + WD 1 12 kHz

Another form of display presentation is a large numerical presentation of the depth in a window, with

a white background, refer to Chapter 2.6.1.2. (Figure 2-16). If the alarm is activated, this window will

turn red ( Figure 2-35). The background of the window also changes to red, if a sounding failure or

interface error occurs.



Figure 2-16 Display Mode: Large Depth Display WD 2 200 kHz NAV

This appears on the display, if the ENTER key is pressed. If the ESCAPE key is pressed, this pre-

sentation disappears from the display.

If the threshold is set to 0, using the THRESHOLD keys, a grey scale display presentation appears,

similar to an echo recording on paper.



Figure 2-17 Grey Scale Presentation ( Threshold 0)

2.4.3 Status LineThe following parameters are displayed at the bottom edge of the display.

- Status

- Threshold

- Store

- Auto

- # 0

- Lin or Log

- Continuous

- GAIN (WD 1 and WD 2)

- Date

- Manufacturer's name

Status: This field indicates, whether or not the unit is ok. Normally this window will indicate

Status OK. If an error occurs during operation, this will be indicated as, for example

ERROR 3.

Only the error with the highest priority will be indicated. The test items can be called

up via the "Test" menu. Refer to Chapter 2.6.9.1.



Threshold: This field indicates the control steps, which are set using the THRESHOLD keys

(Figure 2-6).

The range of settings lies between 0 and 10.

Store: After pressing the STORE key (Figure 2-3 ), the following Store information appears

in this field: ON, when the storing process begins. When the STORE key is pressed

once again, the following information appears in this field: OFF. The storage process

has been completed. Storing can only be carried out, when sensors are connected.

Auto: If the Autophase function is called up via the "Sonar Parameter" menu, the parame-

ters OFF, Automatic and Manual appear in sub-menu 1. If the parameter "Automatic"

is called up, the word "Automatic" appears in this field. If the parameter "Manual" is

called up, the word "Manual" appears in this field. Refer to Chapter 2.6.6.1.

#: This field indicates, which console is in use. The console for Master is always 0.

Log or Lin: This setting specifies, whether the presentation is linear or logarithmic. Linear presen-

tation is used, if only the sea bed is to be shown. If sediment structures or shoals of

fish are to be observed, Logarithmic presentation must be selected.

GAIN: The Gain setting is also displayed in the status line. If the unit is operating with auto-

matic Gain, the characters will be black. If the unit is operating in the manual mode,

the setting is made via the menu, the characters will be red. The Gain setting range

is from -80 dB to + 79 dB in steps of 1 dB. The Gain is shown in two adjacent fields, if

the unit is operating in the WD1 + WD 2 modee. .

Continuous: This field indicates, which type of pulse is in use. When the continuous pulse mode is

in use, the word "Continuous" appears in this field. If the type of pulse is switched to

"NAV", the word " NAV" appears. The type of pulse is changed, using the keyboard,

(Figure 2-3). The NAV mode is revoked by pressing the "NAV " key for approx. 3

seconds. The indication in the field changes from "NAV " to "Continuous". The ope-

rating mode can also be revoked via the relevant menu. Refer to Chapter 2.6.3.1. Ex-

ternal triggers and LOG can be set via the SONAR PARAMETER - PULSE

SEQUENCE menu. These will be displayed accordingly.

Further information in the status line includes the date and manufacturer's name.



2.5 Altering System Parameters and Settings

To switch the unit ON, press the ON / OFF key (Figure 2-3 ). After switching ON, the following display

initially appears for approx. 5 seconds ( Fig. 2-18 )

Figure 2-18 Display at Switch- ON

The unit then switches ON and assumes the settings last used. If the alarm circuit is switched ON,

both red alarm marker lines are set. The alarm marker lines only appear, if they were active before

the unit was last switched OFF. The acoustic alarm is switched OFF when the unit is initially switched

ON.

To switch the unit OFF, the ON / OFF (Figure 2-3) key must be held pressed for a period of at least

3 seconds. The unit then switches OFF after a period of 5 seconds. This is a built-in safety device,

to prevent the unit from being switched OFF inadvertently.

2.5.1 THRESHOLD, RANGE and DIM SettingsThe settings THRESHOLD, RANGE ( depth range ) and DIM ( background lighting for display and

keyboard ) are made by pressing the corresponding key. There are keys marked with arrows

( arrow up / down ) available for each setting. Pressing these keys alters the value set. The alterations

are shown on the display and in the status line.

Display



2.5.1.1 THRESHOLDThe unit is fitted with an automatic gain control for processing the data. It is activated, whenever the

unit is switched ON. The THRESHOLD setting only influences the presentation of information on the

display. It can be set within a range of 0 to 10 ( 0 = lowest, 10 = highest step ).

If the sea bed echoes appear to be too weak, the THRESHOLD setting should be increased, in order

to achieve a clear presentation. If a lot of "noise" appears on the display, the threshold level must be

reduced. The threshold setting is indicated in the status line, at the bottom of the display area. The

setting must be altered until such time as a satisfactory presentation is achieved.

2.5.1.2 RANGE The range should be set to correspond to the depth to be expected. If for example the indicated depth

is 30 m, the 50 m range will give a better resolution than the 500 m range. It is altered in the same

way as the THRESHOLD and RANGE. There is a choice of 10 range settings available: 10 m only

by 200 kHz, 25, 50, 100, 250, 500 m by 12 and 200 kHz and only by 12 kHz 1000, 3000, 6000 and

10000 m. The range is dependent upon the operating frequency.

2.5.1.3 DIMThe display and keyboard background lighting can be adjusted in 32 steps. This allows the back-

ground lighting to be adapted to suit the environmental brightness. Increase the brightness of the

background lighting by pressing the UP key, decrease it by pressing the DOWN key.

2.5.1.4 CURSOR KEYSThese serve to mark menu items for selection within a menu and to set WD 1 12 kHz, WD 2 200 kHz

and WD 1 12 kHz + WD 2 200 kHz directly.



2.6 General Information Regarding the MENU HydroStar 4900

The menu programme is called up by pressing the ENTER key.

Press the ENTER key, the menu programme appears on the display (Figure 2-19 ).

Figure 2-19 Main Menu

2.6.1 MENÜ Display Mode 2.6.1.1 MENU Display Mode - ES WD 1 12 kHz DBKPress the ENTER key, the menu programme appears on the display.

Bring the cursor to the item Display Mode by pressing the cursor keys [ up or down ].

Press the ENTER key. The sub-menu appears, with menu items ES, Large Depth Display, Range

Marks and Lin or LOG.

Bring the cursor to the item ES by pressing the cursor keys [ up or down ]. With a single channel

survey echosounder, ES WD1appears weakly.

With a twin channel survey echosounder, the display ES appears.

Press the ENTER key. Sub-menu 1 appears, with items WD 1 12 kHz, WD 2 200 kHz and WD 1

12 kHz + WD2 200 kHz. Also stand the Information which frequency are selected for the transducer

(12 kHz or 200 kHz).

Press the ENTER key.

Bring the cursor to the item WD 1 12 kHz by pressing the cursor [ up or down ].

The menu programme disappears from the display. Transducer 1 is now in use. When the item sel-

ected in sub-menu 1 is confirmed, a tick appears alongside it, (Figure 2-20 ).



Figure 2-20 Menu Display Mode „ ES, WD 1 12kHz

If the system is fitted with two transducers, it is possible to select the second transducer using this

menu. If necessary, both transducers can be simultaneously selected using this menu. If this opera-

ting mode is selected, the display presentation also changes. The echoes are then presented on a

split display. In addition, two numerical depth indication fields appear.

Figure 2-21 Menu Display Mode „ ES, WD 1 12kHz + WD 2 200kHz

2.6.1.2 MENU Display Mode - Large Depth DisplayPress the ENTER key, the menu programme appears on the display.



Marks and Lin.

Bring the cursor to the item Large Depth Display by pressing the cursor keys [ up or down ].


The menu programme disappears from the display.



Figure 2-22 Menu Display Mode „ Large Depth Display“

After pressing the ENTER key, a window, with an enlarged numerical depth indication, appears at

the bottom of the display (Figure 2-23).

When the item selected in sub-menu 1 is confirmed, a tick appears alongside it.

Figure 2-23 Menu Display Mode „ Large Depth Display WD1 12 kHz DBK

If the operating mode WD 1 + WD 2 is selected, two large windows appear Figure 2-24. The upper

window relates to WD 2, the lower window to WD 1.



Figure 2-24 Menu Display Mode „ Large Depth Display WD 1 12kHz + WD 2 200kHz

2.6.1.3 MENU Display Mode - Range MarksPress the ENTER key, the menu programme appears on the display.



Marks and Lin.

Bring the cursor to the item Range Marks by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu appears, with items Mode 1 and Mode 2.

Bring the cursor to the item Mode 1 by pressing the cursor keys [ up or down ].

Figure 2-25 Menu Display Mode: „ Range Marks Mode 1 „





Reference scale marking lines appear over the whole width of the display, ( Figure 2-26 ).

Figure 2-26 Menu Display Mode „ Range Marks Mode 1 „

If Mode 2 is selected, in the same way as for Range Marks - Mode 1, the reference scale markings

appear at the right-hand side of the display. ( Figure 2-27 )



Figure 2-27 Menü Display Mode „ Range Marks Mode 2 „

2.6.2 MENU Alarm

2.6.2.1 MENU Alarm - Alarm activePress the ENTER key, the menu programme appears on the display.

Bring the cursor to the item Alarm by pressing the cursor keys [ up or down ].

Press the ENTER key. The sub-menu appears with the items Alarm active, Test, Acoustic alarm, WD

upper limit and WD lower limit.

Bring the cursor to the item Alarm active by pressing the cursor keys [ up or down ].

Figure 2-28 Menu Alarm „ Alarm active“





When selection is confirmed, the alarm circuit is activated. When activated, the two red alarm marker

lines appear on the display, If the alarm circuit is not activated, the alarm limits can be set via the

items WD upper limit and/ or WD lower limit.

When activated, a tick appears alongside "Alarm active".

2.6.2.2 MENU Alarm - TestPress the ENTER key, the menu programme appears on the display.




Bring the cursor to the item Test by pressing the cursor keys [ up or down ].

Figure 2-29 Menu Alarm „ Test“

Press the ENTER key. If the ENTER key is now pressed, a test signal will be generated. This signal

is audible for 3 seconds and ceases automatically.




2.6.2.3 MENU Alarm - Acoustic alarmPress the ENTER key, the menu programme appears on the display.




Bring the cursor to the item Acoustic alarm by pressing the cursor keys [ up or down ].

Figure 2-30 Menu Alarm „ Acoustic alarm

Press the ENTER key. If the ENTER key is now pressed, the acoustic alarm will be activated. When

activated, a tick appears alongside "Acoustic alarm".

The menu programme disappears from the display. To de-activate the acoustic alarm, proceed in the

same order as for activation.

2.6.2.4 MENU Alarm - WD upper limitPress the ENTER key. The menu programme appears on the display.




Bring the cursor to the item WD upper limit by pressing the cursor keys [ up or down ].

The upper limit can be de-activated by setting it to 0 or by pressing the "SPEAKER OFF" key (Figure

2-10 ). When the menu is then called up again, the alarm depth is set to starting value of 1 m.



Figure 2-31 Menu Alarm „ WD upper Limit“

Press the ENTER key, the „ WD Alarm upper limit“ ( e.g. 10 m) setting window appers on the dis-

play.

Figure 2-32 Setting Window „ WD: Alarm upper Limit“

The upper alarm limit is set by pressing the cursor keys [ up or down ]. The setting range is from 0 to

995 m, in 1 m steps, using the cursor keys [ up or down ]. By system configuration max. 10000 m

from 0 to 3405 m.


The menu programme disappears from the display and the red alarm marker line appears on the dis-

play at the required depth.

2.6.2.5 MENU Alarm - WD lower limitPress the ENTER key. The menu programme appears on the display.




Bring the cursor to the item WD lower limit by pressing the cursor keys [ up or down ].

The WD lower limit can be de-activated by pressing the "SPEAKER OFF" key (Figure 2-10 ). When

the menu is then called up again, the alarm depth is set to one metre below the end the of depth range

in use.



Figure 2-33 Menu „WD lower limit“

Press the ENTER key, the "WD Alarm lower limit" (e.g. 99 m) setting window appears on the dis-

play.

Figure 2-34 Setting Window „ WD: Alarm lower limit [ m ]

The lower alarm limit is set by pressing the cursor keys [ up or down ]. The range of adjustment is

from 3 to 1000 m, using the cursor keys [ up or down].


The menu programme disappears from the display and the red alarm marker line appears on the dis-

play at the required depth. Both lines can only be set, if there is a minimum difference of 3 m between

them.



Figure 2-35 Alarm Marker and optical alarm presentation

2.6.3 MENU Sonar Parameter

2.6.3.1 MENU Sonar Parameter- Pulse Sequence - ContinuousPress the ENTER key. The menu programme appears on the display.

Bring the cursor to the item Sonar Parameter by pressing the cursor keys [ up or down ].

Press the ENTER key. The sub-menu appears, with items Pulse Sequence, Pulse Power, Pulse

Length, Autophase and Blocking Depth.

Bring the cursor to the item Pulse Sequence by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears with items Continuous , LOG and External Trigger.

Bring the cursor to the item Continuous by pressing the cursor keys [ up or down ].

OpticalAlarm

UpperLimit

LowerLimit



Figure 2-36 Menu Sonar Parameter „ Pulse Sequence- Continuous“



When the unit is initially switched ON, it is automatically in the "Continuous" mode. The system

works only in Continuous- Mode. If the system on NAV - Mode, and the submenu Continuous is sel-

ected, after pressing the ENTER key the Continuous mode is selected.

2.6.3.2 MENU Sonar Parameter - Pulse Sequence - External TriggerPress the ENTER key. The menu programme appears on the display.


Press the ENTER key. The sub-menu appears, with items Pulse Sequence, Pulse Power,Pulse


Bring the cursor to the item Pulse Sequence by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears with items Continuous, LOG and External Trigger.

Bring the cursor to the item External Trigger by pressing the cursor keys [ up or down ].



Figure 2-37 Menu Sonar Parameter „ Pulse Sequence- External Trigger“

Press the ENTER key, the "Trigger delay" setting window appears on the display.

Figure 2-38 Setting Window „ Trigger delay „

Figure 2-39 Window of EXTERNAL Information

Information Window EXTERNAL



The Trigger delay can be set in steps of 1 ms by pressing the cursor keys [ up or down ].



This setting is required, if the transmission pulse is to be triggered by an external Sonar system. The

sounding trigger and transmission pulse delay can be set within a range of 0 to 50 ms. This setting

can be set to 0 immediately by pressing the "SPEAKER OFF" key (Figure 2-10 ).

2.6.4 Sonar Parameter MENU - Pulse Power

2.6.4.1 Sonar Parameter MENU - Pulse Power - AutomaticPress the ENTER key. The menu programme appears on the display.



length, Autophase and Blocking Depth.

Bring the cursor to the item Pulse Power by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with the items Automatic, Increase and Decrease.

Bring the cursor to the item Automatic by pressing the cursor keys [ up or down ].

Figure 2-40 Sonar Parameter Menu, " Pulse Power - Automatic "

If the menu item Automatic is selected, the transmission power is automatically controlled to match

the Range selected.

If the transmission power is controlled manually, attention must be paid to the fact, that a suitable

range is also selected.



12 kHz

In the Low Power mode, the power is 1 W, in Medium Power 46 W and in High Power approx.

2000 W.

200 kHz

In the Low Power mode, the power is 1 W, in Medium Power 16 W and in High Power approx. 200 W.

NOTE: If the smallest range is selected and the highest transmission power is used, there is

a danger, that too many sea bed echoes occur, causing multiple echoes to appear on

the display.

WARNING: Whenever the range or active transducer is altered, the Pulse Power is automatically

reset.

2.6.4.2 Sonar Parameter MENU - Pulse Power - IncreasePress the ENTER key. The menu programme appears on the display.






Bring the cursor to the item Increase by pressing the cursor keys [ up or down ].

Figure 2-41 Sonar Parameter Menu, " Pulse Power - Increase"



If the menu item Increase is selected, the transmission power is automatically controlled to match the

Range selected.

No Information window on the Display.

2.6.4.3 Sonar Parameter MENU - Pulse Power - DecreasePress the ENTER key. The menu programme appears on the display.






Bring the cursor to the item Decrease by pressing the cursor keys [ up or down].

Figure 2-42 Sonar Parameter Menu, " Pulse Power - Decrease"

If the menu item Decrease is selected, the transmission power is in medium power controlled to

match the Range selected. After pressing the Range key the system works in auto power.

Information window on the Display.



Figure 2-43 Information window "Pulse Power: Decrease"

2.6.5 Sonar Parameter MENU - Pulse Length

2.6.5.1 Sonar Parameter MENU - Pulse Power - AutomaticPress the ENTER key. The menu programme appears on the display.




Bring the cursor to the item Pulse Length by pressing the cursor keys [ up or down ].





Figure 2-44 Sonar Parameter Menu, " Pulse Length - Automatic "

If the menu item Automatic is selected, the pulse length is automatically controlled to match the Ran-

ge selected.

2.6.5.2 Sonar Parameter MENU - Pulse Length - IncreasePress the ENTER key. The menu programme appears on the display.






Bring the cursor to the item Increase by pressing the cursor keys [ up or down ].

Figure 2-45 Sonar Parameter Menu, " Pulse Length - Increase"



If the menu item Increase is selected, the next higher is selected controlled to match the Range sel-

ected.


Figure 2-46 Information window: "Pulse Length"

2.6.5.3 Sonar Parameter MENU - Pulse Length - DecreasePress the ENTER key. The menu programme appears on the display.






Bring the cursor to the item Decrease by pressing the cursor keys [ up or down ].



Figure 2-47 Sonar Parameter Menu, " Pulse Length - Decrease"

If the menu item Decrease is selected, the next lower pulse length is controlled to match the Range

selected. After pressing the Range key the system works with automatic pulse length again.


2.6.6 Sonar Parameter MENU - " Autophase "

2.6.6.1 Sonar Parameter MENU - " Autophase - OFF "Press the ENTER key. The menu programme appears on the display.




Bring the cursor to the item Autophase by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with the items OFF, Automatic and Manual.

Bring the cursor to the item OFF by pressing the cursor keys [ up or down ].



Figure 2-48 Sonar Parameter Menu, " Autophase OFF "



This operating mode ensures that the sea bed echo lies within the display range, if the measurement

range is altered. The setting is made using the RANGE keys [ up or down ].

2.6.6.2 Sonar Parameter MENU - " Autophase - Automatic "Press the ENTER key. The menu programme appears on the display.







NOTE: Autophase is not possible in RangeX. If the function "Autophase" is selected, it

is not possible to select Range X.



Figure 2-49 Sonar Parameter Menu, " Autophase Automatic "



The sea bed signal is automatically searched for in this operating mode. The start of range also alters

automatically. The system thus follows the contour of the sea bed automatically. The search se-

quence runs up within 10% of the start of the range. The RANGE keys are also enabled when this

operating mode is in use. If a measuring range change occurs, the start of range will be automatically

shifted, so that the momentary sea bed echo is projected into the centre of the display ( zoom effect).

Transducer switching is inhibited in this operating mode.

Figure 2-50 Display Presentation : Autophase Automatic



2.6.6.3 MENU Sonar Parameter - " Autophase - Manual "Press the ENTER key. The menu programme appears on the display.



Length, Autophase and Blocking Depth



Bring the cursor to the item Manual by pressing the cursor keys [ up or down ].

Figure 2-51 Sonar Parameter Menu " Autophase Manual "

Press the ENTER key. The "Range Start" setting window appears on the display. The range of ad-

justment is between 0 and 950 m [1000m ]. The setting is made in steps of 1 m, using the cursor keys

[ up or down ].

Figure 2-52 Setting Window: " Range Start"



Figure 2-53 Display Presentation: Auto: Manual

Press the ENTER key. The menu programme disappears from the display.

2.6.6.4 Sonar Parameter MENU - " Blocking Depth "Press the ENTER key. The menu programme appears on the display.



Length, Autophase and Blocking Depth

Bring the cursor to the item Blocking Depth by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with the items OFF and Manual.




Figure 2-54 Sonar Parameter Menu " Blocking Depth, Manual "

Press the ENTER key. The "Blocking Depth" setting window appears on the display. The range of

adjustment see table 2 - 1. The setting is made in steps of 1 m,.1 ft and 1 fms using the cursor keys

[ up or down ]. In addition, a red rectangle, with the blocking depth setting, appears at the right-hand

side of the display, Fig. 2-51.

Blocking depth

Table 2-1 Blocking depth

Range m

I 0 to 8

II 0 to 20

III 0 to 40

IV 0 to 80

V 0 to 200

VI 0 to 400

VII 0 to 800

VIII 0 to 2400

IX 0 to 4800

X 0 to 8000



Figure 2-55 Blocking Depth Presentation

Figure 2-56 Setting Window : " Blocking Depth"

Press the ENTER key. The menu programme disappears from the display. This setting can be set

directly to 0 by pressing the "SPEAKER OFF" key (Figure 2-10).

The Blocking Depth is set, in order that depth finding only starts from the Blocking Depth.

(suppression of noise down to the Blocking Depth).

If the setting OFF is selected, depth finding starts directly from the base of the transducer.



2.6.7 MENU PROPERTIES

2.6.7.1 MENU Properties - " User Setting - Save "Press the ENTER key. The menu programme appears on the display.

Bring the cursor to the item Properties by pressing the cursor keys [ up or down ].

Press the ENTER key. The sub-menu appears, with items User Setting, Sound Velocity, Date +

Time, Reverberation, Draft, Depth Mode, Metrics and Transducer Correction.

Bring the cursor to the item User Setting by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with items Save 1 to 4.

Bring the cursor to the item Save by pressing the cursor keys [ up or down ].

Figure 2-57 Menu Properties „ User Setting - Save 1“

Press the ENTER key, an additional window, showing storage spaces 1 to 4, appears on the screen.

The parameters set are stored, by pressing the ENTER key.


2.6.7.2 MENU Properties - " User Setting - Load "Press the ENTER key. The menu programme appears on the display.




Bring the cursor to the item User Setting by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with items Load 1 to 4 and Default.

Bring the cursor to the item Load by pressing the cursor keys [ up or down ].

Press the ENTER key, an additional window appears on the screen showing storage numbers 1 to



4 and Default.

When the ENTER key is pressed, the corresponding storage space, 1 to 4, will be called up.


Figure 2-58 Menu Properties „ User Setting - Load 1“

2.6.7.3 MENU Properties - " Sound Velocity "Press the ENTER key. The menu programme appears on the display:



Time, Reverberation, Draft, Depth Mode and Transducer Correction.

Bring the cursor to the item Sound Velocity by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with the items Automatic and Manual.

Figure 2-59 Menu Properties „ Sound Velocity

If the item "Automatic" is selected, the data from the measurement sensors will be used by the sy-

stem.



NOTE: The item "Automatic" can only be selected, if the system is connected to the corre-

sponding sensors.

Press the ENTER key. The "Sound Velocity" setting window appears on the display.

Figure 2-60 Setting Window „ Sound Velocity“


The range of adjustment is between 1400 and 1650 m/s. The setting is made in steps of 1 m/ s, using

the cursor keys [ up or down ].

2.6.7.4 MENU Properties - " Date + Time "Press the ENTER key. The menu programme appears on the display.




Bring the cursor to the item Date + Time by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears with items Date, Time and External.

Bring the cursor to the item Date by pressing the cursor keys [ up or down ].

Figure 2-61 Menu Properties „ Date + Time“

Press the ENTER key. The "Date" setting window appears on the display: Year



Figure 2-62 Setting Window „ Date: Year“

The year can be set in steps of 1 year, using the cursor keys [ up or down ].

Press the ENTER key. The "Date" setting window appears on the display: Month

Figure 2-63 Setting Window „ Date: Month

The month can be set in steps of 1 month, using the cursor keys [ up or down ].

Press the ENTER key. The "Date" setting window appears on the display: Day

Figure 2-64 Setting Window „ Date: Date

The day can be set in steps of 1 day, using the cursor keys [ up or down ].








Bring the cursor to the item Time by pressing the cursor keys [ up or down ].



Figure 2-65 Menu Properties“ Date + Time“

Press the ENTER key. The "GMT - Time: Hour" setting window appears on the display: Hour

Figure 2-66 Setting Window „ GMT- Time: Hour „

The hour can be set in steps of 1 hour, using the cursor keys [ up or down ].

Press the ENTER key. The "GMT - Time: Hour" setting window appears on the display: Minute

Figure 2-67 Setting Window „ GMT- Time: Minute „

The minutes can be set in steps of 1 minute, using the cursor keys [ up or down ].


NOTE: If data are taken from an external source (GPS or Data Distributor) and the system is

set to external data, data and time settings are latched, i.e. they can not be altered

manually.

NOTE: If the English language is chosen as the factory setting, the time will be displayed in

the 12 hour format, showing AM / PM. If the German language is set, the time will be

displayed in the 24 hour format.









Bring the cursor to the item External by pressing the cursor keys [ up or down ].

Press the ENTER key. The menu programme disappears from the display. The time and date are

regenerated by an external trigger in this operating mode. The time and date are controlled by the

unit itself.

2.6.7.7 Properties MENU - " Reverberation "Press the ENTER key. The menu programme appears on the display.




Bring the cursor to the item Reverberation by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with the items Store All, Store Range, Manual, Sup-

pression WD1 and Suppression WD2.

Bring the cursor to the item Store All by pressing the cursor keys [ up or down ]. The noise field for

the current sounding mode is measured, at between 0 and 7.5 m from the surface of the transducer

and stored by pressing the ENTER key. The measurement can be made in the WD 1 and WD 2 mo-

des.

Figure 2-68 Menu Properties - " Reverberation "



In sub- menu 1, bring the cursor to the Item Store All using the cursor [ up or down] and confirm by

pressing the ENTER key. The display appears on the red depth display: Reverberation Measure-

ment. The measurement is shown down on the display.

Figure 2-69 Information Window "Reverberation Measurement"

2.6.7.8 Storage Range Bring the cursor to the item Store Range by pressing the cursor keys [ up or down ].

Figure 2-70 Menu Properties. Reverberation "Storage Range"

In sub- menu 1, bring the cursor to the Item Store Range using the cursor [ up or down ] and confirm



by pressing the ENTER key. The storing of reverberation is only for the selected range.

2.6.7.9 Storage Manual

Figure 2-71 Menu Properties. Reverberation "Storage Manual"

If the echograph is still afflicted with noise after storing, it is still possible to set the reverberation ma-

nually. To do this, Reverberation must be called up from the menu. In sub-menu 1, bring the cursor

to the item Manual using the cursor keys [ up or down ] and confirm by pressing the ENTER key.

The setting window appears on the display: Reverberation ( Blocking depth).

Figure 2-72 Setting Window: „ Reverberation ( Blocking Depth m )“

The Blocking depth can be set in steps of one dm, using the cursor keys [ up or down ]. The range

of adjustment is between 0 and 1 m, in steps of 0.1 m. If the Reverberation is set to below 0.0 m, the

word Storage appears in the setting window ( = reverberation suppression using the stored data

storing).

Figure 2-73 Setting Window: „ Reverberation ( Blocking Depth) Storage “



If Storage is selected, the reverberation measurement will take effect for the transducer, otherwise

the Blocking Depth set will apply. If the system is equipped with two transducers, storage must also

be carried out for the second transducer.

Press the ENTER key. The menu programme disappears from the display. The information will be

stored at the same time.

NOTE: Storing reverberation manually should be carried out in all ranges.

2.6.7.10 MENU Properties - " Draft "Press the ENTER key. The menu programme appears on the display.




Bring the cursor to the item Draft by pressing the cursor keys [ up or down ].

Figure 2-74 Menu Properties „ Draft“

Press the ENTER key. The Draft setting window appears on the display.

Figure 2-75 Setting Window „ Draft“

The Draft setting is used to set the transducer installation depth compensation. This setting makes it

possible to perform measurements from the surface of the water to the sea bed. The range of adju-

stment is between 0 and 2999 cm.



2.6.7.11 MENU Properties " Depth Mode"Press the ENTER key. The menu programme appears on the display.




Bring the cursor to the item Depth Mode by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with the items DBK and DBS.

Bring the cursor to the item DBK by pressing the cursor keys [ up or down ].

Figure 2-76 Menu Properties „ Depth Mode“

Press the ENTER key. The display presented the standard graphic.



Figure 2-77 Depth Mode „ DBK“

The second measurement is DBS Mode.

Bring the cursor to the item Depth Mode by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with the items DBK and DBS.

Bring the cursor to the item DBS by pressing the cursor keys [ up or down ].



Figure 2-78 Depth Mode „ DBS“

Press the ENTER key. The display presented the Standard graphic with the DBS line on the top of

the graphic.

2.6.7.12 MENU Properties " Metrics"Press the ENTER key. The menu programme appears on the display.




Bring the cursor to the item Metrics by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with the items Meter, Fathoms and Feet.

Bring the cursor to the item Meter by pressing the cursor keys [ up or down ].



Figure 2-79 Properties Menu “ Meter“

Press the ENTER key. The display presented the standard graphic with Meter - Scale.

Figure 2-80 Standart graphic with Meter - Scale

The second Metric- Mode is Fathoms- Scale.



Bring the cursor to the item Fathoms by pressing the cursor keys [ up or down ].

Press the ENTER key. The display presented the standard graphic with Fathoms - Scale.



Figure 2-81 Standart graphic with Fathoms - Scale



Bring the cursor to the item Feet by pressing the cursor keys [ up or down ].

Press the ENTER key. The display presented the standard graphic with Feet - Scale.



Figure 2-82 Standart graphic with Feet - Scale

2.6.7.13 MENU Properties " Transducer Correction"Press the ENTER key. The menu programme appears on the display.




Bring the cursor to the item Transducer Correction by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with the item WD 1 [12 kHz] and WD 2 [200 kHz].

Bring the cursor to the item WD1 12kHz by pressing the cursor keys [ up or down ].

Figure 2-83 Menu Properties „ Transducer Correction



In sub-menu 1, bring the cursor to the item WD1 12 kHz using the cursor keys [ up or down ] and

confirm by pressing the ENTER key. The setting window appears on the display: Keel correction.

Figure 2-84 Setting Window „ Keel correction „

The Keel correction can be set in steps of one cm, using the cursor keys [ up or down ]. The range

of adjustment is between 0 and 1999 cm.

This correction can be made for Transducer [ WD1] and Transducer [ WD2 ].

After setting press ENTER key, the display show a Warning Confirmation. Is the setting o.k. switch

off the system, the new setting is storage now.

Figure 2-85 Confirmation Window

2.6.8 MENU Data Storage

2.6.8.1 MENU Data Storage - " Show "Press the ENTER key. The menu programme appears on the display.

Bring the cursor to the item Data - Storage by pressing the cursor keys [ up or down ].

Press the ENTER key. The sub-menu appears on the display, with items Show, Search and Clear.

Bring the cursor to the item Show by pressing the cursor keys [ up or down ].



Figure 2-86 Menu „ Data Storage - Show“

Press the ENTER key. The SURVEY ECHOSOUNDER display presentation changes to a graphic

presentation. The Data Storage menu is used to gain access to data stored in the built-in cyclic me-

mory. This data can then be presented on the display. If a printer is connected, the momentary dis-

play contents can be printed out.

The following information can be taken from the presentation.

The date can always be seen at the top left-hand corner.

The status line is shown vertically on top of the presentation. The status line is at the left-hand side

to begin with. Whenever the status changes, a new status line appears. The status contains the fol-

lowing information.

1. Time

2. Longitude

NOTE: Only if data is available from a data distributor connected to the system. Otherwise only

zeroes appear.

3. Latitude ( see remark for Longitude )

4. Water Depth mode ( W1 + W 2)

5. The measurement range is identified by a horizontal line and is newly inscribed whenever changes

are made. The measurement range information appears in yellow lettering. The water depth is pre-

sented as a yellow line

6. If the alarm circuit is activated, a broad, green line appears at the bottom edge of the display.

7. If a depth alarm ( WD ) was triggered, a broad red line appears at the bottom edge of the display,

in place of the green line.

8. If the echosounder is controlled by the "External trigger" pulse sequence, a broad, light blue line

appears at the top edge of the display.



9. If the Mark key is pressed, to mark an echo signal, a vertical line appears over the whole height of

the display. The time, at which the marker was set, is inscribed next to the line.

The recording can be scrolled through, using the RANGE UP + DOWN ( Fig. 26 ) keys.

When all information have been evaluated or printed out, normal survey echosounder presentation

can be called up via the menu. The menu is called up as described in Chapter 2.6.7.1 and the item

Abort appears in sub-menu 1

Press the ENTER key. The Data presentation disappears and the Survey echosounder presentation

re-appears on the display. The Survey echosounder presentation can also be recalled by pressing

the "ESCAPE" key.

2.6.8.2 MENU Data Storage - " Search "Press the ENTER key. The menu programme appears on the display.

Bring the cursor to the item Data Storage by pressing the cursor keys [ up or down ].


Bring the cursor to the item Search by pressing the cursor keys [ up or down ].

Figure 2-87 Menu „ Data Storage - Search“

Press the ENTER key. The "Date" setting window appears on the display: Year

Figure 2-88 Setting Window „ Date: Year“

The year can be set in steps of 1 year, using the cursor keys [ up or down ].

Press the ENTER key. The "Date" setting window appears on the display: Month



Figure 2-89 Setting Window „ Date: Month“

The month can be set in steps of 1 month, using the cursor keys [ up or down ].

Press the ENTER key. The "Date" setting window appears on the display: Day

Figure 2-90 Setting Window „ Date: Day“

The day can be set in steps of 1 day, using the cursor keys [ up or down ].

Press the ENTER key. The "Date" setting window appears on the display: GMT- Time: Hour

The clock can be set in steps of 1 hour, using the cursor keys [ up or down ].

Figure 2-91 Setting Window „ Date: Hour“

Press the ENTER key. A graphic presentation of the data storage information for the desired area,

which was searched for via this menu, appears on the display.

In order to return to normal operation, echosounding must be called up from the menu. The menu is

called up as described in Chapter 2.6.6.1 and the item Abort appears in sub-menu 1

The recording can be scrolled through, using the RANGE UP + RANGE DOWN keys.

Press the ENTER key. The Data presentation disappears and the Survey Echosounder presentation

re-appears on the display.

NOTE: It is not possible to call up the test mode in either the Data Storage or Search modes.



2.6.8.3 MENU Data Storage - " Clear "Press the ENTER key. The menu programme appears on the display.

Bring the cursor to the item Data Storage by pressing the cursor keys [ up or down ].


Bring the cursor to the item Clear by pressing the cursor keys [ up or down ].

Figure 2-92 Menu „ Data Storage - Clear“

After pressing the ENTER key, a warning message is displayed:

Figure 2-93 Warning Message for „ Data Storage - Clear“

When the ENTER key is now pressed, all information will be erased from the cyclic memory. The

show function is then disabled for approx. 15 minutes. If "Data Storage - Show" is called up before

the 15 minutes have expired, a message appears saying "Not sufficient data".



Figure 2-94 Message „ Not surfficient data“

2.6.8.4 MENU PRINT Press the ENTER key. The menu programme appears on the display.

Bring the cursor to the item Print by pressing the cursor keys [ up or down ].

Press the ENTER key. The sub-menu appears, with items Hardcopy and Unlimited.

Figure 2-95 Menu Print

After pressing the ENTER key, the contents of the current display, without the menu, will be printed

out. In the position unlimited, in this mode a automatically print out of a new completed picture is pos-

sible.



2.6.9 MENU Testmode 2.6.9.1 MENU Testmode - "Built In Test "Press the ENTER key. The menu programme appears on the display.

Bring the cursor to the item Testmode by pressing the cursor keys [ up or down ].

Press the ENTER key. The sub-menu appears, with items Built In Test, Oscilloscope, Gain, Key

Gain, Offline BITE, SW Reset and Service.

Bring the cursor to the item Built In Test by pressing the cursor keys [ up or down ].

Figure 2-96 Menu „ Testmode - Built In Test“

With Built In Test, an automatic test procedure is initiated. The following tests are carried out:

ONLINE - Test

Various monitoring routines run in the background, during normal operations. In order to detect pos-

sible malfunction ( e.g. temperatures, supply voltages ) the corresponding error code will be shown

in the status line when relevant. If more than one fault/error is present, the fault/error with the highest

priority will be displayed in the status line. This highest priority fault/error will be stored in the data

memory every "TIMESTEP" and is also visible when scrolling through the memory.

Built In Test

If the Built In Test function is called up via the sub-menu, a list of all measuring points in plain text will

appear, showing their current status.



Figure 2-97 Display Presentation of the items tested by the Built In Test

2.6.9.2 MENU Testmode - " Oscilloscope "Press the ENTER key. The menu programme appears on the display.




Bring the cursor to the item Oscilloscope by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with the items None and Rectified Echo.

Bring the cursor to the item Rectified Echo by pressing the cursor keys [ up or down ].



Figure 2-98 Menu „ Testmode - Oscilloscope - Rectified Echo“

When the menu item TESTMODE - Oscilloscope - Rectified Echo is selected, the oscilloscope pre-

sentation, with echo signal, appears on the display. The presentation depends on depth and time.

Figure 2-99 Oscilloscope - Echo Signal Presentation“

Presentation of the rectified echo is only possible on the master unit. No water depth is indicated in

the information box, see Figure 2-99 , the word "Oscilloscope Mode" appears in its place.

After pressing the ENTER key, the menu appears, with items Print, Testmode, LCD Test and About.



This provides the option of printing out the graphic presentation. When the "ESCAPE" key is pressed,

the unit automatically returns to the echosounding mode.

2.6.9.3 MENU Testmode - " Key Gain "Press the ENTER key. The menu programme appears on the display.




Bring the cursor to the item Key Gain by pressing the cursor keys [ up or down ].

Press the ENTER key, the THRESHOLD keys [ up or down ] are enabled and it is now possible to

alter the gain factor manually. The word Gain appears in the status line in red lettering. If the Test-

mode menu is called up again, Key Threshold appears in the sub-menu. The function of the THRES-

HOLD keys is reset by pressing the ENTER key.

Figure 2-100 Menu „ Testmode- Key Gain“

2.6.9.4 MENU Testmode - " Gain "Press the ENTER key. The menu programme appears on the display.

Bring the Cursor to the item Testmode by pressing the cursor keys [ up or down ].



Bring the cursor to the item Gain by pressing the cursor keys [ up or down ].

Press the ENTER key. Sub-menu 1 appears, with the items Automatic and Manual.


This operating mode is in permanent operation. This means that the AGC operates automatically,



monitored by the processor unit.

If Testmode Gain is selected and the Gain is controlled manually, the manual function can be swit-

ched OFF again by selecting Gain - Automatic.


( Only possible, at single channel mode WD1or WD 2, not at dual channel mode WD1 + WD2)

Figure 2-101 Menu Testmode „Gain Manual“

By pressing the ENTER key, the AGC is switched OFF and the reception signal amplification control

must be carried out manually. After pressing the ENTER key, the GAIN setting window appears on

the display.

Figure 2-102 Setting Window „ GAIN“

The GAIN adjustment range is set using the cursor keys [ up or down ]. The range of adjustment

lies between - 80 and + 79 dB, in steps of 1 dB. This setting makes it possible to control the echo

signal manually, if reception is poor.

If the unit is switched ON again after being switched OFF, it automatically returns to the Automatic

mode.

The normal method of switching the manual mode OFF is via the menu.



2.6.9.5 OFFLINE - Test

Before the Offline Test is started, a confirmation Window is displayed.

Figure 2-103 Confirmation Window

Two tips of tests are possible.

1. Completely test with transducer.

ATTENTION: By completely test a sound beam is transmitted in the water.

2. Test without active transducer.

This test is an passive test, the test points TVG, Transducers LF are not tested. The test points on

the graphic show no information.

In addition, the so called "Offline BITE" can also be started. When the Offline BITE- Test is started,

echosounding is first terminated and then all important assemblies are tested, for function and adhe-

rence to tolerances, with the aid of a synthetic test signal. The results are also presented in the form

of a list. This enables defective PCB's / components to be identified in case of a fault in the system.



Figure 2-104 Display Offline BITE

2.6.9.6 MENU Test Mode - SW ResetPress the ENTER key. The menu programme appears on the display.




Bring the cursor to the item SW Reset by pressing the cursor keys [ up or down ].


Figure 2-105 Menu „SW- Reset“

After Pressing the ENTER key, a Warning Window is displayed.



Figure 2-106 Warning Window „ SW Reset“

This mode is only possible, when the system is not started exactly. For the reset starting press the

ENTER key.

2.6.9.7 MENU LCD Test Press the ENTER key. The menu programme appears on the display.

Bring the cursor to the item LCD Test by pressing the cursor keys [ up or down ].

Figure 2-107 Menu „ LCD Test“

Press the ENTER key. After pressing the ENTER key, the five basic colours ( black, blue, green, red

and white ) appear on the display. In addition, the complete display area will turn black, blue, green,

red and white in sequence. No echo presentation appears on the display during this test, the numeric

display continues to run. When the test is completed, the normal echo presentation returns to the dis-

play. This colour test is carried out to establish if there are any pixels missing from the display.



2.6.9.8 MENU About Press the ENTER key, the menu programme appears on the display.

Bring the cursor to the item About by pressing the cursor keys [ up or down ].

Figure 2-108 Menu „ About“

Press the ENTER key. After pressing the ENTER key, the ABOUT window appears.

Figure 2-109 Window ABOUT

The following information can be seen in this window:

- Serial number

- Year of manufacturing

- SW- Version



- DSP- SW Version

- Operation time

The ABOUT Window disappears when the ESCAPE key is pressed.

2.6.9.9 MENU Master Press the ENTER key, the menu programme appears on the display.

Bring the cursor to the item Master by pressing the cursor keys [ up or down ].

Press the ENTER key. The sub-menu appears, with items Console e.g. 1 and Make Available

Here it can be stipulated, which console is the master console.

Each console connected is given a number. The first console, belonging to the main unit, is always

given the number 0. Each additional console is given a consecutive number. If several are switched

ON, the corresponding numbers appear in the menu.

If the cursor is set to the menu item "Make Available", the privileges are enabled. This makes it pos-

sible to specify any one of the consoles connected to be the master. To enable this, Master - Fetch

must be selected at the corresponding console.



PART 3

MAINTENANCE AND ONBOARD SERVICE



LIST OF CONTENTS3 MAINTENANCE AND ONBOARD SERVICE............................................................... 119

3.1 Maintenance................................................................................................................. 119

3.1.1 General......................................................................................................................... 119

3.1.2 Warning Labels ........................................................................................................... 119

3.1.3 Warning Label for Connectors...................................................................................... 119

3.1.4 Special Tools, Measuring and Test Instruments .......................................................... 120

3.1.5 Maintenance................................................................................................................. 120

3.2 Maintenance Work ....................................................................................................... 121

3.2.1 Testing the Unit for Operability..................................................................................... 121

3.2.2 Two Weekly Checks..................................................................................................... 132

3.3 Repair........................................................................................................................... 133

3.3.1 Testing the Transmission Power .................................................................................. 134

3.3.2 Testing the Reception Signal ....................................................................................... 135

3.3.3 Transducer Insulation Test........................................................................................... 136

3.3.4 Cleaning the transducer .............................................................................................. 136



LIST OF FIGURE Figure 3-1 Display Mode - NAV............................................................................................... 121

Figure 3-2 Presentations on the Display WD1 12kHz DBK + WD2 200kHz DBK.................. 122

Figure 3-3 Alarm Marker Lines................................................................................................ 123

Figure 3-4 Presentation of Built In Test................................................................................... 124

Figure 3-5 Offline BITE Test.................................................................................................... 125

Figure 3-6 Presentation of NAV- Mode ................................................................................... 131

Figure 3-7 Range Presentation ............................................................................................... 132

Figure 3-8 Fuse Inside the HydrStar 4900 .............................................................................. 133

Figure 3-9 Oscilloscope- „ Echo Signal Presentation“............................................................ 135



3 MAINTENANCE AND ONBOARD SERVICE

3.1 Maintenance

3.1.1 GeneralThe system must not put into operation until it has been fully, correctly installed.

WARNING: Changes to settings must only be carried out by qualified technicians. If chan-

ges to settings have not been authorised, you must not continue.

WARNING: UNAUTHORISED CHANGES TO SETTINGS CAN IMPAIR THE SAFETY OF THE

SHIP AND LEAD TO LOSS OF LIFE OR LIMB.

CAUTION: The Naval safety regulations must be strictly adhered to when carrying out

maintenance and repair work.

3.1.2 Warning LabelsThe HydroStar 4900 is fitted with the following warning labels, which must be strictly observed.

3.1.3 Warning Label for Connectors

3.1.3.1 Warning Label for High Voltage



3.1.3.2 Warning Label for ELECTROSTATIC SENSITIVE DEVICES

3.1.4 Special Tools, Measuring and Test InstrumentsNo special tools are required to carry out maintenance and repair work on the HydroStar 4900 Survey

Echosounding System.

3.1.5 Maintenance

3.1.5.1 Spare Parts and Consumables

3.1.5.2 Tools

Number Designation Part No. NATO No. Chapter

1 Fuse 4A 06 710 1400 3.3.1

2 Fuse 0.5A 06 710 1003 5920 121 70 1986 3.3.1

3 Polishing Cloth 3.2.2.1

4 Paint remover 3.3.6

5 Brush, soft 3.3.6

Number Designation Chapter

1 Allain key, 6mm 3.3.1

2 Screwdriver, 4 mm 3.3.1



3.1.5.3 Measurement and Test Equipment

3.2 Maintenance Work

3.2.1 Testing the Unit for OperabilityThe unit should undergo a weekly operability test.

The following items must be tested.

- Switch the unit ON, using the ON / OFF key.

The system must start in the NAV - Mode

Figure 3-1 Display Mode - NAV

Number Designation Chapter

1 Insulation tester 500 VDC / 0 to 500 MOhm 3.3.5

2 Multimeter 3.3.1

3 Storage oscilloscope:Frequency: 0 to 100 MHz / 2 Probe 100 : 1 3.3.3



- Call the menu programme up, using the ENTER key

- Bring the CURSOR to the item Display Mode and press the ENTER Key.

- Select WD1 12kHz DBK + WD2 200kHz DBK and press the ENTER key. Two echo presentations

must appear.

Figure 3-2 Presentations on the Display WD1 12kHz DBK + WD2 200kHz DBK

- Call the menu programme up, using the ENTER key

- Bring the CURSOR to the item Alarm and press the ENTER key.

- Bring the CURSOR to the item Alarm active and press the ENTER key. If upper and lower alarms

are set, 2 red lines appear on the display.



Figure 3-3 Alarm Marker Lines

- Press the ENTER key.

- Bring the CURSOR to the item Alarm and press the ENTER key.

- Bring the CURSOR to the item Test and press the ENTER key. The acoustic alarm must sound for

approx. 5 seconds.


- Bring the CURSOR to the item Testmode and press the ENTER key.

- Bring the CURSOR to the item Built In Test and press the ENTER key. The Built In Test items ap-

pear on the display ( Figure 3-4).



Figure 3-4 Presentation of Built In Test

The following items are tested during the Built In Test

Temperature PGN 47 1 ( TMP ) 27.0 OK

Temperature EBE 177 ( TMP ) 27.0 OK

Temperature PGN 47 2 ( TMP ) 27.0 OK

+ 3.3 V Supply ( digital ) 3.3 OK

+ 5.0 V Supply ( digital ) 5.0 OK

+ 5.0 V Supply ( CompactPCI ) 5.0 OK

+12.0 V Supply ( analog ) 11.5 OK

- 12.0 V Supply ( analog ) -11,7 OK

+ 5 V Supply ( analog ) 5.0 OK

- 5.0 V Supply ( analog ) -5.0 OK

+ 48.0 V Supply ( Transmitter ) 48.3 OK

+ 24.0 V Supply ( auxiliary ) 23.5 OK



0.0/+12.0 V Blower ( off/on ) 0.0 OK

+ 24.0 V Supply ( DAZ ) 23.5 OK

+ 12.0 V Supply ( DRS ) 11.6 OK



+ 12.0 V Supply ( LEG ) 11.5 OK

+ 12.0 V Supply ( DAZ ) 11.5 OK

+ 12.0 V Supply ( Display ) 12.2 OK

+ 5.0 V Supply ( Display ) 5.0 OK

+ 5.0 V Supply ( Keys ) 5.0 OK

+ 5.0 V Supply ( DAZ ) 5.0 OK

- 12.0 V Supply ( DAZ ) -11.5 OK

DAZ Alarm OFF


- Bring the CURSOR to the item Testmode and press the ENTER key.

- Bring the CURSOR to the item Offline BITE and press the ENTER key. The Offline BITE Test items

appear on the display (Figure 3-5).

Figure 3-5 Offline BITE Test



The following items are tested during the Offline BITE Test:

Offline BITE

Testpoint # 1: Configuration

Testpoint # 2: Operational Status

Testpoint # 3: Fan Off / On

Testpoint # 4: Alarm Off / On

Testpoint # 5: Test TVG

Testpoint # 6: Tx Voltage ( LF)

Testpoint # 7: Power Amplifier ( LF)

Testpoint # 9: Echosimulation (LF/ HF)

Test finished.

Start of evaluation.

TP #1: Configuration

Serial Number: 0050

DSP-SW Version: DSP-Ver. 1.7

Year of Manufacturing: 2002

SW Version: 2.8

WNR1

Type: LSE179

Frequency: 12000 Hz

Power: 2000 W

Resistance: 1500 Ohm

Correction: 0 cm

WNR2

Type: LSE140

Frequency: 200000 Hz

Power: 250 W

Resistance: 70 Ohm

Correction: 0 cm

Transducer 3 not installed.

Transducer 4 not installed.



Type of ship: Surfaceship

Draft: 600 cm

Printer: one installed

Serial interfaces

COM5: not connected

COM6: not connected

COM7: not connected

COM8: not connected

COM9: not connected

COM10: not connected

Analog inputs

DRS1: not installed

LOG: not installed

Frequency inputs

LEG23-1: not installed

LEG23-2: not installed

Hardware Configuration

CE15 : does not exists

PGN47 (Channel 1) V3 : exists

PGN47 (Channel 2) V1 : exists

LV203 (Channel 1+2): exist

Harddisk : exists

TP #2: Operational Status

Temperature PNG47 1 (TMP).............. : 27.0 OK

Temperature EBE177 (TMP)............... : 27.0 OK

Temperature PNG47 2 (TMP).............. : 27.0 OK

+3.3 V Supply (digital)...........................: 3.3 OK

+5.0 V Supply (digital)...........................: 5.0 OK

+5.0 V Supply (CompactPCI)................:. 5.3 OK

+12.0 V Supply (analog).......................: 11.5 OK

-12.0 V Supply (analog)........................: -11.5 OK

+5.0 V Supply (analog).........................: 5.0 OK

-5.0 V Supply (analog)..........................: -5.0 OK

+48.0 V Supply (Transmitter)................: 48.2 OK

+24.0 V Supply (auxiliary).....................: 23.5 OK



+12.0 V Supply (auxiliary).....................: 11.5 OK

+5.0 V Supply (auxiliary).......................: 5.0 OK

0.0/+12.0 V Blower (off/on)...................: off

+24.0 V Supply (DAZ)...........................: 23.5 OK

+12.0 V Supply (DRS)...........................: 11.5 OK

+12.0 V Supply (LEG)...........................: 11.5 OK

+12.0 V Supply (DAZ)...........................: 11.5 OK

+12.0 V Supply (Display).......................: 11.5 OK

+5.0 V Supply (Display).........................: 5.0 OK

+5.0 V Supply (Keys).............................: 5.0 OK

+5.0 V Supply (DAZ)..............................: 5.0 OK

-12.0 V Supply (DAZ).............................: -11.4 OK

DAZ Alarm.............................................: on

TP #3: Fan On/Off

Fan Off: 0 V OK

Fan On: 10 V OK

TP #4: Alarm Off/On

Alarm Off: 1 V OK

Alarm On: 12 V OK

TP #5: Test TVG

Ch1(Soll: 2750): 2740 OK

Ch 2(Soll: 2750): 2711 OK

Ch 3(Soll: no reference): 5134

Ch 4(Soll: no reference): 5134

TP #6: Tx Voltage (LF)

Channel 1: TX- Voltage

Ref. + 48 V: 46 V OK

Ref. + 100 V: 107 V OK

Ref. + 200 V: 200 V OK



TP #7: Power Amplifier (LF)

WD 1 Power Amplifier ( LF)

Voltage ( + 46V ): 39 V OK

Voltage ( +100V ): 91 V OK

Voltage ( +200V ): 177 V OK

Current ( +100V ): - 624 mA Failure

Current ( +200V ): - 1262 mA Failure

Impedance ( + 46 V) - 155 Ohm Failure



Power ( + 46 V) - 5 Watt

Power ( + 100 V) - 28 Watt

Power ( + 200 V) - 112 Watt

TP #9: Echosimulation

Echo simulation Ch 1: 9547 cm Failure

Echo simulation Ch 2: 9547 cm Failure

Error analysis

Class B. Failure

LF Power Amplifier ( + 100 V), Current for WD 1 out of tolerance

Check: Transducer WD 1 not connected, EBE 180, EBE 177, PGN 47, PSE 42.

Class B. Failure

LF Power Amplifier ( + 200 V), Current for WD 1 out of tolerance


Class B. Failure

LF Power Amplifier ( + 46 V), Impedance for WD 1 out of tolerance


Class B. Failure





Class B. Failure



Offline BITE finisched.

The following trouble points are shown on the status field:

Trouble codes

- #1: Timeout serielle Interface to DSP

- #2: CPU-Temperature to high

- #3: HW- Temperature to high

- #4: Supply 3.5 V (digital) out of tolerance

- #5: Supply 5.0 V (digital) out of tolerance

- #6: Supply 5.0 V (CPU) out of tolerance

- #7: Supply 12.0 V (analog) out of tolerance

- #8: Supply -12.0 V (analog) out of tolerance

- #9: Supply 5.0 V (analog) out of tolerance

- #10: Supply -5.0 V (analog) out of tolerance

- #11: Supply 48.0 V (Transmitter) out of tolerance

- #12: Supply 24.0 V (aux) out of tolerance



- #15: Supply 24.0 V (DAZ) out of tolerance

- #16: Supply 12.0 V (DRS) out of tolerance

- #17: Supply 12.0 V (LEG) out of tolerance

- #18: Supply 12.0 V (DAZ) out of tolerance

- #19: Supply 12.0 V (Display) out of tolerance

- #20: Supply 5.0 V (Display) out of tolerance

- #21: Supply 5.0 V (Keys) out of tolerance

- #22: Supply 5.0V (DAZ) out of tolerance

- #23: Error number does not exist









- #30: Wrong number of data from DSP

- #31: False Header from DSP


- Bring the CURSOR to the item LCD Test and press the ENTER key. No graphic presentation will

appear on the display, only the 5 basic colours black, blue, red, green and white will be seen. Upon

completion of this test, normal graphic presentation will return.

- Press the NAV key, the indication NAV mode will appear briefly on the display. The graphic presen-

tation on the display and the word NAV appears in the status line (Figure 3-6 ).

Figure 3-6 Presentation of NAV- Mode

- Press the NAV key for approx. 5 s, the indication Continuous Mode appears briefly on the display.

The graphic presentation starts to move again and the word Continuous appears in the status line

( Figure 3-6).

- Press the MARK key, a line appears on the display, from top to bottom, with the time alongside it.

- Press the RANGE up and down keys briefly, the indication Range m and the range selected

appears briefly on the display. At the same time, a line from top to bottom appears, marked with a 0

at the top and the range selected at the bottom. The designation WD1 also appears alongside the

line ( Figure 3-7 )



Figure 3-7 Range Presentation

3.2.2 Two Weekly Checks- Testing the Unit for Completeness.

- Check, that the screws securing the housing are in place and check tighten them.

- Check all connectors are securely fitted.

- Check, that both handles are tightly fitted.

- Check, that spare fuses are available for the unit.

- Inspect the unit for mechanical damage and damage to the paint work.

- Repair damage with on board materials or initiate repair measures.

3.2.2.1 Cleaning the Unit- Clean the Hydrostar4900 , using a brush or duster.

- Clean all Plexiglas panes on the unit, using an anti-static cloth.

3.2.2.2 Testing the Unit Prior to Putting to SeaThe unit must undergo a functional check before the ship puts to sea.

Carry out a functional check in accordance with Section 3.2.1.



3.3 Repair

3.3.0.1 Replacing FusesThe mains fuses F 1 and F 2 ( Mains) and the fuses F 3 to F 5 ( Heater)are located within the housing

of the HydrioStar 4900. The front panel must be removed, to gain access for replacement. Release

the 2 securing screws, using a 6 mm Allen key and pivot the front panel downwards. The fuses are

located in the top left-hand corner on the PCB rack. The fuse holders can be removed with the aid of

a screwdriver ( 4 mm ). Check the fuses, using a multimeter. Replace the defective fuse and close

the front panel of the unit.

Figure 3-8 Fuse Inside the HydrStar 4900

F3 F5 F4 F2 F1



3.3.1 Testing the Transmission PowerNOTE: This test may only be carried out, if a transducer or Simulator is connected to the system.

Switch the HydroStar 4900 OFF. Open the Distribution Box or Connection Box AK 82 and connect

the oscilloscope using the 100 : 1 probe. Do not connect grounds. Measurement only in Differential

Mode.

WARNING: After switching the unit ON, there are voltages at the Connection Box terminals,

which present a danger to life.

Switch the unit ON by pressing the ON / OFF key . Select Range X ( 10000 m, 12 kHz ),

using the RANGE keys.

Measure the following value with the aid of the oscilloscope:

12 kHz with LSE 179

AK 82 pin 20 - 21 or 1 - 2

V = 840 to 1332 Vpp

t = 100 ms

200 kHz with LSE 140

V = 376 Vpp to 596 Vpp

t = 20 ms.

If the value measured lies outside the given values, this can be adjusted by means of potentiometer

R17 on the PGN 47.

If adjustment is necessary, switch the unit OFF by pressing the ON / OFF key. Then open the front

panel, and pull the transmission stage out after removing the protection plate. The transmission volta-

ge can now be aligned. After checking the transmission voltage, switch the unit OFF, replace the pro-

tection plate and close the front panel.

Remove the oscilloscope probes from the distribution box terminals and close it.

NOTE: Ensure that the seal for the cover is correctly seated.



3.3.2 Testing the Reception SignalNOTE: This test may only be carried out, if a transducer or Simulator EDI is connected to the

system.

Test the reception path, using the unit's Testmode. Switch the unit ON by pressing the ON / OFF key.

Press the ENTER key, the main menu appears. Bring the CURSOR to item Testmode using the

CURSOR keys. Press the ENTER key and bring the CURSOR to item Oscilloscope. Press the

ENTER key again and the item Rectified Echo appears Press the ENTER key once again and the

oscilloscope presentation appears on the display.

Figure 3-9 Oscilloscope- „ Echo Signal Presentation“



3.3.3 Transducer Insulation TestSwitch the unit OFF by pressing the ON / OFF key .

WARNING: Fasten a " DO NOT SET INTO OPERATION ..... ! " sign on the unit.

Loosen the screws securing the distribution box VK 10 or Connection Box AK 82 cover and remove

it. Disconnect the two transducer cable cores from the distribution box VK 10 or Connection Box

AK 82 terminals and carry out an insulation test as follows.

- Blue transducer connection - Ground > 1 MOhm

- Black transducer connection - Ground > 1 MOhm

The measurement must be made using a 500 VDC insulation tester.

NOTE: If the value lies below 1 Mohm, the transducer must be replaced.

Re-connect the two transducer cable cores to the terminals in the connection box AK 82 or Distribu-

tion Box VK 10 . Ensure that the seal for the cover is correctly seated.

NOTE: Reverse connection of the cores will have no influence upon the function of the system.

Remove the warning sign and return the unit to its original state.

3.3.4 Cleaning the transducerWhen the ship is in dry dock, clean and inspect the transducer.

Inspect the transducer for possible marine growth. If the transducer is affected by marine growth,

such growth must be removed using a soft brush and clean water. If the growth is difficult to remove

using a soft brush, a flat piece of wood ( spatula ) can be used to remove it.

WARNING: Never use a wire brush or metal scraper to remove growth from the transducer.

After cleaning the transducer, inspect the abrasion protector for damage. If this is damaged, the

transducer must be replaced. If there is damage to the abrasion protector, this can cause eddy cur-

rents, which will have a detrimental affect upon the display presentation.

NOTE: Always mask the transducer surface off when the ship's hull is painted. Upon completion of

work, the surface of the transducer must be painted by hand with anti-fouling, to avoid trapping air.

Painting the transducer surface applies not only to hull surface mounted transducers but also to

transducers installed behind an acoustic window.



WARNING: Do not use normal ship's paint on the transducer, only use anti-fouling.

Remove old anti-fouling with paint remover and not with a scraper.

hydrostar 4900.pdf

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technical data

transducer cable specification

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