MI
Miniature Infrared Sensor
Operating Instructions
Rev. F 04/2006
54301
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Contacts
Europe
Raytek GmbH
USA
Raytek Corporation
13127 Berlin, Germany
Blankenburger Str. 135
Tel: +49 30 478008 – 0
+49 30 478008 – 400
Fax: +49 30 4710251
CA 95061 – 1820, Santa Cruz
1201 Shaffer Rd. PO Box 1820
Tel: +1 831 458 – 1110 or
+1 800 227 – 8074
Fax: +1 831 458 – 1239
United Kingdom
France
Tel: +44 1908 630800
Fax: +44 1908 630900
Tel: 0800 888 244
Raytek China Company
Beijing, China
Tel: +86 10 6439 2255
Fax: +86 10 6437 0285
Internet: http://www.raytek.com/
© Raytek Corporation.
Raytek, the Raytek Logo, and DataTemp are registered trademarks of Raytek Corporation.
All rights reserved. Specifications subject to change without notice.
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WARRANTY
The manufacturer warrants this instrument to be free from defects in
material and workmanship under normal use and service for the
period of two years from date of purchase. This warranty extends
only to the original purchaser. This warranty shall not apply to fuses,
batteries, or any product that has been subject to misuse, neglect,
accident, or abnormal conditions of operation.
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 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.
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TABLE OF CONTENTS
1 SAFETY INSTRUCTIONS............................................1
2 DESCRIPTION ...............................................................3
3 TECHNICAL DATA ......................................................4
5 INSTALLATION ..........................................................14
5.1.1 Distance to Object.............................................14
5.2.1 Sensor Head Cable ............................................15
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5.3.1 Signal Output................................................... 19
5.3.3 Thermocouple Output....................................... 22
5.4.1 Emissivity Setting (analog controlled) ............. 24
5.4.3 Ambient Background Temperature
Compensation ............................................................ 26
5.4.4 Trigger and Hold Function............................... 28
6 OPERATION................................................................. 34
6.4.1 Averaging ......................................................... 38
6.4.2 Peak Hold.......................................................... 40
6.4.3 Valley Hold ....................................................... 41
6.4.4 Advanced Peak Hold......................................... 42
6.4.5 Advanced Valley Hold ...................................... 43
6.4.6 Advanced Peak Hold with Averaging............... 43
7 OPTIONS....................................................................... 45
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8 ACCESSORIES .............................................................46
11 PROGRAMMING GUIDE .......................................66
11.4.1 Temperature Calculation ................................70
11.4.2 Emissivity Setting and Alarm Set points .......70
11.4.3 Post Processing ...............................................72
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11.6.2 Analog Output, Scaling ................................. 73
11.6.3 Alarm Output................................................. 73
11.6.4 Factory default values..................................... 73
11.6.7 Changing the Sensing Head Calibration Data74
11.6.8 Ambient Background Temperature
Compensation ............................................................ 74
12 APPENDIX................................................................... 81
INDEX ............................................................................... 87
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Safety Instructions
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 should 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.
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Safety Instructions
Operating Instructions
The following symbols are used to highlight essential safety
information in the operation 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 VAC 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.
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Description
2 Description
The miniature infrared sensors MI are noncontact infrared
temperature measurement systems. They accurately and repeat ably
measure the amount of energy emitted from an object and convert
that energy into a temperature signal.
The following outputs are available:
•
•
•
•
•
•
•
J‐Thermocouple
K‐Thermocouple
0 ‐ 5 Volt
0 ‐ 20 mA or 4 ‐ 20 mA
10 mV / °C head ambient temperature signal
RS232 interface
optional: RS485 interface
The sensing head is protected by a rugged IEC 529 (IP 65, NEMA‐4)
stainless steel housing, and is connected to the electronic box with a
1 m (3 ft) cable. Longer cables must be ordered as an option. The
electronic box is separated from the sensing head. This allows the
sensing head to be used in hot environments up to 180°C (356°F)
without cooling. The electronic box can only be used in ambient
temperatures up to 65°C (150°F).
MI will allow sensing heads to be interchanged by programming in
the unique calibration data associated with different heads. Take
special care for the sensing head calibration data printed on the cable!
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Technical Data
3 Technical Data
3.1 Measurement Specifications
Temperature Range
LT
‐40 to 600°C (‐40 to 1112°F)
for J‐Thermocouple: ‐25 to 600°C (‐13 to 1112°F)
Spectral Response
LT
8 to 14 μm
Response Time
All models
150 ms (95% response)
Accuracy
LT
± 1% or ± 1°C (± 2°F) whichever is greater
± 2°C (± 4°F) for target temp. < 20°C (68°F)
± 1% or ± 2.5°C (± 5°F) whichever is greater
LT
TC outputs
At ambient temperature 23°C ±5°C (73°F ±9°F)
Repeatability
All models
± 0.5% or ± 0.5°C (± 1°F) whichever is greater
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Technical Data
Temperature Resolution
LT ± 0.1 K (± 0.2°F)*
± 0.25 K (± 0.5°F)**
* For a zoomed temperature span of 300°C (600°F)
** For the full temperature range of the unit
Temperature Coefficient
MIC
± 0.05 K per K or ± 0,05% / K whichever is
greater, at ambient: 23 to 125°C (73 to 185°F)
MIH
± 0.05 K per K or ± 0,05% / K whichever is
greater, at ambient: 23 to 180°C (73 to 356°F)
MIC, MIH
MID
± 0.1 K per K or ± 0.1% per K whichever is
greater, at ambient: 0 to 23°C (32 to 73°F)
± 0.15 K per K or ± 0.15% per K whichever is
greater, at ambient: 0 to 85°C (32 to 185°F)
Box
± 0.1 K per K or ± 0.1% per K whichever is
greater
Thermal Shock (within 20 min.)
LT
± 3.5 K at ΔT ambient = 25 K (45°F)
at target temperature of 50°C (45°F)
Emissivity
All models
0.100 to 1.100
Transmission
All models
0.100 to 1.000
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5
Technical Data
3.3 Electrical Specifications
Power Supply
Voltage
Current
12 to 26 VDC
100 mA
Outputs
1. Output (OUT) 0 to 20 mA, or
4 to 20 mA, or
0 to 5 V, or
Thermocouple (J or K)
2. Output (AMB) 0 to 5 V output for head ambient temperature
(0 to 500°C, 32 to 932°F) or output for alarm
relay (software enabled, only in conjunction
with RS232/485)
mA Output
page 19.
0 to 5 V Outputs min. load impedance 100 kΩ (a lower load
impedance deteriorates the accuracy)
output impedance 100 Ω
short circuit resistant
output impedance 20 Ω
Thermocouple
short circuit resistant
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Technical Data
3.4 Environmental Specifications
Ambient Temperature
MIH sensing head
MIC sensing head
MID sensing head
0 to 180°C (32 to 356°F)
0 to 125°C (32 to 257°F)
0 to 85°C (32 to 185°F)
MID with air cooling ‐18 to 200°C (0 to 392°F)
Electronics box
Storage Temperature
Rating (Head)
0 to 65°C (32 to 150°F)
‐10 to 85°C (14 to 185°F)
IP 65 (NEMA‐4), not for models with an
optical resolution of 2:1
Rating (Box)
Relative Humidity
EMC
IP 65 (NEMA‐4)
10% to 95% non‐condensing
IEC 61326‐1
max. cable length 3 m (118 in.)
Vibration (Head)
Shock (Head)
Weight (Head)
Weight (Box)
IEC 60068‐2‐6: 2 G, 10 to 150 Hz, 3 axes
IEC 60068‐2‐27: 50 G, 11 ms, 3 axes
50 g (2 oz.) with 1 m cable, stainless steel
270 g (10 oz.), die‐cast zinc
Head Cable Material
MID/MIC
PUR (Polyurethane), Halogen free,
Silicone free
Teflon
®
MIH
Teflon develops poisonous gasses when it comes into
contact with flames!
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Basics
4 Basics
4.1 Measurement of Infrared Temperature
All surfaces emit infrared radiation The intensity of this 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. This constant is referred to as the ”emissivity
value”.
Infrared thermometers are optical‐electronic sensors. These sensors
are sensitive to the emitted radiation. 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 signal. The signal processing electronics
analyze the electrical signals and convert it into a temperature
measurement. 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 temperature without touching an object. Consequently,
surface temperatures of moving or hard to reach objects can easily be
measured.
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Basics
4.2 Emissivity of Target Object
To determine the emissivity of the target object refer to section 12.1
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 reflective surfaces and very thin
materials such as plastic films and glass.
This measurement error can be reduced to a minimum if particular
care is taken during installation, and the sensing head is shielded
from these reflecting radiation sources.
4.3 Ambient Temperature
The sensing head was developed for the following ambient
temperature ranges:
•
•
•
MIH: 0 to 180°C (32 to 356°F)
MIC: 0 to 125°C (32 to 257°F)
MID: 0 to 85°C (32 to 185°F)
The MID can operate in ambient temperatures up to 200°C (392°F)
with the air‐cooling accessory.
4.4 Atmospheric Quality
If the lens gets dirty, infrared energy will be blocked and the
instrument will not measure accurately. It is good practice to always
keep the lens clean. The Air Purge Jacket helps keep contaminants
from building up on the lens. If you use air purging, make sure a
filtered air supply with clean dry air at the correct air pressure is
installed before proceeding with the sensor installation.
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MI
Basics
4.5 Electrical Interference
To minimize electrical or electromagnetic interference or “noise” be
aware of the following:
• Mount the unit as far away as possible from potential sources
of electrical interference such as motorized equipment
producing large step load changes.
• Use shielded wire for all input and output connections.
• Make sure the shield wires are earth grounded at one point.
• Sensor head shield braid should make direct contact around
the cable circumference.
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Installation
5 Installation
5.1 Positioning
Sensor location depends on the application. Before deciding on a
location, you need to be aware of the ambient temperature of the
location, the atmospheric quality of the location, and the possible
electromagnetic interference in that location, according to the sections
described above. If you plan to use air purging, you need to have an
air connection available. Wiring and conduit runs must be
considered, including computer wiring and connections, if used.
5.1.1 Distance to Object
The desired spot size on the target will determine the maximum
measurement distance. To avoid erroneous readings the target spot
size must completely fill the entire field of view of the sensor.
Consequently, the sensor must be positioned so the field of view is
the same as or smaller than the desired target size. For a list
The actual spot size for any distance can be calculated by using the
following formula. Divide the distance D by your model’s D:S
number. For example, for a unit with D:S = 10:1, if the sensor is
400 mm (15.7 in.) from the target, divide 400 by 10 (15.7 by 10), which
gives you a target spot size of approximately 40 mm (1.57 in.).
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MI
Installation
best
good
incorrect
Sensor
Target greater than spot size
Target equal to spot size
Target smaller than spot size
Figure 4: Proper Sensor Placement
5.2 Wiring
5.2.1 Sensor Head Cable
The manufacturer preinstall’s the sensor head cable between sensor
head and electronic box. It may be shortened but not lengthened.
Shortening the cable length by 1 m (3 ft.) causes a
temperature error of – 0.1 K / m!
Do not bend the sensor head cable tighter than 25 mm / 1 in.
(MID/MIC) and 15 mm / 0.6 in. (MIH) respectively!
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Installation
5.2.2 Cable for Power Supply and Outputs
You need to connect the power supply (12 to 26 VDC) and the signal
output wires. Use only cable with outside diameter from 4 to 6 mm
(0.16 to 0.24 in), AWG 24.
The cable must include shielded wires. It should not be
used as a strain relief!
1. Cut about 40 mm (1.5 in) of the cable sheath (7) from the end
of the cable. Caution: Do not cut into the shield!
2. Cut the shield (5) so about 5 mm (0.2 in) remains exposed
from under the cable sheath (7). Separate the shield and
spread the strands out. Shorten the inside insulation until
you can separate the wires (6).
3. Strip 3 mm (0.15 in) of insulation from the wires (6).
Figure 5: Cable Preparation
4. Open the electronic box by removing the four Phillips head
screws and pulling off the lid. Unscrew the cap (1), and
remove the plastic compression fitting (2), the rubber washer
(3), which is inside the fitting, and the two metal washers (4).
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MI
Installation
Preinstalled cable
to sensor head
Output signal and
power connector block
Cable that has to be
installed by the user
Figure 6: Connecting of Cables to the Electronic Box
the cap (1), the plastic compression fitting (2), the rubber
washer (3) and one of the metal washers (4).
6. Spread the cable shield (5) and then slip the second metal
washer (4) on the cable. Note that the shield must make good
contact to both metal washers.
7. Slip the wires (6) into the electronic box far enough to
connect to the power and output terminals.
8. Screw the cap (1) into the electronics box. Tighten snuggly.
Do not over tighten.
9. Connect the wires (6) to the power and output terminals on
the printed circuit board.
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Installation
5.3.1 Signal Output
Signal Signal
Ground Output
Power +
Power –
Figure 8: Wiring of the Signal Output (mA or V)
The signal output can be configured either as current or as voltage
output.
The minimum load impedance for the 0 to 5 V output must be
100 kΩ.
The maximum current loop impedance for the 0/4 to 20 mA output
can be 500 Ω, and the power supply and loop impedance must be
matched as shown below.
Max. Loop Impedance
Power
Supply
[V]
Figure 9: Max. Loop Impedance depending on Power Supply
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Installation
5.3.2 Head Ambient Temp. / Alarm Output
This output can be configured either as output for the head ambient
temperature (default configuration) or as an alarm output.
Power +
Power – Ground Head Ambient Temp.
Figure 10: Wiring the Output for Head Ambient Temperature
The output range for the head ambient temperature is 0 to 500°C
(32 to 932°F) with 10 mV /°C.
In case of an alarm the output switches between 0 V and 5 V. The
alarm output is controlled by the target temperature or the sensing
head temperature.
Power + Power -
Figure 11: Wiring of the Alarm Output
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MI
Installation
You may use a solid state relay for the alarm output. The output is
short circuit resistant with 100 Ω output impedance.
The alarm output is only enabled through the DataTemp MultiDrop
software, see the software help for set up instructions.
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Installation
5.3.3 Thermocouple Output
If you are using a J‐ or K‐ thermocouple you must install a
compensation cable. The cable is available as an accessory
(XXXCI1CB25 for Type J, XXXCI2CB25 for Type K) with a cable
length of 7.5 m (24.6 ft.)
Connect the wires according to the following table:
J-Thermocouple
Power Supply
+
–
+
–
white red-white red-yellow yellow
Table 1: Wiring the Thermocouple J Compensation Cable
K-Thermocouple
Power Supply
+
–
+
–
yellow red-yellow red-white white
Table 2: Wiring the Thermocouple K Compensation Cable
Power +
red-yellow
Power – TC J – TC J +
yellow red-white white
Figure 12: Wiring the Thermocouple J Compensation Cable
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MI
Installation
5.4 Inputs FTC
The three inputs FTC1, FTC2, and FTC3 are used for the external
control of the unit.
All input functions are enabled through the DataTemp
MultiDrop software only, see the software help for
complete set up instructions!
FTC1 FTC2 FTC3
Emissivity (analog control)
Emissivity (digital control)
Ambient Background Temperature Compensation
Trigger
x
x
x
x
x
x
x
Hold Function
Table 3: Overview to the FTC Inputs
Figure 13: FTC Inputs on the Electronic Board
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Installation
5.4.1 Emissivity Setting (analog controlled)
The input FTC1 can be configured to accept an analog voltage signal
(0 to 5 VDC) to provide real time emissivity setting. The following
table shows the relationship between input voltage and emissivity.
U in V
0.0
0.1
0.5
0.2
…
…
4.5
1.0
5.0
1.1
Emissivity
Table 4: Ratio between Analog Input Voltage and Emissivity
Example:
The process requires the setting of emissivity:
•
•
for product 1: 0.90
for product 2: 0.40
Following the scheme below, the operator needs only to switch to
position “product 1” or “product 2”.
+ 5 VDC
“product 1”
R1 = 200 Ω
4.0 V (ε=0.9)
To the input FTC1
of the sensor
R2 = 500 Ω
1.5 V (ε=0.4)
“product 2”
R3 = 300 Ω
Figure 14: Adjustment of Emissivity at Input FTC1 (Example)
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MI
Installation
5.4.2 Emissivity Setting (digital controlled)
The sensor’s electronics contains a table with 8 pre‐installed settings
for emissivity. To activate these emissivity settings, you need to have
the inputs FTC1, FTC2, and FTC3 connected. According to the
voltage level on the FTC inputs, one of the table entries will be
activated.
0 = Low signal (0 V)
1 = High signal (5 V)
A non‐wired input is considered as “High”!
Table entry Emissivity FTC3 FTC2 FTC1
(Examples)
0
1
2
3
4
5
6
7
1.100
0.500
0.600
0.700
0.800
0.970
1.000
0.950
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
Figure 15: Digital Selection of Emissivity with FTC Inputs
The values in the table can only be changed by means of the
DataTemp MultiDrop software.
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Installation
5.4.3 Ambient Background Temperature Compensation
The sensor is capable of improving the accuracy of target
temperature measurements by taking into account the ambient or
background temperature. This feature is useful when the target
emissivity is below 1.0 and the background temperature is
significantly hotter than the target temperature. For instance, the
higher temperature of
a
furnace wall could lead to hotter
temperatures being measured especially for low emissivity targets.
Ambient background temperature compensation compensates for the
impact of the reflected radiation in accordance to the reflective
behavior of the target. Due to the surface structure of the target, some
amount of ambient radiation will be reflected and therefore added to
the thermal radiation that is collected by the sensor. The ambient
background temperature compensation compensates the final result
by subtracting the amount of ambient radiation measured from the
sum of thermal radiation the sensor is exposed to.
The ambient background temperature compensation
should always be activated in case of low emissivity
targets measured in hot environments or when heat
sources are near the target!
Three possibilities for ambient background temperature
compensation are available:
• The internal sensor head temperature is utilized for
compensation assuming that the ambient background
temperature is more or less represented by the internal sensor
head temperature. This is the default setting.
• If the background ambient temperature is known and constant,
the user may give the known ambient temperature as a constant
temperature value.
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MI
Installation
• Ambient background temperature compensation from a second
temperature sensor (infrared or contact temperature sensor)
ensures extremely accurate results. For example, the output of
the second unit, set for mV output, could be connected to the
FTC2 analog input (0 to 5 VDC corresponding to low end and
high end of temperature range) is utilized for real time
compensation, whereby both sensors must be set on the same
temperature range.
Sensor 2
targeted
to ambient
Furnace wall
0 – 5 VDC
analog output
at FTC2 input
Sensor 1
targeted
to object
Thermal radiation
of ambient
Thermal radiation
of target
Target object
Figure 16: Principle of Ambient Background Temperature
Compensation
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Installation
5.4.4 Trigger and Hold Function
The FTC3 input can be used as external trigger in conjunction with
the software trigger mode setting “Trigger” or “Hold”.
External switch:
- contact relay,
- transistor,
- TTL gate, …
Figure 17: Wiring of FTC3 as External Input
Trigger: A logical low signal at the input FTC3 will reset the peak or
valley hold function. As long as the input is kept at logical low level
the software will transfer the actual object temperatures toward the
output. At the next logical high level, the hold function will be
restarted.
Temp
object temperature
output temperature
FTC3
Time
Figure 18: FTC3 for Resetting the Peak Hold Function
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MI
Installation
Hold: This mode acts as external generated hold function.
A
transition at the input FTC3 from logical high level toward logical
low level will transfer the current temperature toward the output.
This temperature will be written to the output until a new transition
from high to low occurs at the input FTC3.
Temp
object temperature
output temperature
Trigger
Time
Figure 19: FTC3 for Holding the Output Temperature
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Installation
5.5 Connecting to the PC via RS232
The RS232 interface comes with each model. Connect a single unit
with a RS232 COM port by using the connection kit RAYMISCON.
to the computer’s COM port
Transfer Mode:
• 9600 kBit/s
• 8 data bits
• 1 stop bit
• no parity
• no flow control
2
3
5
Sub-D 9 pin
Figure 20: Connecting the RS232 cable
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MI
Installation
5.6 Installing of Multiple Sensors via RS485
The distance between the sensor and a computer can be up to 1200 m
(4000 ft.) via RS485 interface. This allows ample distance from the
harsh environment where the sensing head is mounted to a control
room or pulpit where the computer is located.
The RS232/485 adapter comes with a power supply:
RAYMINCONV2 for 230 VAC
RAYMINCONV1 for 110 VAC
Connect the signal line as shown:
RS232/485 Adapter
Electronic Box
RxB
RxA
Æ
Æ
B
A
Do not run power supply in the same conduit as the
RxA/RxB wires!
Shunt deactivated!
Figure 21: Wiring the RS485 Interface
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Installation
For an installation of two or more sensors in a RS485 network, each
sensor is wired parallel to the others.
You may connect up to 32 units. Make sure to deactivate the preset
shunt resistor for all units except for the last one. The position of the
switch to deactivate the shunt you can see on the electronic board in
the figure above.
Before units are in a network the multidrop address needs
to be defined. Each sensor must have a unique address!
The following figure illustrates the wiring of sensors in a multidrop
installation.
B
A
RxB
RxA
last unit
with shunt
activated!
B
A
B
A
B
A
unit 1
unit 2
unit
before
last
RS232/485
Adapter
Figure 22: Wiring the RS485 Network
The address setting can be done either through buttons or through
software alternatively.
Addressing through Buttons
Press the <Mode> button until “M” becomes
visible. Use the <Down> and <Up> buttons
until the requested address appears. Press the
<Mode> button to acknowledge your selection.
Addressing through Software
Alternatively the sensor can be controlled by means of the optional
available software DataTemp MultiDrop.
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MI
Installation
Go to the menu <Setup> <Sensor Setup>, and then select the register
<Advanced Setup>. Use <Polling Address> for selecting the requested
address.
Figure 23: Address Setting
Step‐by‐step instructions for addressing RS‐485 MI units:
1. Power the unit.
2. Using either the buttons or software, assign unique address
to the sensor.
3. Power down the unit.
4. Repeat until all sensors have a unique address.
5. On the last unit in the network, activate the shunt resistor
after the unit has been powered down.
Failure to use shielded RS‐485 wire or activation of the
shunt resistor when the unit is powered, can result in
damage to the electronics!
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Operation
6 Operation
Once you have the sensor positioned and connected properly, the
system is ready for continuous operation.
The operation of the sensor can be done by means of the built‐in
control panel on the sensor’s electronic board or by means of the
software that came with your sensor optionally.
6.1 Control Panel
The sensor is equipped with a control panel in the sensor’s electronic
housing, which has setting/controlling buttons and an LCD display.
The actual function mode is shown on the display with a specific
mode symbol.
Output Jumper
Mode Symbol
Value
Mode Button
Value Buttons
Figure 24: Control Panel
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MI
Operation
6.2 Setting the Output Jumper
In addition to the set mode in the
outputs must be configured by
switching the <Output> jumper
in accordance to the requested
output function (mA, mV, TC).
E.g. for the “4 to 20 mA” output,
the <Output> jumper must be set
to the bottom position labeled
with “mA”.
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Operation
6.3 Setting of Modes
You can easily determine the unit’s mode or parameter by doing the
following:
Press the <Mode> button until the
symbol for the actual set mode appears
in the display, e.g. <T> for setting the
transmission, see Table 5: Available
Use the <Down/Up> buttons until the
requested value comes into view.
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MI
Operation
Display Mode
Range
C
Target Temperature* (effected
not adjustable
by signal processing)
A
T
Head Ambient Temperature
not adjustable
not adjustable
Target Temperature (not
effected by signal processing)
Output Mode
mV
mV output (default)
TCK
TCJ
thermocouple type K output
thermocouple type J output
4 - 20 mA current loop
4 - 20
0 - 20
0 - 20 mA current loop
E
T
Emissivity
0.100 ... 1.000 (default: 0.950)
0.100 ... 1.000 (default: 1.000)
0.100 ... 999.0
Transmission
A
P
V
L
Signal processing: Average**
Signal processing: Peak Hold**
Signal processing: Valley Hold**
Low end of range
0.100 ... 998.9 999 = infinite (P ∞)
0.100 ... 998.9 999 = infinite (V ∞)
L = -40 ... 600**** (default: 0)
H = -40 ... 600**** (default: 500)
°C or °F (default: °C)
H
U
M
High end of range
Temperature Unit
Multidrop Address***
1 – 32, --- for address 0 (single unit)
*
**
appears automatically after 10 s without any action
not simultaneously
*** only for units with RS485 interface
**** temperatures according to LT head
Table 5: Available Modes
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Operation
6.4 Post Processing
6.4.1 Averaging
Averaging is used to smooth the output signal. The signal is
smoothed depending on the defined time basis, whereby the output
signal tracks the detector signal with significant time delay but noise
and short peaks are damped. Use a longer average time for more
accurate damping behavior. The average time is the amount of time
the output signal needs to reach 90% magnitude of an object
temperature jump.
Temp
output temperature
object temperature
temperature jump
90% of
temperature
jump
average time
Time
Figure 25: Averaging
A low level input (GND) at external input FTC3 will promptly
interrupt the averaging and will start the calculation again.
Attention: The disadvantage of averaging is the time delay of the
output signal. In case of having a temperature jump at the input (hot
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MI
Operation
object), the output signal reaches only 90% magnitude of the actual
object temperature after the defined average time.
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Operation
6.4.2 Peak Hold
The output signal follows the object temperature until a maximum is
found. Once the hold time is exceeded the output signal, tracks and
output the actual object temperature and the algorithm will start over
again. The range for the hold time is 0.1 to 998.9 s.
Temp
output temperature
object temperature
hold time
hold time
Time
Figure 26: Peak Hold
A defined hold time of 999 s (symbol “∞” in the display) will put the
device into continuous peak detection mode.
A low level input (GND) at external input FTC3 will promptly
interrupt the hold time and will start the maximum detection again.
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MI
Operation
6.4.3 Valley Hold
The output signal follows the object temperature until a minimum is
found. Once the hold time is exceeded the output signal, tracks and
output the actual object temperature and the algorithm will start over
again. The range for the hold time is 0.1 to 998.9 s.
Temp
output temperature
object temperature
hold time
hold time
Time
Figure 27: Valley Hold
A defined hold time of 999 s (symbol “∞” in the display) will put the
device into continuous valley detection mode.
A low level input (GND) at external input FTC3 will promptly
interrupt the hold time and will start the minimum detection again.
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Operation
6.4.4 Advanced Peak Hold
This function searches the sensor signal for a local maximum (peak)
and writes this value to the output until a new local maximum is
found. Before the algorithm restarts searching for a local maximum,
the object temperature has to drop below a predefined threshold. If
the object temperature raises above the held value which has been
written to the output so far, the output signal follows the object
temperature again. If the algorithm detects a local maximum while
the object temperature is currently below the predefined threshold
the output signal jumps to the new maximum temperature of this
local maximum. Once the actual temperature has passed a maximum
above a certain magnitude, a new local maximum is found. This
magnitude is called hysteresis.
Temp
output temperature
object temperature
hysteresis
Time
Figure 28: Advanced Peak Hold
The advanced peak hold function is only adjustable by means of the
DataTemp MultiDrop Software.
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MI
Operation
6.4.5 Advanced Valley Hold
This function works similar to the advanced peak hold function,
except it will search the signal for a local minimum.
6.4.6 Advanced Peak Hold with Averaging
The output signal delivered by the advanced peak hold functions
tends to jump up and down. This is due to the fact, that only
maximum points of the otherwise homogenous trace will be shown.
The user may combine the functionality of the peak hold function
with the averaging function by choosing an average time, thus,
smoothing the output signal for convenient tracing.
output temperature
Temp
without averaging
object temperature
Time
Figure 29: Advanced Peak Hold with Averaging
The advanced peak hold function with averaging is only adjustable
by means of the DataTemp MultiDrop Software.
6.4.7 Advanced Valley Hold with Averaging
This function works similar to the advanced peak hold function with
averaging, except it will search the signal for a local minimum.
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Options
7 Options
Options are items that are factory installed and must be specified at
time of order. The following are available:
•
•
•
Longer cable lengths: 3 m / 9.8 ft. (…CB3), 8 m / 26.2 ft. (…CB8),
15 m / 49.2 ft. (…CB15)
RS485 serial interface (…4), for multidrop networks or long
distances
Box lid with view port (…V)
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Accessories
8 Accessories
8.1 Overview
A full range of accessories for various applications and industrial
environments are available. Accessories include items that may be
ordered at any time and added on‐site:
•
•
•
•
Adjustable Mounting Bracket (XXXMIACAB)
Fixed Mounting Bracket (XXXMIACFB)
Air Purging Jacket (XXXMIACAJ)
Air Cooling System with 0.8
m
(2.6 ft.) air hose
(XXXMIACCJ) or with 2.8 m (9.2 ft.) air hose (XXXMIACCJ1)
Right Angle Mirror (XXXMIACRAJ, XXXMIACRAJ1)
Box Lid (XXXMIACV)
Protective Window (XXXMIACPW)
Protective Window, transmission already set in the unit
(XXXMIACPWI)
•
•
•
•
•
•
PC connection kit for models with RS232, including
DataTemp MultiDrop Software (RAYMISCON)
PC connection kit for models with RS485, including
DataTemp MultiDrop Software and RS232/485 converter:
110 VAC (RAYMINCONV1)
230 VAC (RAYMINCONV2)
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MI
Accessories
Adjustable Bracket
Electronic Box
Sensing Head
Fixed Bracket
Figure 30: Standard Mounting Accessories
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Accessories
8.4 Air Purging Jacket
The air purge jacket is used to keep dust, moisture, airborne particles,
and vapors away from the sensing head. Clean, oil free air is
recommended. The air purge jacket withstands ambient temperatures
up to 180°C (356°F) and should not be used for cooling purposes. The
recommended air flow rate is 30 to 60 l / min (0.5 to 1 cfm). The max.
pressure is 5 bar.
Hose with inner
diameter of 3 mm
(0.12 in), outside
5 mm (0.2 in)
Figure 33: Air Purging Jacket (XXXMIACAJ)
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MI
Accessories
Figure 34: Mounting the Air Purge Jacket
1. Remove the sensor (1) and cable from the electronic box by
disconnecting the wires from the electronic box.
2. Open the Air Purging Jacket (3, 4) and screw the white plastic
fitting (2) onto the sensor up to the end of the threads, do not
over tighten!
3. Slip the cable (6) through the backside (4) of the jacket.
4. Close the Air Purging Jacket (3, 4) and reconnect the wires to
the electronic box and apply the mounting nut (5).
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Accessories
8.5 Air Cooling System
The sensing head can operate in ambient temperatures up to 200°C
(392°F) with the air‐cooling system. The air‐cooling system comes
with a T‐adapter including 0.8 m / 31.5 in (optional: 2.8 m / 110 in) air
hose and insulation. The T‐adapter allows the air‐cooling hose to be
installed without interrupting the connections to the box.
The air‐cooling jacket may be combined with the right angle mirror.
max. ambient 200°C (392°F)
Sensing Head
max. ambient 50°C (122°F)
T-
Air Hose
Cable
Adapter
Electronic
Housing
Air cooling (max. 35°C / 95°F)
Figure 35: Air Cooling System
T-Adapter
Hose to
sensing head
Cable to electronic
housing
Fitting free for air connection
Hose:
inner Ø: 9 mm (0.35 in)
outer Ø: 12 mm (0.47 in)
Figure 36: Connecting the T‐Adapter (XXXMIACCJ)
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MI
Accessories
Air Flow:
60 l / min (2.1 cubic feet per minute)
50 l / min (1.8 cfm)
40 l / min (1.4 cfm)
Hose Length
Figure 37: Maximum Ambient Temperature depending on
Air Flow and Hose Length
Note: “Hose Length“ is the length of hose exposed to high ambient
temperature (not the overall length of the hose).
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Accessories
Figure 38: Air Cooling System: Purging Jacket
The Air Cooling System consists of:
(1)
(2)
(3)
(4)
(5)
(6)
sensing head
inner plastic fitting (air purging jacket)
front part of the air‐purging jacket
back part of the air‐purging jacket
mounting nut
preinstalled cable between sensor and box, leading through the
T‐adapter
(7)
(8)
(9)
hose connecting nut
inner hose
outer hose
(10) T‐adapter
(11) rubber washer
(12) plastic compression fitting
(13) cap
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MI
Accessories
Figure 39: Air Cooling System: T‐Adapter
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Accessories
Hose:
inner Ø: 9 mm (0.35 in)
outer Ø: 12 mm (0.47 in)
Figure 40: Dimensions of Air Cooling System
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MI
Accessories
8.6 Right Angle Mirror
The right angle mirror comes in two different versions:
XXXMIACRAJ
right angle mirror as accessory for air purging
jacket or air cooling system
XXXMIACRAJ1
right angle mirror with integrated air purging
Figure 41: Right Angle Mirror XXXMIACRAJ (left),
Right Angle Mirror with Air Purging XXXMIACRAJ1 (right)
The right angle mirror withstands ambient temperatures up to 180°C
(356°F).
For mounting the right angle mirror (XXXMIACRAJ) see section 8.4
part of the air purging jacket (3), mount the right angle mirror.
Figure 42: Right Angle Mirror (* with Air Purging)
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Accessories
8.8 Protective Window
The protective window can be used to protect the sensing head from
dust and other contamination. This should be applied especially for
sensors without
resolution of 2:1.
a
lens. These are all models with an optical
The protective window is made from non‐poisonous zinc sulfide,
with a transmission factor of 0.75 ± 0.05. It has an outer diameter of
17 mm (0.67 in). The protective window can be directly screwed to
the sensing head. It withstands ambient temperatures up to 180°C
(356°F).
For correct temperature readings, the transmission of the
protective window must be set via the control panel in the
Figure 44: Protective Window (XXXMIACPW)
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Maintenance
9 Maintenance
Our sales representatives and customer service are always at your
disposal for questions regarding application assistance, calibration,
repair, and solutions to specific problems. Please contact your local
sales representative if you need assistance. In many cases, problems
can be solved over the telephone. If you need to return equipment for
servicing, calibration, or repair, please contact our Service
Department before shipping. Phone numbers are listed at the
beginning of this document.
9.1 Troubleshooting Minor Problems
Symptom
Probable Cause
Solution
No output
No power to instrument
Check the power supply
Erroneous
temperature
Faulty sensor cable
Field of view obstruction
Window lens
Verify cable continuity
Remove the obstruction
Clean the lens
Erroneous
temperature
Erroneous
temperature
Erroneous
temperature
Wrong emissivity
Correct the setting
Temperature
fluctuates
Correct Peak/Valley Hold or Average
settings
Wrong signal processing
No ground for the head
Temperature
fluctuates
Check wiring / grounding
Table 6: Troubleshooting
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MI
Maintenance
9.2 Fail‐Safe Operation
The Fail‐Safe system is designed to alert the operator and provide a
safe output in case of any system failure. The sensor is designed to
shutdown the process in the event of a set‐up error, system error, or a
failure in the sensor electronics.
The Fail‐Safe circuit should never be relied on
exclusively to protect critical processes. Other safety
devices should also be used to supplement this function!
When an error or failure does occur, the display indicates the
possible failure area, and the output circuits automatically adjust to
their preset levels, see the following tables.
Error Codes for the Outputs
Symptom
mV
0 to 20 mA 4 to 20 mA
TC-K
TC-J
Temperature over
range
5 V
21 mA
21 mA
2.5 mA
21 mA
-
-
Temperature under
range
0 V
0 mA
-
-
Defect of the internal 5 V
head ambient
21 mA
> 1200°C > 1200°C
(2192 °F) (2192 °F)
temperature probe
Table 7: Error Codes (Outputs)
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Maintenance
Error Codes via RS232/485
Output
T------
T>>>>>>
T<<<<<<
Error Code Description
Invalid temperature reading
Temperature over range
Temperature under range
Table 8: Error Codes (via RS232/485)
Error Codes for the LCD Display
Display
----C
Error Code Description
Invalid temperature reading
Wrong sensing head
Wrong parameter setting (box)
Temperature over range
Temperature under range
Firmware revision number, after reset of
the unit (2 seconds)
H-ERR
B-ERR
OVER
UNDER
2.15
Table 9: Error Codes (LCD Display)
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MI
Maintenance
9.3 Sensing Head Exchange
Sensing heads and electronic boxes can only be
interchanged in accordance to the following table!
MID02 MIC02 MID10 MIC10 MIH10 MID20 MIC20 MIH20
MID02
MIC02
MID10
MIC10
MIH10
MID20
MIC20
MIH20
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
The head exchange requires to type in the new sensing head
calibration data printed on the cable as follows:
1. To exchange the sensing head, disconnect the power of the
unit.
2. Connect the wires for the new sensing head according to the
color description on the printed circuit board.
3. Switch the power for the unit to ON.
4. Press simultaneously the <Mode/Down/Up> buttons.
5. Four characters appear in the display (former values). Type in
the new designator (A) using the <Down/Up> buttons. Press
the <Mode> button.
6. The second block of four characters appears in the display
(former values). Type in the new designator (B) using the
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Maintenance
<Down/Up> buttons. Activate your settings by pressing the
<Mode> button.
B
A
Figure 45: Sensing Head Calibration Data printed on the Cable
(e.g. Head with two blocks of 4 numbers)
For MIH models and specially modified models (like G5 or MTB),
four blocks of four characters are used.
Alternatively you also can use the DataTemp MultiDrop software for
typing in the new sensing head calibration data.
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MI
Software
10 Software
For use with RS232 or RS485 models, DataTemp MultiDrop software
allows access to the extended digital features of the MID with an
easy‐to‐use interface. Compatible with WIN 95/98/NT/2000/XP,
DataTemp MultiDrop provides for sensor setup, remote monitoring,
and simple data logging for analysis or to meet quality record‐
keeping requirements.
Additional features configurable with optional RS232 or optional
RS485 communications and DataTemp MultiDrop Software:
•
5V alarm signal triggered by target temperature or ambient
head temperature
•
Eight‐position “recipe” table that can be easily interfaced to an
external control system
•
•
External reset signal input for signal processing
External inputs for analog emissivity adjustment or
background radiation compensation
•
Remote digital communication and control of up to 32 sensors
in an RS485 multidrop configuration
For more detailed information, see the comprehensive software help
of the DataTemp MultiDrop.
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Programming Guide
11 Programming Guide
This section explains the sensor’s communication protocol.
A
protocol is the set of commands that define all possible
communications with the sensor. The commands are described along
with their associated ASCII command characters and related message
format information. Use them when writing custom programs for
your applications or when communicating with your sensor with a
terminal program.
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MI
Programming Guide
11.1 Transfer Modes
The unit’s serial interface is either RS232 or RS485, depending on the
model.
Settings:
transfer rate: 9.6 kBaud, 8 data bits, 1 stop bit, no
parity, flow control: none (half duplex mode).
There are two possible transfer modes for the serial interface:
Poll Mode: By user interface control, a parameter will be set or
requested.
Burst Mode: A pre‐defined data string (“burst string“) will be
transferred as fast as possible as long as the burst mode
is activated. The data will be transferred in one
direction only, from the unit to the user interface.
V=P
V=B
“P“ starts the Poll mode (allows to request or to set
parameters)
“B“ starts the Burst mode (data will be transferred as
fast as possible; necessary: data string definition –
“Burst string“)
$=UTIE
“$“ sets the parameter combination (“burst string“)
“U“ unit (°C or °F)
“T“ temperature value
“I“ internal temperature of the sensing head
“E“ emissivity
?X$
gives the burst string parameters while in poll mode
Return from the burst mode to the poll mode:
If the poll mode shall be activated while the burst mode is still active,
send a character and within the following 3 seconds the command
V=P.
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Programming Guide
11.2 General Command Structure
Requesting a parameter (Poll Mode)
?ECR
“?“ is the command for “Request“
“E“ is the parameter requested
“CR“ (carriage return, 0Dh) is closing the request.
Remark: It is possible to close with “CR“ “LF“, 0Dh,
0Ah, but not necessary.
Setting a parameter (Poll Mode)
The parameter will be stored into the device EEPROM.
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
Remark: It is possible to close with “CR“ “LF“, 0Dh,
0Ah, but not necessary.
Setting a parameter without writing into the EEPROM (Poll Mode)
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
into the EEPROM“
“0.975“ is the value for the parameter
“CR“ (carriage return, 0Dh) is closing the request.
Remark: It is possible to close with “CR“ “LF“, 0Dh,
0Ah, but not necessary.
Device response format:
!E0.975CRLF “!“ is the parameter for “Answer“
“E“ is the parameter
“0.975“ is the value for the parameter
“CR“ „LF“ (0Dh 0Ah) is closing the answer.
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Programming Guide
After switching the power to “ON“, the device is sending a
notification:
#XICRLF
“#“ is the parameter for “Notification“
“XI“ is the value for the notification (here “XI“; unit
switches to “ON”)
“CR“ “LF“ (0Dh 0Ah) is closing the answer.
Error message
*Syntax Error “*“ is the character for “Error“
11.3 Device Information
This information is factory installed, read only.
Command Description
Answer
(Example)
“XUMILT“
“!DSRAY“
“!XV0A0027“
“!XR2.08“
?XU
?DS
?XV
?XR
?XH
?XB
Device name
Remark (e.g., for specials)
Serial Number
Firmware Revision Number
Maximum Temp. Range: e.g. for LT head “!XH0600.0“
Minimum Temp. Range: e.g. for LT head “!XB-040.0“
Table 1: Device Information
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Programming Guide
11.4 Device Setup
11.4.1 Temperature Calculation
U=C
unit for the temperature value
E=0.950
Emissivity setting (Caution: according to the settings
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), and a
gain value.
DG=1.0000 Gain adjustment for the temperature signal
DO=0
Offset adjustment for the temperature signal
In case the ambient temperature is not requested by the internal head
temperature, you must set the ambient temperature values as
follows:
A=250.0
AC=1
Ambient temperature (example)
Control ambient background temp. compensation
11.4.2 Emissivity Setting and Alarm Set points
The device allows three choices for the emissivity setting and two for
the alarm output setting.
ES
Selection of the emissivity setting.
ES=1
Emissivity set by a constant number according to the
„E“ command
ES=E
ES=D
Emissivity set by a voltage on FTC1 (analog input)
Emissivity set by the entries in a table (selected by
digital inputs FTC1 – FTC 3)
?CE
asks for the emissivity value that is actually used for
temperature calculation
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MI
Programming Guide
There are eight entries possible for emissivity setting (1) and a related
set point (threshold) (2). To be able to write or read these values, use
the following commands:
EP=2
RV=0.600
SV=220.0
set pointer for table entry, e.g. to line 2 (3)
set the emissivity value for line 2 to 0.600 (4)
set the set point (threshold) for line 2 to 220.0 (5)
1
2
3
4
5
Figure 46: Table for Emissivity and Set Points
To activate these emissivity settings, you need to have the 3 external
inputs (FTC) connected. According to the digital combination on the
FTC wires, one of the table entries will be activated, see section 5.4.2
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Programming Guide
11.4.3 Post Processing
The following parameters can be set to determine the post processing
P=5
peak hold, hold time: 5 s
F=12.5
G=10
XY=3
XY=‐2
valley hold, hold time: 12.5 s
averaging, average time (90%): 10 s
advanced peak hold, hysteresis: 3 K
advanced valley hold, hysteresis: 2 K
Advanced Peak/Valley Hold with Averaging:
threshold: 250°C
averaging time (90%): 15 s
C=250
AA=15
11.5 Dynamic Data
All temperature related information is calculated 128 times a second.
To request the dynamic data, following commands are available:
?T
target temperature
?I
internal temperature of the sensing head
internal temperature of electronics housing
energy value of the infra‐red temperature
trigger set point (active/inactive) for the FTC3 input
?XJ
?Q
?XT
To check for resets (e.g. power shut down) use the command XI.
Notice, after a reset the unit is new initialized.
?XI
!XI0
!XI1
XI=0
asks for the reset status
no reset occurred
a reset occurred, new initialization of the unit
sets the reset status back to 0
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Programming Guide
11.6 Device Control
11.6.1 Output for the Target Temperature
The signal output can be set to 4 – 20 mA, 0 – 20 mA or mV. If current
output is activated, the output can provide a predefined current:
XO=4
output mode to 4 – 20 mA
O=13.57
O=60
output of a constant current at 13.57 mA
switches back to the temperature controlled output
11.6.2 Analog Output, Scaling
According to the temperature range of the model, it is possible to set
a maximum voltage/current value according to a temperature value
(e.g., the maximum current 20 mA shall represent 200°C / 392°F). The
same setting is possible for the minimum value.
H=500
L=0
the maximum current/voltage value is set to 500°C
the minimum current/voltage value is set to 0°C
Remark: You cannot set this value for thermocouple output. The
minimum span between the maximum / minimum settings is 20 K.
11.6.3 Alarm Output
The second output channel can be set in different modes, see section
• Internal sensing head temperature
• Alarm output
K=7
K=4
internal sensing head temperature
alarm output for object temperature, 0 V in case of no
alarm
XS=125.3 threshold setting to 125.3°C (if U=C is set)
11.6.4 Factory default values
It is possible to reset the unit to the default values.
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Programming Guide
XF
factory default values will be set
11.6.5 Lock Mode
The access to the unit is possible via serial interface (software) and
via the direct user input (mode buttons, LCD display). It is possible
to lock the buttons. This allows access the unit only via software.
J=L
direct user input via mode buttons denied
Alternatively the unit can be unlocked by pressing the <Mode/Up>
buttons simultaneously for three seconds.
11.6.6 Mode Setting for the Digital Input FTC3
on page 28) can be used as follows:
XN=T
XN=H
FTC3 as trigger
FTC3 with hold function
11.6.7 Changing the Sensing Head Calibration Data
If it is necessary to exchange the sensing head, you must set the
calibration data for the new sensing head:
XZ=0123 4567 FFFF FFFF
according to the head calibration data
For MID/MIC‐models the last eight numbers are not used and must
be set to „F“ like shown in the example above. For MIH‐models and
specials (like MTB or G5) all sixteen numbers are used.
11.6.8 Ambient Background Temperature Compensation
In case of compensating the ambient background temperature, the
following modes are available:
AC=0
AC=1
no compensation
compensation with a constant temperature value set
with command A.
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Programming Guide
AC=2
compensation with an external voltage signal at the
analog input FTC2 (0 V – 5V corresponds to low end
and high end of temperature range), current ambient
temperature is readable with command A.
Note: The mode AC = 2 does not function in case of
setting the command ES = D!
For more information regarding the ambient background
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Programming Guide
11.7 Multiple Units (RS485 Multidrop Mode)
Up to 32 units can be connected within a RS485 network, see section
command to one unit among the 32 possible, it is necessary to
„address“ a command. Therefore, a 3‐digit number is set prior the
command. The 3‐digit number is determined between 001 and 032.
Exception: Broadcast command.
If a command is transferred, starting with the 3‐digit number 000, all
units (with addresses from 001 to 032) connected will get this
command – without to send an answer.
Note: A unit with the address 000 is a single unit and not in
multidrop mode.
XA=024 will set address to 24 (unit must not be in multidrop mode)
Changing an address:
(e.g. the address is change from 24 to 17)
command
„017?E“
answer
„017E0.950“
„017XA=024“
„024?E“
“017XA024” setting of a new address
„024E0.950“
Example for the broadcast command:
command
“024?E”
answer
“024E0.950”
“000E=0.5”
“024?E”
will be executed from all units, no answer
“024E0.500”
“012?E”
“012E0.500”
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Programming Guide
11.8 Command Set
Description
Char Format
P
B
S
Legal values
Factory LCD
default
Poll parameter
Set parameter
Set parameter without
EEPROM storage
Multidrop addressing
?
=
#
?X/?XX
X/XX=...
X/XX#
*
?T
E=0.85
E#0.85
*
*
001?E
*
*
answer:
001!E0.95
*Syntax error
!P010
(3)
(1)
Error message
*
!
$
A
Acknowledge message
Burst string format
Ambient background
temp. compensation
Advanced hold with
average
Control ambient
background temp.
compensation
*
*
*
*
UTEI
(6)
nnn.n
*
AA nnn.n
*
*
*
*
000.0 – 999 s
000.0 s
0
AC
n
0 = head temp.,
1 = via number,
2 = via external
input
Advanced hold threshold
C
nnn.n
*
*
*
*
in current
scale(C / F)
300
Currently calculated
emissivity
Current calculation
setpoint / relay function
CE n.nnn
CS nnn.n
In current scale
(C / F)
Device adjustment gain DG n.nnnn
Device adjustment offset DO nnn
*
*
*
*
*
*
*
0.8000 1.2000 1.0000
-200 +200
z.B. !DSRAY
0.100 – 1.100
Hex value of
ErrCode
0
Device special
Emissivity internal (10)
Error Code
DS XXX
n.nnn
EC nnnn
E
*
*
*
0.950
E
Presel. emissivity pointer EP
(10)
n
*
0 – 7
7
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Programming Guide
Description
Char Format
ES
P
B
S
Legal values
Factory LCD
default
I
Source: emissivity /
X
*
*
I=constant
setpoint for alarm output
number
(E=0.950)
E=external
analogous input
FTC1
D= E/XS digital
selected FTC1-3
0.100 - 1.100
0.000 - 998.9 s 000.0 s
(999 = infinite)
Presel. emissivity value
Valley hold time(4)
EV n.nnn
*
*
*
*
F
nnn.n
*
V
Average time
Top of mA/mV range
Sensor / head ambient
G
H
I
nnn.n
nnn.n
nnn.n
*
*
*
*
*
*
*
*
000.0 – 999 s
(1)
in current scale
(°C/°F)
000.0 s
(7)
A
H
Switch panel lock
J
X
N
*
*
*
*
L=locked
U=unlocked
0=off
unlocked
?
Alarm output control
K
1=on
2=Target.; norm.
open
3=norm. closed
4=Head; normal
open
5=norm. closed
7=sensor / head
ambient
Bottom of mA/mV range
Output voltage
L
O
nnn.n
n.nnn
*
*
*
*
*
(1)
(8)
6
L
L
P
0.000 – 5.000
voltage in V
6=controlled by
unit
0.00 – 20.00
current in mA
21=over range
60=controlled by
unit
Output current
O
nn.nn
*
*
*
60
Peak hold time (4)
Power/AD value
P
nnn.n
nnnn
*
*
*
*
000.0 998.9 s
(999 = infinite)
000.0 s
Q
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Programming Guide
Description
Char Format
P
B
S
Legal values
Factory LCD
default
Presel. setpoint / relay
function
SV nnn.n
(1)
Target temperature
T
nnn.n
*
*
*
in current scale
(°C / °F)
C / F
Temperature unit
Poll / Burst mode
U
V
X
X
*
*
*
*
C
U
P = poll
Poll mode
B = burst
Burst string contents
Multidrop address
X$
XA nnn
*
*
*
000 – 032
unchanged
000 = single unit (preset: 0)
Bottom temperature of
range
XB nnn.n
*
Restore factory defaults XF
*
*
Transmission
High temperature of
range
XG n.nnn
XH nnn.n
*
*
*
0.100 - 1.000
1.000
T
Sensor initialization
XI
n
*
*
*
*
*
*
*
1 after Reset,
0 if XI = 0
in current
scale(°C / °F)
T = trigger
H = hold
0 = 0 – 20 mA
4 = 4 – 20 mA
5 = TCJ
Box temperature
XJ nnn.n
FTC 3 trigger / hold
Analog output mode
XN
XO
X
n
*
*
T
9
6 = TCK
9 = mV
Firmware revision
Setpoint / relay function XS nnn.n
(10)
XR
*
*
e.g. 1.01
(1)
*
250°C
0
Trigger
XT
n
*
*
0 = inactive
1 = active
Unit identification
Serial number
Advance hold hysterese XY nnn.n
(4)
XU
XV
*
*
*
e.g. !XUMILT4
e.g. 98123
*
*
Head calibration (9)
XZ
*
(1) LT: ‐40 to 600°C (‐40 to 1112°F)
(2) n = number, X = uppercase letter
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Programming Guide
(3) $ = UTQE
(4) setting average / peak / valley / advanced hold cancels all other hold modes
(6) LT: 23°C (73°F)
(7) LT: 500°C (932°F)
(8) LT: 0°C (32°F)
(9) XZ = 0123 4567 89AB CDEF set command checks format! Firmware restart by unit
(10) E0=1.100, E1=0.500, E2=0.600, E3=0.700, E4=0.800, E5=0.970, E6=1.000, E7=0.950
XS0=200, XS1=210, XS2=220, XS3=230, XS4=240, XS5=250, XS6=260, XS7=270
En / XSn set via command EP = n (n = 0 … 7)
Table 2: Command Set
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Appendix
12 Appendix
12.1 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 contact
temperature method. Next, measure the object’s temperature
and adjust emissivity setting until the correct temperature
value is reached. This is the correct emissivity for the measured
material.
2. For relatively low temperatures (up to 260°C / 500°F) place a
plastic sticker (e.g. XXXRPMACED) 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 correct
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 is 0.95. Next, measure the
temperature of the painted area using an emissivity setting of
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Appendix
0.95. Finally, measure the temperature of an adjacent area on
the object and adjust the emissivity until the same temperature
is reached. This is the correct emissivity for the measured
material.
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82
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Appendix
12.2 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. Transmission (e.g. thin films plastics)
To optimize surface temperature measurements, consider the
following guidelines:
•
•
•
•
Determine the object emissivity using the instrument which is
also to 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.
•
Mount instrument perpendicular to surface if possible. In all
cases, do not exceed angles more than 30° from incidence.
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Appendix
METALS
Material
Emissivity
5 µm
3.9 µm
8 – 14 µm
Aluminum
Unoxidized
Oxidized
Alloy A3003, Oxidized 0.4
0.02-0.2
0.2-0.4
0.02-0.2
0.2-0.4
0.4
0.02-0.1
0.2-0.4
0.3
Roughened
Polished
0.1-0.4
0.02-0.1
0.1-0.4
0.02-0.1
0.1-0.3
0.02-0.1
Brass
Polished
Burnished
Oxidized
0.01-0.05
0.3
0.5
0.01-0.05
0.3
0.5
0.01-0.05
0.3
0.5
Chromium
Copper
Polished
0.03-0.3
0.03-0.3
0.02-0.2
0.03
0.03
0.03
Roughened
Oxidized
0.05-0.15
0.5-0.8
0.01-0.1
0.05-0.15
0.5-0.8
0.01-0.1
0.05-0.1
0.4-0.8
0.01-0.1
Gold
Haynes
Alloy
Inconel
Oxidized
0.3-0.8
0.3-0.8
0.3-0.8
0.6-0.9
0.3-0.6
0.15
0.6-0.9
0.3-0.6
0.15
0.7-0.95
0.3-0.6
0.15
Sandblasted
Electropolished
Iron
Oxidized
Unoxidized
Rusted
0.6-0.9
0.05-0.25
0.5-0.8
—
0.6-0.9
0.05-0.25
0.5-0.8
—
0.5-0.9
0.05-0.2
0.5-0.7
—
Molten
Iron, Cast
Oxidized
0.65-0.95
0.25
0.2-0.3
0.65-0.95
0.25
0.2-0.3
0.6-0.95
0.2
0.2-0.3
Unoxidized
Molten
Iron, Wrought
Dull
0.9
0.9
0.9
Lead
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Appendix
Polished
Rough
0.05-0.2
0.4
0.05-0.2
0.4
0.05-0.1
0.4
Oxidized
Magnesium
Mercury
0.2-0.7
0.03-0.15
0.05-0.15
0.2-0.7
0.03-0.15
0.05-0.15
0.2-0.6
0.02-0.1
0.05-0.15
Molybdenum
Oxidized
Unoxidized
Monel (Ni-Cu)
Nickel
0.3-0.7
0.1-0.15
0.1-0.5
0.3-0.7
0.1-0.15
0.1-0.5
0.2-0.6
0.1
0.1-0.14
Oxidized
Electrolytic
Platinum
Black
0.3-0.6
0.1-0.15
0.3-0.6
0.1-0.15
0.2-0.5
0.05-0.15
0.9
0.9
0.9
Silver
0.02
0.02
0.02
Steel
Cold-Rolled
Ground Sheet
Polished Sheet
Molten
0.8-0.9
0.5-0.7
0.1
0.1-0.2
0.7-0.9
0.15-0.8
0.05
0.8-0.9
0.5-0.7
0.1
0.1-0.2
0.7-0.9
0.15-0.8
0.05
0.7-0.9
0.4-0.6
0.1
—
Oxidized
Stainless
Tin (Unoxidized)
Titanium
0.7-0.9
0.1-0.8
0.05
Polished
Oxidized
Tungsten
Polished
Zinc
0.1-0.3
0.5-0.7
0.05-0.5
0.05-0.25
0.1-0.3
0.5-0.7
0.05-0.5
0.05-0.25
0.05-0.2
0.5-0.6
0.03
0.03-0.1
Oxidized
Polished
0.1
0.03
0.1
0.03
0.1
0.02
Tab. 10: Typical Emissivity Values for Metals
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Appendix
NON-METALS
Material
Emissivity
5 µm
3.9 µm
8 – 14 µm
Asbestos
Asphalt
Basalt
0.9
0.95
0.7
0.95
0.95
0.7
Carbon
Unoxidized
Graphite
Carborundum
0.8-0.9
0.7-0.9
0.9
0.8-0.9
0.7-0.8
0.9
Ceramic
Clay
Concrete
0.8-0.95
0.85-0.95
0.9
0.95
0.95
0.95
Cloth
0.95
0.95
Glass
Plate
“Gob”
0.98
0.9
0.85
—
Gravel
Gypsum
Ice
0.95
0.4-0.97
—
0.95
0.8-0.95
0.98
Limestone
0.4-0.98
—
0.95
0.98
0.9-0.95
0.95
Paint (non-al.)
Paper (any color)
Plastic, greater than
500 µm (0.02 in) thickness
Rubber
0.95
0.95
0.9
0.95
Sand
0.9
0.9
Snow
—
0.9
Soil
Water
—
—
0.9-0.98
0.93
Wood, Natural
0.9-0.95
0.9-0.95
Tab. 11: Typical Emissivity Values for Non‐Metals
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86
MI
Index
Index
Accessories
46
Accuracy
4
Air pressure
12
Air Purge
46
Air Purge Jacket
Ambient Temperature
Average
12
12
60
Control Panel
Emissivity
34, 59
5, 11, 12, 60, 80, 82, 84, 85
Loop impedance
Maintenance
Mirror
Network
Noise
19
60
57, 80
32
13
6
Optical Resolution
Power Supply
Repeatability
Response Time
Sensing Head Exchange
Spectral Response
Spot Size
Temperature Coefficient
Temperature Resolution
Thermal Shock
Transmission
Transmission
Troubleshooting
Valley Hold
60
4
4
63
4
14
5
5
5
5
82
60
60
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