Optris CTratio 1M, CTratio 2M Operating Manual

optris

®

CTratio

1M/ 2M

Fiber Optics Ratio Thermometer

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 ................................................................................................................................. 7

1.1 Description ....................................................................................................................................... 7

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

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

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

1.5 Safety Note ..................................................................................................................................... 10

1.6 Cautions ......................................................................................................................................... 10

1.7 Factory Default Settings ................................................................................................................. 11

2 Technical Data ........................................................................................................................................ 13

2.1 General Specifications ................................................................................................................... 13

2.2 Electrical Specifications .................................................................................................................. 14

2.3 Measurement Specifications [1M models] ..................................................................................... 15

-4 -

2.4 Measurement Specifications [2M models] ..................................................................................... 16

2.5 Optics ............................................................................................................................................. 17

3 Mechanical Installation .......................................................................................................................... 20

3.1 Accessories .................................................................................................................................... 23

3.2 Laser Sighting ................................................................................................................................ 25

4 Electrical Installation ............................................................................................................................. 26

4.1 Cable Connections ......................................................................................................................... 26

4.2 Ground Connection ........................................................................................................................ 28

5 Outputs and Inputs ................................................................................................................................ 29

5.1 Analog Output ................................................................................................................................ 29

5.2 I/O pins ........................................................................................................................................... 30

5.3 Programming Interface ................................................................................................................... 31

5.4 Relay Outputs ................................................................................................................................. 32

5.5 Alarms ............................................................................................................................................ 33

Table of Contents 5-

6 Operating ................................................................................................................................................ 34

6.1 Sensor Setup .................................................................................................................................. 34

7 IRmobile app ........................................................................................................................................... 38

8 Software Ratio Connect ........................................................................................................................ 40

8.1 Installation ...................................................................................................................................... 40

8.2 Communication Settings ................................................................................................................ 42

8.2.1 Serial Interface ........................................................................................................................... 42

8.2.2 Protocol ...................................................................................................................................... 42

9 Basics of Infrared Thermometry........................................................................................................... 43

9.1 The Ratio Principle ......................................................................................................................... 44

10 Emissivity ............................................................................................................................................... 46

10.1 Definition......................................................................................................................................... 46

10.2 Determination of unknown Emissivity ............................................................................................ 46

10.3 Characteristic Emissivity ................................................................................................................ 47

-6 -

10.4 Characteristic Slope Values ........................................................................................................... 48

10.5 Determination of unknown Slope values ........................................................................................ 48

10.6 Attenuation ..................................................................................................................................... 48

Appendix A – Emissivity Table Metals ......................................................................................................... 50

Appendix B – Emissivity Table Non Metals ................................................................................................. 52

Appendix C – Smart Averaging ..................................................................................................................... 53

Appendix D – Declaration of Conformity ..................................................................................................... 54

General Information 7-

1 General Information

1.1 Description

Thank you for choosing the optris® CTratio infrared thermometer.
The sensors of the optris CTratio series are noncontact infrared temperature sensors.
They calculate the surface temperature based on the emitted infrared energy of objects. The CTratio can
work in the 1-color-mode as well as in the ratio- or 2-color-mode [►9 Basics of Infrared Thermometry].
The optical sensing head of the CTratio is made of stainless steel (IP65/ NEMA-4 rating) and is connected
via a rugged fiber optics, which is protected by a stainless steel armour, with the sensor electronics (die
casting zinc box).

1-color-mode [1C]

The 1-color-mode is best for measuring the temperature of objects in areas where no sighting obstructions
(solid, gases or dust) exist. The measurement object must fill completely the measurement spot, if the 1­color-mode is used.

2-color-mode [2C]

In this mode the object temperature will be determined from the ratio of the signal of two separate and
overlapping infrared bands. The 2-color-mode is best for measuring the temperature of objects which are
partially obscured by other objects, openings or viewing windows that reduce energy and by dirt, smoke or
steam in the atmosphere. Another benefit of the 2-color-mode is that the measurement object can be smaller
than the measurement spot, provided the background is cooler than the target [►9.1 The Ratio Principle].

-8 -

The CTratio 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 [ ].

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

 CTratio sensing head with fibre connection cable and electronic box
 USB cable (Micro-USB, USB-C and USB-A cable included)
 1 mounting nut
 Mounting bracket, adjustable in one axis
 Operator’s Manual

-10 -

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

The CTratio is equipped with an integrated laser that serves to align the optics
with the target.

►3.2 Laser Sighting

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).

1.5 Safety Note

1.6 Cautions

Avoid static electricity. The fiber optical cable has a minimum bending radius of 40 mm.
In case of problems or questions which may arise when you use the CTratio, 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.

General Information 11-

Output 1

Analog: TProc/ max. temperature range (according to model) = 4-20 mA

Output 2

Analog: Attenuation/ 0-100 % = 0-20 mA

Emissivity

1,000

Slope

1,000

Averaging (AVG)

0,02 s

Smart Averaging

inactive

Hold mode (Peak/Valley hold)

inactive

1ML

1MH

1MH1

2ML

2MH

2MH1

Lower limit temperature range [°C]

525

700

1000

275

400

550

Upper limit temperature range [°C]

1400

2000

3000

1000

1500

3000

Max. attenuation

95 %

Temperature unit

°C

Baud rate [kBaud]

115

Main Display Source

TProc

Visual Alarm Source

Attenuation

Visual Alarm

0-95 % green
>95 % red

I/O pins

No function

1.7 Factory Default Settings

The unit has the following presetting at time of delivery:

-12 -

Smart Averaging means a dynamic average adaptation at high signal edges [activation via
software only].

►Appendix C – Smart Averaging

Technical Data 13-

Sensing head

Electronic box

Environmental rating

IP65 (NEMA-4)

Ambient Temperature

-20...200 °C (optional to 315 °C)

0...50 °C (2M) / 0…60 °C (1M)

Storage temperature

-40...200 °C

-40...85 °C1)

Relative humidity

10...95%, non condensing

Material

stainless steel

die casting zinc

Dimensions

length: 40 mm, thread: M18x1

89 mm x 70 mm x 36,6 mm

Weight

210 g (incl. fiber optics 3 m)

420 g

Fiber optics

Single mode fiber, stainless steel armour

Fiber optics length

3 m (standard), 8 m, 15 m

Vibration

IEC 68-2-6: 3 G, 11 – 200 Hz, any axis

Shock

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

Software

Ratio Connect / IRmobile Android app

2 Technical Data

2.1 General Specifications

1)

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

-14 -

Power Supply

8–30 VDC

Power

max. 5 W

Aiming laser

520 nm, <1 mW, On/ Off via programming keys or software

Outputs/ analog

2x 0/ 4–20 mA (12 bit) / optional: 2x 0/ 4–20 mA (16 bit) isolated

Digital I/O pins

3 programmable in-/ outputs, usable as:

 Alarm output (open collector output [24 V/ 1 A])
 Digital input for triggered signal output and peak hold function

Output impedance

max. loop resistance 500 Ω (at 8-30 VDC)

Digital interface

USB (optional: RS232, RS485)

Relay outputs

2 x 60 V DC/ 42 V AC

eff

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

2.2 Electrical Specifications

Technical Data 15-

1ML

1MH

1MH1

Temperature range (scalable)

1 color: 450...1400 °C
2 color: 525...1400 °C

1 color: 650...2000 °C
2 color: 700...2000 °C

1 color: 900…3000 °C
2 color: 1000…3000 °C

Spectral range

0,8 - 1,1 µm

Optical resolution

38:1

100:1

Vario focus

300 mm to infinity, infinitely adjustable

System accuracy

1), 2), 3)

±(0,5 % of reading +2 °C)

Repeatability

1), 2), 3)

±0,3 % of reading

Temperature resolution

0,1 K

Response time (90 % signal) 4)

1 ms…10 s

Emissivity

0,050…1,000 (adjustable via programming keys or analog input)

Slope

0,800…1,200 (adjustable via programming keys or analog input)

Signal processing

One-color-, Two-color-mode, Attenuation monitoring, Alarm, Average, Peak hold,

Valley hold, Advanced peak hold with threshold and hysteresis (adjustable via

programming keys or software)

2.3 Measurement Specifications [1M models]

1)

Measurements within specification over 5-95% of range

2)

at ambient temperature 235 °C

3)

 = 1/ Response time 1 s

4)

with dynamic adaptation at low signal levels

-16 -

2ML

2MH

2MH1

Temperature range (scalable)

1 color: 250...1000 °C
2 color: 275...1000 °C

1 color: 375...1500 °C
2 color: 400...1500 °C

1 color: 500…3000 °C
2 color: 550…3000 °C

Spectral range

1,45 - 1,75 µm

Optical resolution

38:1

50:1

100:1

Vario focus

300 mm to infinity, infinitely adjustable

System accuracy

1), 2), 3)

±(0,5 % of reading +2 °C)

Repeatability

1), 2). 3)

±0,3 % of reading

Temperature resolution

0,1 K

Response time (90 % signal) 4)

1 ms…10 s

Emissivity

0,050…1,000 (adjustable via programming keys or analog input)

Slope

0,800…1,200 (adjustable via programming keys or analog input)

Signal processing

One-color-, Two-color-mode, Attenuation monitoring, Alarm, Average, Peak hold,

Valley hold, Advanced peak hold with threshold and hysteresis (adjustable via

programming keys or software)

2.4 Measurement Specifications [2M models]

1)

Measurements within specification over 5-95% of range

2)

at ambient temperature 235 °C

3)

 = 1/ Response time 1 s

4)

with dynamic adaptation at low signal levels

Technical Data 17-

Optics

Focus adjustable in the range

SFV

300 mm till infinity

D = Distance from front of the sensing head to the object
S = Spot size

2.5 Optics

The vario optics of the CTratio allows a smooth focusing of the optics to the desired distance.

The following tables show the diameter of the measuring spot for some selected distances. 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).