Optris GmbH
Ferdinand-Buisson-Str. 14
D – 13127 Berlin
GERMANY
Tel.: +49-30-500 197-0
Fax: +49-30-500 197-10
E-mail: info@optris.de
Internet: www.optris.com
CE-Conformity
The product complies with the following standards:
EMC: EN 61326-1:2006
(Basic requirements)
EN 61326-2-3:2006
Safety Regulations: EN 61010-1:2001
The product accomplishes the requirements of the EMC Directive 2004/108/EG
and of the Low Voltage Directive 2006/95/EG. This product is in conformity with
Directive 2011/65/EU of the European Parliament and of the Council of 8 June
2011 on the restriction of the use of certain hazardous substances in electrical and
electronic equipment.
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. References to other chapters are marked as [► ...].
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.
Air Purge Collar 22 Appendix A – Emissivity Table Metals 47
Mounting Brackets 23 Appendix B – Emissivity Table Non Metals 49
Rail Mount Adapter for Electronic box 24 Appendix C – Smart Averaging 50
Electrical Installation 25
Cable Connections 25
Ground Connection 28
Outputs and Inputs 30
Analog Outputs 30
Digital Interfaces 31
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PLEASE NOTE: Never use cleaning
compounds which contain solvents
(neither for the lens nor for the housing).
The CT XL sensing head is a sensitive optical system. Please use only the thread for mechanical
installation.
Avoid mechanical violence on the head – this may destroy the system (expiry of warranty).
Description
The sensors of the optris CT XL series are noncontact infrared temperature sensors.
They calculate the surface temperature based on the emitted infrared energy of objects [► Basics of Infrared Thermometry]. The sensor housing of the CT XL head is made of stainless steel (IP65/ NEMA-4
rating) – the sensor electronics is placed in a separate box made of die casting zinc.
Scope of Supply
CT XL sensing head with connection cable and electronic box
Mounting nut
Operators manual
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 water based
glass cleaner.
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Cautions
Avoid abrupt changes of the ambient temperature. In case of problems or questions which may arise when
you use the CT XL, please contact our service department.
Model Overview
The sensors of the CT XL series are available in the following basic versions:
Model Model codes Measurement range spectral typical applications
response
CT XL LT LT -50 to 975 °C 8-14 µm non-metallic surfaces
CT XL 3M 3ML 50 to 400 °C 2,3 µm metallic surfaces
3MH 100 to 600 °C 2,3 µm metallic surfaces
3MH1 150 to 1000 °C 2,3 µm metallic surfaces
3MH2 200 to 1500 °C 2,3 µm metallic surfaces
3MH3 250 to 1800 °C 2,3 µm metallic surfaces
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Smart Averaging means a
dynamic average adaptation at
high signal edges [activation via
software only].
[► Appendix C]
Factory Default Settings
The unit has the following presetting at time of delivery:
Signal output object temperature 0-5 V
Emissivity 0,970 [LT]
1,000 [3M]
Transmissivity 1,000
Averaging (AVG) 0,2 s [LT]
inactive [3M]
Smart Averaging inactive [LT], active [3M]
Peak hold inactive
Valley hold inactive
LT 3ML 3MH 3MH1 3MH2 3MH3
Lower limit temperature range [°C] 0 485 50 100 150 200 250
Upper limit temperature range [°C] 500 1050 400 600 1000 1500 1800
Lower alarm limit [°C] 30 100 250 350 550 600
(normally closed)
Upper alarm limit [°C] 100 300 500 600 1000 1400
(normally open)
Lower limit signal output 0 V
Upper limit signal output 5 V
Temperature unit °C
Ambient temperature compensation internal head temperature probe
(on LT output at OUT-AMB as 0-5 V signal)
Baud rate [kBaud] 115
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Technical Data
General Specifications
Sensing head Electronic box
Environmental rating IP65 (NEMA-4) IP65 (NEMA-4)
Ambient Temperature -20...85 °C -40...85 °C 1)
Storage temperature -40...85 °C -40...85 °C
Relative humidity 10...95%, non condensing 10...95%, non condensing
Material stainless steel die casting zinc
Dimensions 112 mm x 32 mm, M30x1 89 mm x 70 mm x 30 mm
Weight 120 g 420 g
Cable length 3 m (standard), 8 m, 15 m (8 and 15 m only available at LT)
Cable diameter 2,8 mm
Ambient temperature cable 180 °C max.
Vibration IEC 68-2-6: 3G, 11 – 200Hz, any axis
Shock IEC 68-2-27: 50G, 11ms, any axis
Software (optional) CompactConnect
1)
The functionality of the LCD display can be limited at ambient temperatures below 0 °C.
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Electrical Specifications
Power Supply 8–36 VDC
Current draw max. 100 mA
Outputs/ analog
Channel 1 selectable: 0/ 4–20 mA, 0–5/ 10 V, thermocouple (J or K) or alarm output
(Signal source: object temperature)
Channel 2 [LT only] Head temperature [-20...180 °C]
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 at Pin AL2 [24 V/ 50 mA]
Output impedances
mA max. loop resistance 500 Ω (at 8-36 VDC),
mV min. 100 KΩ load impedance
Thermocouple 20 Ω
Digital interfaces USB, RS232, RS485, CAN, Profibus DP, Ethernet (optional plug-in modules)
Relay outputs 2 x 60 VDC/ 42 VAC
Functional inputs F1-F3; software programmable for the following functions:
- external emissivity adjustment,
- ambient temperature compensation,
- trigger (reset of hold functions)
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Measurement Specifications [LT model]
LT
Temperature range (scalable) -50...975 °C
Spectral range 8...14 µm
Optical resolution 75:1
System accuracy
Repeatability 1) ±0,5°C or ±0,5% 3)
Temperature resolution (NETD) 0,1 °C
1) 2)
±1°C or ±1% 3)
3) 4)
Response time (90 % signal) 120 ms
Warm-up time 10 min
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 235 °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 100ms and an object temperature of 25 °C
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Measurement Specifications [3M models]
3ML 3MH
Temperature range (scalable) 50...375 °C 1) 100...600 °C 1)
Spectral range 2,3 µm 2,3 µm
Optical resolution 60:1 100:1
System accuracy
Repeatability 2) ±(0,1 % of reading +1 °C)
Temperature resolution 0,1 °C
Response time (90 % signal) 1 ms
2) 3)
±(0,3 % of reading +2 °C)
4)
0,1 °C
5)
1 ms
4)
4)
4)
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)
TObject > THead+25 °C
2)
at ambient temperature 235 °C
3)
Accuracy for thermocouple output: ±2,5°C or ±1%
4)
= 1/ Response time 1s
5)
with dynamic adaptation at low signal levels
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Measurement Specifications [3M models]
3MH1 3MH2 3MH3
Temperature range (scalable) 150...1000 °C 200...1500 °C 250...1800 °C
Spectral range 2,3 µm 2,3 µm 2,3 µm
Optical resolution 300:1 300:1 300:1
System accuracy
Repeatability 2) ±(0,1 % of reading +1 °C)
Temperature resolution 0,1 °C
Response time (90 % signal) 1 ms
2) 3)
±(0,3 % of reading +2 °C)
4)
0,1 °C
6)
1 ms
4)
6)
4)
4)
0,1 °C
1 ms
5)
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)
TObject > THead+25 °C
2)
at ambient temperature 235 °C
3)
Accuracy for thermocouple output: ±2,5°C or ±1%
4)
= 1/ Response time 1s
5)
at object temperatures > 300 °C
6)
with dynamic adaptation at low signal levels
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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.
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.
D = Distance from front of the sensing head to the object
S = Spot size
The D:S ratio is valid for the focus point.
Make sure to keep the optical path clear of any obstacles.
Mechanical Installation
The CT XL sensing heads are equipped with a metrical M30x1-thread and can be installed either directly via
the sensor thread or with help of the hex nut (included in scope of supply) to the mounting bracket available.
CT XL – Sensing head
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CT XL Electronics
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The needed amount of air
(approx. 2...10 l/ min.)
depends on the application
and the installation
conditions on-site.
Accesories
Air Purge Collar
The lens must be kept clean at all times from dust, smoke, fumes and other contaminants in order to avoid
reading errors. These effects can be reduced by using an air purge collar. Make sure to use oil-free,
technically clean air, only.
Air purge collar [ACCTXLAP]
Hose connection: 6x8 mm
Thread (Fitting): G 1/8 inch
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Mounting Brackets
Mounting bracket, adjustable Mounting bracket, adjustable in
in one axis [ACCTXLFB] two axes [ACCTXLAB]
With the help of this bracket the sensing head can be adjusted in two axes.
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Rail Mount Adapter for Electronic box
With the rail mount adapter the CT XL electronics can be mounted easily on a DIN rail (TS35) according
EN50022.
Rail Mount Adapter [ACCTRAIL]
► All accessories can be ordered using the according part numbers in brackets [ ].
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Electrical Installation
Cable Connections
For the electrical installation of the CT XL please open at first the cover of the electronic box (4 screws).
Below the display are the screw terminals for the cable connection.
Designation [model LT]
+8..36 VDC Power supply
GND Ground (0 V) of power supply
GND Ground (0 V) of internal in- and outputs
OUT-AMB Analog output head temperature (mV)
OUT-TC Analog output thermocouple (J or K)
OUT-mV/mA Analog output object temperature (mV or mA)
F1-F3 Functional inputs
AL2 Alarm 2 (Open collector output)
3V SW 3 VDC, switchable, for laser-sightingtool
GND Ground (0 V) for laser-sightingtool
BROWN Temperature probe head
WHITE Temperature probe head
GREEN Detector signal (–)
YELLOW Detector signal (+)
Opened LT electronic box
with terminal connections´
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CAUTION: Please do never connect a supply voltage to the analog outputs as this will destroy the
output!
The CT XL is not a 2-wire sensor!
Designation [model 3M]
+8..36VDC Power supply
GND Ground (0V) of power supply
GND Ground (0V) of internal in- and outputs
AL2 Alarm 2 (Open collector output)
OUT-TC Analog output thermocouple (J or K)
OUT-mV/mA Analog output object temperature (mV or mA)
F1-F3 Functional inputs
GND Ground (0V)
3V SW 3 VDC, switchable, for laser-sightingtool
GND Ground (0 V) for laser-sightingtool
BROWN Temperature probe head (NTC)
WHITE Head ground
GREEN Head power
YELLOW Detector signal
Opened 3M electronic box
with terminal connections
Power supply
Please use a power supply unit with an output voltage of 8–36 VDC which can supply 100 mA. The ripple
should be max. 200 mV.
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Use shielded cables only. The
sensor shield has to be grounded.
Cable Assembling
The cable gland M12x1,5 allows the use of cables with a diameter of 3 to 5 mm.
Remove the isolation from the cable (40 mm power supply, 50 mm signal outputs, 60 mm functional inputs).
Cut the shield down to approximately 5 mm and spread the strands out. Extract about 4 mm of the wire
isolation and tin the wire ends.
Place the pressing screw, the rubber washer and the metal washers of the cable gland one after the other
onto the prepared cable end. Spread the strands and fix the shield between two of the metal washers. Insert
the cable into the cable gland until the limit stop. Screw the cap tight.
Every single wire may be connected to the according screw clamps according to their colors.
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Ground Connection [LT models]
At the bottom side of the mainboard PCB you will find a connector (jumper) which has been placed from
factory side as shown in the picture [left and middle pin connected]. In this position the ground connections
(GND power supply/ outputs) are connected with the ground of the electronics housing.
To avoid ground loops and related signal interferences in industrial environments it might be necessary to
interrupt this connection. To do this please put the jumper in the other position [middle and right pin
connected].
If the thermocouple output is used the connection GND – housing should be interrupted generally.
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Ground Connection [3M models]
At the bottom side of the mainboard PCB you will find a connector (jumper) which has been placed from
factory side as shown in the picture [bottom and middle pin connected]. In this position the ground
connections (GND power supply/ outputs) are connected with the ground of the electronics housing.
To avoid ground loops and related signal interferences in industrial environments it might be necessary to
interrupt this connection. To do this please put the jumper in the opposite position [middle and top pin
connected].
If the thermocouple output is used the connection GND – housing should be interrupted generally.
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Output signal
Range
Connection pin on
CT XL board
Voltage
0 ... 5 V
OUT-mV/mA
Voltage
0 ... 10 V
OUT-mV/mA
Current
0 ... 20 mA
OUT-mV/mA
Current
4 ... 20 mA
OUT-mV/mA
Thermocouple
TC J
OUT-TC
Thermocouple
TC K
OUT-TC
According to the chosen output signal
different connection pins on the mainboard
are used.
(OUT-mV/mA or OUT-TC).
CAUTION: Please do never connect a supply voltage to
the analog outputs as this will destroy the output.
The CT XL is not a 2-wire sensor!
Outputs and Inputs
Analog Outputs
The CT XL has two analog output channels.
Output channel 1
This output is used for the object temperature. The selection of the output signal can be done via the
programming keys [► Operating]. The software allows the programming of output channel 1 as an alarm
output.
Output channel 2 [LT only]
The connection pin OUT-AMB is used for output of the head temperature [-20-180 °C as 0–5 V or 0–10 V
signal]. The software allows the programming of output channel 2 as an alarm output. Instead of the head temperature THead also the object temperature TObj or electronic box temperature
TBox can be selected as alarm source.
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Digital Interfaces
CT XL sensors can be optionally equipped with an USB-,
RS232-, RS485-, CAN Bus-, Profibus DP- or Ethernetinterface.
If you want to install an interface, plug the interface board
into the place provided, which is located beside the display.
In the correct position the holes of the interface match with
the thread holes of the electronic box. Now press the board
down to connect it and use both M3x5 screws for fixing it.
Plug the preassembled interface cable with the terminal
block into the male connector of the interface board.
The Ethernet interface requires at minimum 12 V supply voltage.
Please pay attention to the notes on the according interface manuals.
Relay Outputs
The CT XL can be optionally equipped with a relay output. The relay board will be installed the same way as
the digital interfaces.
A simultaneous installation of a digital interface and the relay outputs is not possible.
The relay board provides two fully isolated switches, which have the capability to switch
max. 60 VDC/ 42 VAC
, 0,4 A DC/AC. A red LED shows the closed switch.
RMS
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The switching thresholds are in accordance with the values for alarm 1 and 2 [► Alarms/ Visual Alarms].
The alarm values are set according to the ► Factory Default Settings.
To make advanced settings (change of low- and high alarm) a digital interface (USB, RS232) and the
software is needed.
Functional Inputs
The three functional inputs F1 – F3 can be programmed with the software only.
F1 (digital): trigger (a 0 V level on F1 resets the hold functions)
F2 (analog): external emissivity adjustment [0–10 V: 0 V ► =0,1; 9 V ► =1; 10 V ► =1,1]
F3 (analog): external compensation of ambient temperature/ the range is scalable via software
[0–10 V ► -40–900 °C / preset range: -20–200 °C]
F1-F3 (digital): emissivity (digital choice via table)
A non connected input represents:
F1=High | F2, F3=Low.
All alarms (alarm 1, alarm 2, output channel 1 and 2 if
used as alarm output) have a fixed hysterese of 2 K.
Both of these alarms will have effect on
the LCD color:
BLUE: alarm 1 active
RED: alarm 2 active
GREEN: no alarm active
Alarms
The CT XL has the following Alarm features:
Output channel 1 and 2 [channel 2 on LT only]
To activate the according output channel has to be switched into digital mode. For this purpose the software
CompactConnect is required.
Visual Alarms
These alarms will cause a change of the color of the LCD display and will also change the status of the
optional relays interface. In addition the Alarm 2 can be used as open collector output at pin AL2 on the
mainboard [24V/ 50mA].
From factory side the alarms are defined as follows:
For extended setup like definition as low or high alarm [via change of normally open/ closed], selection of
the signal source [TObj, THead, TBox] a digital interface (e.g. USB, RS232) including the software
CompactConnect is needed.
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Factory Default Setting
To set the CT XL back to the factory default settings, please
press at first the Down-key and then the Mode-key and keep
both pressed for approx. 3 seconds.
The display will show RESET for confirmation.
Pressing the Mode button again recalls the last called
function on the display. The signal processing features Peak
hold and Valley hold cannot be selected simultaneously.
Operating
After power up the unit the sensor starts an initializing routine for some seconds. During this time the display
will show INIT. After this procedure the object temperature is shown in the display. The display backlight
color changes according to the alarm settings [► Alarms/ Visual Alarms].
Sensor Setup
The programming keys Mode,Up and Down enable the user to set the sensor on-site. The current
measuring value or the chosen feature is displayed. With Mode the operator obtains the chosen feature, with
Up and Down the functional parameters can be selected – a change of parameters will have immediate
effect. If no key is pressed for more than 10 seconds the display automatically shows the calculated object
temperature (according to the signal processing).
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DisplayMode [Sample]Adjustment Range
142.3C
Object temperature (after signal processing) [142,3 °C]fixed
depending on model/ inactive at TCJ- and TCK-output
n 500.0
Upper limit temperature range [500 °C]
depending on model/ inactive at TCJ- and TCK-output
[ 0.00
Lower limit signal output [0 V]according to the range of the selected output signal
] 5.00
Upper limit signal output [5 V]according to the range of the selected output signal
U °C
Temperature unit [°C]
°C/ °F
| 30.0
Lower alarm limit [30 °C]
depending on model
|| 100.0
Upper alarm limit [100 °C]
depending on model
XHEAD
Ambient temperature compensation [head temperature]
XHEAD = head temperature/ -40,0 … 900,0 °C (for LT) as
fixed value for compensation/ returning to XHEAD (head
temperature) by pressing Up and Down together
M 01
Multidrop adress [1] (only with RS485 interface)
01 … 32
B 9.6
Baud rate in kBaud [9,6]
9,6/ 19,2/ 38,4/ 57,6/ 115,2 kBaud
S ON
Laser Sighting (3 VDC switch to connection pin 3V SW)
ON/ OFF This menu item appears on first position on 1M/ 2M/
3M models.
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MV5 ´ Selection of the Output signal. By pressing Up or Down the different output signals can be selected [► Outputs and Inputs].
E0.970 Setup of Emissivity. Pressing Up increases the value, Down decreases the value (also
valid for all further functions). The emissivity is a material constant factor to describe the
ability of the body to emit infrared energy [► Emissivity].
T1.000Setup of Transmissivity. This function is used if an optical component (protective window,
additional optics e.g.) is mounted between sensor and object. The standard setting is
1.000 = 100% (if no protective window etc. is used).
A 0.2Setup of Average time. In this mode an arithmetic algorithm will be performed to smoothen
the signal. The set time is the time constant. This function can be combined with all other
post processing functions. On 3M models the shortest value is 0,001 s (other models: 0,1 s)
and can be increased/ decreased only by values of the power series of 2
(0,002, 0,004, 0,008, 0,016, 0,032, ...).
If the value is set to 0.0 the display will show --- (function deactivated).
P----Setup of Peak hold. In this mode the sensor is waiting for descending signals. If the signal
descends the algorithm maintains the previous signal peak for the specified time.
After the hold time the signal will drop down to the second highest value or will descend by
1/8 of the difference between the previous peak and the minimum value during the hold time.
This value will be held again for the specified time. After this the signal will drop down with
slow time constant and will follow the current object temperature.
If the value is set to 0.0 the display will show --- (function deactivated).
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V---- Setup of Valley hold. In this mode the sensor waits for ascending signals. The definition of
the algorithm is according to the peak hold algorithm (inverted).
If the value is set to 0.0 the display will show --- (function deactivated).
Signal graph with P----
▬ TProcess with Peak Hold (Hold time = 1s)
▬ TActual without post processing
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u 0.0Setup of the Lower limit of temperature range. The minimum difference between lower and upper limit is 20 K. If you set the lower limit to a value ≥ upper limit the upper limit will be adjusted to [lower limit + 20 K] automatically.
n 500.0 Setup of the Upper limit of the temperature range. The minimum difference between upper and lower limit is 20 K. The upper limit can only be set to a value = lower limit + 20 K.
[ 0.00 Setup of the Lower limit of the signal output. This setting allows an assignment of a
certain signal output level to the lower limit of the temperature range. The adjustment range
corresponds to the selected output mode (e.g. 0-5 V).
] 5.00Setup of the Upper limit of the signal output. This setting allows an assignment of a
certain signal output level to the upper limit of the temperature range. The adjustment range
corresponds to the selected output mode (e.g. 0-5 V).
U °C Setup of the Temperature unit [°C or °F].
| 30.0 Setup of the Lower alarm limit. This value corresponds to Alarm 1 [► Alarms/ Visual
Alarms] and is also used as threshold value for relay 1 (if the optional relay board is used).
|| 100.0 Setup of the Upper alarm limit. This value corresponds to Alarm 2 [► Alarms/ Visual
Alarms] and is also used as threshold value for relay 2 (if the optional relay board is used).
XHEAD Setup of the Ambient temperature compensation. In dependence on the emissivity value
of the object a certain amount of ambient radiation will be reflected from the object surface.
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Especially if there is a big difference between the ambient temperature at the object and the head
temperature the use of Ambient temperature compensation is recommended.
To compensate this impact, this function allows the setup of a fixed value which represents
the ambient radiation.
If XHEAD is shown the ambient temperature value will be taken from the head-internal
probe.
To return to XHEAD please press Up and Down together.
M 01Setup of the Multidrop address. In a RS485 network each sensor will need a specific
address. This menu item will only be shown if a RS485 interface board is plugged in.
B 9.6 Setup of the Baud rate for digital data transfer.
S ON Activating (ON) and Deactivating (OFF) of an optional Sighting Laser
[► Further Accessories]. By pressing Up or Down a voltage of 3 VDC will be switched to
the 3V SW connection pin on the mainboard.
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Error messages
The display of the sensor can show the following error messages:
LT models:
OVER Object temperature too high
UNDER Object temperature too low
^^^CH Head temperature too high
vvvCH Head temperature too low
3M models:
1. Digit:
0x No error
1x Head temperature probe short circuit to GND
2x Box temperature too low
4x Box temperature too high
6x Box temperature probe disconnected
8x Box temperature probe short circuit to GND
2. Digit:
x0 No error
x2 Object temperature too high
x4 Head temperature too low
x8 Head temperature too high
xC Head temperature probe disconnected
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Minimum system requirements:
Windows XP, Vista, 7, 8
USB interface
Hard disc with at least 30 MByte free space
At least 128 MByte RAM
CD-ROM drive
You will find a detailed software manual on the CD.
Software CompactConnect
Installation
Insert the installation CD into the according drive on
your computer. If the autorun option is activated the
installation wizard will start automatically.
Otherwise please start CDsetup.exe from the CDROM. Follow the instructions of the wizard until the
installation is finished.
The installation wizard will place a launch icon on the desktop and in the start menu:
[Start]\Programs\CompactConnect.
If you want to uninstall the software from your system please use the uninstall icon in the start menu.
Main Features:
Graphic display for temperature trends and automatic data logging
for analysis and documentation
Complete sensor setup and remote controlling
Adjustment of signal processing functions
Programming of outputs and functional inputs
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Communication Settings
Serial Interface
Baud rate: 9,6...115,2 kBaud (adjustable on the unit or via software)
Data bits: 8
Parity: none
Stop bits: 1
Flow control: off
Protocol
All sensors of the CT XL series are using a binary protocol. Alternatively they can be switched to an ASCII
protocol. To get a fast communication the protocol has no additional overhead with CR, LR or ACK bytes.
ASCII protocol
To switch to the ASCII protocol you can use also the following command:
Decimal: 131
After power on of the CT XL sensor the flash mode is active. It means, changed parameter settings will be
saved in the CT XL-internal Flash-EEPROM and will be kept also after the sensor is switched off.
In case settings should be changed quite often or continuously the flash mode can be switched off by using
the following command:
Decimal: 112
HEX: 0x70
Data, Answer: byte 1
Result: 1 – Data will not be written into the flash memory
2 – Data will be written into the flash memory
If the flash mode is deactivated, all settings will only be kept as long as the unit is powered. If the unit is
switched off and powered on again all previous settings are lost.
The command 0x71 will poll the current status.
You will find a detailed protocol and command description on the software CD CompactConnect in the
directory: \Commands.
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Basics of Infrared Thermometry
Depending on the temperature each object emits a certain amount of infrared radiation. A change in the
temperature of the object is accompanied by a change in the intensity of the radiation. For the measurement
of “thermal radiation” infrared thermometry uses a wave-length ranging between 1 µ and 20 µm.
The intensity of the emitted radiation depends on the material. This material contingent constant is described
with the help of the emissivity which is a known value for most materials (see enclosed table emissivity).
Infrared thermometers are optoelectronic sensors. They calculate the surface temperature on the basis of
the emitted infrared radiation from an object. The most important feature of infrared thermometers is that
they enable the user to measure objects contactless. Consequently, these products help to measure the
temperature of inaccessible or moving objects without difficulties. Infrared thermometers basically consist of
the following components:
The specifications of the lens decisively determine the optical path of the infrared thermometer, which is
characterized by the ratio Distance to Spot size.
The spectral filter selects the wavelength range, which is relevant for the temperature measurement. The
detector in cooperation with the processing electronics transforms the emitted infrared radiation into electrical
signals.
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Emissivity
Definition
The intensity of infrared radiation, which is emitted by each body, depends on the temperature as well as on
the radiation features of the surface material of the measuring object. The emissivity (ε – Epsilon) is used as
a material constant factor to describe the ability of the body to emit infrared energy. It can range between 0
and 100 %. A “blackbody” is the ideal radiation source with an emissivity of 1,0 whereas a mirror shows an
emissivity of 0,1.
If the emissivity chosen is too high, the infrared thermometer may display a temperature value which is much
lower than the real temperature – assuming the measuring object is warmer than its surroundings. A low
emissivity (reflective surfaces) carries the risk of inaccurate measuring results by interfering infrared radiation
emitted by background objects (flames, heating systems, chamottes). To minimize measuring errors in such
cases, the handling should be performed very carefully and the unit should be protected against reflecting
radiation sources.
Determination of unknown Emissivities
► First, determine the actual temperature of the measuring object with a thermocouple or contact sensor.
Second, measure the temperature with the infrared thermometer and modify the emissivity until the
displayed result corresponds to the actual temperature.
► If you monitor temperatures of up to 380°C you may place a special plastic sticker (emissivity dots – part
number: ACLSED) onto the measuring object, which covers it completely. Now set the emissivity to 0,95
and take the temperature of the sticker. Afterwards, determine the temperature of the adjacent area on
the measuring object and adjust the emissivity according to the value of the temperature of the sticker.
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► Cove a part of the surface of the measuring object with a black, flat paint with an emissivity of 0,98. Adjust
the emissivity of your infrared thermometer to 0,98 and take the temperature of the colored surface.
Afterwards, determine the temperature of a directly adjacent area and modify the emissivity until the
measured value corresponds to the temperature of the colored surface.
CAUTION: On all three methods the object temperature must be different from ambient temperature.
Characteristic Emissivities
In case none of the methods mentioned above help to determine the emissivity you may use the emissivity
tables ►Appendix A and B. These are average values, only. The actual emissivity of a material depends on
the following factors:
temperature
measuring angle
geometry of the surface
thickness of the material
constitution of the surface (polished, oxidized, rough, sandblast)
spectral range of the measurement
transmissivity (e.g. with thin films)
The average function is generally used to smoothen the output signal. With the adjustable parameter time
this function can be optimal adjusted to the respective application. One disadvantage of the average function
is that fast temperature peaks which are caused by dynamic events are subjected to the same averaging
time. Therefore those peaks can only be seen with a delay on the signal output.
The function Smart Averaging eliminates this disadvantage by passing those fast events without averaging
directly through to the signal output.
Signal graph with Smart Averaging function Signal graph without Smart Averaging function
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