cable fault locator tdr-ta3

Cable fault locator

TDR-TA3.7 OPERATION MANUAL

Cable fault locator TDR-TA3.7

________________________________________________________________________

________________________________________________________________________

2

Table of Contents

Page

Introduction ..................................................................................................................................... 7

1 Purpose ................................................................................................................................... 8

2 Main Technical Data and Parameters ...................................................................................... 9

2.1 Distance Measurement Range .......................................................................................... 9

2.2 Sounding Pulse Parameters ............................................................................................ 10

2.3 Setting Range of Propagation factor value ...................................................................... 10

2.4 Receiving Path Sensitivity ............................................................................................... 10

2.5 Asynchronous Interference Reduction ............................................................................. 10

2.6 Non-Volatile Memory Capacity ........................................................................................ 10

2.7 BALANCEed Impedance Range...................................................................................... 11

2.8 Operation Mode Setting Time .......................................................................................... 11

2.9 Power Supply .................................................................................................................. 11

2.10 Continuous Operation Time ............................................................................................. 11

2.11 Maximum Power consumption ........................................................................................ 11

2.12 Overall Dimensions ......................................................................................................... 11

2.13 Weight ............................................................................................................................. 11

2.14 Climate Conditions .......................................................................................................... 11

2.15 Mechanical Stress Strength ............................................................................................. 12

2.16 Health Safety ................................................................................................................... 12

2.17 Reliability ......................................................................................................................... 12

3 Device Composition and Delivery Package ............................................................................ 13

4 TDR-TA3.7 Device Structure and Function ............................................................................ 14

4.1 Principle of Operation ...................................................................................................... 14

4.2 Reflectograms of Typical Irregularities............................................................................. 15

4.3 Parameters of Measurement Subranges ......................................................................... 17

4.4 Appearance ..................................................................................................................... 17

4.5 Control and Display Elements ......................................................................................... 19

4.5.1 Location and function of the control and display elements ........................................ 19

4.5.2 General Structure of the Device User Interface ........................................................ 20

4.5.3 Keyboard Description ............................................................................................... 22

4.6 Description of Window Interface ...................................................................................... 24


________________________________________________________________________

________________________________________________________________________

3

4.6.1 Window "MEASUREMENT" .................................................................................... 24

4.6.2 Window "MEASUREMENT" , menu "CHANNELS" ................................................... 26

4.6.3 Window "MEASUREMENT" , menu "PARAMETERS" .............................................. 27

4.6.4 Window "WAVEFORMS LIBRARY" .......................................................................... 28

4.6.5 Window "CABLES PF LIBRARY" ............................................................................. 29

4.6.6 Window "DEVICE SETTINGS" ................................................................................. 30

5 Safety Precautions ................................................................................................................. 32

6 Preparation for Operation and Operation Procedure .............................................................. 33

6.1 Preparation for Operation ................................................................................................ 33

6.1.1 Visual Inspection ...................................................................................................... 33

6.1.2 Initial Position of Controls ......................................................................................... 33

6.2 Device Start-Up ............................................................................................................... 33

6.3 The TDR-TA3.7 Device Adjustment ................................................................................ 34

6.3.1 Selection of Master-Channel .................................................................................... 34

6.3.2 Control of Operation Modes of the Measurement Channels Inputs ........................... 34

6.3.3 Measurement Subrange Adjustment ........................................................................ 36

6.3.4 Sounding Pulse Duration Adjustment ....................................................................... 37

6.3.5 Setting of the Propagation factor value ..................................................................... 37

6.3.6 Averaging Adjustment .............................................................................................. 37

6.3.7 Setting of the Gain Ratio .......................................................................................... 38

6.3.8 Adjustment of the Reflectogram Curve Displacement ............................................... 38

6.3.9 Adjustment of Input Impedance BALANCEing .......................................................... 39

6.3.10 Adjustment of the Measurement Sample Spacing .................................................... 39

6.3.11 Setting of mode "Difference" ..................................................................................... 39

6.3.12 Setting of mode "CAPTURE" .................................................................................... 40

6.3.13 Adjustment of Propagation Speed Representation Method ....................................... 40

6.3.14 Adjustment of Time and Date of the Integrated Calendar ......................................... 40

6.3.15 Adjustment of the Device Sleep Timer ...................................................................... 41

6.3.16 Setting of the File Name Prefix of Reflectogram ....................................................... 41

6.3.17 Reset of the User Settings ........................................................................................ 42

6.3.18 Selection of Calibration Base .................................................................................... 42

6.3.19 Selection of the Device Configuration ....................................................................... 42

6.3.20 Adjustment of Attenuation Parameter A (configuration "Heat supply networks") ....... 43

6.4 Measurement Procedure ................................................................................................. 43

6.4.1 Connection of the Device to the Line to Be Measured .............................................. 43


________________________________________________________________________

________________________________________________________________________

4

6.4.2 Measurement of the Line under Check ..................................................................... 43

6.4.3 Measurement of the Propagation factor value by Known Length of Line ................... 44

6.4.4 Measurement o Distance to an Irregularity of the Checked Line ............................... 44

6.5 Analysis of Typical Irregularities of the Checked Line ...................................................... 45

6.5.1 Determination of Distances to Couplings, Twist Joints and Interruptions .................. 45

6.5.2 Determination of Distance to Short Circuit Between Cores ....................................... 45

6.5.3 Determination of the Distance to "Soaked" Section of Cable .................................... 46

6.5.4 Determination of the Distance to Parallel Branch Conductor .................................... 47

6.5.5 Determination of "Pair Distortion" ............................................................................. 47

6.6 Use of the Device Reflectograms Library ........................................................................ 48

6.6.1 Saving of Reflectogram in the Reflectograms Libraries. ........................................... 48

6.6.2 Screen-shot of Window "MEASUREMENT" ............................................................. 48

6.6.3 Reflectogram Memory (Reflectogram Library) Recall ............................................... 49

6.6.4 Deleting a Reflectogram from the Memory (Reflectogram Library) ........................... 49

6.6.5 Cleaning of the Reflectogram Library ....................................................................... 50

6.6.6 Exporting of Reflectogram Library to an External Storage Medium ........................... 50

6.6.7 Importing of Reflectogram Library from External Storage Medium ............................ 50

6.7 Use of the Device Propagation factor value Library ......................................................... 51

6.7.1 Setting of the Cable Propagation factor value (PF) from the Library ......................... 51

6.7.2 Adding of the Cable Propagation factor value (PF) to the Library ............................. 52

6.7.3 Deleting of the Cable Propagation factor value (PF) from the Library ....................... 52

6.7.4 Cleaning of the Propagation factor value Library ...................................................... 52

6.7.5 Exporting of the Propagation factor value Library to an External Storage Medium .... 53

6.7.6 Importing of Propagation factor value Library from External Storage Medium ........... 53

6.8 Battery State Control ....................................................................................................... 54

6.9 Operation of the TDR-TA3.7 from Recharger .................................................................. 54

6.10 Updating of the TDR-TA3.7 Software .............................................................................. 54

6.11 Switch OFF the TDR-TA3.7 Device ................................................................................. 55

7 Possible Faults and their Remedies ....................................................................................... 56

8 Maintenance .......................................................................................................................... 57

9 Transportation and Storage .................................................................................................... 58

10 Marking .................................................................................................................................. 59

11 Acceptance Certificate ........................................................................................................... 60

12 Data on Preservation and Packing ......................................................................................... 61

13 Warranty Statement ............................................................................................................... 62


________________________________________________________________________

________________________________________________________________________

5

14 Notice of Faults ...................................................................................................................... 63

Revision History ............................................................................................................................ 64


________________________________________________________________________

________________________________________________________________________

6

Designations and Abbreviations

PF — Propagation Factor

PC — Personal Computer

SW – Software

Manual — Operational Manual

Selector — displays current function of buttons F1 through F10 in a rectangular section of the screen

next to the corresponding button.

Master-channel — the channel used as a standard for synchronization of measuring parameters for

other channels.


________________________________________________________________________

________________________________________________________________________

7

Introduction

This Operation Manual (Manual) is a document, confirming the basic parameters and

technical characteristic of the time domain reflectometer TDR-TA3.7 (hereinafter refer to as TDR-

TA3.7 device), guaranteed by the manufacturing enterprise.

The Manual allows to become familiar with composition and operation principle of TDR-TA3.7

device and sets operation rules, compliance with which ensures its permanent readiness to use.

Only staff, which has passed secondary technical training and is experience in electric

instrumentation use, is allowed to operate the device.


________________________________________________________________________

________________________________________________________________________

8

1 Purpose

The TDR-TA3.7 device is intended for the measurements on symmetrical and non-symmetrical

cables with impedance from 25 Ω to 500 Ω, as listed below:

cable length measurement

measurement of the distance to impedance irregularities or to faults

determination of fault nature

writing to the memory and replaying at least 300 reflectograms from it for their subsequent

processing in steady-state conditions

display of measurement results on LCD screen with a resolution capability of 640x480 pixels.


________________________________________________________________________

________________________________________________________________________

9

2 Main Technical Data and Parameters

2.1 Distance Measurement Range

Hereinafter, unless otherwise is specified, the time intervals are scaled to distance intervals,

setting the propagation factor (PF) as constant and equal to 1.499.

The distance measurement range (time delay) is from 0 m to 128000 m (from 0 μs to 1280

μs).

Measurement subranges and the corresponding limits of permissible distance reduced

measurement error (time delay) at a normal temperature range from 15°C to 25°C are given in Table

2-1.

Table 2-1

Measurement subrange,

XN, m, (at PF=1.499)

Measurement

subrange, XN, μs

Limits of permissible distance reduced

measurement error, % of the subrange

value

at normal temperature

range + 15°C to +

25°C

at operation

temperature

range

– 20°С to +

15°С,

+ 25°С to +

40°С

15.625 0–0.15625 μs ± 0.2 % ± 0.4 %

31.25 0–0.3125 μs ± 0.1 % ± 0.2 %

62.5 0–0.625 μs ± 0.05 % ± 0.1 %

125 0–1.25 μs ± 0.025 % ± 0.05 %

250 0–2.5 μs ± 0.013 % ± 0.026 %

500 0–5 μs ± 0.01 % ± 0.02 %

1000 0–10 μs ± 0.01 % ± 0.02 %

2000 0–20 μs ± 0.01 % ± 0.02 %

4000 0–40 μs ± 0.01 % ± 0.02 %

8000 0–80 μs ± 0.01 % ± 0.02 %

16000 0–160 μs ± 0.01 % ± 0.02 %

32000 0–320 μs ± 0.01 % ± 0.02 %

64000 0–640 μs ± 0.01 % ± 0.02 %

128000 0–1280 μs ± 0.01 % ± 0.02 %


________________________________________________________________________

________________________________________________________________________

10

The limits of permissible distance reduced measurement error (time delay) at operation

temperature range from 20°C to 15°C and from 25°C to 40°C are given in Table 2-1.

2.2 Sounding Pulse Parameters

Sounding positive polarity pulse parameters are given in Table 2-2.

Table 2-2

Parameters

of

sounding

pulse

Pulse

20

ns

50

ns

100

ns

200

ns

500

ns 1 μs 2 μs 5 μs

10

μs

20

μs

50

μs

τи, μs ≤

0.02

≤

0.05

0.1 ±

0.01

0.2 ±

0.02

0.5 ±

0.05

1.0 ±

0.01

2 ±

0.2

5 ±

0.5

10 ±

1.0

20 ±

2.0

50 ±

5.0

τн, ns,

maximum 10 10 10 10 10 10 10 10 10 10 10

Umax, V,

minimum 10,0 10,0 10,0 10,0 10,0 10,0 10,0 10,0 10,0 10,0 10,0

Note: a pulse with a duration of 10 ns is provided in the device; however, its parameters

are not metrologically supported.

Note: the sounding pulse duration in any subrange shall be selected from the following

series: 10 ns, 20 ns, 50 ns, 100 ns, 200 ns, 500 ns, 1 μs, 2 μs, 5 μs, 10 μs, 20 μs, 50 μs.

2.3 Setting Range of Propagation Factor

The setting range of the propagation factor (PF) is within 1.000 and 3.000 with a pitch 0.001.

2.4 Receiving Path Sensitivity

The sensitivity of receiving path at signal excess by a factor of two the noise level on all

subranges is as same or better as 30 mV.

2.5 Asynchronous Noise Reduction

Asynchronous noise reduction — the averaging rating is from 1 to 128.

2.6 Non-Volatile Memory Capacity

The non-volatile memory capacity is at least 1000 reflectograms and at least 500 PF values.


________________________________________________________________________

________________________________________________________________________

11

2.7 BALANCEed Impedance Range

BALANCEed impedance range is from 25 to 500 Ω.

2.8 Operation Mode Setting Time

Operation mode setting time is 30 sec. maximum.

2.9 Power Supply

The TDR-TA3.7 device is supplied with power from an integrated non-spillable battery with a

voltage of (7.2±0.7) V, 6.6 Ah.

The TDR-TA3.7 device design includes battery discharge monitoring and automatic device

switching off after 1, 4, 8, 32, 64 minutes of idle time (no buttons used).

2.10 Continuous Operation Time

The TDR-TA3.7 device continuous operation time from the battery is at least 6 hours and

depends on the battery state. The continuous operation time via type ES25E12-120 recharger is not

limited.

2.11 Maximum Power consumption

The TDR-TA3.7 device maximum power consumption while battery charging is not more than

25 W for the ES25E12-120 recharger.

2.12 Overall Dimensions

Overall dimensions of the TDR-TA3.7 device are not more than:

length — 270 mm

width — 246 mm

height — 124 mm

2.13 Weight

The weight of the TDR-TA3.7 device with a battery is 2.5 kg maximum.

2.14 Climate Conditions

The TDR-TA3.7 device is a portable instrument and intended for operation both in the field and

in steady-state conditions.

climatic version type of the TDR-TA3.7 device is group 4 as per GOST 22261


________________________________________________________________________

________________________________________________________________________

12

operation temperature range is from minus 20°C to plus 40°C

relative air humidity is 98% at 25°C

transportation and storage conditions are from minus 50°C to plus 50°C.

2.15 Mechanical Stress Strength

The TDR-TA3.7 device is robust and service-strong against the exposure of sinusoidal vibration

within the frequency range between 10 Hz to 55 Hz in accordance with group 4 as per GOST 22261.

2.16 Health Safety

The TDR-TA3.7 device is not a source of aggressive or toxic gases and acoustic noise.

2.17 Reliability

Mean time between failures, Tf, is at least 6000 hours.

The specified service life, Тserv., is not less than 5 years.


________________________________________________________________________

________________________________________________________________________

13

3 Device Composition and Delivery Package

The TDR-TA3.7 device delivery package includes the following:

Cable fault locator TDR-TA3.7 — 1 pc.

Operation Manual — 1 pc.

ES25E12-120 recharger1 — 1 pc.

connection cable — 2 pcs.

bag for accessories — 1 pc.

CD with software — 1 pc.

Note: the recharger is supplied with the Certificate of Compliance.

1 Or similar one (12 V * 2.08 A)


________________________________________________________________________

________________________________________________________________________

14

4 TDR-TA3.7 Device Structure and Function

4.1 Principle of Operation

The time domain reflectometry method, which is based on the phenomenon of partial

reflection of electromagnetic waves in places of the line surge impedance changes, is implemented

in the device. When measuring with use of pulse method (TDR), the device sends a rectangular

sounding pulse, which, partially reflecting from irregularities returns. The sounding and reflected

pulses are observed on the screen, which can be scaled by distance and amplitude, and evaluate

the line irregularity nature with respect to their appearance (see cl. 4.2, 6.5). The reflected pulses

return to the device after some time from the moment of sending of the sounding pulse. Knowing the

electromagnetic wave propagation speed along the line and delay time of the reflected signal, the

distance to the surge impedance irregularity can be calculated.

22

dd t

PF

сtL

(4.1)

where, L is the distance to irregularity, m

v is the electromagnetic wave propagation speed in the line, m/μs

td is delay time of the reflected signal, μs

с is the speed of light in vacuum, equal to 299.8 m/μs

PF is the propagation factor value.

The surge impedance irregularities are caused by cable manufacturing process non-

conformances, as well as by mechanical and electrical damages during construction and operation

of lines. The irregularity occurs in points of connection of any devices (coupling, branch conductor,

cable splice, inductance choke, etc.) or in points of damages (disconnection, short circuit, cable core

soaking, leakage to ground, leakage to the adjacent wire, distorted pairs, etc.). The time domain

reflectometry method allows to register multiple irregularities both distinct and extended, depending

on ratio between their length and minimum wave length in the sounding pulse spectrum.

The the propagation factor value is individual for each cable type. It is associated with the

dielectric constant of cable sheath as per the following equation: v

сPF (4.2)

where ε is the dielectric constant of cable insulation.


________________________________________________________________________

________________________________________________________________________

15

The propagation factor value PF (or value of signal propagation speed v) can be determined

experimentally from the known length of cable (see cl. 6.4.3). In this case, the inverse problem is to

be solved:

dtL

сPF

2 or dt

L

2

(4.3)

4.2 Reflectograms of Typical Irregularities

Table 4-1 Reflectograms of typical irregularities

Reflectogram type Description

This reflectogram shows the case of signal reflection from the

larger impedance point (the second cursor), which corresponds

to cable break. The state, described by the reflectogram, is

named as typical break (COMPLETE OPEN).

Reflection with signal polarity change corresponds to the short

circuit in cable, the lesser impedance irregularities. This state

is named a typical short circuit (DEAD SHORT).

This reflectogram shows the situation of partial break (the

second cursor) (PARTIAL OPEN), which is followed by

complete break.

The reflectogram represents the case, when a partial short

circuit (PARTIAL SHORT), marked by the second cursor, is

followed by cable break.

This reflectogram displays three soldered joints on cable. The

soldered joint, marked by the second cursor that is clearly seen

by the level of reflection from irregularity.


________________________________________________________________________

________________________________________________________________________

16

Presence of faulty amplifier in the line results in an increased

reflection from the amplifier. The signal from reflectometer shall

be processed at the amplifier, however, an additional reflection

(phantom image) can appear downstream the amplifier.

Presence of branches may result in measurement error

because of multiple reflections. The second cursor in

reflectogram marks the branch. Two oppositely directed

reflected signal display two ends of the branch.

Presence of additional impedance or welded seam result in

the occurrence of S-shaped reflection in the reflectogram. A

low-impedance one accompanies the high-impedance

reflection.

A well BALANCEed cable with terminator absorbs the

reflection signal completely. Such a reflectogram serves as the

guarantee that the terminator is selected correctly, which does

not cause the reflection.

Cable soaking is reflected in the reflectogram as an accident

reflection area. The beginning of this area, marked by the

second cursor in reflectogram, corresponds to the beginning of

the cable soaking section.

Moisture build-up in cables leads to the occurrence of the

noise component in the reflectogram.

Note to Table 4-1: The pulse amplitudes are given in the corresponding proportions at the

same gain.


________________________________________________________________________

________________________________________________________________________

17

4.3 Parameters of Measurement Subranges

The positive polarity pulse with an amplitude of 10 V maximum is used in the device, as

sounding one. The sounding pulse width for each measurement subsection is set automatically (see

Table 4-2). Moreover, the user within the limits of 10 ns can additionally change it to 50 μs.

Sample spacing for each subrange is set automatically by default (see Table 4-2) in such a

way that the whole subrange can be displayed on the screen. Moreover, the sample spacing may

be chosen by the user (within the limits of 0.3125 ns to 2560 ns), that allows to review the

reflectogram in detail stating from any subrange section.

Table 4-2 Parameters of measurement subranges

Subrange, m Pulse Width

by default, ns

Default sample

spacing, ns

Default sample

spacing, m (at

PF=1.499)

Minimum

sample spacing,

m

(at PF=1.499)

0–15.625 10 0.3125 0.03125 0.03125

0–31.250 10 0.6250 0.06250 0.03125

0–62.500 20 1.2500 0.12500 0.03125

0–125 50 2.5000 0.25000 0.03125

0–250 100 5.0000 0.50000 0.03125

0–500 200 10.0000 1.00000 0.03125

0–1000 500 20.0000 2.00000 0.03125

0–2000 1000 40.0000 4.00000 0.03125

0–4000 2000 80.0000 8.00000 0.03125

0–8000 5000 160.0000 16.00000 0.03125

0–16000 10000 320.0000 32.00000 0.03125

0–32000 20000 640.0000 64.00000 0.03125

0–64000 20000 1280.0000 128.00000 0.03125

0–128000 20000 2560.0000 256.00000 0.03125

From the Equation 22

dd t

PF

сtL (4.1) follows that the measurement error of the

distance to irregularity, L, shall be determined by:

the time delay measurement error, td, (is determined by sample spacing)

setting error of propagation factor PF, (or v)


________________________________________________________________________

________________________________________________________________________

18

additionally, as a consequence of the reflected signal shape distortion in lines with frequency-

dependent losses, a measurement cursor setting error, associated with the complicity of the

reflectogram interpretation by the operator, occurs. The measurement error is also influenced by

the irregularity nature, its value and presence of several irregularities in a line. The reflectogram

readability can be improved by BALANCEing the device impedance with the line (with use of

knobs BALANCE L1 and BALANCE L2).

The TDR-TA3.7 device ensures automatic calculation of the distance, L, which corresponds

to the distance between measurement cursors on the screen and is displayed on the screen in digital

form.

4.4 Appearance

The device appearance is shown in figure 4-1.

Figure 4-1. The TDR-TA3.7 device appearance


________________________________________________________________________

________________________________________________________________________

19

4.5 Control and Display Elements

4.5.1 Location and function of the control and display elements

All control and display elements are located on the front panel.

Figure 4-2. The TDR-TA3.7 device front panel

Keys to Figure 4-2 are given in Table 4-3.


________________________________________________________________________

________________________________________________________________________

20

Table 4-3. Function of the control and display elements

No. Designation on

the front panel

Purpose

1 Display of the device

2 DC IN 12V Slot for connection of recharger or power supply source

3

The device power reset button (see cl. 7.2)

4 Slot for connection to USB flash drive

5 Slot for connection of service cable (not used during operation)

6 LINE L1 Slot for connection of the line to be measured to the device channel L1

7 BALANCE L1 Knob for BALANCEing the device channel L1 with the surge

impedance of the line to be measured

8 LINE L2 Slot for connection of the line to be measured to the device channel L2

9 BALANCE L2 Knob for BALANCEing the device channel L2 with the surge

impedance of the line to be measured

4.5.2 General Structure of the Device User Interface

The device is equipped with 5.7" TFT-screen with a resolution of 640x480 pixels. The TDR-

TA3.7 device display is intended for display of measurement results, as well as for control and setting

of the device operation parameters.

The device is controlled with the use of the keyboard (see cl. 4.5.3) via window interface (see

cl. 4.6), which has the following structure (Figure 4-3):

Window "MEASUREMENT" (cl. 4.6.1)

menu "CHANNELS" (cl. 4.6.2)

menu "PARAMETERS" (cl. 4.6.3)

Window "WAVEFORMS LIBRARY" (cl. 4.6.4)

Window "CABLES PF LIBRARY" (cl. 4.6.5)

Window "DEVICE SETTINGS" (cl. 4.6.6)

The integrated battery charge level, current date and time are displayed in all windows in the

top right corner of the screen.


________________________________________________________________________

________________________________________________________________________

21

Работа с рефлектограммами сохраненными в

энергонезависимой памяти

Окно «БИБЛИОТЕКА РФГ»

Работа со справочной таблицей коэффициентов

укорочения для различных типов кабелей

Окно «БИБЛИОТЕКА КУ»

Общие настройки прибора, обмен данными с внешним

накопителем

Окно «НАСТРОЙКИ ПРИБОРА»

Кнопка F12

Окно «ИЗМЕРЕНИЕ»

Управление каналами отображения

Меню «КАНАЛЫ»

Настройка параметров зондирования мастер-канала

Меню «ПАРАМЕТРЫ»

Кнопка F5 (ПАРАМЕТРЫ)

Кнопка F5 (КАНАЛЫ)

Кнопка F2(БИБЛИОТЕКА КУ)

Кнопка F1 (БИБЛИОТЕКА РФГ)

Кнопка F5(ВЫХОД) Кнопка F5

(ВЫХОД)

Кнопка F5(ВЫХОД)

Figure 4-3. General structure of the user interface

“DEVICE SETTINGS” window

General settings of the device,

data exchange with external

storage media

Button F12 Button F5

(EXIT)

Button F5

(EXIT) Button F5

(EXIT)

Button F1

(WAVEFORMS LIBRARY)

Button F2

(CABLE PF LIBRARY)

“MEASUREMENT” window

“WAVEFORMS LIBRARY”

window

“CABLE PF LIBRARY”

window

“CHANNELS” menu “PARAMETERS” menu

Control of display channels Setting of master-channel

sounding parameters

Operation with reflectographs,

saved in non-volatile memory

Operation with look-up table,

containing propagation factor

values for different cable types

Button F5 (CHANNELS)

Button F5 (PARAMS)


________________________________________________________________________

________________________________________________________________________

22

4.5.3 Keyboard Description

The TDR-TA3.7 device is equipped with a hermetically sealed, dust- and moisture-proof

keyboard with 24 buttons. The function of buttons F1 through F10 depends on the device operation

mode. The soft selector switches, displayed on the device screen next to the button, are used to

determine the current purpose of function buttons. Description of the button function is given in Table

4-4.

Table 4-4 (part 1 of 2)

Button Function

Device power supply ON and OFF (see cl. 6.2, 6.11).

F1-F10 Selection with use of soft selector switch, located next to the button.

1. In "MEASUREMENT", menu "CHANNELS": displacement upwards of the master-

channel reflectogram (see cl. 6.3.8).

2. In "MEASUREMENT", menu "PARAMETERS": increase of the value of the

parameter: Scale, Pulse, PF, and Averaging, Gain (see cl. 6.3.3 – 6.3.7).

3. In windows "WAVEFORMS LIBRARY", "CABLES PF LIBRARY", "DEVICE

SETTING": Moving the cursor up along the list".

4. Symbol entering: "space", "=", "+", "-", "1".

1. In window "MEASUREMENT", "WAVEFORMS LIBRARY", "zoom in" — sequential

increase of the reflectogram detailing degree in the area of active measuring cursor

location (see cl. 6.3.10).

2. Symbol entering: "_", ".", ",", ";", "2".

1. In "MEASUREMENT", menu "CHANNELS": master-channel selection. The master-

channel selector-switch is identified by symbol (see cl. 6.3.1).

2. Symbol entering: "3","a", "b", "c".

1. In window "MEASUREMENT", "WAVEFORMS LIBRARY": moving of active

measuring cursor to the left (see cl. 6.4).

2. Symbol entering: "4","d", "e", "f".


________________________________________________________________________

________________________________________________________________________

23

TableTable 4-4 (part 2 of 2)

Button Function

1. In window "MEASUREMENT", "WAVEFORMS LIBRARY" — selection of active

cursor. The active cursor is highlighted with yellow color (see cl. 6.4).

2. Symbol entering: "5","g", "h", "i".

1. In window "MEASUREMENT", "WAVEFORMS LIBRARY" — moving of active cursor

to the right (see cl. 6.4).

2. Symbol entering: "6","j", "k", "l".

1. In "MEASUREMENT", menu "CHANNELS": displacement downwards of the master-

channel reflectogram (see cl. 6.3.8).

2. In window "MEASUREMENT", menu "PARAMETERS" — decrease of values of

parameters: Scale, Pulse, PF, Averaging, Gain (see cl. 6.3.3–6.3.7).

3. In windows "WAVEFORMS LIBRARY", "CABLES PF LIBRARY", "DEVICE SETTING":

Moving the cursor down along the list".

4. Symbol entering: "7", "m", "n", "o".

1. In window "MEASUREMENT", "WAVEFORMS LIBRARY": "zoom out" — sequential

increase of the reflectogram detailing degree in the area of active measuring cursor

location (see cl. 6.3.10).

2. Symbol entering: "8", "p", "q", "r", "s".

1. Activation of window "DEVICE SETTINGS" (see cl. 4.6.6).

2. Symbol entering: "9", "t", "u", "v".

1. Setting of additional mode CAPTURE (see cl. 6.3.12).

2. Symbol entering: "0", "w", "x", "y", "z".

Saving of the master-channel reflectogram (see cl. 6.6.1).

1. Action canceling.

2. Deleting of the symbol in the text entering mode.

1. Action confirmation, activation of setting.

2. In window "MEASUREMENT" — screenshot.


________________________________________________________________________

________________________________________________________________________

24

4.6 Description of Window Interface

4.6.1 Window "MEASUREMENT"

The window "MEASUREMENT" opens and menu "CHANNELS" becomes active upon starting (on

completion of the device software initialization process)

The window "MEASUREMENT" is the main operation window of the device and is intended for:

setting of parameters and sounding modes

display of current sounding reflectograms from inputs L1 and L2

display of reflectograms, saved in the devices non-volatile memory

performance of cursor measurements

performance of comparison analysis of reflectograms in the same reference grid (to be adjusted

with reference to reference grid of the master-channel) in modes "Pileup" and "Difference".

The following two switch-selectable measurement process control menus are provided in the window

"MEASUREMENT":

menu "CHANNELS" for display channels control: switching ON/OFF of the channels, selection

of master-channel, control of the vertical channel reflectograms displacement on the screen,

linking of the reflectogram from memory to the display channel (see cl. 4.6.2)

menu "PARAMETERS" for the setting of sounding parameters of the measuring inputs L1 and

L2 (see cl. 4.6.3)

The window "MEASUREMENT" ensures display of up to five channels in one reference grid:

two channels "Channel L1" and "Channel L2" (measuring channels, MC) display reflectograms

received from the corresponding measuring inputs L1 and L2

three channels (stored channels, SC) are intended or display of the reflectograms, saved in the

non-volatile memory.

For each active channel, the reflectogram curve is displayed with corresponding color in the

display central part. Directly under this reflectogram display area, the sounding parameters, at which

they are obtained, are shown with the same color: scale (Scale [Масш.]), sounding pulse duration

(Pulse), propagation factor valuen or half propagation speed (PF or V/2), averaging (Average), input

gain ratio (Gain), BALANCEing knob position (Imp), curve vertical displacement (Shift).

Vertical lines, indicated at the top with figures 1 and 2, are measuring cursors — the first and

the second ones, correspondingly ("C1" and "C2"). The active cursor is highlighted with yellow color.


________________________________________________________________________

________________________________________________________________________

25

Directly above the curve output area, an information field is located. The following data are

indicated in it: distances from the grid origin to cursors "C1" and "C2", distance "L" between cursors,

current cursor pitch "dC', sample spacing "dt", "CAPTURE" mode indicator.

In the display bottom part, above the "F1"–"F5" keyboard buttons, the following selector

switches are located:

"WAVEFORMS LIBRARY", "F1" button activates the window "WAVEFORMS LIBRARY", that

provides access to the reflectograms, saved in the device memory (see cl. 4.6.4.)

"CABLES PF LIBRARY", "F2" button activates the window "CABLES PF LIBRARY", that

provides access to the propagation factor values for cables of different brands, saved in the

device memory (see cl. 4.6.5.)

"Difference", "F3" button for enabling/disabling of the "Difference" function, herewith the

reflectogram point-to-point difference is performed. (see cl. 6.3.11);

"Split Pairs Mode", "F4" button for enabling/disabling of the "Split Pairs Mode" function, which is

intended for searching of splitted (broken) pairs (see cl. 6.3.2, 6.5.5)

"PARAMS/CHANNELS", "F5" button for switching between menus "PARAMETER" and

"CHANNELS" (see cl. 4.6.2).


________________________________________________________________________

________________________________________________________________________

26

4.6.2 Window "MEASUREMENT", menu "CHANNELS"

Menu "CHANNELS" is intended for control of the displayed channels set, setting the channel

reflectograms location on the screen and for selection of master-channel.

General view of the window "MEASUREMENT" with enabled menu "CHANNELS" is shown in Figure

4-4.

Figure 4-4. Menu "CHANNELS"

The menu "CHANNELS" is displayed in right part of the display, just opposite to keyboard

buttons "F6"–"F10", and includes selector switches of five channels: two selector-switches of

measurement channels (selector-switches "Channel L1" and "Channel L2") and three selector-

switches of stored channels (selector-switches "File xxx ", xxx means reflectogram file name). The

master-channel selector-switch is marked with icon .

The channel enabling/disabling is performed with use of button "F6"–"F10" next to the

corresponding channel selector-switch. Master-channel shall be selected from the active channel by


________________________________________________________________________

________________________________________________________________________

27

means of subsequent pressing the "F11" button. Herewith, the sounding parameters of active

channels are synchronized with reference to the master-channel, as described in cl. 6.3.1. Vertical

reflectogram displacement operation (see cl. 6.3.8), sounding parameters setting (see cl. 6.3.3–

6.3.7) and reflectogram saving operation (see cl. 6.6.1) are performed for master-channel.

4.6.3 Window "MEASUREMENT", menu "PARAMETERS"

Menu "PARAMETERS" is activated by "F5" button "PARAMETERS".

The menu "PARAMETERS" is intended for adjustment of basic measurement parameters of the

master-channel (see cl. 6.3.1): measurement subrange, sounding pulse duration, the propagation

factor value (PF) (V/2), values of averaging and gain (see cl. 6.3.3 – 6.3.7).

View of the window "MEASUREMENT" with enabled menu "PARAMETERS" is shown in Figure 4-

5.

Figure 4-5. Menu "PARAMETERS"


________________________________________________________________________

________________________________________________________________________

28

The menu "PARAMETERS" is displayed in right part of the display, just opposite to keyboard buttons

"F6"–"F10", and includes the following selector switches:

"Scale", button "F6" for setting of measurement range per distance (see cl. 6.3.3)

«Pulse Width», button "F7" for setting duration of sounding pulse (see cl. 6.3.4)

"PF" ("V/2"), button "F8" for setting of the propagation factor value (half propagation speed) (see

cl. 6.3.5)

"Averaging", button "F9" for adjustment of input data averaging number (see cl. 6.3.6)

"Gain", button "F10" for setting of signal gain ration (see cl. 6.3.7)

4.6.4 Window "WAVEFORMS LIBRARY"

The window "WAVEFORMS LIBRARY" is activated by button "F1" (WAVEFORMS

LIBRARY) from the window "MEASUREMENT". Window "WAVEFORMS LIBRARY" provides the

following:

reviewing of the list of reflectograms, stored in the non-volatile memory of the device

(reflectogram library)

loading reflectograms from the library into display channels, for their comparison with each other

and with reflectograms of measuring channels

deleting of not necessary reflectograms from the library.

General view of the window "WAVEFORMS LIBRARY" is shown in Figure 4-6.

Figure 4-6. Window "WAVEFORMS LIBRARY"


________________________________________________________________________

________________________________________________________________________

29

List of all saved reflectograms in the non-volatile memory is displayed directly under reference grid.

The following selector-switches are provided in the window "WAVEFORMS LIBRARY":

"Delete", "F3" button for deletion of the marked reflectogram from the library

"Delete all", "F4" button for deletion of all reflectograms from the library

«EXIT», "F5" button for quitting to the window "MEASUREMENT"

"Channel L1", "F6" button for enabling/disabling of the measurement channel "Channel L1"

"Channel L2", "F7" button for enabling/disabling of the measurement channel "Channel L2"

"File", "F8" to "F10" buttons for loading reflectograms from the library to the corresponding

display channel.

4.6.5 Window "CABLES PF LIBRARY"

The window "CABLES PF LIBRARY" is activated by button "F2" (CABLES PF LIBRARY)

from the window "MEASUREMENT". The list of cables and their corresponding propagation factor

values, PF, (or V/2, depending on the device settings, see cl. 6.3.13) is displayed in the window.

The window ensures the following:

reviewing the list of cables and the corresponding values of their propagation factor

values

updating table with new cables and values of their propagation factor value

setting the propagation factor value from the table, as an operation one for measurement.

General view of the window "CABLES PF LIBRARY " is shown in Figure 4-6.

Figure 4-7. Menu "CABLES PF LIBRARY"


________________________________________________________________________

________________________________________________________________________

30

The following selector-switches are provided in the window "CABLES PF LIBRARY":

"Delete", "F3" button for deletion of the marked entry from the library

"Delete all", "F4" button for deletion of all entries from the library


"Set", "F6" button for setting a cable PF (V/2) as an operation value

"Add PF to the library", "F8" button for adding cable LRS (V/2) to the library.

4.6.6 Window "DEVICE SETTINGS"

The window "DEVICE SETTINGS" is activated by button "F12" from the window

"MEASUREMENT".

The window "DEVICE SETTINGS" allows to adjust the following parameters of the device:

"Propagation parameter type" — the setting for adjustment of representation method in the

device for signal propagation speed in cable: like the propagation factor value, PF, or like the

half propagation speed, V/2

"Calendar" — setting of current time and date

"Automatic switch off" — setting of the device sleep timer delay by non-use

"Default file name" — assignment of file name prefix of reflectogram to be saved

"Charger type" — selection of charger type

"Line Decay Parameter" — provides adjustment of attenuation parameter for calculation of

warning curves (by device configuration "Heat supply networks")

"Device configuration" — selection between standard or specific configurations of the device,

which are optimized for a specific application field

"Calibration base" — setting of the impedance of the cable, used during calibration of

measurement function of the line surge impedance.

Window "DEVICE SETTINGS" allows to do the following:

export of the reflectograms library and the propagation factor value library to an external storage

medium like a USB-flash drive

import of the reflectograms library and the propagation factor value library from an external

storage medium like USB-flash drive

programmable reset of the device

see information about the device: full description, serial number, software version, as well as

information on manufacturer.


________________________________________________________________________

________________________________________________________________________

31

The following selector-switches are provided in the window "DEVICE SETTINGS":

"Edit", "F1" button for shifting to editing mode for the selected parameter

"Reset settings to factory default", "F3" button for returning to factory settings


"Export WAVEFORMS LIBRARY", "F6" button for creation of reserve copy of the reflectogram

library on external storage medium like USB-Flash drive

"Import WAVEFORMS LIBRARY", "F7" button for restoration of reflectogram library from reserve

copy from an external storage medium like USB-like drive

"Export CABLES LIBRARY", "F8" button for creation of reserve copy of the reflectogram library

on external storage medium like USB-Flash drive

"Import CABLES LIBRARY", "F9" button to restore the propagation factor value library from

reserve copy from external storage medium like USB-Flash drive

"About this device", "F10" button for help topics on graphical shell version, version of hashed

math package (MD5).


________________________________________________________________________

________________________________________________________________________

32

5 Safety Precautions

5.1. Only the personnel, who have studied this Manual, are allowed to operate the TDR-TA3.7device.

5.1 There are no any dangerous voltages in the TDR-TA3.7 device.

5.2 Do not open the TDR-TA3.7 device case during its simultaneous operation and battery

recharging via the recharger.

During operation at various routings, the personnel must adhere to the safety regulations, set

for operation at the given routing type.


________________________________________________________________________

________________________________________________________________________

33

6 Preparation for Operation and Operation Procedure

6.1 Preparation for Operation

6.1.1 Visual Inspection

Prior to operate the TDR-TA3.7 device, it is required to inspect it visually. Herewith, special

attention shall be paid to the controls marking and absence of visible damages.

6.1.2 Initial Position of Controls

The controls shall have the following initial position:

knobs "BALANCE L1" and "BALANCE L2" shall be in the middle position

line to be measured shall be connected to slots "LINE L1" or "LINE L2".

WARNING! prior to connecting the line, make sure that there is no voltage in it.

DO NOT: perform measurements in lines under voltage.

6.2 Device Start-Up

To start-up the device, it is required to press button and hold it until the display

illumination goes ON, window "MEASUREMENT" opens and menu "CHANNELS" becomes active

in 30 seconds. The device is ready for measurements.


________________________________________________________________________

________________________________________________________________________

34

6.3 The TDR-TA3.7 Device Adjustment

6.3.1 Selection of Master-Channel

Term "master-channel" means a display channel, which is used as a standard for adjustment

of reference grid and sounding parameters of the rest active channels.

Any of the active channels can be selected as master-channel by means of sequential

pressing the "F11" button in window "MEASUREMENT" , menu "CHANNELS", herewith the master-

channel selector-switch is marked with icon (see Figure 4-4)

Common reference grid shall be always adjusted with reference to the master-channel with

automatic scaling of channel reflectograms for correct display and cursor measurements.

For measurement channels, an automatic synchronization of all sounding parameters with

master-channel parameters shall be performed. For storage channels, which are available only for

reading, only the "PF" ("v/2") parameter shall be synchronized.

If one of the measurement channels has been selected as master-channel, the operations

below are available for it:

control of the channel sounding parameters, herewith the synchronization of sounding

parameters of the second measurement channel is performed automatically if it is active; the

storage channels are synchronized with reference to the "PF" ("v/2") parameter only

vertical displacement of reflectogram in the reference grid (see cl. 6.3.8)

saving of reflectogram in non-volatile memory (see cl. 6.6.1)

point-to-point Difference of the master-channel reflectogram from reflectograms of the rest

active channels in mode "Difference" (see cl. 6.3.11)

to detect mutual interference of lines, the master-channel is used as a signal receiver in mode

"Split Pairs Mode" (see cl. 6.3.2, 6.5.5).

If one of the storage channels is set as mater-channel, the options listed below are available

during its operation:

vertical displacement of reflectogram (see cl. 6.3.8)

detection of differences of the channels reflectograms in mode "Difference" (see cl. 6.3.11).

6.3.2 Control of Operation Modes of the Measurement Channels Inputs

The device has two measurement channels, inputs of which can be in one of the three modes,

as follows:

input-output, generator, and receiver are running in the channel — that is the sounding pulse

is generated in the same channel, in which the signal reading is obtained


________________________________________________________________________

________________________________________________________________________

35

input only, it is used as a generator in mode "Split Pairs Mode" — for evaluation of mutual

interference of lines and for searching of pair confusing points

output only, it is used as a receiver in mode "Split Pairs Mode" — for evaluation of mutual

interference of lines and for searching of pair confusing points.

Perform measurements at slot "LINE L1" in the input-output mode, as follows:

open the window "MEASUREMENT" and enable the menu "CHANNELS"

make sure that the separate input mode "Split Pairs Mode" is OFF

enable "Channel L1" by pressing "F6" button.

The reflectogram obtained from input "Line L1" is submitted to the reference grid in blue color.

The selector-switch of "Channel L1" is also highlighted with blue color and indicates the

"input/output" operation mode.

Perform measurements at slot "LINE L2" in the input-output mode, as follows:


make sure that the separate input mode "Split Pairs Mode" is OFF


The reflectogram obtained from input "Line L2" is submitted to the reference grid in green color.

The selector-switch of "Channel L2" is also highlighted with green color and indicates the

"input/output" operation mode.

To estimate effect of the line, connected to slot "LINE L1", on the line, connected to slot "LINE

L2", it is required to provide generation of sounding signal in slot "Line L1" and obtain the reading of

this signal from slot "Line L2". To do this, set the channels modes to L1-output, L2-input, as follows

below:



using "F11" button select "Channel L2" as master-channel (it is marked with icon)

enable the separate input mode by pressing "F4" button "Split Pairs Mode".

The "LINE L2" input shall be set to mode "input", the obtained reflectogram is submitted onto

reference grid in green color, the channel selector-switch is highlighted with green color and

indicated the operation mode — "input"

The "LINE L1" input is automatically set to operation mode — "output".


________________________________________________________________________

________________________________________________________________________

36

To estimate effect of the line, connected to slot "LINE L2", on the line, connected to slot "LINE

L1", it is required to provide generation of sounding signal in slot "Line L2" and obtain the reading

of this signal from slot "Line L1". To do this, set the channels modes to L1-input, L2-output, as follows

below:


enable "Channel L1" by pressing "F6" button

using "F11" button select "Channel L1" as master-channel (it is marked with icon)

enable the separate input mode by pressing "F4" button — "Split Pairs Mode".

The "LINE L1" input shall be set to mode "input", the obtained reflectogram is submitted onto

reference grid in blue color, the channel selector-switch is highlighted with blue color and

indicated the operation mode — "input"

The "LINE L2" input is automatically set to operation mode — "output".

6.3.3 Measurement Subrange Adjustment

It is recommended to select the measurement subrange basing on data on approximate length

of the section to be measured so that the selected subrange can cover it.

Set the measurement subrange as follows below:

select one of the measurement channels "Channel L1" or "Channel L2" as master-channel

by pressing "F11" button (see cl. 6.3.1)

pressing "F5" button, open window "MEASUREMENT" , menu "PARAMETERS"

choose the selector-switch "Scale" by pressing "F6" button

using the buttons and , select the subrange value from 15.625 m to 32 km.

The required measurement subrange will be set.

The device will automatically pick up the appropriate duration of the sounding pulse, which in

turn can be corrected with the use of parameter «Pulse Width».

The reference grid will be calculated and measurements in active channels will start

automatically.

It should be noted, that calculation of reference grid and measuring cursors is performed with

consideration of the propagation factor value, PF, so that the numeric designation of subranges of

the selector-switch "Scale" (15.625 m, 32.125 m, etc.) corresponds to the upper limit of reference

grid only if LRS = 1.499.


________________________________________________________________________

________________________________________________________________________

37

6.3.4 Sounding Pulse Duration Adjustment

The sounding pulse duration should be selected with application of the principle: the lesser is

duration, the more detailed is the obtained reflectogram, but the lesser is actual measurement

distance limit; and vice versa, the greater is duration, the greater is the actual measurement length,

but the less detailed is the obtained reflectogram.

Set the sounding pulse duration, as follows:



open the window "MEASUREMENT" and enable the menu "PARAMETERS"

choose the selector-switch «Pulse Width» by pressing "F7" button

using buttons and select the pulse duration from the range of 10 ns through 50 μs.

The required sounding pulse duration will be set and measurements in active channels will start.

6.3.5 Setting of the Propagation factor value

In order to ensure correct measurements of distances on a specific type of cables, it is

necessary to know its propagation factor value, which can be either measured (see cl. 6.4.3) or set

with reference to the look-up table in "CABLES PF LIBRARY" (see cl. 6.7).

Set the propagation factor value, as follows:


choose the selector-switch "PF" (КУ) or "V/2" by pressing "F8" button

using buttons and , select numeric value of PF within the range of 1.000 through

3.000 (V/2 within the range of 50.0 through 149.9 m/μs)

The required propagation factor value, PF, (V/2) will be set, the reference grid will be calculated

and measurements in the active channel will start automatically.

6.3.6 Averaging Adjustment

In order to reduce asynchronous interferences, averaging per the sounding cluster is used.

The resultant reflectogram averaged per the sounding cluster, is displayed on the screen. A

number of soundings in a cluster is adjusted by parameter "Averaging" and it is set as follows below:




choose the selector-switch "Averaging" by pressing "F9" button


________________________________________________________________________

________________________________________________________________________

38

using buttons and , select the numeric value from the set (1, 2, 4, 8, 16, 32, 128).

The required averaging will be set and measurements in active channels will start. It should be

noted that time interval between two subsequent outputs of the reflectogram on the screen

increases along with building-up of the parameter "Averaging".

6.3.7 Setting of the Gain Ratio

The parameter "Gain" is intended for adjustment of the gain ratio in the device receiving path.

It is recommended to pick up the gain ratio with respect to which line section is of the operator's

interest: the closer or the further one. By means of gain adjustment, the clearest illustration can be

reached primarily in the section of interest.

Set the gain ratio, as follows:




choose the selector-switch "Gain" by pressing "F9" button

using buttons and , select the numeric value from 0 to 255 c.u.

The required gain ratio will be set and measurements in active channels will start.

6.3.8 Adjustment of the Reflectogram Curve Displacement

Set vertical displacement of reflectogram on the reference grid, as follows:


select master-channel by a subsequent pressing of "F11" button

using buttons and , set the required vertical displacement within the range of 200

through +200 pixels, which is displayed in the status bar of the selected channel directly

under reference grid.


________________________________________________________________________

________________________________________________________________________

39

6.3.9 Adjustment of Input Impedance matching

To match the TDR-TA3.7 device input impedance with surge impedance of the cable line under

measurement, it is required to do the following:

open the window "MEASUREMENT"

rotate knob "BALANCE L1" or "BALANCE L2", correspondingly, herewith, the channel input

impedance is displayed by its selector-switch ("Zo") and in the channel status bar directly

under the reference grid ("Imp").

ATTENTION! the minimum value of the amplitude of the re-reflected signal multiple integer

serves as criteria of the best match.

ATTENTION! The surge impedance value, Zo, indicated by the device is estimating only and

depends on correctness of the Zo calibration (see cl. 6.3.18).

6.3.10 Adjustment of the Measurement Sample Spacing

Adjustment of measurement sample spacing in nanoseconds, "dt, ns", (the cursor pitch in

meters with consideration of PF, "dC" (dK) corresponds to which), allows the operator to adjust the

reflectogram detailing degree in any section of interest — stretching and sharpening of reflectogram

around randomly chosen point.

Adjust the reflectogram sample spacing around a random point in the curve, as follows:


set one of the measuring cursor "C1" (К1) or "C2" (К2) using the button , as active

select the desired point in the reflectogram with use of the cursor positioning buttons

and

press button to stretch the curve (reduction of sample spacing, dt) or button to

sharpen the curve ( an increase of sample spacing, dt) in accordance with the Table 4-2

control the sample spacing, "dt", which is indicated in the upper part of the screen.

6.3.11 Setting of mode "Difference"

The device is provided with a special point-to-point Difference mode, which is intended for

suppression of synchronous interferences and analyses of differences of reflectograms. Set the

"Difference" mode, as follows:

open the window "MEASUREMENT", menu "CHANNELS"

select master-channel with use of "F11" button (it will be subtracted from all active channels)

enable the "Difference" mode with use of "F3" button


________________________________________________________________________

________________________________________________________________________

40

observe the unchanged master-channel reflectogram and delta curves for the rest channels

to quit the mode, press "F3" button again.

6.3.12 Setting of mode "CAPTURE"

The device is provided with a special mode for registration of all reflectogram changes for a

random time interval. It is intended for detection of "glitter" defects, i.e. having unstable nature by

time. Set the "CAPTURE" mode, as follows:

open the window "MEASUREMENT", menu "CHANNELS"

press button

check the availability of legend "CAPTURE" in the upper part of the screen

to quit the mode, press again the button or any other button (except , , and ).

It is allowed to perform cursor measurements during the device operation (the cursor control

buttons , , do not interrupt operation of the "CAPTURE" mode)

6.3.13 Adjustment of Propagation Speed Representation Method

The TDR-TA3.7 device is provided with two methods of representation of the electromagnetic

wave propagation speed in a cable line: in the form of a propagation factor value (PF, is often used

in devices made in Russia) and in the form of half propagation speed (V/2, is often used in devices

made abroad). Select the propagation speed representation method, as follows:

open window "DEVICE SETTING" ("F12" button)

select parameter «Propagation parameter type» from the list using buttons and

press "F1" button opposite selector-switch "Edit" (or ) select the desired value from the

pop-up list of possible values with use of buttons and

confirm the selection by pressing button .

6.3.14 Adjustment of Time and Date of the Integrated Calendar

Adjust the integrated device watch (calendar), as follows:


select parameter "Calendar" (Календарь) from the list using buttons and

press "F1" button opposite selector-switch "Edit" (or )


________________________________________________________________________

________________________________________________________________________

41

select the parameter to be edited (day, month, year, hours, minutes, seconds) with use of

buttons and

increase or decrease the selected parameter with use of buttons and

confirm the selection by pressing the button .

6.3.15 Adjustment of the Device Sleep Timer

The TDR-TA3.7 is provided with the option of automatic switch-off of the device power supply

(with saving of settings) in case of idle time (no buttons are pressed). Set the device sleep time

interval, as follows:


select the setting "Automatic switch off" from the list using buttons and


select the desired value (OFF, 2 min., 4 min., 8 min., 32 min., 64 min.) from the popped-up

list with use of buttons and


6.3.16 Setting of the File Name Prefix of Reflectogram

Change the file name prefix, assigned to the reflectogram by saving, as follows:


select the setting "Default file name" from the list using buttons and


select the entering of Cyrillic (selector-switch "Russian" or Latinic (selector-switch "English")

symbol with use of "F1" button

select entering of symbols or figures (selector-switch "А Б В ..." ["A B C ..." — for Latinic

symbols) or "1 2 3 ...") with use of "F2" button

press sequentially the corresponding button on the keyboard, searching through the possible

values, to enter the symbol

press button to delete the symbol

press button to complete editing.


________________________________________________________________________

________________________________________________________________________

42

6.3.17 Reset the User Settings

For programmable reset, do as follows:


press "F3" button — selector-switch "Settings reset"

a pop-up window "Restore the factory setting?" will appear — press button to confirm

restart the TDR-TA3.7 device.

Parameters to be set in the TDR-TA3.7 device by default: "Scale" — 62.3 m, «Pulse Width» — 50

ns, "PF" — 1.50, "Averaging" — 1, "Displacement" — 0, "Gain" — 100.

6.3.18 Selection of Calibration Base

The setting of the impedance of calibration cable.


select the setting "Calibration base" from the list using buttons


using buttons and , select the desired value (within the range of 25 Ω through 500 Ω)

confirm the selection by pressing button .

6.3.19 Selection of the Device Configuration

There are several software configurations, adapted for specific applications provided in the

device.

Select the device configuration, as follows:


select the setting "Device configuration" from the list using buttons and


select configuration from the popped-up list with use of buttons and


ATTENTION! All operations on the device configuration and check shall be performed in

"Standard" configuration


________________________________________________________________________

________________________________________________________________________

43

6.3.20 Adjustment of Line Decay Parameter (configuration "Heat supply networks")

This parameter is used only in the specific configuration "Heat supply networks" and allows to

adjust the attenuation rate of the calculated "alarm curves". The alarm curves in configuration "Heat

supply networks" are submitted onto the reference grid in window "MEASUREMENT" with use of

"F4" button (selector-switch "Threshold curves").

Set the parameter, as follows


select the setting "Line Decay Parameter" from the list using buttons and


select the desired value from the popped-up list with use of buttons and


6.4 Measurement Procedure

6.4.1 Connection of the Device to the Line to Be Measured

WARNING! prior to connecting the line, make sure that there is no voltage in it

DO NOT: perform measurements in lines under voltage.

Connect the device to the line to be measured, as follows:

connect the line to be checked to the slot "LINE L1" or "LINE L2", using connection cable, if

required, included in the delivery package

set operation modes of the measurement channels inputs (see cl. 6.3.1, 6.3.2).

6.4.2 Measurement of the Line under Check

Measure the length of the line under check, as follows:

set the required parameters for the device (see cl. 6.3.1 – 6.3.10)

connect the device to the line under check (see cl. 6.4.1)

perform analysis of the reflectogram curve of the line under check (see cl. 4.2, 6.5)

using the button , enable cursor "C1" or cursor "C2"

using buttons and set the cursor at the beginning of the front of response from

irregularity (positive response means that the checked line is open at the further end,

negative response means that the checked line is closed at the further end)


________________________________________________________________________

________________________________________________________________________

44

determine the distance per the numeric value next to the legend "C1" ("C2" ) in the upper

part of the screen directly above the reference grid.

ATTENTION! To provide the correct interpretation of the result, it is required to set the propagation

factor value, which corresponds to the cable brand of the line to be checked.

ATTENTION! When connecting the line to be measured to the device by means of connection

cables, their lengths should be considered by determination of the distance value.

ATTENTION! The most accurate setting of the cursor to the front of response from irregularity can

be reached by using adjustment of sample spacing (see cl. 6.3.10).

6.4.3 Measurement of the Propagation factor value by Known Length of Line

Measure the propagation factor value by known length of the line, as follows:

set the required parameters for the device (see cl. 6.3.1 – 6.3.10)



using the button , enable cursor "C1" or cursor "C2"

using buttons and set the cursor at the beginning of the front of response from

irregularity (positive response means that the checked line is open at the further end,

negative response means that the checked line is closed at the further end)

pick-up the numeric value of the propagation factor value (see cl. 6.3.5), observing the

distance, reflected by the measuring cursor so that its readings match with the known length

of the measured line.

ATTENTION! When connecting the line to be measured to the device by means of connection

cables, their lengths should be considered by determination of the distance value.

6.4.4 Measurement of Distance to an Irregularity of the Checked Line

To determine the distance to the irregularity of the line under measurement, the

instructions, described in cl. 6.4.2 should be used.

To analyze the irregularity nature, the instruction, described in cl. 4.2 and 6.5 should be

used.

Determine the distance between two irregularities of the checked line, as follows:

perform the required settings of the device (see cl. 6.3.1 – 6.3.10)



using the button , enable cursor "C1"


________________________________________________________________________

________________________________________________________________________

45

using buttons and , set cursor "C1" to the beginning of front of response from the first

irregularity

using the button , enable cursor "C2"

using buttons and , set cursor "C2" to the beginning of front of response from the

second irregularity

determine the distance per the numeric value next to the legend "L =" in the upper part of the

screen directly above the reference grid.

6.5 Analysis of Typical Irregularities of the Checked Line

NOTE to Figures 6-1–6-5: the checked line is outlined in the upper part and reflectogram of

this line is displayed in the lower part.

6.5.1 Determination of Distances to Couplings, Twist Joints, and Interruptions

Reflection from the irregularity, typical for the cable twist joints, is expressed by the presence

of positive polarity. The quality of the cable twist joint can be inferred by the size of the reflected

response. The reflectometer allows to differ several discrete irregularities. The reflected positive

polarity pulse, indicating the presence of connection in the cable line, is observed in the cursor

position 1. Connection in the cursor position 2 is performed less well than previous connection. The

reflected pulse in the cursor position 3 indicates the interruption (end) of the cable line.

Figure 6-1 Couplings, Twist Joints, Interruption

6.5.2 Determination of Distance to Short Circuit Between Cores

Reflection from the irregularity, typical for the cable cores short circuit, is expressed by the

presence of negative polarity response. The reflected negative polarity pulse, indicating the presence

of short circuit in the cable line, is observed in the cursor position 1. There is no pulse, reflected from

the cable line end.


________________________________________________________________________

________________________________________________________________________

46

Figure 6-2 Short Circuit

6.5.3 Determination of the Distance to "Soaked" Section of Cable

The irregularity, associated with the occurrence of moisture in the cable core, is stretched by

its nature. The "soaked" section is defined by reduced impedance and random value of the dielectric

capacitance of cable insulation, and, consequently, by unknown PF value. On the reflectogram, the

section is started in the cursor position 1 and ends in the cursor position 2.

Figure 6-3 "Soaked" Section


________________________________________________________________________

________________________________________________________________________

47

6.5.4 Determination of the Distance to Parallel Branch Conductor

The irregularity, associated with the presence of branch conductors, is also stretched by its

nature. By the reflectogram type, the branch conductor looks like the cable soaking. The difference

is that the branch conductor is presented by a uniform section. To determine the distance to the

place of branch conductor, it is required to set the cursor to the beginning of the irregularity. If the

branch conductor length exceeds the length of the rest section of cable, complete disappearance of

the pulse, reflected from the cable end. The reflected pulse, by its shape indicating the presence of

parallel branch conductor in the cable line, is observed in the cursor position 1.

Figure 6-4 Branch Conductor

6.5.5 Determination of "Split Pairs Mode"

"Split Pairs Mode" is caused by violation of the cable laying procedure, confusion of pair twist

joints in couplings and switchboards. To determine the distance to coupling, where the "split pairs"

is, it is required to connect one pair to the device output and other — to the device input. Herewith,

the almost complete disappearance of the input pulse will be observed, and in the place of "split

pairs" — response with negative polarity.

Figure 6-5 "Split Pairs Mode"


________________________________________________________________________

________________________________________________________________________

48

The term "Split Pairs" is related to multi-pair communication, signaling and control cables.

The reflected pulse, typical for pair distortion, is observed in the cursor position 1.

The reflected pulse, indicating the repeated pair distortion, is observed in the cursor position 2.

The reflected pulse in the cursor position 3 specifies the cable interruption (end).

6.6 Use of the Device Reflectograms Library

6.6.1 Saving of Reflectogram in the Reflectograms Libraries.

Record the reflectogram in the library (into the non-volatile memory of the device), as follows:

obtain the reflectogram with the required parameters, using window "MEASUREMENT"

select the channel with the desired reflectogram, as master-channel

press button

in the popped-up window: "Save the Channel x reflectogram? This can take some time. -

confirm the action by pressing the button

the device automatically shifts to the window "WAVEFORMS LIBRARY"

edit the reflectogram file name to be saved in the memory (similarly as in cl. 6.3.16); finish

editing by pressing the button

close the window "WAVEFORMS LIBRARY" by pressing "F5" button — «EXIT».

The time domain reflectogram TDR-TA3.7 saves the reflectogram with the following measurement

parameters:

measurement subrange (parameter "Scale")

sounding pulse duration (parameter «Pulse Width»)

input signal gain (parameter "Gain")

BALANCEing of output impedance

propagation factor value (parameter "PF")

averaging ratio (parameter "Averaging")

data and time of recording to the memory.

6.6.2 Screen-shot of Window "MEASUREMENT"

The device is provided with an option to get screenshots of window "MEASUREMENT" in

jpg format. The screen-shot is saved as a file the non-volatile memory of the device. The screen-

shot files are not displayed in the reflectogram library, but it can be exported to an external storage

medium together with the reflectogram memory (see cl. 6.6.6). Make screen-shot, as follows:


________________________________________________________________________

________________________________________________________________________

49


press button

confirm the action in the popped-up window "Save the screen-shot?" by pressing the button

.

6.6.3 Reflectogram Memory (Waveforms Library) Recall

The TDR-TA3.7 device allows displaying up to three reflectograms from the device memory

at once. Herewith, a simultaneous handling with data, coming from the measurement inputs, is

possible.

Any reflectogram from the library can be loaded to one of the storage memory (selector-

switches "File" in the window "MEASUREMENT", menu "CHANNELS"). Binding of reflectogram to

the storage channel automatically assigns it master-channel (selector-switch is marked with icon ).

The reference grid gets automatically customized with reference to the master-channel scale,

in order to provide correct input of several reflectograms at once. Also the sounding parameters for

measurement channels ("Channel L1" and "Channel L2" get synchronized with the master-channel.

When performing repeated measurements, such synchronization allows quickly to set the sounding

parameters with reference to the standard reflectogram (from the memory).

Load reflectogram from the library to the storage channel, as follows:

open the window "WAVEFORMS LIBRARY"

select the required reflectogram from the library with use of buttons and

using buttons "F8"–"F10" (selector-switches "File" of the storage channels), load the

reflectogram from the library to the storage channel, herewith the channel selector-switch is

activated in the corresponding colour, and the reflectogram is submitted to the reference grid

in the same colour; the selected storage channel is automatically assigned as master-

channel (the selector-switch is marked with icon ).

to quit from the window "WAVEFORMS LIBRARY" to the window "MEASUREMENT", press

"F5" button opposite the selector-switch «EXIT» or button .

6.6.4 Deleting a Reflectogram from the Memory (Waveforms Library)

Delete a reflectogram from the memory, as follows:


select a reflectogram from the library with use of buttons and


________________________________________________________________________

________________________________________________________________________

50

press "F3" button opposite selector-switch "Delete"

in the popped-up window: "Delete the SELECTED reflectogram from the memory?" - confirm

the action by pressing the button



6.6.5 Cleaning of the Waveforms Library

Delete all reflectograms from the memory, as follows:


press "F4" button opposite selector-switch "Delete all"

in the popped-up window: "Delete the ALL reflectograms from the memory?" - confirm the

action by pressing the button



6.6.6 Exporting of Waveforms Library to an External Storage Medium

Copy the reflectogram library from the device TDR-TA3.7 memory to an external storage

medium (USB-Flash), as follows:


insert the external storage medium of USB-Flash type into USB-A port (see cl. 4.5)

wait until the device identifies the storage medium (LED flashes on the medium)

press "F6" button opposite selector-switch "Export WAVEFORMS LIBRARY"

on completion of copying, the following window pops-up on the TDR-TA3.7 device screen:

"WAVEFORMS LIBRARY is successfully exported to the folder (specification of the path to

the folder)" — now the storage medium can be removed from the USB-A port and the window

can be closed by pressing a button

to quit from the window "DEVICE SETTING", press the "F5" button opposite the selector-

switch «EXIT» or button , herewith, the TDR-TA3.7 device automatically shifts to window

"MEASUREMENT".


________________________________________________________________________

________________________________________________________________________

51

6.6.7 Importing of Waveforms Library from External Storage Medium

Copy reflectograms from an external storage medium (USB-Flash) to the TDR-TA3.7 device, as

follows:




press "F7" button opposite selector-switch "Import of WAVEFORMS LIBRARY

an import window, where all folders of directory \Ersted\ on the external storage medium are

displayed, will open

select a folder for import using buttons and

press button , the following window pops-up on the screen of the TDR-TA3.7 device: "You

are going to import the library instead of existing one. Do want to export the existing library

first?"

o confirm the action (creation of reserve copy) by pressing the button . Herewith,

the existing library is preliminary reserved on an external storage medium, and only

after it the reflectogram library is replaced with the library from the external storage

medium

o by pressing the button , the existing reflectogram library will be replaced with the

library from an external storage medium without back-up


"WAVEFORMS LIBRARY is successfully imported" — now the storage medium can be

removed from the USB-A port and the window can be closed by pressing a button



"MEASUREMENT".

ATTENTION! the reflectogram libraries can be imported only from directory \Ersted\ on the

external storage medium.

6.7 Use of the Device Propagation factor value Library

6.7.1 Setting of the Cable Propagation factor value (PF) from the Library

Set the values of the cable propagation factor value from the library of the propagation factor value,

as follows:


________________________________________________________________________

________________________________________________________________________

52

open the window "CABLES PF LIBRARY"

select the required cable with use of buttons and

press "F6" button opposite selector-switch "Set"

in the popped-up window: "Set PF = ... ?" - confirm the action by pressing the button ,

herewith the device will automatically shift to window "MEASUREMENT".

6.7.2 Adding to the Cable Propagation factor value (PF) to the Library

Add the cable propagation factor value to the library, as follows:


press the "F8" button opposite the selector-switch "Add PF to the library"

enter the cable brand description (similarly as per cl. 6.3.16) in the column "Cable brand"

press , herewith the column "Value" is highlighted

set the desired value of the propagation factor value with use of button and

press , herewith a new propagation factor value is added to the table

to quit from the menu "CABLES PF LIBRARY", press the "F5" button opposite the selector-

switch «EXIT» or button , herewith, the device automatically shifts to window

"MEASUREMENT" .

6.7.3 Deleting of the Cable Propagation factor value (PF) from the Library

Delete the cable propagation factor value from the library, as follows:


select the entry, you want to delete, using buttons and

press "F3" button opposite selector-switch "Delete"

in the popped-up window: "Delete PF from the library?" - confirm the action by pressing the

button .

6.7.4 Cleaning of the Propagation factor value Library

Delete all cables propagation factor values from the library, as follows:


press "F4" button opposite selector-switch "Delete all"


________________________________________________________________________

________________________________________________________________________

53

in the popped-up window: "Clean the CABLES PF LIBRARY?" - confirm the action by

pressing the button .

6.7.5 Exporting of the Propagation factor value Library to an External Storage Medium

Copy the propagation factor value library from the device TDR-TA3.7 memory to an external

storage medium (USB-Flash), as follows:




press "F8" button opposite selector-switch "Export of CABLES PF LIBRARY"

on completion of copying, the following window pops-up on the device screen: "CABLES PF

LIBRARY is successfully exported to the folder (specification of the path to the folder)" —

now the storage medium can be removed from the USB-A port and the window can be closed

by pressing a button



"MEASUREMENT".

6.7.6 Importing of Propagation factor value Library from External Storage Medium

Copy propagation factor values from an external storage medium (USB-Flash) to the TDR-

TA3.7 device, as follows:




press "F9" button opposite selector-switch "Import of CABLES PF LIBRARY

select the required folder with use of buttons and

press button , the following window pops-up on the screen of the TDR-TA3.7 device: "You

are going to import the library instead of existing one. Do want to export the existing library

first?"

o confirm the action (creation of reserve copy) by pressing the button . Herewith,

the existing library is preliminary reserved on an external storage medium, and only


________________________________________________________________________

________________________________________________________________________

54

after it the propagation factor value library is replaced with the library from the external

storage medium

o by pressing the button , the existing propagation factor value library will be

replaced with the library from an external storage medium without back-up


"CABLES PF LIBRARY is successfully imported" — now the storage medium can be

removed from the USB-A port and the window can be closed by pressing a button

to quit from the menu "DEVICE SETTING", press the "F5" button opposite the selector-switch

«EXIT» or button , herewith, the TDR-TA3.7 device automatically shifts to window

"MEASUREMENT".

ATTENTION! import of the propagation factor value library is available only, if full path to the

folder with PF (including folder name), which is automatically assigned to it by "Export of the

CABLES PF LIBRARY" (see cl. 6.7.5), is saved unchanged.

6.8 Battery State Control

The state of the integrated battery in the TDR-TA3.7 device is controlled per the icon in the

top right corner of the screen:

symbol " " means, that the battery charging level is normal

symbol " " means, that the battery recharging is required.

6.9 Operation of the TDR-TA3.7 from Recharger

The TDR-TA3.7 can operate from two types of recharger: ES25E12-120 (included in the

delivery package) and PSU40A-3 (supplied optionally).

When the recharger is connected to slot "DC IN 12 V", the TDR-TA3.7 device shifts to the

mode of operation from mains adapter with the simultaneous charging of the integrated battery. The

charging process is indicated by a red LED " DC IN 12 V " and icon " " the top right corner of

the screen. On completion of charging, the LED " DC IN 12 V " lights up in green, and icon " "

is displayed in the top right corner of the screen.

6.10 Updating of the TDR-TA3.7 Software

The TDR-TA3.7 device is provided with the possibility to update the software. The current

software version of the device is displayed in the information window: "About this device".

Update the software, as follows:


________________________________________________________________________

________________________________________________________________________

55

insert the USB-Flash drive into the PC USB-port

unpack the archive with the device weave in the USB-Flash drive

make sure that the path to the weave is located in the disk root folder (<disk

root>/Ersted/tdr307/)

remove the USB-Flash drive from PC

switch OFF the TDR-TA3.7 device

insert the USB-Flash drive into the TDR-TA3.7 USB-port

switch ON the TDR-TA3.7 device

in the device weave version differs from the weave version on the USB-Flash drive, the TDR-

TA3.7 device will perform the software update, herewith, the legend: "Weave update is in

process. Wait until the process ends." will appear on the screen

wait, when the legend: "Update is successfully finished", will appear on the screen

device is ready for measurements.

6.11 Switch OFF the TDR-TA3.7 Device

To switch the device OFF, press and hold the button for one second. The device is

provided with the option of automatic power supply OFF (no buttons are pressed) (see cl. 6.3.15).

ATTENTION! When the TDR-TA3.7 device is switched off with use of the button , all

measurement parameters are automatically saved.


________________________________________________________________________

________________________________________________________________________

56

7 Possible Faults and their Remedies

7.1 If any failures are detected by the TDR-TA3.7 device operation, contact with the manufacturer

only.

Address: Office 6, 10A (bl.2),1-Vladimirovskaya Str, Moscow, 111123, Russia

7.2 If during operation of the TDR-TA3.7 device there are program failures, and it is not possible

to switch it OFF with button , press button (power reset), using a long and sharp object

(unbent paper clip) to perform the forced switching off of the device.

ATTENTION! When the TDR-TA3.7 device is switched off with button , the changes,

applied to the measurement parameters in the current operation cycle of the device, are not saved.


________________________________________________________________________

________________________________________________________________________

57

8 Maintenance

8.1 The TDR-TA3.7 device does not require any special maintenance. Soap solution or alcohol

shall be used for removing any impurities from the device case. It is strictly forbidden to use any

aggressive chemicals (gasoline, acetone, solvents for paints).

8.2 Battery with a rated voltage of (7.2± 0.7) V, 6.6 Ah is used in the TDR-TA3.7 device as an

integrated power supply source. The batteries are lithium-ion, hermetic and non-serviceable during

the whole service life.

When temperature reduces, the battery capacity is decreased (60% at a temperature of

minus 20°C). Prior to start operation, it is required to check the battery state. The indicator in the top

right corner of the screen can evaluate the battery state. The check results are approximate (since

the battery state strongly depends on ambient temperature), but allow to evaluate its possible

operation time without recharging.

8.3 Recharge the battery in the following sequence:

connect the recharger to mains of 220 B 50 Hz

connect the recharger jack plug into the device slot "DC IN 12 V" monitor the recharging

process

WARNING! Recharge the battery using only that recharger, which is included in the delivery

package. Do not charge the battery at the ambient air temperature below 0°C.

ATTENTION! Recharging of completely discharge the battery in the TDR-TA3.7 device takes 8 hours

maximum.


________________________________________________________________________

________________________________________________________________________

58

9 Transportation and Storage

9.1 The TDR-TA3.7 device, packed in boxes, shall be transported in closed-type transport

vehicles of any art, to any distances, and shall be stored, as specified by the group 4 as per GOST

22261. When transporting by air, the TDR-TA3.7 devices shall be located in the heated sealed

compartments.

Cargo arrangement and fastening in transport vehicles shall provide the stable position of the

cargo during transportation.

Cargo displacement during transportation is not allowed.

9.2 The rail carriages, containers, car bodies to be used for transportation of the TDR-TA3.7

device shall not have any signs of handling of concrete, coal, chemicals, etc.


________________________________________________________________________

________________________________________________________________________

59

10 Marking

10.1 The TDR-TA3.7 device has marking, containing:

manufacturer trademark

the device reference designation — TDR-TA3.7

symbol of the instrument type approval

serial number.

10.2 Designations of control elements shall be applied on the TDR-TA3.7 device.

10.3 The TDR-TA3.7 device shall be marked in accordance with design documentation.


________________________________________________________________________

________________________________________________________________________

60

11 Acceptance Certificate

Cable fault locator TDR-TA3.7, serial number ___________ corresponds to the specifications

and is qualified for operation.

Date of issue "____"______________ 20___

L.S.

Enterprise representative __________________ _______________________

(signature) (Full name)

Basing on the results of initial verification, cable fault locator TDR-TA3.7 is qualified for

operation.

Date of verification "____"__________________ 20___

Signature of Verification Officer: ________________ _________________________

(Full name

L.S.


________________________________________________________________________

________________________________________________________________________

61

12 Data on Preservation and Packing

12.1 Preservation Certificate

Cable fault locator TDR-TA3.7, serial number ________________ as been preserved in

accordance with the requirements of the packing and preservation guide.

Date of preservation: "____"_____________20___

Preservation period:

Preserved by: __________________ ____________________


Article after preservation has been accepted by:

______________ _____________


L.S.

12.2 Packing Certificate

Cable fault locator TDR-TA3.7, serial number ________________ has been packed in the

manufacturing plant in accordance with the requirements set by the packing and preservation guide.

Date of packing: "____"_____________20___

Packed by: __________________ ____________________


Article after packing has been accepted by:

_____________ ___________________


L.S.


________________________________________________________________________

________________________________________________________________________

62

13 Warranty Statement

13.1 The manufacturer warrants the compliance of the TDR-TA3.7 device with the requirements

of specifications provided that the user ensures operation, transportation, and storage conditions,

set by this Manual.

13.2 The warranty operation period is set to 12 months from the date of the TDR-TA3.7

commissioning, but not longer than 18 months from the date of its manufacture.

13.3 The warranty storage period is set to 6 months from the date of the TDR-TA3.7 device

manufacture.

13.4 The manufacturer shall free of charges eliminate all detected defects and replace failed

components of the TDR-TA3.7 device or the TDR-TA3.7 device, as a whole, if it not possible to fix it

at the user's enterprise, during the warranty period.

13.5 The warranty statement does not cover the battery, delivered together with the device.

13.6 When the warranty period expires, the TDR-TA3.7 device shall be repaired under the

guidance of Section "Possible Faults and their Remedies" in this Manual.

For warranty and post-warranty service, contact the manufacturer at:

Office 6, 10A (bl.2),1-Vladimirovskaya Str, Moscow, 111123, Russia

Phone: +7 (495) 212-11-74

e-mail: [email protected]


________________________________________________________________________

________________________________________________________________________

63

14 Notice of Faults

14.1 All observed faults should be recorded in Table 15-1.

Table 14-1

Date Number of the TDR-

TA3.7 device operation

hours from

commissioning to the

fault occurrence

Brief description

of fault

Date of

sending the

Notice and the

letter

reference

number

Measures

were taken

with regard to

Notice

Note


________________________________________________________________________

________________________________________________________________________

64

Revision History

Revision

number

Sheet number (page) Document

number

Signa-

ture

Revision

applica-

tion date

Revision

introduc-

tion date

chan-

ged

repla-

ced

new with-

drawn

cable fault locator tdr-ta3

Documents