model pm-616 two-color pyrometer operator’s manual revision...

Model PM-616 Two-Color Pyrometer

Operator’s Manual

Revision 1.2

Logika Technologies Inc.

2857 Sherwood Heights Dr. Unit 2

Oakville ON, CanadaL6J 7J9

Tel: 905-829-5841

www.logikatech.com

Web: www.logikatech.com Phone: 905-829-5841 Fax: 905-829-8787 Email: [email protected]

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Logika Technologies PM-616 Two-color Pyrometer Operator’s Manual Rev. 1.2 Feb-13

1 INTRODUCTION .................................................................................................. 2

2 DESCRIPTION ...................................................................................................... 2

2.1 MODEL NOMENCLATURE ................................................................................................................. 2

2.2 OPERATING PRINCIPLE ..................................................................................................................... 3

2.3 SPECIFICATIONS.............................................................................................................................. 3

3 LOCATION AND MOUNTING ............................................................................... 5

3.1 PYROMETER LOCATION .................................................................................................................... 5

3.2 PYROMETER MOUNTING .................................................................................................................. 7

3.3 LENS WITH FIBER OPTIC CABLE........................................................................................................... 7

4 UTILITY CONNECTIONS ....................................................................................... 8

4.1 ELECTRICAL CONNECTIONS ............................................................................................................... 8

4.2 WATER COOLING CONNECTION ......................................................................................................... 9

4.3 PURGE AIR CONNECTION ............................................................................................................... 10

5 OPERATION ...................................................................................................... 11

5.1 CONTROLS .................................................................................................................................. 11

5.2 SET MENU FUNCTIONS AND PROGRAMMING ..................................................................................... 11

Set Menu 1- Emissivity/Slope Adjustment ................................................................................ 12

Set Menu 2- Display Mode ........................................................................................................ 17

Set Menu 3– Output Signal Integration Time ........................................................................... 19

Set Menu 4-, 5-, 6- Process Alarm Settings ............................................................................... 20

Set Menu 7-, 8- Current/Voltage Analog Output Span Settings ............................................... 20

Set Menu 9- Aiming Laser Setup ............................................................................................... 21

Display Menu 10- Enclosure Temperature ............................................................................... 21

Display Menu 11- Two Color Ratio ............................................................................................. 22

Set Menu 12- Zero Compensation Gain ................................................................................... 22

Set Menu 13- Two-color mode signal attenuation ratio ........................................................... 22

5.3 DEBUGGING ................................................................................................................................ 24

6 MAINTENANCE ................................................................................................. 26

6.1 REGULAR MAINTENANCE ............................................................................................................... 26

6.2 INSTRUMENT RETURN ................................................................................................................... 26

7 APPENDIX ......................................................................................................... 27


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Logika Technologies PM-616 Two-color Pyrometer Operator’s Manual Rev 1.2 Feb-13

1 Introduction

PM-616 two-color infrared pyrometer is primarily used in the metallurgical industry to

measure temperature of steel or molten iron, wire rod, hot rolled steel, as well as cement kilns.

The pyrometer can “look” into a process and measure the target temperature from a distance,

providing an accurate reading while eliminating problems associated with contact measuring

devices. Dual infrared wavelengths input signals overcome application challenges such as

small targets, variable emissivity, dust, water or other interfering media between the target

and the pyrometer. Accurate temperatures are obtained even when the target is 95%

obstructed.

PM-616 pyrometer also has a fiber optic option to utilize in applications with high

electromagnetic interference or high temperatures. The lens and fiber optic cable can

withstand up to 300°C with air purge connected.

2 Description

2.1 Model Nomenclature

PM- 6 16 - FOC- 024

Logika two color infrared pyrometer

Lower limit temperature 600°C

Upper limit temperature 1600°C

Lens with fiber optic cableLeave blank for standard lens

Input power supply 24VDC

Figure 2.1 PM-616 Model Nomenclature


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2.2 Operating Principle

Logika PM-616 pyrometer uses a state-of-the-art photodiode to sense the infrared energy

from the target. Our pyrometer measures infrared energy emitted by the target at two

wavelengths and calculates the ratio of these measurements to determine the target

temperature. Since the emissivity of the two wavelengths is identical in same environment, it

does not influence the accuracy of the temperature measurement.

The primary advantage of PM-616 over thermocouple temperature measurement is that the

pyrometer accurately measures the target temperature by way of non contact means and

responses much faster.

Compared with single wavelength pyrometers, the advantages of the Logika PM-616 two-color

pyrometer are:

1. Overcomes optical fouling or interfering media between the target and the pyrometer,

such as dust, dirt, smoke, and water vapor, to yield accurate temperatures.

2. Automatically compensates for changes in target emissivity or varying distances between

the target and pyrometer.

3. Almost no restrictions to pyrometer’s field of view, leaving more flexibility for pyrometer

mounting. The PM-616 can accurately measure the target temperature even with as little

as 5% of the field of view.

4. PM-616 can also switch to single color mode for special field applications.

The PM-616 also has built-in temperature slope adjustment for calibrating the pyrometer to

the specific characteristics of the target metallurgy, and a visible target aiming laser for easy

installation. See Section 5.2.

2.3 Specifications

Power Input 24 VDC ±10% @ 210 mA

Power loss

protection

Reinstates all previous setup parameters when power is restored

Wavelength

One-color mode: 0.75-1.1μm

Two-color mode: 0.75-1.1μm and 1.1μm

Response time Adjustable – the fastest response time is 20 ms


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Accuracy ±(0.5% x Measured temperature+1°C)

Repeatability ±0.1% Full Scale

Operating

temperature

No water cooling: -20˚C to +55˚C (-4˚F to +130˚F).

With water cooling: -20˚ C to 120˚C (-4˚F to 250˚F)

Fiber optic lens: -20˚C to +300˚C (-4˚F to +570˚F).

Humidity Relative humidity range: 10-95%

Measuring Range 600-1600˚C (1112˚F to 2912˚F)

Field of View

One-color mode: D/S=50:1 for standard and FOC pyrometers.

D is the distance between the infrared pyrometer and the target

S is the target diameter. See Figure 3.1 for more details.

Two-color mode: No restriction to the field of view. The target size

can be much smaller. If temperature is greater than 900°C, the

maximum signal attenuation ratio can be 95%.

Display mode: 4 digit LEDs. Display peak, valley, average or real time optional

Focus range 0.5m- ∞

Calibration

coefficient

Two color mode: Temperature slope, 0.850 - 1.150. Adjustable in

0.001 increments (0.001↑results in 1.4°C ↓).

One color mode: Emissivity rate, 0.10-1.00 adjustable in 0.01

increments (0.01↑ results in 1.0°C ↓).

Alarms output:

High or low process temperature alarm, rated 0.2A at 220 VAC,

0.5A at 30 VDC, MOS relay output.

Ambient temperature high or low alarm

Analog output

Linear 4-20 mA (or 0-20mA) proportional to temperature

Linear 0-10VDC proportional to temperature

Aiming method Visible aiming laser for standard PM-616

Warm up time 10 minutes


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Housing

Hermetically sealed stainless steel enclosure rated IP66, includes

purge air and cooling water connections.

Optional fiber optic lens assembly includes air purge fitting.

Size 370mm L X 100mm W X 190mm H (14.5” L X 4” W X 7.5” H)

Weight 4 kg (8.8 Lbs)

3 Location and Mounting

3.1 Pyrometer Location

Basic installation considerations:

• Pyrometer should not be installed above heat sources, also avoid directly exposure to

water vapor, excessive dust or smoke. If harsh ambient environment is unavoidable,

connect clean, dry air to the air purge fitting on the pyrometer enclosure. Heat

shielding or fan can also be applied to dissipate water vapor or smoke.

• If conditions allow, mount the pyrometer as close to the target as possible. This will

supply enough infrared energy for the pyrometer to provide strong signal. At the same

time, the pyrometer must be kept far enough to protect it from being over heated.

• Installation distance: depends on color mode selected.

o One-color mode: target should be covered by the pyrometer’s field of view.

Check Figure 3.1 and Figure 3.2 for reference.

o Two-color mode: no restrictions to field of view.

For example:

If the target diameter is 20mm, pyrometer Displacement Coefficient is 50:1

(D/S=50:1).

In one-color mode, according to Figure3.1 and Figure3.2, the pyrometer has to be

installed less than 1 meter away from the target.

In two-color mode, it is not necessary for the target to be totally covered by the field

of view, the pyrometer can be installed more than 1 meter away from the target.

• Maximum ambient temperature for the pyrometer

o 50oC (122

oF) without water cooling

o 120oC (250

oF) with water cooling connected. See Figure 4.2


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Figure 3.1: One color mode Pyrometer Field of View

Target is larger Target is equal Target is smaller

Ideal Acceptable Not Acceptable

PM Series

Field ofView

Figure 3.2 One-Color Mode Pyrometer Ideal Target Size


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3.2 Pyrometer Mounting

Installation – PM-616 has an adjustable mounting foot which is secured using a M10 bolt.

Aiming - For standard pyrometer, use the aiming laser to properly align the pyrometer with

target.

3.3 Lens with Fiber optic cable

Install the lens with supplied mounting bracket. Check the section 3.1 for installation

considerations. The maximum ambient temperature for the lens and fiber optic cable

assembly is 300oC (570

oF). Use a laser pen for alignment, see Figure 3.3. The laser spot on the

target is for the pyrometer to receive the radiation energy and calculate the temperature,

make sure the spot area is flat and no sharp edge.

Figure3.3 Lens with Fiber optic cable Setup


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4 Utility Connections

4.1 Electrical Connections

All electrical connections (power and signal) are made via a 12-pin connector and mating cable

for the junction box connections.

Cable Specification

Standard cable length is 2.0 meters; minimum bent radius for cable is 30mm. Other cable

lengths are available from Logika Technologies Inc. upon request.

Function Wire color Pin assignment

DC Power Brown (1) +24VDC

input Red (2) 0VDC

Analog Orange (3) 0-10VDC

Output Yellow (4) 4-20mA

Green (5) Analog Common

Static Blue (6) 24VDC output on

PNP Upper limit alarm

output Pin2(red) as 0VDC

Max Load 100mA

Upper limit Purple (7) Closed=Alarm

Relay Gray (8)

Lower Limit White (9) Closed=Alarm

Relay Black (10)

Pyrometer Connector

Outside ViewShielded TEFLON, 10 Conductor - 24AWG - 2.0M

One end: Binder 423 Series 12 pin female, PN 9951304012

The other end: terminal pins

Binder 723 series 12 pin maleconnector, PN: 0901310012

Cable Assembly

Figure 4.1 Pyrometer connector and Cable assignment

Junction Box Wiring

Please see the Table 4.1, Appendix Figure 7.4 and Figure 7.5 for pyrometer wiring terminal

description. The supplied cable should be connected directly to the terminals of a junction box.

Junction box is shielded and connected to ground to eliminate electrical noise, preventing

triggering false detection. Any unused output wires must have insulation protection or be

connected to a free terminal in junction box.

For Junction Box with AC-DC converter: AC Input 85V-265VAC, connect to L, N, E


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Cable No. Color Function Junction Box

Number

Junction Box

Name

1 Brown +24VDC 1 +24V

2 Red 0V 2 0V

3 Orange Analog 0-10V Output 3 0-10V

4 Yellow Analog 4-20mA Output 4 mA

5 Green Analog Output Common 5 GND

6 Blue PNP output (Upper limit )alarm) 6 PNP

7 Purple Upper limit alarm closed=Alarm 7 Upper

8 Gray Upper limit alarm Common 8 Upper

9 White Lower limit alarm closed=Alarm 9 Lower

10 Black Lower limit alarm Common 10 Lower

Table 4.1 Cable Terminal Wiring Description

4.2 Water Cooling Connection

General description

Water cooling is required when the ambient temperature is higher than 50oC (122

oF) to

protect electronics inside pyrometer tube from overheating, the connectors are two Φ10mm

OD barbed fittings on the enclosure. Stainless steel heat exchanger tubing is embedded in

the housing for efficient heat removal using circulating water.

Cooling Water Requirements

• Clean industrial water

• Maximum water inlet temperature 25oC (77

oF)

• Maximum water pressure of 4 bars (58 PSI).

• Water flow rate - 1 to 2 L/min (0.26 to 0.53 gal/min)

Connections

• Use Φ10mm ID or 3/8” ID hose for connections

• One fitting is connected to plant’s water supply

• The other one is connected to drain

• Both fittings should be secured with hose clamps

• Setup the cooling water flow rate by Figure 4.2


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Am

bie

nt

Te

mp

era

atu

re

60

80

100

120

140

160

°C

Water0.3 0.5 1.0 1.5 2.0 L/M

8 °C

20 °C

25°C

Figure 4.2 Ambient Temperatures vs. Water Flow Rate

4.3 Purge Air Connection

Description- Compressed plant air can be used to protect the lens from dust and vapor. Purge

air cleans the lens, reduces maintenance times, and prolongs pyrometer’s life in where dusty

or corrosive vapor is present.

Purge Air Requirements

• Must be clean, dry instrument air no oil, dust and contaminants included. Poor air quality

will result in dirty lens and decrease pyrometer performance. If the quality of compressed

air can’t be guaranteed, it should not be connected to avoid lens contamination and affect

the pyrometer performance.

• Air filtration prior to the inlet fitting is recommended to improve the quality of purge air

• Air Pressure range from 50 to 200 g/cm2

(0.7 psi to 2.8 psi)

• Air Flow rate from 4 to 16 L/min (0.14 to 0.56 ft3/min)

Connection- Connect the plant air source to the purge air barbed fitting on the sensor’s lens

shroud with Φ10mm ID (or 3/8” ID) hose. Purge air flows out of the sensor shroud and

dissipates into the ambient environment.


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5 Operation

5.1 Controls

PM-616 control panel is located at the rear of the pyrometer. The various functions are

described in greater detail below.

To reach control panel:

• Use M2.5 Allen key to remove the back cover from unit

• Unthread the glass cover on the pyrometer body by turning it counterclockwise

!!! When operating on the control panel, please note:

o The pyrometer tube may slide out of cooling tube if angled downwards. Keep unit level

when disassembling for menu adjustment.

o The pyrometer tube is sealed during manufacturing to retain accuracy and quality.

Warranty is void if pyrometer tube is dismantled for any reason.

5.2 Set Menu Functions and Programming

In display mode:

Press to switch between one-color and two-color mode

Press ▲ to switch temperature display between °F and °C

1 2 3 4 5 6

78910111213

Figure5.1 Keypad setup sequence

Press SET repeatedly to choose setup parameters

Press ENTER to display current value

Use the arrow key to change the value


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Press ENTER again to save the new value and EXIT setup

Set Menu 1- Emissivity/Slope Adjustment

One-color mode: Emissivity setup value

Emissivity: The relative ability of target measured surface to emit energy by radiation. It is the

ratio of energy radiated by a particular material to energy radiated by a black body at the same

temperature. A true black body would have an emissivity = 1 while any real object would have

emissivity < 1.

By adjusting the emissivity, the pyrometer can accurately measure target temperatures. If the

target’s emissivity is setup higher than its true value, the measured temperature by pyrometer

will be lower than the actual temperature.

The emissivity data in the table below is for reference only. Material surface finish can cause

varying emissivity. If the metal surface is slightly oxidized and dirty, its emissivity will drop

significantly.

Table 5.1 One-color emissivity table for different materials

Material and status Temperature

range(°C)

Emissivity (wavelength

close to 1μm)

Steel:

Polished not oxidized

Polished slightly oxidized

Rough machined, not oxidized

Rough machined, slightly oxidized

Severely oxidized

Liquid state

100-1200

0.05-0.1

0.45

0.25-0.35

0.5-0.6

0.8-0.95

0.35-0.45

Cast iron:

Polished not oxidized

Polished slightly oxidized

100-1200

0.3

0.5


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Rough machined slightly oxidized

Severely oxidized

Liquid state

0.5

0.75

0.8-0.95

0.35-0.4

Stainless steel

Clean and smooth surface

Oxidized over 800°C

Room

temperature-800

0.2-0.25

0.85

Copper:

Smooth slightly oxidized

Sever oxidized

Liquid state

100-1000

100-1000

0.5

0.8

0.15-0.2

Iridium 0.25-0.3

Uranium 0.5-0.55

Mercury (liquid) 0.2-0.25

Cobalt:

Polished, not oxidized

Polished, slightly oxidized

Polished, severely oxidized



Rough machined, severely oxidized

100-1000

0.25

0.5

0.7

0.35

0.55-0.6

0.7-0.75

Nickel and nickel coating:



100-1000

0.25

0.4


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0.8-0.9

0.35

0.5

0.8-0.9

Black oxide nickel 500-1000 0.8-0.9

Bismuth 0.34

Silver and silver coating:



100-900

0.1-0.25

0.15-0.35

Tungsten

Ribbon, polished, not oxidized

(tungsten lamp)

1500 0.3-0.39

0.3-0.37

0.3-0.36

Magnesium : polished, not oxidized 0.1-0.2

Platinum:







Platinum black

50-1000

0.25

0.3

0.4

0.3

0.4

0.4-0.5

0.95

Tantalum:



100-1000

0.2

0.45


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0.75-0.85

0.3

0.6

0.75-0.85

Palladium 0.33

Antimony 0.5-0.65

Beryllium: smooth and oxidized 0.3-0.4

Brick:

White firebrick

Silica Brick

100-1000

1000

0.3

0.5-0.6

Yttrium 0.3-0.35

Alumina

Granularity 1-2 Micron

Granularity 10-100 Micron

200-1000

1000-1500

0.2-0.4

Iron-NiChrome







0-1000

0.3

0.4

0.8-0.9

0.35-0.4

0.6

0.8-0.9

Carbon

Carbon black

Graphite

0-1500

0-1500

0-1500

0.8-0.85

0.95

0.8


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Procedure to adjust the emissivity in one-color mode:

1. Set the pyrometer to work in one-color mode (Mode LED off).

2. Determine actual target temperature with a contact RTD, thermocouple or other

appropriate instrument.

3. Press SET button until the display shows “1-“(flashing), then press ENTER to adjust

the emissivity.

4. Use the “up” and “right” arrow buttons to adjust the value.

5. The emissivity adjustment range is from 0.10 to 1.00; in 0.01 increments. For

0.01↑, results in 1.0°C ↓, factory default value is 0.95.

6. Press ENTER to save the adjustment and return to the temperature display mode.

Two-color mode: Temperature Slope Adjustment (Calibration)

Temperature slope is a coefficient to compensate for the two wavelengths emissivity

difference.

Note: The listed ratios are approximate values and can change with alloy surface condition and

oxidization.

For these oxide metals, the temperature slope setup value is 1.000

Cobalt Nickel Iron Stainless steel Steel

For these metals, the temperature slope value is 1.030

Cobalt Iron Stainless Steel

Rhodium Tungsten Molybdenum

Platinum Steel Nickel

Tantalum Cast Iron

Slope adjustment allows the user to refine the accuracy of the pyrometer for specific

applications. This feature can be used to calibrate the pyrometer.

1. Use a reliable thermometer to measure the surface temperature of the target. If

temperature readings vary in different measured areas, use the average reading.

2. Set the pyrometer to work in two-color mode (Mode LED ON)

3. Press SET button until the display shows “1-“(flashing), then press ENTER to adjust the

temperature slope.

4. Use the “up” and “right” arrow buttons to adjust the value.

5. The temperature slope adjustment range is 0.850 to 1.150 in 0.001 increments. For 0.001↑,


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results in 1.4°C ↓. Factory default setup value is 1.000.

6. Press ENTER to accept the slope adjustment and return to the temperature display mode.

Set Menu 2- Display Mode

This feature allows the user to select different temperature display modes; Peak temperature;

Valley temperature; or Average temperature values.

Peak: Response time setup range from 0-999.9s. If response time is set greater than 999.9

seconds, the current display will remain unchanged.

Applications: Best for moving target temperature measurement (steel plate, sheet). This

function can also be used for measuring surface temperature of liquid metal when highest

temperature measurement is required.

Valley: Response time setup range from 0-999.9s. If response time is set greater than 999.9

seconds, the current display will remain unchanged.

Applications: Best for measuring surface temperature of liquid metals when lowest

temperature measurement is required.

Average: Response time setup range from 0-60.0 seconds.

Applications: Most field applications. For example, if there is scale on steel plate or bar,

average temperature display mode should be selected.

Real time display: Set response time to 0.0s. In this display mode, the sampling time is set

20ms by pyrometer and display changes each time new data is collected.

1. Press SET button until the display shows “2-“(flashing).

2. Press ENTER button and use the “up” arrow button to select “display” states. Select (1)

for Peak, (2) for Valley or (3) for Average. The factory default value is Average value

(indicated by the number 3).

3. Press ENTER to return to the temperature display mode.


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Temperature

TimeΔt 2Δt 3Δt 4Δt0

Peak Display

Actual Temperature

Figure 5.2 Peak Display

Temperature


Valley Display

Actual Temperature

Figure 5.3 Valley Display


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Temperature


Average display

Actual temperature

Figure 5.4 Average Display

Temperature

Time(ms)20ms 40ms 60ms 80ms0

Real timedisplay

Actualtemperature

Figure 5.5 Real Time Display

Set Menu 3– Output Signal Integration Time

This feature allows the user to average (integrate) the output signal over a set time for

control purposes and to avoid wide temperature signal swings.


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Press SET until the display shows “3“ (flashing), then press ENTER to adjust the signal

integration time. Use the “up” and “right” arrow buttons to adjust the integration time.

The time adjustment range is 0 to 999 seconds. The factory default setting is 0 seconds.

Press ENTER to return to the temperature display mode.

For peak and valley temperature detection, the time adjustment range is 0-999s. For

average temperature detection, the time adjustment range is 0-60s.

Set Menu 4-, 5-, 6- Process Alarm Settings

Use these menus to set the upper and lower alarms and the alarm deadband (to prevent

alarm relay contacts “chatter”, this is the temperature range in which the alarm turns off

after being triggered).

Menu “-4”: Upper Limit Alarm, default 1600°C

Menu “-5”: Lower Limit Alarm, default 600°C

Menu “-6”: Alarm Deadband coefficient, default 0.001

If temperature is lower than 600°C, lower alarm relay is triggered, “Lower” alarm LED

indicator turns ON

If temperature is higher than 1600°C, upper alarm relay is triggered. PNP output high

(24VDC) “upper” alarm LED indicator turns ON.

Note: Lower alarm may be set higher than the upper alarm

Deadband coefficient range 0 - 0.500

Lower alarm deadband= ±deadband coefficient*lower alarm setting

Upper alarm deadband= ±deadband coefficient*upper alarm setting

1. Use the “up” and “right” arrow buttons to adjust the alarm settings. Alarm settings are °C

(or °F).


Set Menu 7-, 8- Current/Voltage Analog Output Span Settings

Set the linear temperature span to correspond with the current or voltage output of the

pyrometer.

Menu 7- : Lower Temperature for the output span, default 600°C

Menu 8- : Upper Temperature for the output span, default 1600°C

1. Use the “up” and “right” arrow buttons to adjust the span settings



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Use the following guidelines to calculate the current/voltage output that corresponds

to temperature:

Voltage output (0-10 V) Current output (4-20mA)

�� 10 ��

�� 4 � 16 �

� ��

��

T= present measured target temperature

TL = output span lower limit temperature

TH = output span upper limit temperature

Example:

Measured temperature is 943oC; output span is 4 to 20 mA DC proportional to 700 to 1400

oC.

Calculated current output at measured temperature is

�� 4 � 16 �943 � 700

1400 � 700� 4 � 16 �

243

700� 4 � 5.55 � 9.55 ��

Set Menu 9- Aiming Laser Setup

Four setups available: OFFd, OFFn, ON d and ON n. See below for details. This function selects

whether the laser switch function is open or closed when the temperature limit is exceeded.

The function is not available for FOC pyrometer.

OFFd: Turns the aiming laser off. It will automatically turn back on when the target

temperature is greater than the lower limit setup value.

OFFn: Turns aiming laser off.

ON d: Turns aiming laser on. After 30 minutes, the laser will turn off if the target temperature

is below the lower limit setup value.

ON n: Turns aiming laser on. After 30 minutes, laser will turn off.

1. Use SET and ENTER buttons to select the Aiming Laser Switch (Menu “9-“).

2. Use the “up” and “right” arrow buttons to change the setting. The factory default is “OFFd”.


Display Menu 10- Enclosure Temperature

This feature only displays the current enclosure temperature for diagnostic purpose.


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If the enclosure temperature is higher than 70 oC, the display shows “EEE1”.

If the enclosure temperature is lower than -10 oC, the display shows “EEE2”.

Either of these conditions exists, steps must be taken to adjust the ambient temperature.

Display Menu 11- Two Color Ratio

This function only displays the ratio of the current two wavelength signals for service

diagnostic purposes.

Set Menu 12- Zero Compensation Gain

This feature is used to adjust the detector gain to compensate for targets with a starting

temperature below the specified measurement limits of the Logika PM-616 pyrometer.

Use SET and ENTER buttons to select the Zero Compensation Coefficient (“Menu 12-“)

The four digit number shows the coefficient; the first number represents the coefficient

polarity (1 = positive and 0 = negative). The remaining three numbers show the coefficient

value.

Use the “up” and “right” arrow buttons to change the Zero Compensation Coefficient. This

value is always set below 1.00. The factory default for the Zero Compensation Coefficient code

is 10.10 which equals +0.10.

Press ENTER to return to the temperature detection mode.

No UsePlority1: Positive0:Negative

Coefficient

Value X.XX

Figure 5.6 Zero Coefficient Gain setup

Set Menu 13- Two-color mode signal attenuation ratio

Attenuation Ratio = 100% – Emissivity (Check Page 11 in Set Menu 1 for Emissivity).

Attenuation ratio is a threshold for verifying the validation of the measured temperature.

After the target temperature is calculated by the pyrometer, it calculates each wavelength’s


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emissivity at this temperature. For each wavelength, the attenuation ratio (100% – Emissivity

value) should not be less than the set value. If either one is higher than the set value, the

pyrometer displays the lower limit temperature.

This function is only used in two-color mode. The setup range is 20%-100% and the default

setup value is 95%. If the attenuation ratio is set greater than 95%, this function will shut

down; and again, the lower limit temperature will be displayed. For example, if the pyrometer

is used to detect the temperature of tungsten filament of a light bar, usually the temperature

is higher than 1500°C (2732°F). The tungsten filament (target) diameter is very small at 2mm,

so the emissivity would be very low. According to Figure 5.6, if the temperature is greater

than 900°C and target size is 2mm, the attenuation ratio should be set to 95%. This means

that as long as the emissivity value for each wavelength signal is not less than 5%, the

calculated temperature is valid. In this case, the two-color mode, can still accurately calculate

the temperature. In single color mode, it would be very hard to get an accurate target

temperature in this situation.

Table 5.2 Attenuation Ratio Setup Value

Target

size(Diameter)

Accurate measurement

attenuation ratio

Simplified measurement

attenuation ratio

2mm-10mm 95% 95%

10mm-30mm 90% 95%

30mm-100mm 80% 95%

>100 mm 70% 70%

The values above are for reference only when setting up the attenuation ratio. The value

should be adjusted depending on application environment and target size.

1. Use SET and ENTER buttons to select the signal attenuation ratio setup (“Menu 13-“)

2. Use the “up” and “right” arrow buttons to change the value.



P a g e | 24


600- 7001112-1292

8001472

9001652

10001832

11002012

12002192

13002372

14002552

15002732

16001912

10

20

30

40

50

60

70

80

90

100

1

2

5

10

20

Attenuation ratiocan be set at 95%

1Emissivity

Target temperature

Ma

x a

llo

we

d a

tte

nu

ati

on

ra

tio

(%

)

°C°F

Figure 5.7 Two-color mode signal attenuation ratio

5.3 Debugging

Adjust emissivity according to material properties

(a) Use a thermocouple to measure the real temperature of the object, and then adjust

the slope until the test result is the same as the thermocouple.

(b) If the object is painted black, the emissivity can reach 0.98. Test the adjacent area,

and adjust the slope until the test result is the same as the thermocouple. Now the

slope has been properly adjusted.


P a g e | 25


Table 5.2 PM-616 Keypad Operation

Function Description Default Key

SET Setup Parameters Display parameters from 1- to 13- each time button is pressed.

Press ENTER to Exit N/A SETUP

1- Slope/Emissivity

Adjustment

Single Color: Emissivity Rate, Range 0.10-1.00

Two Color: Temperature Slope: 0.850-1.150

0.95

1.000

2- Display/Sample

Mode

1 = Peak 2 = Valley 3 = Average 3

3- Response Time 0.0-999.9s adjustable. 0s=20ms, internal setup value, real time

display 0.5

4- Upper Limit Alarm Modify the Upper limit alarm temperature value 1600°C

5- Lower Limit Alarm Modify the Lower limit alarm temperature value 600°C

6- Alarm Deadband Modify alarm deadband value 0.001(0.1%)

7- Analog Output

Span Lower Limit

Temperature corresponds to linear analog current/voltage

output span lower value 600°C

8- Analog Output

Span Upper Limit

Temperature corresponds to linear analog current/voltage

output span upper value 1600°C

9- Aiming Laser Standard PM only, not for fiber optic PM. 4 setups available:

OFFd, OFFn, ONd, ONn. See setup menu 9- for details. OFFd

10- Enclosure

Temperature

Setup constant at 40°C. If display is higher than 50°C, the

pyrometer should be cooled down N/A

Display

only

11- Two Color Signal

Ratio

Only used for pyrometer diagnostic purposes. In two color

mode, select 3(average) in setup 3-, the display value is the

ratio of the two wavelength signals

N/A Display

only

12- Zero

compensation

gain

Adjusts the pyrometer gain to compensate for targets with a

starting temperature below specified measurement limits. First

digit on left 1=positive, 0=negative. The remaining 3 numbers

are the coefficient value. The value should always be set below

0.30

10.10 (+0.1)

13- Two Color Signal

Attenuation Ratio

Only used in two color mode. If setup value is greater than

95%, this function is off. See setup menu 13- for details. 95%


P a g e | 26


6 Maintenance

6.1 Regular Maintenance

Regular attention to the following will ensure accurate and prolonged operation of the

pyrometer:

Lens Cleaning - Routinely check the lens glass for dust or oil residue. If necessary, clean glass

with alcohol and lens paper or soft cloth.

Calibration - Occasional calibration using the temperature slope adjustment (see “Set Menu 1“)

will ensure that maximum accuracy is maintained.

6.2 Instrument Return

Contact us at 1-888-856-4452 (1-888-8LOGIKA) with the Serial Number of your pyrometer

before you return our product. If the problem cannot be resolved by telephone or email, we

will provide you with a return authorization number.

Please return to: Logika Technologies Inc.

2-2857 Sherwood Heights Drive,

Oakville, ON, L6J 7J9

Canada

Do not return the pyrometer without a return authorization number. If the product is out of

warranty, we will provide a repair estimate and then complete the repairs upon your approval.


P a g e | 27


7 Appendix

Figure7.1 PM-616-024 Dimension

Figure7.2 PM-616-FOC-024 Dimension


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Figure7.3 Junction Box Mechanical Dimension

+24V OUT

0V OUT

0-10V

mA

GND

PNP

LOWER

LOWER

UPPER

UPPER

J1

J2

J3

Filter

NC

NC

0-10V

mA

GND

PNP

LOWER

LOWER

UPPER

UPPER

NC

NC

+

-

E

+24V IN

EARTH

0V IN

Figure7.4 DC-DC Junction Box Connection Drawing


P a g e | 29


J3

L

EARTH

N

J1

+24V OUT

0V OUT

0-10V

mA

GND

PNP

LOWER

LOWER

UPPER

UPPER

NC

NC

J2

+24V OUT

0V OUT

0-10V

mA

GND

PNP

LOWER

LOWER

UPPER

UPPER

NC

NC

AC-DCConverter

DC Filter

Figure7.5 AC-DC Junction Box Connection Drawing

Figure7.6 Pyrometer control panel layout


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LOGIKAUpper LimitAlarmLower LimitAlarm △ △TechnologiesFront

Rear Pin Connection

1

2

3

4

5

6

7

8

9

10

11

12

13

Voltage In

Current In +

-

+

Signal Ground

L

E

N

DC +24V Out

0V Out

Figure7.7 Universal Temperature Display mechanical dimension

model pm-616 two-color pyrometer operator’s manual revision...

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