8-pin Input Connector.
Dual 4-wire RTD inputs.
State-of-the-art Electromagnetic
Noise Suppression Circuitry.
Ensures signal integrity even in harsh EMC environments.
Ultra low-noise 16-bit SD Dual Channel ATD.
Approaching 19-bit performance
with additional software filtering.
On-board Digital Signal Processor.
Produces 10Hz averaged output of each RTD Signal.
Monitors RTDs for O/C conditions.
Interface to Tiger Meter.
Crystal Controlled Line
Frequency Rejection.
50 / 60Hz line frequency rejection.
Unprecedented 0.01 accuracy on two channels.
Designed for applications in precision temperature measurement and calibration systems, the dual channel RTD input module interfaces directly with all Tiger 320 Series controllers. Using 4-wire RTDs, 0.01 resolution and repeatability is possible on each channel
Input Module
Order Code Suffix
IST5 (50 Hz Rejection) IST6 (60 Hz Rejection)
Dual Inputs
Excitation Current
Hardware Module Specifications
4-wire RTD, choice of Pt 385 or Pt 392.
800/960 sample rate per channel.
10 Hz average output per channel.
200 A constant current source.
Ratiometric referenced to ATD.
Current sense for open circuit RTD.
Resolution
0.01 on each channel.
Analog-to-Digital
Dual channel ATD convertor approaching 19-bit resolution operating ratiometric with respect to excitation current.
Line Frequency Rejection
Input Type Selection
Software Module Specifications
50/60 Hz selectable.
Select from either Pt 385 or Pt 392 for both channels.
Calibration
Easy calibration with wide operating temperatures through Tiger 320 Series software.
IST5-6 Data Sheet (NZ359)
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
Page 1
Note:
The trimpot is used dur ing factory calibrated to optimize internal RTD calibration algorithms.
Figure 1 IST5 Input Module Configured f or Two 4-wire RTD Sensors
Note:
To complete the current pathw ay use links betw een pins 5 and 6, pins 6 and 7, and pins 7 and 8 to replace the missing RTD.
Figure 2 IST5 Input Module Configured f or a Single 4-wire RTD Sensor
The Tiger meter uses three smart setup registers to configure all smart input modules. The IST5 input module requires only smart register 1 (SMT1) to be configured. See Figure 3.
RTD1 Input Signal
RTD2 Input Signal
Figure 3 IST5 Smart Setup Registers Operational Flow Diagram
Page 2
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
IST5-6 Data Sheet (NZ359)
Input module IST5 has tw o RTD inputs: RTD1 and R TD2. RTD1 is ph ysically connected to input 1 and RTD2 is physically connected to input 2 of IST5 s dual channel, 16-bit A to D con vertor. See Figure 4.
SMT1 resides in IST5 s microcontroller and allo ws you to select the R TD type to suit y our input. SMT1 applies a Pt 385 or Pt 392 linear ization table to both input 1 and input 2.
The IST5 input module produces two output registers, one for the averaged signal output from each RTD.
The data from one of these registers can be tr ansferred to a channel in the Tiger meter. All four channels can be selected for either RTD1 or RTD2, or a combination of both inputs can be selected, f or example:
RTD1 to CH1.
RTD2 to CH2.
CH3 not used.
CH4 not used.
The channels are selected through the codes in the Tiger meters main programming mode:
RTD1 or RTD2 to CH1 via Code 2.
RTD1 or RTD2 to CH2 via Code 4.
RTD1 or RTD2 to CH3 via Code 5.
RTD1 or RTD2 to CH4 via Code 6.
Figure 4 IDT5 Dual RTD Smart Input Module Functional Sc hematic
The following programming procedures cover all the steps required to configure smar t input module IST5.
Steps 1 to 7 describe how to select the line frequency and the RTD type through SMT1.
Steps 8 to 12 describe how to select 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 dual R TD input module.
These registers vary for each different smart input module.
IST5-6 Data Sheet (NZ359)
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
Page 3
Press the
button.
This men u pro vides settings unique to smart register 1 of input module IST5.
Using the
1st digit and either Pt 385 or Pt 392 the RTD type in the 3rd digit.
buttons, select either 50 or 60 Hz line frequency rejection in the
2nd digit settings are not rele vant.
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 displa y constantly cycles between [Cod_2] and [SMt1].
Press the
and
buttons at the same time to retur n to the operational display.
Select the output register for the required channels
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.
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.
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.
Page 4
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
IST5-6 Data Sheet (NZ359)
If required enter Code 5 and select the required register map settings for CH3 in the 3rd digit.
Note the output register map is different for each smart input module type.
If required enter Code 6 and select the required register map settings for 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
Calibrating the IST5 dual RTD smart input module is done in the f ollowing two steps:
Perform a simulated RTD input calibration procedure.
Perform a full scale calibration procedure.
Simulated RTD Input Calibration Procedure To gain the best performance from and linearization of RTD signals, the input module should be initially calibrated using a sim ulated RTD input signal of 32 F (0 C). Fine calibration is a means of initially calibr ating the input module using tw o 100 precision resistors to simulate an RTD input signal of 32 F. This is normally done before the input module leaves the factory. But, if recalibration is required, connect two 100 precision resistors to the input module according to the connection diagram shown in Figure 6 and carry out the following steps.
100
Resistor 1
100
Resistor 2
Trimpot
Figure 6 IST5 Fine Calibration Connection Dia gram
IST5-6 Data Sheet (NZ359)
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
Page 5
1) Ensure that the line frequency rejection and R TD type settings for SMT1 have been set. See Steps 2 and 3
of the Programming procedures.
2) Enter the main programming mode in your Tiger meter and set the offset setting to 0 (zero) and the span set-
ting to 1 (one) for CH1 and CH2 using the f ollowing codes:
for CH1 select
then press the
button.
Display toggles between
Leave the offset setting [OFF_1] at [0] and press the
button.
Display toggles between
Adjust the full scale setting [SCA_1] to [1] and press the
button.
Display returns to
for CH2 select
then press the
button.
Carry out the same steps as f or CH1 to to set the offset and full scale settings f or CH2.
3) While still in the main prog ramming mode set CH1 to displa y RTD1 and CH2 to displa y RTD2 using the f ol-
lowing codes:
for CH1 enter Code 2 and select R TD1 in the 3rd digit. See Step 9 on Page 4.
for CH2 enter Code 4 and select R TD2 in the 2nd digit. See Step 10 on Page 5.
4) While viewing CH1, adjust the trimpot until the display reads 3200 counts. This represents 32.00 F.
Both CH1 and CH2 are now calibrated.
Full Scale Calibration Procedure The RTDs can be calibrated in F or C. A calibration source is the easiest method to calibr ate a zero and full scale setting, otherwise, the known resistance values for the temperatures must be used:
RTD Pt 385:
0 C is equivalent to 100 .
100 C is equivalent to 138.5 .
For example:
Offset (low setting) is zero (0 C).
Full scale setting is 100 C.
Enter the calibration mode and carry out the procedure on Page 7 for both CH1 and CH2.
Figure 7 IST5 2-point Calibration Dia gram
Page 6
Texmate, Inc. Tel. (760) 598-9899 www.texmate.com
IST5-6 Data Sheet (NZ359)
T HERE STSTARART HERE
From Step 6
Step 1
Enter the
brightness
mode
Step 2
Pass brightness mode
and the enter calibration mode
Step 4
Enter calibration
mode [111] for 2-point calibration of CH1
Example
Step 8
Save the zero and the span settings and
re-enter the calibration
mode
Step 9
Select the no function calibration mode [000]
Step 10
Save calibration mode
[000] setting and enter Code 1
Step 6
Set the reading for zero load into the meter and enter the span mode
Example
Step 11
Exit code 1 and return to operational display
IST5-6 Data Sheet (NZ359)
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
IST5-6 Data Sheet (NZ359)
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.