This document describes infrared temperature sensors. It provides details on their features such as temperature range, rugged housing, optics, outputs, and power specifications. It also lists available sensor models with different output types, housings, cable lengths, and accessories, along with their prices. The document concludes with a two-year limited warranty statement.

1. Infrared temperature Sensors
Features: PVC cable ø17 (.67) .75"-16UNF 2A or
• Can easily replace traditional contact ø4 (.17) 18M X1 metric thread
probes with a J-type or k-typw thermo-
couple output, or with a user scaleable ø19 (.75)
0-5V output
• Wide -20 to 500°C (-4 to 932°F) temper- 19 73
(2.9)
ature range (.75)
94
• Rugged iP 65 (nEMA 4) stainless steel (3.7) mm (inches)
housing allows sensor to function in
1m (3.3 ft) cable standard
ambient temperatures to 70°C (160°F) Maximum ambient temperature 105°C (220°F)
without cooling
• 13:1 optics at 90% energy Specifications:
• Alarm output Temperature Range: -20 to 500°C (-4 to 932°F)
• Adjustable target emissivity settings Accuracy: mV: ±1.5% of reading or ±2°C;
• Adjustable window transmissivity setting t/c: ±1.5% of reading or ±4°C
• Adjustable signal processing: Peak hold, Repeatbility: ±0.5% of reading or ±2°C
Valley hold, variable averaging Resolution: 0.1°C
• Sensor status/self-diagnostic LED indicates optical Resolution: 13:1 @ 90% energy
normal operation, alarm, out of range, Spectral Response: 8 to 14 microns
unstable, sensor fault Response Time: 150mSec
• RS-232 digital interface allows user to con- Emissivity: 0.10 to 1.10 (adjustable)
figure all programmable sensor variables Transmissivity: 0.10 to 1.00 (adjustable)
with Data-Temp Multidrop software, outputs: Type J, Type k or scaleable 0-5V voltage
included with each sensor Power: 12 - 24 VDC @ 20 mA
output impedance: 100 Ω
• Each sensor also includes 1m (3.3 ft) pre-
Min. Load impedance: 50 kΩ
installed cable, two mounting nuts and
Power Supply: 12-24 VDC ±20% @ 10mA
Quick Start Guide
Digital output: Two-way RS-232
Alarm output: Transistor, 24VDC ±20% <20mA
model Description price
RAYCMLTV Voltage output, 0.75-16UnF 2A threaded SS housing, 1m (3.3 ft) cable $370
RAYCMLTVM Voltage output, 18Mx1 threaded SS housing, 1m (3.3 ft) cable $370
RAYCMLTV3 Voltage output, 0.75-16UnF 2A threaded SS housing, 3m (10 ft) cable $419
RAYCMLTV3M Voltage output, 18Mx1 threaded SS housing, 3m (10 ft) cable $419
RAYCMLTJ Type J T/C output, 0.75-16UnF 2A threaded SS housing, 1m (3.3 ft) cable $370
RAYCMLTJM Type J T/C output, 18Mx1 threaded SS housing, 1m (3.3 ft) cable $370
RAYCMLTJ3 Type J T/C output, 0.75-16UnF 2A threaded SS housing, 3m (10 ft) cable $419
RAYCMLTJ3M Type J T/C output, 18Mx1 threaded SS housing, 3m (10 ft) cable $419
RAYCMLTK Type k T/C output, 0.75-16UnF 2A threaded SS housing, 1m (3.3 ft) cable $370
RAYCMLTKM Type k T/C output, 18Mx1 threaded SS housing, 1m (3.3 ft) cable $370
RAYCMLTK3 Type k T/C output, 0.75-16UnF 2A threaded SS housing, 3m (10 ft) cable $419
RAYCMLTK3M Type k T/C output, 18Mx1 threaded SS housing, 3m (10 ft) cable $419
XXXCMACMN Stainless Steel Mounting nuts (2) $37
XXXCMACMNM Stainless Steel Mounting nuts (2), Metric Thread $37
XXXCIACFB Stainless Steel Fixed Bracket $57
XXXCIADJB Stainless Steel Adjustable Bracket $88
XXXCMACAP Stainless Steel Air Purge Collar $91
XXXCMACAPM Stainless Steel Air Purge Collar for Metric Threaded Housing $91
XXXCMACRA Right Angle Mirror $157
XXXCMACRAM Right Angle Mirror, Metric Thread $157
XXXCIDCPS 24VDC, 125mA Switching Power Supply $154
XXXCI1CON Thermocouple Cable Extension kit for CMJ Models $50
XXXCI2CON Thermocouple Cable Extension kit for CMK Models $50
RAYGPC 1/8 Din Panel Display & Power Supply $569
XXXCMACPW Protective Silicon Window $107
XXXCMACPWM Protective Silicon Window for Metric Models $107

2. CI TWO YEAR LIMITED WARRANTY
THERMALERT SERIES
Raytek warrants this product to be free from defects in material and
workmanship under normal use and service for a period of two
years from date of purchase except as hereinafter provided. This
warranty extends only to the original purchaser (a purchase from
Raytek or Raytek’s licensed distributors is an original purchase).
This warranty shall not apply to fuses or batteries. Factory calibra-
tion is warranted for a period of one year. The warranty shall not
apply to any product which has been subject to misuse, neglect,
accident, or abnormal conditions of operation or storage. Should
Raytek be unable to repair or replace the product within a reason-
able amount of time, purchaser’s exclusive remedy shall be a refund
of the purchase price upon return of the product.
In the event of failure of a product covered by this warranty, Raytek
will repair the instrument when it is returned by the purchaser,
freight prepaid, to an authorized Service Facility within the applica-
ble warranty period, provided Raytek’s examination discloses to its
satisfaction that the product was defective. Raytek may, at its
option, replace the product in lieu of repair. With regard to any cov-
ered product returned within the applicable warranty period,
repairs or replacement will be made without charge and with return
freight paid by Raytek, unless the failure was caused by misuse,
neglect, accident, or abnormal conditions of operation or storage, in
which case repairs will be billed at a reasonable cost. In such a case,
an estimate will be submitted before work is started, if requested.
THERMALERT® CI™
THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER WAR-
COMPACT INFRARED RANTIES, EXPRESSED OR IMPLIED, INCLUDING BUT NOT
LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILI-
SENSOR TY, FITNESS, OR ADEQUACY FOR ANY PARTICULAR PURPOSE
OR USE. RAYTEK SHALL NOT BE LIABLE FOR ANY SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER IN
OPERATOR’S GUIDE CONTRACT, TORT, OR OTHERWISE.
Raytek, the Raytek Logo, and Thermalert are registered trademarks and
CI is a trademark of Raytek Corporation
Rev J
05/00 © Copyright 1996-2000 by Raytek Corporation
56800-1
THERMALERT CI ACCESSORIES
The Thermalert® CI™ Compact Infrared Sensor series A full range of accessories for various applications and
of online instruments are noncontact infrared tempera- industrial environments are available (see Figure 1).
ture measurement systems. They are designed to meas- Accessories may be ordered at any time and added
ure accurately and repeatably the amount of heat ener- on-site. Also available is a J- or K-type thermocouple
gy emitted from an object and to convert that energy connection kit and extension cables.
into a measurable electrical signal.
Each model (see Table 1) comes with a 1 m (3 ft) cable
and two mounting nuts and is designed for easy inte- Adjustable mounting
bracket accessory
gration into standard 4-wire systems. There are J or K
thermocouple output models or 10 mV/°C voltage out-
Fixed
put models if your application is susceptible to noise or mounting bracket
Mounting nuts
requires a long cable run. The electronics are protected (2 supplied) accessory
by a rugged NEMA 4 stainless steel housing.
Sensor
Table 1: Models
Overall Air purge collar
Model Output Temp. Range Accuracy accessory
J Thermocouple 0 to 115˚ C (32 to 240˚ F) Sensor
CI1A
larger of ±2% or ± 3 ˚ C (± 6 ˚ F)
0 to 350˚ C 116 to 225˚ C (241 to 440˚ F)
CI2A K Thermocouple Right angle mirror
(32 to 662˚ F) larger of ± 5 % or ± 6 ˚ C (± 1 0˚ F) accessory
CI3A Voltage 226 to 350˚ C (441 to 662˚ F)
>±5%
Air/Water-cooled housing
with integrated air purge
CI1B J Thermocouple (factory installed option)
100 to 500˚ C (212 to 932˚ F)
larger of ± 2 % or ± 3 ˚ C (± 6 ˚ F)
30 to 500˚ C
CI2B K Thermocouple
(86 to 932˚F) 30 to 99˚ C (86 to 211˚ F)
larger of ± 5 % or ± 6 ˚ C (± 1 0˚ F)
Figure 1: Accessories and Options
CI3B Voltage
1 2

3. OPTIONS Table 2 (continued): Specifications
Options for various applications and environments Electrical
are available. Options are factory installed and must Power supply voltage 12 – 24 VDC @20 mA
be ordered with base model units. These include the Maximum current draw ≤ 10 mA
Ripple ≤ 2.5%
following: Output impedance 50 ohms
• NIST traceable certification Minimum load impedance 50K ohms
• Air/Water-cooled housing (comes with integrated Outputs J or K thermocouple,
air purging and high temperature cable) 10mV/˚C Linear Voltage
• High temperature cable–260°C (500°F) maximum Environmental
ambient temperature (comes standard with Sensing head rating IP 65, NEMA 4
air/water-cooled housing option) EMI
Conducted noise immunity IEC 801-4, Level 1
• Longer 3 m (10 ft) standard cable
Relative humidity 10 to 95%, non-condensing
Storage temp. range -30 to 85˚ C (-22 to 185˚ F)
SPECIFICATIONS Thermal shock Max error of 5˚ C (for ∆T=25˚)
Table 2 (below and continued on Page 4) lists the sen- stabilization time=20 mins.
Ambient operating range 0 to 70˚ C (32 to 160˚ F)
sor’s optical, thermal, operational, electrical, environ-
air cooling 0 to 94˚ C (32 to 200˚ F)
mental, and physical specifications. water cooling 0 to 105˚ C (32 to 220˚ F)
water cooling/high temp cable 0 to 260˚ C (32 to 500˚ F)
Table 2: Specifications
Physical
Dimensions 19 mm dia x 87 mm L
Optical Resolution 4:1 @ 90% energy (0.75 in dia x 3.4 in L)
Spectral Response Range 7–18 µm Weight 130 g (4.5 oz)
Material Stainless steel
Thermal
Measurement range See Table 1 Cable–Standard
Detecting element Thermopile Maximum ambient temperature 105˚ C (220˚ F)
Accuracy See Table 1 Material (type & color) PVC, grey
Cable length 1 m (3 ft)
Repeatability ±1% of reading
Gauge AWG 24 (J, K t/c cable)
Temperature coefficient 0.2˚ C per ˚C (0.2˚ F per ˚F)
AWG 22 (10mV/˚C cable)
Operational Cable–High Temperature
Temperature resolution < 0.5˚ C (1˚ F) Maximum ambient temperature 260˚ C (500˚ F)
Emissivity Fixed at 0.95 Material (type & color) Teflon, black
Response time 350 mSec (95% response) Cable length 1 m (3 ft)
Warm-up period < 1 minute Gauge AWG 24
Continued on next page
3 4
Optical Chart INSTALLATION
Figure 2 shows you how to read the optical chart. The
The installation process consists of the following:
optical chart (Figure 3) indicates the nominal target
• Preparation
spot diameter at any given distance from the sensing
• Mechanical Installation
head and assumes 90% energy.
• Electrical Installation
Target spot size Diameter of target Distance from sensor The most important part of the installation process is
at focus point spot size in inches to object in inches or feet preparation. Please read the following section thor-
oughly before proceeding with the mechanical and
electrical installations.
Preparation
Distance and Spot Size—The size of the area (spot
size) you wish to measure determines the distance
between the sensor and the target (see Figure 3 for dis-
tances and spot sizes). The spot size must not be larg-
er than the target. Mount the sensor so the measured
Diameter of target
spot is the same or smaller than the target. Figure 4 is
Distance from sensor to
spot size in millimeters object in millimeters or meters an overview of proper sensor placement.
Focus Point D:S = Distance to spot divided by spot diameter at the focus point
Far Field D:S = Ratio at distances greater than 10x the focus distance
Best Good Incorrect
Figure 2: How to Read the Optical Chart
Sensor
Target greater
than spot size
Target equal Background
to spot size
Target smaller
than spot size
Figure 3: Optical Chart Figure 4: Proper Sensor Placement
5 6

4. Ambient Temperature—The sensing head is designed Mechanical Installation
to operate in ambient temperatures from 0 to 70°C (32 All sensors come with a 1 m (3 ft) cable and 2 mount-
to 160°F). For ambient temperatures above 70°C ing nuts. You can mount the sensor in brackets or
(160°F), a factory installed air/water-cooled housing cutouts of your own design, or you can use the fixed
option is available that allows operation in ambient and adjustable mounting bracket accessories. Figures
conditions up to 260°C (500°F) with water cooling. 5 through 7 show the mounting bracket accessories’
The air/water-cooled housing option comes with a and sensor’s dimensions.
high-temperature cable and integrated air purging.
Full R
Atmospheric Quality—Smoke, fumes, dust, and other
contaminants can coat the lens and cause erroneous ∅19 (.76)
temperature readings. We recommend using the air
purge collar accessory in these types of environments
to keep the lens clean. (The air/water-cooled housing 38
(1.5)
comes with integrated air purging.) 1.5 22
(.06) (.875)
Electrical Interference—To minimize electrical or elec-
tromagnetic interference or “noise,” mount the sensor 38
away from motors producing large step load changes. (1.5)
5
Wiring—Before installing, be sure to check the dis- (.196)
tance between the sensor and the monitoring/control- ∅5 (.196)
ling device. If necessary, extension cables are available
as accessories. 2X 45˚
2X 90˚ 38
Power—Have available a 12–24 VDC, 10 mA, power (1.5)
supply.
2X 13 19
(2X .5) (.75)
38
(1.5)
mm (inches)
Figure 5: Fixed Mounting Bracket
7 8
Air/Water-cooled Housing with integrated air purge—
41
(1.625)
5 The air/water-cooled housing option (Figure 8) allows
(.196)
22 ∅5 (.196)
the sensor to withstand ambient temperatures up to
(.875)
260° C (500° F) with water cooling and the high-temper-
2X 45˚ ature cable. (The high-temp cable is standard when the
2X 90˚ 38 housing is ordered as an option.) It has 1/8” NPT fit-
(1.5)
tings for water and air. Water temperature should be
59
(2.31)
15-30° C (60-86° F) for best performance. Chilled water
∅19 (.76)
below 10° C (50° F) is not recommended. Without the
Full R
2X 13 19 high-temperature cable, the sensor can withstand ambient
(.75)
(2X .5) temperatures only up to 105° C (220° F) with water cooling.
38
(1.5)
∅38 (1.5) ∅38 (1.5)
38
(1.5) mm (inches)
∅20 (0.8) 3/4"–16UNF 2A
Figure 6: Adjustable Mounting Bracket 13 flats
(0.5)
1 m (3 ft) 3/4"–16UNF 2A Front View Rear View
PVC Cable ∅17 (.67) M18 x 1 (if ordered metric)
∅4 (.17) 10 96 12
(0.39) (3.79) (0.45)
∅14 (.56) ∅19 (.75) 1/8" NPT fittings (3)
19 63 7
(.75) (2.48) (.27)
89
(3.5) mm (inches)
Figure 7: Sensor
6 ~ 25 ~ 13
(0.25) (~ 1) (~ 0.5)
25
(1) 118
(4.63)
137
(5.38)
mm (inches)
Figure 8: Air/Water-cooled Housing
9 10

5. Air Purge Collar—The air purge collar accessory Right Angle Mirror—The right angle mirror accessory
(Figure 9) is used to keep dust, moisture, and other (Figure 10) allows a perpendicular view of a target. It
contaminants away from the lens. It must be screwed may be used when space is limited or when you need
in fully. Air flows into the 10/32” fitting and out the to avoid excessive radiation to the sensor. This can be
front aperture. Clean or “instrument” air is recom- mounted either on the end of the sensor or on the air
mended. The air purge collar accessory is not needed with purge collar, but not on the air/water-cooled housing.
the air/water-cooled housing.
Note: When using the right angle mirror, a small
∅35
Inside threads M18 x 1
(if ordered with metric threaded sensor)
amount of energy emitted by the source is lost, which
(1.38)
results in a lower than actual temperature reading. To
∅19 (0.75) 3/4" – 16UNF 2A
compute the corrected temperature, use this formula:
10/32" threads
35
T = 1.035Tm – .035Tamb
(1.36)
where T=corrected temperature, Tm=temperature read-
~ 25 ing with mirror, and Tamb=ambient temperature. All
(~ 1)
61
11
(0.42) 9 temperatures are in either °C or °F.
(2.38) 21 (0.37)
(0.84) ∅20 (.8)
31
(1.21)
mm (inches) 3/4"–16 UNF 2B
Figure 9: Air Purge Collar
Table 3: Recommended Water and Air
Recommended
Cooling water supply
Temperature 15–30˚ C (60–86˚ F) 82
Flow rate 1.89 liters per min (0.5 gpm)
Pressure drop
(across unit only) < 0.69 bar (10 psi) 13
(.5)
Cooling air supply
Temperature < 30˚ C (< 86˚ F)
Flow rate 70.8 liters per minute (2.5 SCFM)
Pressure drop 20
(.8)
(across unit only) < 0.34 bar (5 psi)
Air purge air supply
Temperature < 30˚ C (< 86˚ F)
Flow rate 11.33 liters per minute (0.4 SCFM) 31
(1.25)
mm (inches)
Pressure drop
(across unit only) < 0.34 bar (5 psi)
Figure 10: Right Angle Mirror
11 12
Wiring—Wire the electronics cable using Figure 11 and
Electrical Installation Table 4 or 5 (for high temp cables) as a guide. USE
ONLY THE OUTPUT TYPE OF YOUR SENSOR.
Sensor to Electronics Cable—The sensor to electron- WIRING TO THE WRONG OUTPUT WILL DAM-
ics cable is a 1m (3 ft), 4-wire, PVC cable. One end is AGE THE SENSOR. Note in Figure 11 that the num-
attached, at the factory, to the sensor head. The bers refer to the wire numbers in Table 4 or 5, which
other end has two pairs of wires and a bare shield shows proper wiring connections based on insulation
(ground) wire (see Figure 11). color coding.
NOTE LABEL Wire Numbers
The unlabeled pair of wires is for connecting to a (ON POWER
(Refer to Table 4 or 5)
controller or chart recorder or for attaching to a ther- SUPPLY WIRES ONLY)
1
mocouple plug (for connecting to a thermocouple
2
meter). DO NOT CONNECT TO A POWER
SOURCE.
Red (+)
3
The second pair of wires, with the label, is for con-
necting to a power source. 4
12 – 24 VDC
5 (Shield)
WARNING Figure 11: Wiring Configuration
Incorrect wiring will cause severe, per- Table 4: Standard Cable Wiring
manent damage to the sensor.
Wire
Output Label Number Wire Color Function
Pay close attention to the wiring diagram in
Output 1 White Signal + (Iron)
Figure 11, and match your sensor to the appropri- J-type 2 Red (white stripe) Signal – (Constantan)
ate output type in Table 4 or 5. Wire accordingly. Thermo-
couple
Power 3 Red (yellow stripe) Power Supply +
Supply 4 Yellow Power Supply –
DO NOT CONFUSE OUTPUT WIRES WITH – 5 Bare Shield Ground
POWER SUPPLY WIRES. Output 1 Yellow Signal + (Chromel)
K-type 2 Red (yellow stripe) Signal – (Alumel)
Thermo- Power 3 Red (white stripe) Power Supply +
couple
Supply 4 White Power Supply –
– 5 Bare Shield Ground
Output 1 White Signal +
10mV/˚C 2 Green Signal Ground
Voltage Power 3 Red Power Supply +
Supply 4 Black Power Supply –
– 5 Bare Shield Ground
14
13

6. Table 5: High Temperature Cable Wiring OPERATION
Wire Once the sensor is in position and you have made sure
Output Label Number Wire Color Function
that the appropriate power, air, water, and cable con-
Output 1 White Signal + (Iron)
J-type 2 Red (white stripe) Signal – (Constantan) nections are secure, the system is ready for continuous
Thermo-
couple
Power 3 Red Power Supply + operation.
Supply 4 Yellow Power Supply –
– 5 Bare Shield Ground To operate, complete the following simple steps:
Output 1 Yellow Signal + (Chromel)
K-type 2 Red Signal – (Alumel) 1. Turn on the power supply.
Thermo-
Power 3 Red (white stripe) Power Supply +
couple Supply 4 White Power Supply – 2. Turn on the meter, chart recorder, or controller.
– 5 Bare Shield Ground
3. Read/monitor the temperature.
Output 1 Red Signal +
10mV/˚C 2 Yellow Signal Ground
Voltage Power 3 Red (white stripe) Power Supply +
Supply 4 White Power Supply – WARNING
– 5 Bare Shield Ground If using the air/water-cooled housing, do not
leave it in a heated environment with the
Extension Cables—Extension cables are available as coolant turned off. Damage to the sensor and to
accessories. Also available is a thermocouple connec- the housing can occur.
tion kit.
IMPORTANT MAINTENANCE AND
Be aware of the following when using the sensor: TROUBLESHOOTING
• If the sensor is exposed to significant changes in If your sensor is not performing as it should, try to
ambient temperature (hot to cold or cold to hot), match the symptom in Table 6 to its probable cause. If
allow 20 minutes for the temperature to stabilize the table does not help, call us at one of the phone
before taking or recording measurements. numbers listed on the last page.
• Do not operate the sensor near large electrical or Our customer service representatives are always at
magnetic fields (e.g., around arc welders or induc- your disposal for application assistance, calibration,
tion heaters). Electro-Magnetic Interference (EMI) repair, and solutions to specific questions or problems.
can cause measurement errors. Contact our Service Department before returning any
• Connectors or wires must be connected only to the equipment to us. In many cases, problems can be
appropriate input jacks or terminals. solved over the telephone.
15 16
Table 6: Troubleshooting
Symptom Probable Cause Solution
No output No power to sensor Check the power
supply
Erroneous Temp. Incorrect wire Check wire color
connection codes and reconnect Raytek Corporation
Worldwide Headquarters
Faulty sensor cable Verify cable continuity Box 1820, Santa Cruz, CA 95061-1820
Erroneous Temp.
Phone: (831) 458-1110 (800) 227-8074
FAX: (831) 458-1239
Erroneous Temp. Field of view Remove obstruction
obstruction
Raytek GmbH
European Headquarters
Lens Cleaning—Keep the lens clean at all times. Blow Phone: 49 30 478 0080
FAX: 49 30 471 0251
off loose particles (if not using the air purge accessory)
with clean compressed air, then carefully wipe surface Raytek do Brasil
with moist cotten swab (water or water-based glass South American Headquarters
Phone: 55 15 233 6338
cleaner). DO NOT use solvents. FAX: 55 15 233 6826
Raytek Mexico
CE CONFORMITY FOR THE Mexico, Caribbean, and Central America
Phone: 52 22 30 4380
EUROPEAN COMMUNITY FAX: 52 22 30 4438
Raytek Japan, Inc.
Phone: 81 3 3822 5715
FAX: 81 3 3822 5712
This instrument conforms to the following standards: Raytek China Company
Phone: 86 10 6437 0284
• EN50081-1:1992, Electromagnetic Emissions FAX: 86 10 6437 0285
• EN50082-1:1992, Electromagnetic Susceptibility Raytek UK Ltd.
Phone: 441 908 630800
Emission tests were conducted over a frequency range FAX: 441 908 630900
of 30–1000 MHz and susceptibility tests over a range Raytek France
of 27–500 MHz . The instrument’s average error in Phone: 33 1 64 53 1540
these frequency ranges is 1.0° C at an electric field FAX: 33 1 64 53 1544
strength of 3 V/m. At some frequencies the instru-
ment may not meet its stated accuracy.
17

7. CM
Noncontact Temperature Measurement for Industrial Applications & OEMs

8. CM Highlights Measurement Specifications
■ Scaleable 0-5 V, type J or K output Temperature Range -20ºC to 500ºC (-4ºF to 932ºF)
1,2
■ ide -20°C to 500°C (-4°F to 932°F)
W Accuracy (mV) ± 1.5% of reading or ± 2ºC, whichever is greater
temperature range Accuracy (t/c) ± 1.5% of reading or ± 4ºC, whichever is greater1,2,3
■ Rugged IP 65 (NEMA-4)
Spectral Response 8 to 14 microns
stainless steel housing
■ Rugged 13:1 optics at 90% energy System Repeatability ± 0.5% of reading or ± 2ºC, whichever is greater
■ 150 mSec (95%) response time Temperature Resolution 0.1°C
■ Alarm output
Response Time (95%) 150 mSec
■ ensor status/self diagnostic
S
Emissivity 0.10 to 1.10 (adjustable)
indicator LED
■ S232 digital communications for
R Transmissivity 0.10 to 1.00 (adjustable)
sensor set-up and monitoring Signal Processing Peak hold, valley hold, variable averaging
■ Adjustable signal processing
®
Self diagnostics/sensor status Normal operation, alarm, out of range, unstable,
■ DataTemp Multidrop
sensor fault
software compatible
■ ccessories for air purging and
Bore-Sight tolerance 4 3º @ focal point
A
1
lens protection Accuracy from -20 to 0ºC is ±3.5ºC
2
Accuracy and resolution specifications are valid for ambient temperature
The Raytek® CM sensor provides the 23ºC ± 5ºC, e = 1.0 calibration geometry
advantages of infrared temperature 3
Accuracy measured on the 0-5 VDC output or RS232 for t/c models is ± 1.5%
measurement in a powerful, compact,
of reading or ± 2ºC, whichever is greater
integrated sensor. Designed for easy
integration, the CM sensor can easily 4
Typical values measured at focal distance
replace traditional contact probes with a
J-type or K-type thermocouple output, or
with a user scaleable 0-5 volt output, if
your application is susceptible to noise.
The CM sensor is designed to measure
target temperatures ranging from -20°C
to 500°C (-4°F to 932°F). The CM's
onboard electronics are protected by a
rugged IP 65 (NEMA-4) stainless steel
housing, allowing the sensor to function
in ambient temperatures to 70°C (160°F)
without cooling. Nominal Optical Specifications
Although small in size, the CM is loaded
with advanced features. An RS232 digital D:S=13:1 at focal point Far field D:S=9:1
interface allows the user to configure all
programmable sensor variables with the
powerful DataTemp Multidrop software
included with each sensor. These include
a 24 volt DC alarm output triggered by
target temperature or head ambient
temperature, peak hold, valley hold or
variable averaging signal processing,
adjustable target emissivity settings and
adjustable window transmissivity setting.
The built-in sensor health LED provides
a convenient on-line indicator of the
sensor's operating status and aids in D:S is the optical resolution expressed as a ratio of the distance to the target
troubleshooting initial sensor set up. spot divided by the diameter of the spot.
Compact. Powerful. Easy to install. Nominal spot size based on 90% energy.
Affordable. The Raytek CM sensor is the
ideal solution for both OEM and end-user
applications.

9. Electrical Specifications
Analog Outputs Model specific Type J, Type K or
scaleable 0-5V voltage output
Cable Length (3.3 ft) standard
1m
3m (9.8 ft) cables optional
Thermocouple
Output Impedance 100 ohms
Voltage Output
Minimum Load Impedance 50K ohms
Power Supply 12–24 VDC ±20% @ 10mA
Digital Output 5
Accessories Options
Two-way RS232 digital output
5
Alarm Output Transistor, 24VDC ±20% 20mA
5
Digital output and alarm output share a common wire. Each CM sensor includes two mounting nuts, 1m (3.3ft.) of cable,
User selects either alarm output or RS232 communication and a quick start guide. 3m (9.8ft) cables are also available.
via Datatemp Multidrop software.
Sensor Specifications Adjustable or fixed
mounting bracket for
Environmental Rating IP 65 (NEMA-4) sensing head (XXXCIADJB
A bient Temperature Range 0ºC to 70°C (32ºF to 160°F)
m or XXXCIACFB)
Cable Temperature Range -30ºC to 105ºC (-22ºF to 220ºF)
Storage Temperature -20ºC to 85°C (-4ºF to 185°F)
Relative Humidity 10 to 95%, non-condensing
Shock IEC 68-2-27 (MIL STD 810D)
50 g’s, 11 mSec, any axis
Vibration IEC 68-2-27 (MIL STD 810D) ir purge jacket to keep lens
A
3 g’s, any axis, 11–200 Hz or right angle mirror clean
(XXXCMAP or XXXCMAPM
Weight 1m cable model: 145 g (5.1 oz)
for metric version)
Sensor Dimensions
Protective lens covering
(XXXCMACPW or XXXCMACPWM)
94
(3.7)
Right angle mirror to ease
installation into tight locations
(XXXCMACRA or XXXCMACRAM)

10. Model Description
RAYCMLT Raytek infrared temperature sensor
Code A Output
A B C J Type J Thermocouple Output
K Type K Thermocouple Output
RAYCMLT V Voltage Output (Linear, scaleable from 0-5V)
Code B Cable Length
Output Cable Housing
Length Thread 1M (3.3ft) Cable
3 3M (9.8ft) Cable
Code C Housing thread
Typical Model
RAYCMLTV3 Standard 0.75-16 UNF
Number
M 18 MX1 Metric
Accessory Dimensions
2
41 (0.08)
(1.625)
5
22 (.196)
(.875) 5 (.196)
2X 45º
40
2X 90º (1.52)
59 Full R
(2.31)
19 (.76)
2X 13 19 (.76)
Full R (2X .50)
19
(.75)
38 38
(1.5) (1.5)
1.5 22
39 (.06) (.875)
(1.54)
Adjustable Mounting Bracket 38
(1.5)
5
(.196)
Air purge collar 5 (.196)
2X 45∞
2X 90º 38
(1.5)
MI8 #1 21
3/4-16 UNF-2B (.83)
2X 13 19
(2X .5) (.75)
38
(1.5) mm (inches)
15.5
(.61)
Fixed Mounting Bracket
Protective Window Right angle mirror
The Worldwide Leader in Noncontact Temperature Measurement
Raytek Corporation
Worldwide Headquarters
Santa Cruz, CA USA
Tel: 1 800 227 8074 (USA and Canada, only)
www.raytek.com
1 831 458 3900
solutions@raytek.com
European Headquarters
Berlin, Germany France United Kingdom
Tel: 49 30 4 78 00 80 Tel: 0800 888 244 Tel: +44 1908 630 800
raytek@raytek.de info@raytek.fr ukinfo@raytek.com
China Headquarters
Beijing, China
Tel: 8610 6438 4691
info@raytek.com.cn
To find a Raytek office near you, please visit www.raytek.com
Worldwide Service
Raytek offers services, including repair and calibration.
For more information, contact your local office or e-mail support@raytek.com © 2009 Raytek Corporation (3449292 Rev. A) 4/2009
Raytek, the Raytek logo and Datatemp are registered trademarks of Raytek Corporation.
Specifications subject to change without notice.

11. ®
Raytek CM
Operator’s Manual

12. Contacts
Raytek Corporation
Santa Cruz, CA USA
Tel: +1 800 227 – 8074 or
+1 831 458 – 3900
Fax: +1 831 458 – 1239
solutions@raytek.com
Raytek GmbH
Berlin, Germany
Tel: +49 30 478008 – 0
Fax: +49 30 4710251
raytek@raytek.de
Fluke Beijing Service Center
Sales and technical support line (Raytek): (8610) 64384691
Service line: (8610) 4008103435
Service fax line: (8610) 65286307
Info@raytek.com.cn
United Kingdom Raytek Japan, Inc.
ukinfo@raytek.com info@raytekjapan.co.jp
France
info@raytek.fr
© Raytek Corporation.
Raytek is a registered trademark of Raytek Corporation.
All rights reserved. Specifications subject to change without notice.

13. WARRANTY
The manufacturer warrants this product to be free from defects in material and workmanship under
normal use and service for a period of two years from date of purchase except as hereinafter provided.
This warranty extends only to the original purchaser. This warranty shall not apply to fuses or batteries.
Factory calibration is warranted for a period of one year. The warranty shall not apply to any product that
has been subject to misuse, neglect, accident, or abnormal conditions of operation or storage. Should the
manufacturer be unable to repair or replace the product within a reasonable amount of time, purchaser’s
exclusive remedy shall be a refund of the purchase price upon return of the product.
In the event of failure of a product covered by this warranty, the manufacturer will repair the instrument
when it is returned by the purchaser, freight prepaid, to an authorized Service Facility within the
applicable warranty period, provided the manufacturer’s examination discloses to its satisfaction that the
product was defective. The manufacturer may, at its option, replace the product in lieu of repair. With
regard to any covered product returned within the applicable warranty period, repairs or replacement will
be made without charge and with return freight paid by the manufacturer, unless the failure was caused
by misuse, neglect, accident, or abnormal conditions of operation or storage, in which case repairs will be
billed at a reasonable cost. In such a case, an estimate will be submitted before work is started, if
requested.
THE FOREGOING WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,
INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS, OR
ADEQUACY FOR ANY PARTICULAR PURPOSE OR USE. THE MANUFACTURER SHALL NOT BE LIABLE FOR
ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES, WHETHER IN CONTRACT, TORT, OR
OTHERWISE.

14. T ABLE OF C ONTENTS
1 Safety Instructions............................................................................................................................................................... 1
2 Description .............................................................................................................................................................................. 2
3 Technical Data ....................................................................................................................................................................... 3
3.1 PARAMETERS .....................................................................................................................................................3
3.2 OPTICAL DIAGRAM .............................................................................................................................................4
3.3 SCOPE OF DELIVERY ..........................................................................................................................................4
4 Basics ........................................................................................................................................................................................ 5
4.1 MEASUREMENT OF INFRARED TEMPERATURE ..................................................................................................5
4.2 SIGHT..................................................................................................................................................................5
4.3 AMBIENT TEMPERATURE ....................................................................................................................................5
4.4 ATMOSPHERIC QUALITY .....................................................................................................................................5
4.5 ELECTRICAL INTERFERENCE ..............................................................................................................................6
4.6 EMISSIVITY OF TARGET OBJECT ........................................................................................................................6
5 Install and Operation........................................................................................................................................................... 7
5.1 DIMENSIONS OF SENSOR ...................................................................................................................................7
5.2 MECHANICAL INSTALLATION...............................................................................................................................7
5.3 CABLE .................................................................................................................................................................8
5.4 WIRE CONNECTION ............................................................................................................................................8
5.4.1 Analog output ........................................................................................... 8
5.4.2 Alarm output ............................................................................................. 8
5.5 LED INDICATOR AND BLINK MODE ......................................................................................................................9
6 Software.................................................................................................................................................................................. 10
7 Accessories .......................................................................................................................................................................... 11
7.1 OVERVIEW ........................................................................................................................................................11
7.2 FIXED MOUNTING BRACKET .............................................................................................................................12
7.3 ADJUSTABLE MOUNTING BRACKET..................................................................................................................12
7.4 AIR PURGE COLLAR .........................................................................................................................................13
7.5 RIGHT ANGLE MIRROR .....................................................................................................................................14
7.6 PROTECTIVE WINDOW .....................................................................................................................................14
8 Programming........................................................................................................................................................................ 15
8.1 GENERAL COMMAND STRUCTURE ...................................................................................................................15
8.2 DEVICE SETUP .................................................................................................................................................15
8.2.1 Temperature Calculation ...................................................................... 15
8.2.2 Post Processing..................................................................................... 15
8.3 DYNAMIC DATA .................................................................................................................................................16
8.4 DEVICE CONTROL ............................................................................................................................................16
8.4.1 Controlling the output for the target temperature.............................. 16
8.4.2 Analog output, scaling .......................................................................... 16
8.4.3 Alarm output ........................................................................................... 16
8.4.4 Factory default values........................................................................... 16
9 Maintenance.......................................................................................................................................................................... 17
9.1 TROUBLESHOOTING MINOR PROBLEMS ..........................................................................................................17
9.2 ERROR CODES .................................................................................................................................................17
9.3 AUTOMATIC ERROR INDICATION ......................................................................................................................17
9.4 CLEANING THE LENS ........................................................................................................................................18
9.5 REPLACING A PROTECTIVE WINDOW ...............................................................................................................18
10 Appendix.............................................................................................................................................................................. 19
10.1 DETERMINATION OF EMISSIVITY ....................................................................................................................19
10.2 TYPICAL EMISSIVITY VALUES .........................................................................................................................19
10.3 COMMAND SET ...............................................................................................................................................22

15. Operation Manual
1 Safety Instructions
This document contains important information, which should be kept at all times with the instrument during its
operational life. Other users of this instrument should be given these instructions with the instrument. Eventual
updates to this information must be added to the original document. The instrument can only be operated by trained
personnel in accordance with these instructions and local safety regulations.
Acceptable Operation
This instrument is intended only for the measurement of temperature. The instrument is appropriate for continuous
use. The instrument operates reliably in demanding conditions, such as in high environmental temperatures, as long
as the documented technical specifications for all instrument components are adhered to. Compliance with the
operating instructions is necessary to ensure the expected results.
Unacceptable Operation
The instrument should not be used for medical diagnosis.
Replacement Parts and Accessories
Use only original parts and accessories approved by the manufacturer. The use of other products can compromise
the operational safety and functionality of the instrument.
Instrument Disposal
Disposal of old instruments should be handled according to professional and environmental regulations as electronic
waste.
Operating Instructions
The following symbols are used to highlight essential safety information in the operating instructions:
Helpful information regarding the optimal use of the instrument.
Warnings concerning operation to avoid instrument damage.
Warnings concerning operation to avoid personal injury.
Pay particular attention to the following safety instructions.
Use in 110 / 230 V electrical systems can result in electrical hazards and personal injury if not
properly protected. All instrument parts supplied by electricity must be covered to prevent
physical contact and other hazards at all times.
1 Raytek CM

16. Operation Manual
2 Description
The CM miniature infrared sensors are high performance noncontact infrared temperature measurement
systems. They measure the amount of energy emitted from an object accurately and repeatedly and
convert the energy into temperature signal.
The following analog outputs are available by different model:
• 0-5Volt
• J -Thermocouple
• K-Thermocouple
The LED on the back of CM shows the status of units.
RAYCMLT * #
Output Cable Length Thread
Model Description
RAYCMLT Raytek infrared temperature sensor
* Output
V Voltage Output (Linear, scaleable from 0-5V)
J Type J Thermocouple output
K Type K Thermocouple output
# Cable Length
1M (3.3ft) Cable
3 3M (9.8ft) Cable
Thread
UNF thread
M metric thread
Typical Model
Number RAYCMLTV3
Raytek CM 2

17. Operation Manual
3 Technical Data
3.1 Parameters
Temperature range (℃) -20 … 500℃
Temperature range (℉) -4 … 932℉
Optical resolution 13:1 @ 150mm (90% energy)
Spectral response 8 … 14μm
Thermal Parameters
Accuracy(Digital and Voltage)* ±1.5% of reading or ±2℃, whichever is greater
Accuracy (TC)* ±1.5% of reading ±2℃ ,or ±4℃, whichever is greater
Repeatability(Digital and Voltage) ±0.5% of reading or ±1℃, whichever is greater
Repeatability(TC) ±0.5% of reading ±1℃ ,or ±2℃, whichever is greater
Response time (95% energy) 150 ms
Temperature resolution 0.1℃ (0.2℉)
Emissivity 0.100 … 1.100 (adjustable)
Transmissivity 0.100 … 1.000 (adjustable)
Electrical Parameters
Digital Output ** Two-way RS232 digital output
Analog Output 0 to 5 V or TCJ or TCK output
Alarm Output ** Transistor, 24VDC @ 20mA
Power 24VDC± 20% @ 20mA
General Parameters
Environmental rating IP 65 (NEMA-4x)
Ambient operating range -10 to 70℃
Storage temperature -20 to 85℃
Dimensions / Weight L: 94 mm; Ø: 19 mm / 200g
Specifications subject to change without notice.
*Accuracy(Digital and Voltage) from –20 to 0℃ is ± 3.5℃.
Accuracy(TC) from –20 to 0℃ is ± 5.5℃.
Accuracy measured at ambient temperature 23℃±5℃, e = 0.95 and calibration geometry.
** RS232 TxD and Alarm output share one single wire. Either can be selected by DataTemp or RS232 command.
Declaration of Conformity for the European Community
This instrument conforms to the following standards:
EMC: EN61326‐1:2006
Safety: EN61010‐1:2001
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18. Operation Manual
3.2 Optical Diagram
D: S @ focus point= 13:1 / 11.5mm @ 150mm
D = Distance from sensor to target
S = Spot Diameter (@90% energy)
DISTANCE: SENSOR TO OBJECT(mm)
SPOT DIA.（mm）
D:S
SPOT DIA.（in）
DISTANCE: SENSOR TO OBJECT(in)
Figure 1: How to read the optical diagram
Calculating the Target Spot Size
To calculate the target spot size from two known points within an
optical diagram the following formula can be used:
⎡ (D − D n ) ⎤
S x = Sn + ⎢ x ⋅ (Sf − S n )⎥
⎣ (D f − D n ) ⎦
Sx = unknown diameter of target spot
Sn = smallest known diameter of target spot
Sf = greatest known diameter of target spot
Dx = distance to unknown target spot
Dn = distance to smaller known target spot
Df = distance to greater known target spot
3.3 Scope of Delivery
All models are provided with:
Mounting nuts
Support software CD
Quickstart Guide
Raytek CM 4

19. Operation Manual
4 Basics
4.1 Measurement of Infrared Temperature
Everything emits an amount of infrared radiation according to its surface temperature. The intensity of the
infrared radiation changes according to the temperature of the object. Depending on the material and
surface properties, the emitted radiation lies in a wavelength spectrum of approximately 1 to 20 µm. The
intensity of the infrared radiation (”heat radiation”) is dependent on the material. For many substances this
material-dependent constant is known. It is referred to as the ”emissivity value”, see 10.2 Typical Emissivity
Values
on page 19.
Infrared thermometers are optical-electronic sensors. These sensors are able to detect ”radiation of heat”.
Infrared thermometers are made up of a lens, a spectral filter, a sensor, and an electronic signal-
processing unit. The task of the spectral filter is to select the wavelength spectrum of interest. The sensor
converts the infrared radiation into an electrical parameter. The connected electronics generate electrical
signals for further analysis. As the intensity of the emitted infrared radiation is dependent on the material,
the required emissivity can be selected on the sensor.
The biggest advantage of the infrared thermometer is its ability to measure in the absence of contact.
Consequently, surface temperatures of moving or hard to reach objects can easily be measured.
4.2 Sight
To assure the target is bigger than the spot size, the distance between the sensor and the target should
be nearer for a smaller target. Refer to the diagram below.
Best Good Incorrect
Sensor
Target greater
than spot size
Target equal Background
to spot size
Target smaller
than spot size
Figure 2: Proper Sensor Placement
4.3 Ambient Temperature
The sensing head should work under ambient operating range in Technical Data.
4.4 Atmospheric Quality
In order to prevent damage to the lens and erroneous readings, the lens should always be protected from dust,
smoke, fumes, and other contaminants. For this purpose an air purge collar is available. You should only use oil free,
clean “instrument“ air.
5 Raytek CM

20. Operation Manual
4.5 Electrical Interference
To minimize electrical or electromagnetic interference, follow these precautions:
Mount the sensor as far away as possible from possible sources of interference such as motorized equipment
producing large step load changes.
Ensure a fully insulated installation of the sensor (Avoid ground loops!).
Make sure the shield wire in the sensor cable is earth grounded at one location.
Don’t connect 24V power wire directly to the power network to avoid possible noise effect from it.
4.6 Emissivity of Target Object
Determine the emissivity of the target object as described in appendix 10.1 Determination of Emissivity on
page 19. If emissivity is low, measured results could be falsified by interfering infrared radiation from
background objects (such as heating systems, flames, fireclay bricks, etc. close beside or behind the
target object). This type of problem can occur when measuring reflecting surfaces and very thin materials
such as plastic films and glass.
This measuring error when measuring objects with low emissivity can be reduced to a minimum if
particular care is taken during installation, and the sensing head is shielded from these reflecting radiation
sources.
Raytek CM 6

21. Operation Manual
5 Install and Operation
5.1 Dimensions of Sensor
All sensors and accessories are supplied with 3/4-16 UNF-2A or M18x1 thread
Figure 3: Dimensions of sensor
5.2 Mechanical Installation
All sensors come with a 1.0m (39inch) cable or 3.0m (117inch) and 2 mounting nuts. You can mount the sensor in
brackets or cutouts of your own design, or you can use the mounting bracket accessories.
Figure 4: sensor with fixed mounting bracket
7 Raytek CM

22. Operation Manual
5.3 Cable
The color code of the cable and 6 conductors* are shown in the following table.
8 1 2 3 4 5 6
Outer Power+ Power-** RxD TxD/Alarm TC+/mV+ TC-/mV-
Jacket
J brown white red
K yellow orange black blue violet yellow red
0- grey yellow brown
5V
* 7: shield
**RS232’s Ground should be connected to Power-
Table 1: Sensor Wiring Color Code
5.4 Wire Connection
Figure 5: connection diagram
5.4.1 Analog output
There are 3 models available: 0-5V, TC J, TC K.
Minimum load impedance for 0-5V output should be 50kΩ.
Inner impedance of TC output circuit is 100Ω.
5.4.2 Alarm output
RS232 TxD and alarm output share one single wire. Either can be selected by the DataTemp software or RS232
command. When alarm mode is active, the CM can receive command from a PC via RS232, but can’t respond to the
PC. RS232 TxD can work normally after the alarm output is switched off by command K=0, see 10.3 Command Set
on page 22.
If unit is set by DataTemp, alarm output is valid only after the unit is restarted.
Raytek CM 8

23. Operation Manual
5.5 LED indicator and blink mode
You can easily find the unit health status by the following LED blink mode.
CM status LED blink LED status
normal slow blink 1 ○
alarm fast blink ○ ○ ○ ○ ○ ○ ○ ○
out of range double blink ○ ○○○○○ ○ ○○○○○
unstable* slow blink 2 ○○○ ○○○ ○○○ ○○○
alarm fault** always lighting
*unstable is typically caused by head ambient temperature fluctuations due to initial warm up or thermal shock
situations.
** alarm fault indicates the input of sensor’s alarm port is over current.
Table 2: LED blink mode
9 Raytek CM

24. Operation Manual
6 Software
Raytek DataTemp Multidrop software allows the configuration and monitoring of CM sensor operating parameters,
such as:
Emissivity
Transmissivity
Averaging
Peak hold
Valley hold
Temperature scale of analog output
Alarm temperature value
1 point field calibration offset
Alarm output
Refer to DataTemp software manual (on the software CD) for more detail.
Notes for CM sensors:
1. Use the Temperature unit in Degree C for field calibration, if in Degree F, there is no effect.
2. CM shares the alarm line with the RS232 TxD and the alarm function will be temporarily turned off and changed
to RS232 mode when connecting to the DataTemp software. After re-powering the sensor without connecting to
the DateTemp software, the alarm mode will function normally.
Raytek CM 10

25. Operation Manual
7 Accessories
7.1 Overview
For all models:
Fixed Mounting Bracket XXXCIACFB
Adjustable Mounting Bracket XXXCIADJB
Air Purge Collar XXXCMACAP, XXXCMACAPM
Right Angle Mirror XXXCMACRA, XXXCMACRAM
Protective Window XXXCMACPW, XXXCMACPWM
Adjustable Mounting Bracket
Air Purge Collar
Fixed Mounting
Bracket
Protective Window
Right Angle Mirror
Figure 6: Overview of available accessories
11 Raytek CM

26. Operation Manual
7.2 Fixed Mounting Bracket
Figure 7: Dimensions of Fixed Mounting Bracket
7.3 Adjustable Mounting Bracket
Figure 8: Dimensions of Adjustable Mounting Bracket
Raytek CM 12

27. Operation Manual
7.4 Air Purge Collar
The Air Purge Collar is used to keep dust, moisture, airborne particles, and vapors away from the lens. It
can be mounted before or after the bracket. It has the push-in fitting. A 4mm outside diameter plastic
tubing is recommended to connect the fitting. Air flows into the fitting and out the front aperture. The
pressure of air should be between 0.6 and 1 bar. Clean, oil free air is recommended.
Figure 9: Dimensions of Air Purge Collar
13 Raytek CM

28. Operation Manual
7.5 Right Angle Mirror
The Right Angle Mirror is used to turn the field of view by 90° against the sensor axis. It is recommended when space
limitations or excessive radiation do not allow for direct alignment of the sensor to the target. The mirror must be
installed after the bracket and after the Air Purge Collar and screwed in fully. In dusty or contaminated environments,
air purging is required to keep the mirror surface clean.
Figure10: Dimension of Right Angle Mirror
When using the Right Angle Mirror, adjust the emissivity or transmissivity settings downward by
5%. For example, for an object with an emissivity of 0.65, you adjust the value down to 0.62. Or,
you can keep the emissivity 0.65 and adjust the transmissivity from 1.0 to 0.95. This correction
accounts for energy losses in the mirror.
7.6 Protective Window
Determination of transmissivity of an unknown protective window:
If transmissivity of the measuring screen is not indicated on the data sheet, you can also determine the transmissivity
yourself. Please proceed as follows:
1. Measure the temperature of the target object with the sensing head, without using the protective window. Note
correct setting of emissivity.
2. Insert the protective window in the sensing head.
3. Adjust the transmissivity in the software until the same temperature is displayed, as it was determined without
the protective window.
For more information regarding the mounting of a protective window, see 9.5 Replacing a Protective Window
on page 18.
Raytek CM 14

29. Operation Manual
8 Programming
8.1 General Command Structure
Requesting a parameter
?ECR “?“ is the command for “Request“
“E“ is the parameter requested
“CR“ (carriage return, 0Dh) is closing the request.
It is possible to close with “CRLF“ (0D0Ah), but “LF” (0Ah) is not necessary.
Setting a parameter (Poll Mode)
The parameter will be stored into the device flash memory.
E=0.975CR “E“ is the parameter to be set
“=“ is the command for “set a parameter“
“0.975“ is the value for the parameter
“CR“ (carriage return, 0Dh) is closing the request
It is possible to close with “CRLF” (0D0Ah), but “LF” (0Ah) is not necessary.
Setting a parameter without writing it into the device flash memory.
This function is for test purposes only.
E#0.975CR “E“ is the parameter to be set
“#“ is the command for “set parameter without writing it into the Flash“
“0.975“ is the value for the parameter
“CR“ (carriage return, 0Dh) is closing the request.
It is possible to close with “CRLF” (0D0Ah), but “LF” (0Ah) is not necessary.
Device response format:
!E0.975CRLF “!“ is the parameter for “Answer“
“E“ is the Parameter
“0.975“ is the value for the parameter
“CRLF“ (0D0Ah) is closing the answer.
Error message
*Syntax Error “*“ is the character for “Error“
8.2 Device Setup
8.2.1 Temperature Calculation
U=C Physical Unit for the temperature value
E=0.950 Emissivity setting
XG=1.000 Setting for transmission
For the calculation of the temperature value, it is possible to set an offset (relative number to be added to the
temperature value).
DO=-0.3 Offset adjustment -0.3 for the temperature signal
8.2.2 Post Processing
The following parameters can be set to determine the post-processing mode
P=5 maximum hold, hold time: 5 sec
F=12.5 minimum hold, hold time: 12.5 sec
G=10 averaging, average time (90%): 10 sec
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30. Operation Manual
8.3 Dynamic Data
To request the dynamic data, the following commands are available:
?T Target temperature
?I Detector ambient temperature
?XJ Temperature of Thermocouple cold end (only valid for TC)
?Q energy value of the target temperature
To check for resets (e.g. power shut down) use the command XI. Notice, after a reset the unit is re- initialized.
?XI asks for the reset status
!XI0 no reset occurred
!XI1 a reset occurred, new initialization of the unit
XI=0 sets the reset status back to 0
8.4 Device Control
8.4.1 Controlling the output for the target temperature
The output can provide a predefined value of full analog range when signal output is 0-5V.
?XO Request for the output mode
O=25 output of a constant voltage at 1.25 V (25% of 0-5 V)
O=255 switches back to the temperature controlled output
8.4.2 Analog output, scaling
According to the temperature range of the model, it is possible to set the maximum voltage value according to a
temperature value (e.g., the maximum voltage (5V) shall represent 200℃). The same setting is possible for the
minimum value.
H=500 the maximum voltage value is set to 500℃
L=0 the minimum voltage value is set to 0℃
You cannot set these values for thermocouple output.
The minimum span between the maximum / minimum settings is 20 K.
8.4.3 Alarm output
The alarm output can be activated by various temperature variables:
- Internal sensing head temperature (normally open N.O. or normally closed N.C.)
- Target temperature, to be set to N.C. (relay contacts are closed while in home position) or N.O. (relay
contacts are open while in home position)
K=0 alarm output disabled
K=4 Sensor head ambient temperature lower than threshold, relay N.O.
K= 2, XS=125.3 Target temperature lower than threshold, relay N.O., threshold
setting to 125.3℃(if U=C is set)
8.4.4 Factory default values
It is possible to reset the unit to the original factory default values.
XF factory default values will be set
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31. Operation Manual
9 Maintenance
Our customer service representatives are always at your disposal for any questions you might have. This service
includes any support regarding the proper application of your infrared measuring system, calibration or the solution to
customer-specific solutions as well as repair.
In many cases your problems will be application-specific and can possibly be solved over the telephone. So, if you
need to return equipment to us, please contact our Service Department before doing so. See phone and fax
numbers at the beginning of this document.
9.1 Troubleshooting Minor Problems
Symptom Possible Cause Solution
No Output Cable Disconnected Check Cable Connections
Erroneous Temperature Field of View Obstructed Remove the Obstruction
Erroneous Temperature Lens Dirty Clean the Lens
Erroneous Temperature Wrong Emissivity Setting Correct the Setting
Temperature Fluctuates Wrong Signal Processing Correct Peak, Valley, or Average Settings
Table 3: Troubleshooting
9.2 Error Codes
Error Codes (via RS232)
Output Error Code Description
T Temperature over range
T Temperature under range
Table 4: Error Codes (via RS232)
9.3 Automatic Error Indication
The automatic error indication (alarm output) shall warn the user and guarantee a secure output in the event of a
system error. In the first place, however, its task is to switch the system off in case of a faulty setup or a defect in the
sensing head or in the electronic circuits.
Never rely exclusively on the automatic error indication when monitoring critical heating processes. It is
strongly recommended to take additional safety measures.
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32. Operation Manual
9.4 Cleaning the Lens
Care should be taken to keep the lens clean. Any foreign matter on the lens will affect the accuracy of the
measurements. Be sure to take care when cleaning the lens. Please observe the following:
1. Blow off loose particles with clean air.
2. Gently brush off remaining particles with a soft camel hair brush.
3. To remove any severe contamination, use a clean, soft cloth dampened with distilled water. In any
case, do not scratch the lens surface!
For fingerprints or other grease, use any of the following:
Denatured alcohol
Ethanol
Kodak lens cleaner
Apply any of the above to the lens. Wipe gently with a clean, soft cloth until you see colors on the lens surface, then
allow to air dry. Never wipe the surface dry - this may scratch the surface. If the lens is contaminated with silicones
(e.g. from hand creams), clean it carefully using Hexane. Allow the lens to air dry.
Do not use any ammonia or any cleaners containing ammonia to clean the lens. This may result
in permanent damage to the lens’ surface.
9.5 Replacing a Protective Window
The sensors contain a thread for ease in replacing the protective window..
The window material is placed in a metal ring with a thread with an inner rubber gasket. This rubber gasket
hermetically seals the sensor against atmospheric contaminants.
Replace the protective window using the special tool supplied with the spare window. Put the tool into the slot on the
window’s mounting ring. Now gently unscrew the protective window from its mount by turning to the left. Take care to
screw on the new protective window as tight as possible, but do not over tighten.
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10 Appendix
10.1 Determination of Emissivity
Emissivity is a measure of an object’s ability to absorb and emit infrared energy. It can have a value between 0 and
1.0. For example, a mirror has an emissivity of 0.1, while the so-called “Blackbody“ reaches an emissivity value of 1.0.
If a higher than actual emissivity value is set, the output will read low, provided the target temperature is above its
ambient temperature. For example, if you have set 0.95 and the actual emissivity is 0.9, the temperature reading will
be lower than the true temperature.
An object’s emissivity can be determined by one of the following methods:
1. Determine the actual temperature of the material using an RTD (PT100), a thermocouple, or any other suitable
method. Next, measure the object’s temperature and adjust emissivity setting until the correct temperature value
is reached. This is the emissivity for the measured material.
2. For relatively low temperatures (up to 260℃, 500℉), place a plastic sticker on the object to be measured. This
sticker should be large enough to cover the target spot. Next, measure the sticker’s temperature using an
emissivity setting of 0.95. Finally, measure the temperature of an adjacent area on the object and adjust the
emissivity setting until the same temperature is reached. This is the emissivity for the measured material.
3. If possible, apply flat black paint to a portion of the surface of the object. The emissivity of the paint must be
above 0.98. Next, measure the temperature of the painted area using an emissivity setting of 0.98. Finally,
measure the temperature of an adjacent area on the object and adjust the emissivity until the same temperature
is reached. This is the emissivity for the measured material.
10.2 Typical Emissivity Values
The following table provides a brief reference guide for determining emissivity and can be used when one
of the above methods is not practical. Emissivity values shown in the table are only approximate, since
several parameters may affect the emissivity of a material. These include the following:
1. Temperature
2. Angle of measurement
3. Geometry (plane, concave, convex)
4. Thickness
5. Surface quality (polished, rough, oxidized, sandblasted)
6. Spectral range of measurement
7. Transmissivity (e.g. thin films plastics)
8.
METAL Material Emissivity ( Spectral range 8~14µm)
Aluminum
Unoxidized 0.02-0.1
Oxidized 0.2-0.4
Alloy A3003, Oxidized 0.3
Roughened 0.1-0.3
Polished 0.02-0.1
Brass
Polished 0.01-0.05
Burnished 0.3
Oxidized 0.5
Chromium 0.02-0.2
Copper
Polished 0.03
Roughened 0.05-0.1
Oxidized 0.4-0.8
Gold 0.01-0.1
Haynes
Alloy 0.3-0.8
Inconel
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Oxidized 0.7-0.95
Sandblasted 0.3-0.6
Electropolished 0.15
Iron
Oxidized 0.5-0.9
Unoxidized 0.05-0.2
Rusted 0.5-0.7
Molten —
Iron, Cast
Oxidized 0.6-0.95
Unoxidized 0.2
Molten 0.2-0.3
Iron, Wrought
Dull 0.9
Lead
Polished 0.05-0.1
Rough 0.4
Oxidized 0.2-0.6
Magnesium 0.02-0.1
Mercury 0.05-0.15
Molybdenum
Oxidized 0.2-0.6
Unoxidized 0.1
Monel (Ni-Cu) 0.1-0.14
Nickel
Oxidized 0.2-0.5
Electrolytic 0.05-0.15
Platinum
Black 0.9
Silver 0.02
Steel
Cold-Rolled 0.7-0.9
Ground Sheet 0.4-0.6
Polished Sheet 0.1
Molten —
Oxidized 0.7-0.9
Stainless 0.1-0.8
Tin (Unoxidized) 0.05
Titanium
Polished 0.05-0.2
Oxidized 0.5-0.6
Tungsten 0.03
Polished 0.03-0.1
Zinc
Oxidized 0.1
Polished 0.02
Table 5: Typical Emissivity Values
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NON-METAL Material Emissivity ( Spectral range 8~14µm)
Asbestos 0.95
Asphalt 0.95
Basalt 0.7
Carbon
Unoxidized 0.8-0.9
Graphite 0.7-0.8
Carborundum 0.9
Ceramic 0.95
Clay 0.95
Concrete 0.95
Cloth 0.95
Glass
Plate 0.85
“Gob” —
Gravel 0.95
Gypsum 0.8-0.95
Ice 0.98
Limestone 0.98
Paint (non-al.) 0.9-0.95
Paper (any color) 0.95
Plastic (opaque, over 20 mils) 0.95
Rubber 0.95
Sand 0.9
Snow 0.9
Soil 0.9-0.98
Water 0.93
Wood, Natural 0.9-0.95
Table 6: Typical Emissivity Values
To optimize surface temperature measurements, consider the following guidelines:
Determine the object emissivity using the instrument that will also be used for the measurements.
Avoid reflections by shielding the object from surrounding temperature sources.
For higher temperature objects, use instruments with the shortest wavelength possible.
For translucent materials, such as plastic foils or glass, assure that the background is uniform and lower in
temperature than the object.
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36. Operation Manual
10.3 Command Set
FORMAT SET
Description char Format P S Example
Poll parameter ? ?X √ ?T
Set parameter = X= √ E=0.85
Set without
Save # X# √ E#0.85
FORMAT RESPONSE
Description char Format Example
Acknowledge ! !XXX !T020.0
Error message * *Syntax error
COMMAND LIST
Factory
Description Char Format P S Legal values default
Device
adjustment
gain** DG n.nnnn √ √ 0.8000~1.2000 1
Device
adjustment
offset ** DO nn.n √ √ -20.0~+20.0 ℃ 0
Device special
Info. DS XXX √ z.B. !DSRAY DSRAY
Emissivity
internal E n.nnn √ √ 0.100~1.100 0.95
0.100~998.9 secs
Valley hold time F nnn.n √ √ (999=infinite) 0
Average time G nnn.n √ √ 0.100~998.9 secs 0
Top of mV range H nnnn.n √ √ 0~500℃ 500
Sensor/head
ambient I nnn.n √ In current scale(℃/℉)
Relay alarm K n √ √
output control 0=Alarm Off
1=Alarm On
2=Target, normal open
3=Target, normal close
4=Head, normal open
5=Head, normal close
6=Over current protect *
Bottom of mV
range L nnnn.n √ √ -20~480℃ -20
Output O nnn √ √ 0-100=% of full range
voltage*** 255=controlled by unit
0.100~998.9 secs
Peak hold time P nnn.n √ √ (999=infinite) 0
Power Q nnnnn √
Target
temperature T nnnn.n √ In current scale(℃/℉)
Temperature
unit U X √ √ ℃/℉ C
Device bottom
range limit XB nnnn.n √ -20℃ -20
Restore factory
defaults XF √
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Transmission XG n.nnn √ √ 0.100~1.000 1
Device high
range limit XH nnnn.n √ 500℃ 500
Sensor XI n √ √ 1 after RESET
initialization 0 if XI=0
TC cold end
temperature XJ nnn.n √ In current scale(℃/℉)
Analog output XO n √
1=0-5V
mode
2=TCJ
3=TCK
FW revision XR √ e.g. 1.000
Setpoint/Relay
function XS nnnn.n √ √ -17.2~497.2℃ 497.2
Unit
identification XU √ e.g. !CMLTV
Serial number XV √ e.g. 00012345
* Poll only
** only available when unit is in ℃ mode
*** only available when unit is in mV mode
Table 7: Command set
23 Raytek CM