Terminal Reference Junction.
On-board Reference Junction Sensor.
8-pin Input Connector.
Quad J or K Thermocouple.
On-board Digital Signal Processor.
Choice of type J or K thermocouples.
10Hz Averaged output.
Interface to Tiger Meter.
Crystal Controlled Line
Frequency Rejection.
50 / 60Hz line frequency rejection.
State-of-the-art Electromagnetic Noise
Suppression Circuitry.
Ensures signal integrity even in harsh EMC environments.
Multiple inputs processed with powerful signal conditioning.
Ideal for multi-temperature control systems, IST3 and IST4 monitor up to four individual thermocouple sensors at 10 Hz averaged output rate. A choice of industry J or K type thermocouples with an on-board temperature sensor for reference junction compensation provide a versatile interface for temperature measurement tasks.
Input Module
Order Code Suffix
Input Channels
Thermocouple Type
Input Sensitivity
Zero Drift
Span Drift
Non-linearity
Input Noise
Signal Processing Rate
Reference Junction
Hardware Module Specifications
Four independent channels, zero X-talk and 16-bit resolution.
Industry standard J or K type (software selectable).
0.08 V / count maximum. 40 nV / C typical. 5 ppm / C full scale maximum. 0.003% 5of full scale maximum.
160 nV p-p typical.
10 Hz averaged output rate on all channels.
On-board solid state sensor referenced thermal connection to terminal block socket. Resolution better that 0.1 C.
Output Rate
Sensor Selection
Line Frequency Rejection
Broken Thermocouple
Software Module Specifications
Fixed 10 Hz averaged per channel.
Choice of J or K, software selectable.
50/60 Hz, software selectable. [OVER] on display indicates broken thermocouple.
Software senses a broken thermocouple and causes the display to flash [OVER]. Note, only seen if that display is the current display. Otherwise, it can be checked through the view mode.
IST3-4 Data Sheet (NZ362)
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
Page 1
TC1
TC2
TC3
TC4
Figure 1 IST3/IST4 Quad Thermocouple Smart Input Module
Thermocouple signals, TC1, TC2, TC3, and TC4, are then individually softw are selected for the four input channels. Either signal can be selected f or CH1 via Code 2, CH2 via Code 4, CH3 via Code 5, and CH4 via Code 6.
Note: Once selected, the thermocouple type is the same f or all four channels.
Note: The same thermocouple signal can be selected f or two or more channels.
Input Signal 1 (TC1)
Input Signal 2 (TC2)
Input Signal 3 (TC3)
Input Signal 4 (TC4)
Figure 2 IST3/IST4 Smar t Setup Registers Operational Flow Diagram
Reference junction sensor
thermally bonded to the connector block.
Reference
Junction
Sensor
Quad Input
Analog to
Digital
Convertor
16-bit
Resolution
Microcontroller
Page 2
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
IST3-4 Data Sheet (NZ362)
Figure 3 IST3/IST4 Quad Thermocouple Functional Schematic Diagram
This section describes the procedures to enter the controllers code structure and configure the input module for the following standard settings:
60 Hz Line Frequency (suitable for areas operating on 60 Hz power supplies).
J Type Thermocouple.
Thermocouple TC1 selected for channel 1 (CH1).
All other configuration settings are described in the following pages.
Step 2
Pass the Brightness
Mode and enter
Code 2
Step 6
Return to Code 2 and select the
thermocouple for CH1
Example
Example
Step 8
Save settings and
return to Code 2
Step 4
Enter the Smart
Register 1 (SMt1)
Setup Mode
Step 9
Exit Code 2 and return to the operational
display
Programming Tip
The f ollowing procedure uses a DI-50 displa y.
The readings sho wn may differ for other displa y versions.
IST3-4 Data Sheet (NZ362)
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
Page 3
The f ollowing prog ramming procedures co ver all the steps required to configure smar t input module IST3/IST4. Steps 1 to 5 describe how to select the line frequency and the thermocouple type through smart register 1 (SMT1).
Steps 7 to 12 describe how to select a specific ther mocouple from the output registers f or channels 1, 2, 3, or 4 as required.
Press the
and
buttons at the same time to enter the main programming mode.
Press the
button three times to enter Code 2. Set Code 2 to [X77].
This setting enters the smart register 1 code setup menu.
Note: The output registers in the 3rd digit are specific to the Quad Thermocouple input module. These registers vary for each different smart input module.
Press the
button.
This men u pro vides settings unique to smart register 1 of input module IST3/4.
Using the
1st digit and the thermocouple type in the 3rd digit.
buttons, select either 50 or 60 Hz line frequency rejection in the
2nd digit settings are not rele vant and should be left at z ero (0).
Note: 10 Hz is the average output for all four thermocouple inputs.
Operational Temperature Range
0 C to 700 C
0 C to 1100 C
J Type Thermocouple
K Type Thermocouple
Approximate contin uous w orking temper ature r ange of measur ing junction. Not related to wire diameters and conducted insulation.
Refer IEC 584.2, 1982 (BS EN 60584.2, 1993) Inter nal Standards for Thermocouple Characteristics.
5 Press the
button. The display returns to [Cod_2] [X77].
6 Using the
button, reset the 3rd digit to z ero [X70] to leave the smart register 1 menu.
Note: Leaving the 3rd digit as 7 means the display constantly cycles between [Cod_2] and [SMt1].
Press the
and
buttons at the same time to retur n to the operational display.
Select a thermocouple output from the output register map of the required c hannel
Press the
and
buttons at the same time again to re-enter the main prog ramming mode,
then press the
button three times to enter Code 2.
Page 4
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
IST3-4 Data Sheet (NZ362)
Set Code 2 to [X7X]. Select the required processing rate for CH1 in the 1st digit and the required register map settings in the 3rd digit.
2nd digit settings are not rele vant and should be left at z ero (0).
Note: The output register map is different for each smart input module type.
Set Code 4 to [0X0]. Select the required register map settings f or CH2 in the 2nd digit.
Enter Code 5 and select the required register map settings f or CH3 in the 3rd digit.
Note: The output register map is different for each smart input module type.
Enter Code 6 and select the required register map settings f or CH4 in the 3rd digit.
Press the
button to save the settings.
Press the
time to return to the operational display.
buttons at the same
and
IST3-4 Data Sheet (NZ362)
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
Page 5
As the calibration procedure requires a calibr ation source that can output stab le V signals, calibration of the four channels is nor mally done in the factory prior to shipping.
Calibrating 4 Channels for K Type Thermocouple If user calibration is required, the f ollowing procedure should be f ollowed. It is assumed that the user has a thermocouple calibration source available. When the controller is switched on, allow a few minutes warmup time to let the ref erence junction stabilize to the connector ter minal block temperature.
1 Setup Smart Register 1 (SMT1)
See Page 4 and carry out Steps 1 to 7 to select the required line frequency and thermocouple type.
2 Connect to the Calibrated Source
Connect a standard K type ther mocouple plug to the calibration source.
3 Connect to the Input Module
Connect the standard K type ther mocouple cable to the rele vant pins on the input module of the thermocouple input to be calibrated.
Thermocouple
Calibration
Source
K Type
Thermocouple
Plug
K Type
Thermocouple
Wire
IST3/IST4
Terminal Block
4 Set the Low Setting
a) Set the calibration source to 0 C.
b) Enter [CAL] [111] and set to [ZEro] setting.
5 Set the High Setting
Set the calibration source to 100 C.
Set to [SPAn] setting to 100.0.
6 Repeat Steps
Repeat Steps 2 to 4 f or all required ther mocouples and channels.
See 2-point Calibration Mode Example on Page 7 for a step-by-step calibration procedure.
Note:
One thermocouple can be assigned to one or more c hannels (e.g. TC1 assigned to CH1 to CH4), but each channel can accept only one thermocouple input.
Page 6
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
IST3-4 Data Sheet (NZ362)
From Step 6
T HERE STSTARART HERE 2-point Calibration
Mode Example
Step 1
Enter the
brightness
mode
Step 2
Pass the brightness
mode and the enter calibration mode
Step 4
Enter calibration
mode [111] for 2-point calibration of CH1
LOW
Signal
Step 6
Set reading for zero load into meter and enter span mode
Example
HIGH
Signal
Step 7
7.1. Adjust display to desired reading for
span input
Example
Step 8
Save zero and span settings and re-enter
calibration mode
Step 9
Select the no function calibration mode [000]
Step 10
Save calibration mode
[000] setting and enter Code 1
Step 11
Exit Code 1 and return to the operational display
IST3-4 Data Sheet (NZ362)
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
Page 7
1st Digit
2nd Digit 3rd Digit
1st Digit
2nd Digit 3rd Digit
1st Digit
2nd Digit 3rd Digit
1st Digit
2nd Digit 3rd Digit
1st Digit
2nd Digit 3rd Digit
For product details visit www.texmate.com
Tel: 1-760-598-9899 USA 1-800-839-6283 Thats 1-800-TEXMATE
Page 8
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
IST3-4 Data Sheet (NZ362)
Texmate is an American manufacturer of high durability industrial grade panel meters, bar graphs, and transducers. Texmate's meters are frequently equipped with relays and various signal outputs for industrial automation applications and are known for their extremely long service life.