Optris CT 1M, CT 2M Operating Manual

optris

®

CT

Infrared-thermometer

LT/ LTF/ LTH/ 1M/ 2M/ 3M/ G5/ P3/ P7

Operator’s Manual

Optris GmbH

Ferdinand-Buisson-Str. 14
13127 Berlin
Germany

Tel.: [phone]
Fax: [phone]

E-mail: [e-mail]
Internet: www.optris.global

-Table of Contents 3-

Table of Contents

Table of Contents ............................................................................................................................................. 3

1 General Information ................................................................................................................................. 8

1.1 Description ....................................................................................................................................... 8

1.2 Warranty ........................................................................................................................................... 9

1.3 Scope of Supply ............................................................................................................................... 9

1.4 Maintenance ................................................................................................................................... 10

1.5 Model Overview .............................................................................................................................. 11

1.6 Factory Default Settings ................................................................................................................. 13

2 Technical Data ........................................................................................................................................ 15

2.1 General Specifications ................................................................................................................... 15

2.2 Electrical Specifications .................................................................................................................. 16

2.3 Measurement Specifications [LT models] ...................................................................................... 17

2.4 Measurement Specifications [CTfast/ CThot]................................................................................. 18

-4 -

2.5 Measurement Specifications [1M/ 2M/ 3M models] ....................................................................... 20

2.6 Measurement Specifications [G5/ P7 models] ............................................................................... 23

2.7 Optical Charts ................................................................................................................................. 24

2.8 CF Lens and Protective Window .................................................................................................... 35

3 Mechanical Installation .......................................................................................................................... 39

3.1 Mounting Accessories .................................................................................................................... 42

3.2 Air Purge Collars ............................................................................................................................ 44

3.3 Further Accessories ....................................................................................................................... 46

4 Electrical Installation ............................................................................................................................. 53

4.1 Cable Connections ......................................................................................................................... 53

4.1.1 Designation [models LT/ G5/ P3/ P7] ........................................................................................ 53

4.1.2 Designation [models 1M/ 2M/ 3M] ............................................................................................. 54

4.1.3 Power supply.............................................................................................................................. 54

4.1.4 Cable Assembling ...................................................................................................................... 55

-Table of Contents 5-

4.2 Ground Connection ........................................................................................................................ 56

4.2.1 1M, 2M, 3M models ................................................................................................................... 56

4.2.2 LT, LTF, LTH, G5, P3, P7 models ............................................................................................. 57

4.3 Exchange of the Sensing Head ...................................................................................................... 58

4.3.1 Entering of the Calibration Code ................................................................................................ 58

4.3.2 Sensing Head Cable .................................................................................................................. 59

5 Outputs and Inputs ................................................................................................................................ 60

5.1 Analog Outputs ............................................................................................................................... 60

5.1.1 Output channel 1 ........................................................................................................................ 60

5.1.2 Output channel 2 [LT/ G5/ P3/ P7 only] ..................................................................................... 60

5.2 Digital Interfaces ............................................................................................................................. 61

5.3 Relay Outputs ................................................................................................................................. 61

5.4 Functional Inputs ............................................................................................................................ 62

5.5 Alarms ............................................................................................................................................ 63

-6 -

5.5.1 Output channel 1 and 2 [channel 2 on LT/ G5/ P3/ P7 only] ..................................................... 63

5.5.2 Open collector output / AL2: ...................................................................................................... 64

6 Operating ................................................................................................................................................ 65

6.1 Sensor Setup .................................................................................................................................. 65

6.2 Error messages .............................................................................................................................. 71

7 IRmobile app ........................................................................................................................................... 72

8 Software CompactConnect ................................................................................................................... 74

8.1 Installation ...................................................................................................................................... 74

8.2 Communication Settings ................................................................................................................ 76

8.2.1 Serial Interface ........................................................................................................................... 76

8.2.2 Protocol ...................................................................................................................................... 76

8.2.3 ASCII protocol ............................................................................................................................ 77

8.2.4 Saving of parameter settings ..................................................................................................... 78

9 Basics of Infrared Thermometry........................................................................................................... 79

-Table of Contents 7-

10 Emissivity ............................................................................................................................................... 80

10.1 Definition......................................................................................................................................... 80

10.2 Determination of unknown Emissivity ............................................................................................ 80

10.3 Characteristic Emissivity ................................................................................................................ 81

Appendix A – Table of Emissivity for metals ............................................................................................... 82

Appendix B – Table of Emissivity for non-metals ....................................................................................... 84

Appendix C – Smart Averaging ..................................................................................................................... 85

Appendix D – Declaration of Conformity ..................................................................................................... 86

-8 -

The CT sensing head is a sensitive optical system. Please use only the thread for mechanical
installation.

 Avoid abrupt changes of the ambient temperature.
 Avoid mechanical violence on the head – this may destroy the system (expiry of warranty).

 If you have any problems or questions, please contact our service department.

Read the manual carefully before the initial start-up. The producer reserves the right to change
the herein described specifications in case of technical advance of the product.

► All accessories can be ordered according to the referred part numbers in brackets [ ].

1 General Information

1.1 Description

Thank you for choosing the optris® CT infrared thermometer.
The sensors of the optris CT series are noncontact infrared temperature sensors.
They calculate the surface temperature based on the emitted infrared energy of objects [►9 Basics of
Infrared Thermometry]. The sensor housing of the CT head is made of stainless steel (IP65/ NEMA-4
rating) – the sensor electronics is placed in a separate box made of die casting zinc.

-General Information 9-

1.2 Warranty

Each single product passes through a quality process. Nevertheless, if failures occur please contact the
customer service at once. The warranty period covers 24 months starting on the delivery date. After the
warranty is expired the manufacturer guarantees additional 6 months warranty for all repaired or substituted
product components. Warranty does not apply to damages, which result from misuse or neglect. The
warranty also expires if you open the product. The manufacturer is not liable for consequential damage or in
case of a non-intended use of the product.
If a failure occurs during the warranty period the product will be replaced, calibrated or repaired without
further charges. The freight costs will be paid by the sender. The manufacturer reserves the right to
exchange components of the product instead of repairing it. If the failure results from misuse or neglect the
user has to pay for the repair. In that case you may ask for a cost estimate beforehand.

1.3 Scope of Supply

 CT sensing head with connection cable and electronic box
 Mounting nut
 Operators manual

-10 -

Never use cleaning compounds which contain solvents (neither for the lens nor for the housing).

1.4 Maintenance

Lens cleaning: Blow off loose particles using clean compressed air. The lens surface can be cleaned with a
soft, humid tissue (moistened with water) or a lens cleaner (e.g. Purosol or B+W Lens Cleaner).

-General Information 11-

Model

Model codes

Measurement
range

Spectral
response

Typical applications

CT LT
LT02

-50 to 600 °C

8-14 µm

non-metallic surfaces
LT15

LT22

-50 to 975 °C

CT fast
LT15F

-50 to 975 °C

8-14 µm

fast processes
LT25F

CT hot
LT02H

-40 to 975 °C

8-14 µm

high ambient temperatures (up to 250 °C)
LT10H

CT1M
1ML

485 to 1050 °C

1,0 µm

metals and ceramic surfaces
1MH

650 to 1800 °C

1MH1

800 to 2200 °C

CT 2M
2ML

250 to 800 °C

1,6 µm

metals and ceramic surfaces
2MH

385 to 1600 °C

2MH1

490 to 2000 °C

1.5 Model Overview

The sensors of the CT series are available in the following basic versions:

-12 -

CT 3M

3ML

50 to 400 °C

2,3 µm

metals at low object temperatures (from 50 °C)

3MH

100 to 600 °C

3MH1

150 to 1000 °C

3MH2

200 to 1500 °C

3MH3

250 to 1800 °C

CT G5
G5L

100 to 1200 °C

5,0 µm

measurement of glass
G5H

250 to 1650 °C

CT P3

P3

50 to 400 °C

3,43 µm

temperatures of thin film plastics
CT P7

P7

0 to 710 °C

7,9 µm

In the following chapters of this manual you will find only the short model codes.
On the 1M, 2M, 3M and G5 models the whole measurement range is split into several sub ranges (L, H, H1 etc.).

-General Information 13-

Signal output object temperature

0-5 V

Emissivity

0,970 [LT/ G5/ P3/ P7]
1,000 [1M/ 2M/ 3M]

Transmissivity

1,000

Averaging (AVG)

0,2 s
LT15F/ LT25F: 0,1 s
1M/ 2M/ 3M: 0,001 s

Smart Averaging

inactive
LT15F, LT25F: active

Peak hold

inactive

Valley hold

inactive

LT

1ML

1MH

1MH1

2ML

2MH

2MH1

3ML

3MH

Lower limit temperature range [°C]

0

485

650

800

250

385

490

50

100

Upper limit temperature range [°C]

500

1050

1800

2200

800

1600

2000

400

600

Lower alarm limit [°C]
(normally closed)

30

600

800

1200

350

500

800

100

250

Upper alarm limit [°C]
(normally open)

100

900

1400

1600

600

1200

1400

300

500

1.6 Factory Default Settings

The unit has the following presetting at time of delivery:

-14 -

3MH1

3MH2

3MH3

G5L

G5H

P3

P7

Lower limit temperature range [°C]

150

200

250

100

250

50 0

Upper limit temperature range [°C]

1000

1500

1800

1200

1650

400

710

Lower alarm limit [°C]
(normally closed)

350

550

750

200

350

70

30

Upper alarm limit [°C]
(normally open)

600

1000

1200

500

900

200

100
Lower limit signal output

0 V

Upper limit signal output

5 V

Temperature unit

°C

Ambient temperature compensation
(Output at OUT-AMB as 0-5 V signal on
LT, G5 and P7)

internal head temperature probe
Baud rate [kBaud]

115

Smart Averaging means a dynamic average adaptation at high signal edges.
[Activation via software only]. ►Appendix C – Smart Averaging

-Technical Data 15-

Sensing head

Electronic box

Environmental rating

IP65 (NEMA-4)

IP65 (NEMA-4)

Operating Temperature

see: Measurement Specifications

-20...85 °C 1)

Storage temperature

see: Measurement Specifications

-40...85 °C

Relative humidity

10...95 %, non-condensing

Material

stainless steel

die casting zinc

Dimensions

28 mm x 14 mm or 32 mm x 14 mm, M12x1

89 mm x 70 mm x 30 mm

Dimensions CThot/ CT P3/ P7

55 mm x 29,5 mm, M18x1 (with massive housing)

Weight

40 g

420 g

Weight CThot/ CT P3/ P7

205 g (with massive housing)

Cable length

1 m (only LT02, LT15, LT22, CTfast)
3 m (Standard at CThot, 1M, 2M, 3M, G5, P3 and P7)

2)

8 m
15 m

Cable diameter

2,8 mm

Ambient temperature cable

max. 180 °C [High temperature cable for CThot: 250 °C]

Vibration

IEC 68-2-6: 3G, 11 – 200 Hz, any axis

Shock

IEC 68-2-27: 50G, 11 ms, any axis

2 Technical Data

2.1 General Specifications

-16 -

Pressure resistance (head)

8 bar

Software (optional)

CompactConnect

Power Supply

8–36 VDC

Current draw

max. 100 mA

Outputs/ analog
Channel 1

Channel 2 [LT/ G5/ P3/ P7 only]

selectable: 0/ 4–20 mA, 0–5/ 10 V, thermocouple (J or K) or alarm output (Signal source:
object temperature)

Head temperature [-20...180 °C/ -20...250 °C on LT02H and LT10H] as 0–5 V or 0–10 V
output or alarm output (Signal source switchable to object temperature or electronic box
temperature if used as alarm output)

Alarm output

Open collector output (NPN type) at Pin AL2 [24 V/ 50 mA]

Output impedances
mA
mV
Thermocouple

max. loop resistance 500 Ω (at 8-36 VDC)
min. 100 KΩ load impedance
20 Ω

Digital interfaces

USB, RS232, RS485, CAN, Profibus DP, Ethernet, Modbus RTU (optional plug-in
modules)

Relay outputs

2 x 60 VDC/ 42 VAC

RMS

, 0,4 A; optically isolated (optional plug-in module)

1)

The functionality of the LCD display can be limited at ambient temperatures below 0 °C

2)

The 3M models are only available with 3 m cable length

2.2 Electrical Specifications

-Technical Data 17-

Functional inputs

F1-F3; software programmable for the following functions:

 external emissivity adjustment
 ambient temperature compensation
 trigger (reset of hold functions)

Input impedance F2 and F3: 43 kΩ

LT02

LT15

LT22

Temperature range (scalable)

-50...600 °C

-50...975 °C

Ambient temperature (head)

-20...130 °C

-20...180 °C

Storage temperature (head)

-40...130 °C

-40...180 °C

Spectral range

8...14 µm

Optical resolution

2:1

15:1

22:1

System accuracy

1), 2)

±1,0 °C or ±1,0 % 3)

Repeatability 1)

±0,5 °C or ±0,5 % 3)

Temperature coefficient 5)

±0,05 K/ K or ±0,05 %/ K (whichever is greater)

Temperature resolution (NETD)

3), 4)

0,1 K

0,05 K

Response time (95 % signal)

150 ms

Warm-up time

10 min

Emissivity/ Gain

0,100...1,100 (adjustable via programming keys or software)

2.3 Measurement Specifications [LT models]

-18 -

Transmissivity

0,100...1,100 (adjustable via programming keys or software)

Interface (optional)

USB (programmable adapter)

Signal processing

Average, peak hold, valley hold (adjustable via programming keys or software)

On the LT02 models the head cable must not be moved during the measurement.

LT15F

LT25F

LT02H

LT10H

Temperature range (scalable)

-50...975 °C

-40...975 °C

Ambient temperature (head)

-20...120 °C

-20...250 °C

Storage temperature (head)

-40...120 °C

-40...250 °C

Spectral range

8...14 µm

Optical resolution

15:1

25:1

2:1

10:1

System accuracy

1), 2)

±2°C or ±1% 3)

±1,5°C or ±1% 3)

Repeatability 1)

±0,75 °C or ±0,75 % 3)

±0,5 °C or ±0,5 % 3)

1)

at ambient temperature 235 °C; whichever is greater

2)

Accuracy for thermocouple output: ±2,5°C or ±1%

3)

at object temperatures >0 °C, ε = 1

4)

at time constant 200 ms and an object temperature of 25 °C

5)

for ambient temperatures (head) <18 °C and >28 °C

2.4 Measurement Specifications [CTfast/ CThot]

-Technical Data 19-

LT15F

LT25F

LT02H

LT10H

Temperature coefficient 5)

±0,05 K/ K or ±0,05 %/ K (whichever is greater)

Temperature resolution (NETD)

3), 4)

0,2 K

0,4 K

0,25 K

Response time (90 % signal)

9 ms

6 ms

100 ms

Warm-up time

10 min

Emissivity/ Gain

0,100...1,100 (adjustable via programming keys or software)

Transmissivity

0,100...1,100 (adjustable via programming keys or software)

Signal processing

Average, peak hold, valley hold (adjustable via programming keys or software)

On the CThot models [LT02H/ LT10H] the head cable must not be moved during the
measurement.

1)

at ambient temperature 235 °C; whichever is greater

2)

Accuracy for thermocouple output: ±2,5°C or ±1%

3)

at object temperatures ≥ 20 °C

4)

at time constant 100 ms with smart averaging and an object temperature of 25 °C

5)

for ambient temperatures (head) <18 °C and >28 °C

-20 -

1ML

1MH

1MH1

2ML

Temperature range (scalable)

485...1050 °C

650...1800 °C

800...2200 °C

250...800 °C

Ambient temperature (head)

-20...100 °C

-20...125 °C

Storage temperature (head)

-40...100 °C

-40...125 °C

Spectral range

1,0 µm

1,6 µm

Optical resolution

40:1

75:1

40:1

System accuracy

1) 2)

±(0,3 % of reading +2°C)

3)

Repeatability 1)

±(0,1 % of reading +1 °C)

3)

Temperature coefficient 5)

±0,05 K/ K or ±0,05 %/ K (whichever is greater)

Temperature resolution (NETD)

0,1 K 3)

Exposure time (90 % signal)

1 ms 4)

Emissivity/ Gain

0,100...1,100 (adjustable via programming keys or software)

Transmissivity

0,100...1,000 (adjustable via programming keys or software)

Signal processing

Average, peak hold, valley hold (adjustable via programming keys or software)

2.5 Measurement Specifications [1M/ 2M/ 3M models]

1)

at ambient temperature 235 °C

2)

Accuracy for thermocouple output: ±3,5°C or ±1%

3)

 = 1/ Response time 1s

4)

with dynamic adaptation at low signal levels

5)

for ambient temperatures (head) <18 °C and >28 °C

-Technical Data 21-

2MH

2MH1

3ML

3MH

Temperature range (scalable)

385...1600 °C

490...2000 °C

50...400 °C

1), 2)

100...600 °C

1), 2)

Ambient temperature (head)

-20...125 °C

-20...85 °C

Storage temperature (head)

-40...125 °C

-40...125 °C

Spectral range

1,6 µm

2,3 µm

Optical resolution

75:1

22:1

33:1

System accuracy

3) 4)

±(0,3 % of reading +2°C)

5)

Repeatability 3)

±(0,1 % of reading +1 °C)

5)

Temperature coefficient 7)

±0,05 K/ K or ±0,05 %/ K (whichever is greater)

Temperature resolution (NETD)

0,1 K 5)

Exposure time (90 % signal)

1 ms 6)

Emissivity/ Gain

0,100...1,100 (adjustable via programming keys or software)

Transmissivity

0,100...1,000 (adjustable via programming keys or software)

Signal processing

Average, peak hold, valley hold (adjustable via programming keys or software)

1)

T

> T

Head

+25 °C

≥ start of measurement range + 50°C

Object

Object

2)

Specification valid at T

3)

at ambient temperature 235 °C

4)

Accuracy for thermocouple output: ±2,5°C or ±1%

5)

 = 1/ Response time 1s

6)

with dynamic adaptation at low signal levels

7)

for ambient temperatures (head) <18 °C and >28 °C

-22 -

3MH1

3MH2

3MH3

Temperature range (scalable) 2)

150...1000 °C

200...1500 °C

250...1800 °C

Ambient temperature (head)

-20...85 °C

Storage temperature (head)

-40...125 °C

Spectral range

2,3 µm

Optical resolution

75:1

System accuracy

1) 3)

±(0,3 % of reading +2°C)

4)

Repeatability 1)

±(0,1 % of reading +1 °C)

4)

Temperature coefficient 6)

±0,05 K/ K or ±0,05 %/ K (whichever is greater)

Temperature resolution (NETD)

0,1 K 4)

Response time (90 % signal)

1 ms 5)

Emissivity/ Gain

0,100...1,100 (adjustable via programming keys or software)

Transmissivity

0,100...1,000 (adjustable via programming keys or software)

Signal processing

Average, peak hold, valley hold (adjustable via programming keys or software)

1)

at ambient temperature 235 °C

2)

Specification valid at T

3)

Accuracy for thermocouple output: ±2,5°C or ±1%

4)

 = 1/ Response time 1s

5)

with dynamic adaptation at low signal levels

6)

for ambient temperatures (head) <18 °C and >28 °C

≥ start of measurement range + 50°C

Object

-Technical Data 23-

G5L

G5H

P3

P7

Temperature range (scalable)

100...1200 °C

250...1650 °C

50...400 °C

0...710 °C

Ambient temperature (head)

-20...85 °C

0...75 °C

-20...85 °C

Storage temperature (head)

-40...85 °C

Spectral range

5,0 µm

3,43 µm

7,9 µm

Optical resolution

10:1

20:1

15:1

10:1

System accuracy

1) 2)

±2 °C or ±1 % 3)

±3 °C or ±1 %

±1,5 °C or ±1 %

3) 5)

Repeatability 1)

±0,5 °C or ±0,5 % 3)

±1,5 °C

±0,5 °C or ±0,5 %

3) 5)

Temperature coefficient 4)

±0,05 K/ K or ±0,05 %/ K (whichever is greater)

Temperature resolution (NETD)

0,1 K 3)

0,2 K 3)

0,1 K 3)

0,5 K 3)

Response time (90 % signal)

120 ms

80 ms

100 ms

150 ms

Emissivity/ Gain

0,100...1,100 (adjustable via programming keys or software)

Transmissivity

0,100...1,000 (adjustable via programming keys or software)

Signal processing

Average, peak hold, valley hold (adjustable via programming keys or software)

2.6 Measurement Specifications [G5/ P7 models]

1)

at ambient temperature 235 °C; whichever is greater

2)

Accuracy for thermocouple output: ±2,5°C or ±1%

3)

 = 1/ Response time 1s

4)

for ambient temperatures (head) <18 °C and >28 °C

5)

at object temperatures ≥ 25 °C

-24 -

D = Distance from front of the sensing
head to the object

S = Spot size

The size of the measuring object and the optical resolution of the infrared thermometer
determine the maximum distance between sensing head and measuring object.
In order to prevent measuring errors the object should fill out the field of view of the optics
completely.
Consequently, the spot should at all times have at least the same size like the object or should
be smaller than that.

2.7 Optical Charts

The following optical charts show the diameter of the measuring spot in dependence on the distance
between measuring object and sensing head. The spot size refers to 90 % of the radiation energy.
The distance is always measured from the front edge of the sensing head.

As an alternative to the optical diagrams, the spot size calculator can also be used on the
Optris website (https://www.optris.global/spot-size-calculator) or via the Optris calculator app.
The app can be downloaded for free from the Google Play store (see QR code).

-Technical Data 25-

LT22
Optik: CF

D:S: 22:1
2,3mm@ 50mm

D:S (far field) = 6:1

LT22
Optics: SF

D:S: 22:1

LT25F
Optics: SF

D:S: 25:1

-26 -

LT15 LT15F
Optics: CF

D:S: 15:1
3,0mm@ 50mm

D:S (far field) = 5:1

LT15 LT15F
Optics: SF

D:S: 15:1

-Technical Data 27-

LT10H
Optics: CF1

D:S: 10:1
3,0mm@ 30mm

D:S (far field) = 3:1

LT10H G5L P7
Optics: SF

D:S: 10:1