Operating Instructions
for
Integrated Temperature Transmitter
Model: TST
TST Version 2.0 – User’s Guide
TST Version 2.0
USER’S GUIDE
INTRODUCTION ..................................................................................................2
General Description ...........................................................................................2
Models Available................................................................................................2
INSTALLATION....................................................................................................2
Unpacking..........................................................................................................2
Mechanical Installation.......................................................................................3
Electrical Wiring .................................................................................................3
Stand-alone Mode Connection:.......................................................................3
Communication mode connection :.................................................................4
CONFIGURATION AND CALIBRATION WITH THE TST SOFTWARE :............5
General Description ...........................................................................................5
System Requirements........................................................................................5
Installing the Software........................................................................................5
Uninstalling the Software ...................................................................................6
Read the TST configuration ...............................................................................6
Programming the TST........................................................................................7
Changing the TST configuration : ...................................................................8
TAG Name : .................................................................................................8
Calibration Date : .........................................................................................9
Filtering : ......................................................................................................9
Failed Value : ...............................................................................................9
Changing Operating Range and Units ............................................................9
Calibration.....................................................................................................10
Output Calibration ......................................................................................11
“One Point” Calibration ..............................................................................12
“Two Point” Calibration ..............................................................................13
1
TECHNICAL SPECIFICATIONS ........................................................................14
INTRODUCTION
General Description
The Temperature Sensor Transmitter (TST) is a temperature sensor
based on a Resistive Temperature Detector (RTD) coupled to an
electronic circuit with an on board microprocessor. It gives a linear current
output (4 to 20 mA) proportional to the temperature detected by the
sensing element. The RTD element and the electronics are all integrated
in the same mechanical assembly in order to reduce wiring and installation
cost. The TST can be fully re-calibrated and re-scaled over its entire range
of operation via the digital communication link and the user friendly TST
software. Those features make the TST very versatile, easy to use and
able to fullfill all your application requirements.
Models Available
The TST is available in many different mechanical configurations and two
temperature limits.
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TST Version 2.0 – User’s Guide
• -328 to 1112 oF (-200 to 600 oC)
• -58 to 392 oF (-50 to 200 oC)
Consult the catalog information for permutation of the different mechanical
assemblies.
INSTALLATION
Unpacking
The TST comes as a stand-alone version or with the calibration
accessories kit. In the stand-alone version, the TST is delivered, prescaled and calibrated, with the user’s guide only. In the calibration version,
the complete package includes:
• The TST sensor (pre-scaled and calibrated).
• The Calibration interface module.
• The Wall adapter (24 VDC – 200 mA).
• The TST Windows calibration software (CD-ROM).
• User’s guide.
Please verify that no parts are missing and do a visual inspection of the
TST and accessories to ensure that none of the components have been
damaged during transportation. If you notice something not normal please
immediately advise your distributor and do not proceed with the
installation.
Mechanical Installation
This will vary according to the assembly type. The same standard
installation practices should be observed as with a standard RTD
assembly. Care should be taken so the transition, housing the electronics,
is maintained within the specified temperature limits (-40°C to 80°C).
Electrical Wiring
The TST is a loop power device that comes with four wires. Two of them
(Black and Red) are for the loop power and the two others (Green and
White) are for communication.
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TST Version 2.0 – User’s Guide
*** IMPORTANT ***
If the TST is not connected with the communication module, the two
communication wires (Green and White) have to be shorted or left
isolated from each other and isolated from any voltages or ground.
The TST can be connected in stand-alone mode or with the
communication module. Figure #2 shows the electrical connection in
stand-alone mode and Figure #3 in the communication mode.
Stand-alone Mode Connection:
• Connect the Red wire (or terminal #1) from the TST to the positive
side of the power supply.
• Connect the Black wire (or terminal #2) from the TST to the positive
side of the current indicator or measurement device.
• Connect the negative side of the current indicator or measurement
device to the negative side of the Power Supply in order to close the
series current loop.
_
Red
+
9 to 36 VDC
White
Green
FIGURE #2
Black
+
TST Version 2.0 – User’s Guide
Communication mode connection :
• Do not connect power until all of the steps below have been
completed in order, making sure the last connection made is
power to the interface module.
• Connect the Red wire from the TST to the terminal #1 (i+) of the
communication module.
• Connect the Black wire from the TST to the positive side of the current
indicator.
• Connect the negative side of the current indicator to the terminal #2 (I-)
of the communication module.
• Connect the White wire from the TST to the terminal #3 (Tx) of the
communication module.
• Connect the Green wire from the TST to the terminal #4 (Rx) of the
communication module.
• Connect the RS-232 (DB9-Female) to the serial port of the computer.
• Power the communication module by plugging the Wall Adapter to the
120 VAC first, then connect it to the interface module. In this
arrangement, the TST is powered by the communication module.
4
CURRENT INDICATOR
TST
Wall Adapter 120 VAC to 24 VDC
Black
PC
COMMUNICATION MODULE
+
Last connection
made
Red
DB9-Female
RxTxi-i+
White
Green
RS-232
FIGURE #3
TST Version 2.0 – User’s Guide
CONFIGURATION AND CALIBRATION WITH THE OPTIONAL TST
SOFTWARE :
General Description
The TST can be re-scaled and re-calibrated over its entire operating
range. To perform re-scaling and re-calibration you need to have the TST
Software installed on your computer and the TST connected in
communication mode configuration (see Figure #3).
System Requirements
To install the TST Software, you need these minimum system
requirements:
• Pentium I – 300 MHz or better
• 5 MB of Hard Disk space
• 16 MB of RAM
• Windows 95, 98, NT 4.0 or 2000
• 1 serial port
5
Installing the Software
*** IMPORTANT ***
If you already have an old version of the TST Software on your
computer you must first uninstall it. To do so, use the Windows
Add/Remove Program utility in the Control Panel.
Window 95 :
• Copy all the files from the WIN95 directory located on the CD-ROM to
a temporary directory on you computer.
• Run the “SETUP.EXE” program located in the temporary directory.
• The TST-Setup program will automatically start.
• By default, the TST Software will be installed in the “Program
Files\TST” directory. You can change the installation directory by
clicking on the “Change Directory” button during the setup procedure.
• To complete the installation, click on the graphical button, showing a
computer, located in the upper left part of the TST Setup window.
• After the installation is complete, the TST Software will be accessible
via the Start-Program menu of Windows.
• You can delete the installation files copied in the temporary directory
after the installation is complete.
TST Version 2.0 – User’s Guide
Windows 98, NT, 2000 :
To install this version you need to have Microsoft Installer configured on
your computer. If this is not the case, you will not be able to run the
“TST.MSI” file. You have to download Microsoft Installer from the
Microsoft Web Site or use the Windows 95 version of the TST installation
program.
• Copy all the files from the WIN2000 directory located on the CD-ROM
to a temporary directory on you computer.
• Run the “TST.MSI” program located in the temporary directory.
• The TST Setup program will automatically start.
• By default, the TST Software will be installed in the “Program
FilesTST” directory. You can change the installation directory by
clicking on the “Change Directory” button during the setup procedure.
• After the installation is complete, the TST Software will be accessible
via the Start-Program menu of Windows.
• You can delete the installation files copied in the temporary directory
after the installation is complete.
6
Uninstalling the Software
To uninstall the software, use the “Add/Remove Program” utility in the
Control Panel of Windows. The program and all its associated files will be
automatically deleted from your computer.
Read the TST configuration
By launching the TST Software, the configuration of the TST connected to
the communication module will be automatically read by the computer and
the main window of the TST software will appear on the screen (Figure
#4).
If there is no TST connected or if the communication module is not
powered, a communication error message will appear before the opening
of the main Window. You must then make the appropriate connection (see
the Electrical Wiring section) and click on the “Read” button to download
the information.
By default, the TST Software is configured to read on the COM1 serial
port. If the communication module is connected to another communication
port, a communication error will be generated during the startup. Once the
main window appears, you can then select, in the Configuration section
of the main window (upper left corner), the port on which the device is
connected (COM1 to COM4) and click on the “Read” button to download
the information.
TST Version 2.0 – User’s Guide
The second section of the main window, called TST, contains the buttons
“Read” and “Program”. The “Read” button activates the download of the
information from the TST. The “Program” button launches the Calibration
and programming window.
7
The right section of the main window, called “TST Configuration”, contains
all the information downloaded from the device connected to the
communication module. The downloaded information consist of the TAG
identification, the serial number, the temperature range for which the
device is set and the last calibration date.
At the bottom of the main window, a text box called “Message” shows the
error or status messages.
Programming the TST
To access the programming window, simply click on the “Program” button
located in the TST section of the main window. The programming window
(FIGURE #5) allows you to change the TST configuration, the operating
range and re-calibration of the device.
FIGURE #4
TST Version 2.0 – User’s Guide
8
FIGURE #5
Changing the TST configuration :
The TST configuration includes the TAG name, the last calibration date,
the filtering option and the failed output mode.
TAG Name :
The TAG name is used to identify the device. It can contain a
maximum of eight (8) alphanumeric characters. To set or change
the TAG name simply enter the value in the text box called TAG in
the GENERAL section of the programming window (upper left
corner). If the name entered is more than eight characters only the
first eight will be saved. To download the TAG name to the TST,
click on the “SET” button in the GENERAL section. The “SET”
button also updates the calibration date as well as the filtering
option.
Calibration Date :
To modify the last calibration date value, simply enter the new date
in the text boxes called “Calibration Date”, located in the GENERAL
section of the programming window. The date has to be entered
under the format Year/Month/Day. Once the date is entered
correctly, click on the “SET” button, located in the GENERAL
section, to download the value to the TST. The “SET” button also
updates the TAG name as well as the filtering option.
Filtering :
The filtering option allows the user to set the time response of the
digital filter implemented in the TST. There are four (4) different
settings. The first one is “none” which means the response time of
the output is almost instantaneous. The other settings are 1, 3 and
5 seconds. To change the filter response time, simply click on the
selection box called “Filtering”, choose the appropriate setting and
click on the “SET” button located in the GENERAL section. It is
recommended to set filtering to 1 sec. The “SET” button will also
update the TAG name as well as the calibration date.
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TST Version 2.0 – User’s Guide
Failed Value :
The failed value represents the output value at which the
transmitter will be set if a failure is detected on the Resistive
Temperature Detector. The two available choices are “Down”,
which correspond to an output of 2.5 mA, and “Up”, which
correspond to an output of 24 mA. To set the failed value click on
the radio button, in the SENSOR FAILURE SETTINGS section,
corresponding to your choice and then click on the “SET” button,
located in the same section, to update the setting in the TST.
Changing Operating Range and Units
The TST can be re-scaled within its operating range at any time.
The user can choose among a list of thirteen (13) different preset
ranges or enter the values manually and retain standard factory
accuracy over any range. This section of the software,
called OPERATION RANGE, allows also the user to change the
engineering units from Celsius to Fahrenheit and vice versa.
To change the engineering units, simply click on the selection box
called “Units” and select the desired value. Once it is selected, click
on the “SET” button located in the OPERATION RANGE section.
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TST Version 2.0 – User’s Guide
NOTE : Changing the engineering units or the range of
operation will reset any high precision 1 point or 2 point
calibration previously made but default factory accuracy of
±.25 oC + 0.40% of reading, is retained.
Each time you click on the “SET” button of the OPERATION
RANGE section, a warning message will appear on the screen,
telling you that the calibration parameters will be lost. You can then
choose to proceed or not with the new settings. When the units are
changed, the operation range is also changed to the same
numerical values but in different engineering units. (Ex. If a TST is
configured as a 0 to 100 oC and the units are changed to
Fahrenheit then the device will become configured as a 0 to 100
oF). When the units are changed, the “Preset Range” values are
also automatically changed to match the new engineering units.
To re-scale the TST to one of the pre-defined range, simply click on
the “Preset Range” selection box, choose the appropriate range
and then click on the “SET” button located in the OPERATION
RANGE section. Once the new range is set, the “Actual Reading”,
located in the bottom of the Programming window, will be updated
with the new values.
To re-scale the TST in a range that is not included in the “Preset
Range”, simply enter the value, in the current engineering units,
that correspond to a reading of 4 mA and 20 mA, in their respective
text boxes. To apply this new range, click on the “SET” button
located in the OPERATION RANGE section. Once the new range is
set, the “Actual Reading”, located in the bottom of the
“Programming” window, will be updated with the new values.
If the selected range is out of the construction limit of the TST an
error message will appear on the screen and the TST will not
accept this new setting. Be aware also that changing the range of
operation or engineering units will reset all the calibration values.
Calibration
Three types of calibration are available through the TST software.
The first one is the output calibration, which allows the user to
calibrate the output of the TST against a current indicator. The
second type is the “One point” calibration, which allows the user to
calibrate the TST against one known temperature value in the
operating range. Finally, the third type is the “Two point” calibration,
which allows the user to calibrate the TST against two known points
in the operating range.
Output Calibration
The output calibration feature permits a calibration of the current
output against a current loop indicator independent of sensor
temperature. All the TSTs are already output calibrated at the
factory against a high accurate current indicator. If the user wants a
perfect match between a current loop indicator and the TST, he can
re-calibrate the output. This is performed by first clicking on the “4
mA” button located in the OUTPUT CALIBRATION section of the
“Programming” window. This will force the TST output to the
theoretical value of 4.00 mA. Once the button is pressed, a small
dialog box appears on the screen (Figure 6) allowing the user to
set the output current to exactly 4.00 mA by clicking on the “+” or “-“
button. When the output is perfectly at 4.00 mA, as measured on
reference loop indicator, then click on the “Set” button to record the
new value in the TST
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TST Version 2.0 – User’s Guide
Figure 6
The next step is the calibration of the 20 mA. To perform that
operation, simply click on the 20 mA button located in the OUTPUT
CALIBRATION section of the “Programming” window. This will
force the TST output to the theoretical value of 20.00 mA. Once the
button is pressed, a small dialog box appears on the screen
(Figure 6) allowing the user to set the output current to exactly
20.00 mA by clicking on the “+” or “-“ button. When the output is
perfectly at 20.00 mA, as measured on reference loop indicator,
then click on the “Set” button to record the new value in the TST.
The last step is the calculation and recording of the output
calibration parameters. This is performed by clicking on the
“Process” button located in the OUTPUT CALIBRATION section of
the “Programming” window. The TST program then reads the 4.00
mA and 20.00 mA values that have been set earlier in the TST,
calculates the output calibration parameters and downloads the
new values in the TST memory.
The output calibration can be performed at any time and not
necessarily in order (i.e. the 20 mA output adjustment can be
performed before the 4 mA adjustment). If necessary, only one of
the 4 mA or 20 mA can be performed. When the output calibration
parameters are calculated, the values are taken from the TST
memory.
“One Point” Calibration
The “One point” calibration allows the user to offset the output of
the TST to match perfectly a known temperature to which the TST
is set.
To perform this calibration, a known and stable temperature
reference is required. Set the TST to this known reference
temperature and wait for 5 minutes to be sure that the reading is
stabilized. To establish what the output current should be at this
reference temperature, the user can enter the value of the
reference temperature (in the current engineering units) in the
corresponding text box (“For a Temperature of “) located in the “1
POINT CALIBRATION” section of the “Programming” window. The
theoretical output current will then be automatically calculated and
displayed in the corresponding text box (“theoretical output should
be “). If the current indicated by the loop current indicator does not
match the theoretical value, then click on the “+” or “-“ button of the
“Adjustment” section to adjust the output reading to the correct
value. Every time the “+” or “-“ buttons are clicked, the new value is
downloaded and saved in the TST memory.
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TST Version 2.0 – User’s Guide
NOTE : The “Actual Reading” section located on the bottom
of the 1 POINT CALIBRATION section displays values
calculated by the TST program. This calculation is based on
the digital reading (via the RS232) and may not correspond
exactly to the current output read by the loop indicator. For
better accuracy, use the reading from a calibrated loop
indicator to make the adjustments.
“Two Point” Calibration
The “Two point” calibration allows the user to calibrate the TST
against two known reference temperatures in the operation range.
This calibration is performed in three steps.
The first step is the “First Point” reading. The TST has to be at a
known and stable reference temperature inside its operating range.
The first point must be at a lower value then the “Second Point”.
Once the output reading from the TST is stable, enter the
temperature value in the text box called “First Point:” located in the
2 POINTS CALIBRATION section, and click on the corresponding
“Read” button. The input value is then saved in the TST memory as
well as the temperature reference for the first point.
The second step is the “Second Point” reading. The TST has to be
at a known and stable reference temperature inside its operating
range. The second point must be at a higher value then the “First
Point”. Once the output reading from the TST is stable, enter the
temperature value in the text box called “Second Point:” located in
the 2 POINTS CALIBRATION section, and click on the
corresponding “Read” button. The input value is then saved in the
TST memory as well as the temperature reference for the second
point.
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TST Version 2.0 – User’s Guide
The third and last step is to perform the calculation of the
calibration parameter. This is done by clicking on the “Process”
button located in the 2 POINTS CALIBRATION section. This action
causes the TST software to upload the first and second points
values from the TST and calculates the calibration parameters from
a linear extrapolation between the two points recorded. The new
calibration parameters are then downloaded and saved in the TST
memory. The output of the TST is automatically recalculated
without having to re-initialized it.
NOTE :
The reading of the first and second calibration points do not have to
be performed at the same time or in the order indicated.
TST Version 2.0 – User’s Guide
TECHNICAL SPECIFICATIONS
14
Input :
Sensor Temperature Ranges :
Output :
Power Supply :
Supply Effect :
Accuracy :
Maximum Loop Resistance :
Sensor Open Circuit :
Warmup :
RFI Effect :
Isolation :
Temp. Effects :
Long Term Drift :
Mechanical Properties
Probe Material:
Probe Finish :
Probe and Housing Material :
Cable Material :
Enclosure:
Protection:
Storage Temp. Range:
Operating Temp. Range:
Maximum Operating Pressure:
RTD, type Pt100 class B
See TST catalog datasheet for standard ranges,
Customer re-scalable between
-200°C to 600°C, no re-calibration
required
4-20 mA loop powered, linear to
temperature
9-48 VDC, polarity protected
0.01%/V
±(0.25°C + 0.4% of reading) largest
error, normally less
(Vsupply – 7) * 40 ohms
Upscale 24 mA or Downscale 2.5
mA
30 seconds
1% or less typical
500 VDC Input/Output
< 0.01% FS/oC
< 0.1% FS
316 Stainless Steel
Ra 32 typical
316 Stainless Steel, welded to probe
PVC, PTFE or Stainless Steel
armored over PTFE. Custom
material available.
Many types available, see catalog
NEMA 6P, hermetically sealed
-40°C to 80°C
-40°C to 80°C (Transition only)
Threaded Version :1500 PSIG Max
Clamp Version : Per clamp rating (500 PSIG Max.)
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