User manual

Publication 1797-6.5.1 - April 1999
5-6 Calibrating Your Module
Calibrating the 1797-IE8
Module
To calibrate the 1797–IE8 module use the following steps:
1. Attach the precision current source(s) to the module.
2. Send a message to the module instructing it to perform Zero Min and
Max Scale Coefficients.
3. Await an echo message from the module announcing that it has
performed Zero Min and Max Scale Coefficients.
4. Apply 1mA, (minimum scale calibration input(s),) to the module.
5. Send a message to the module instructing it to perform Min Scale
Calibration.
6. Await an echo message from the module announcing that it has
performed Min Scale Calibration.
7. Apply 21mA, (maximum scale calibration input(s),) to the module.
8. Send a message to the module instructing it to perform Max Scale
Calibration.
Precision
Current
Sources
Precision
Current
Sources
Row A
10 23456789101112131415
28 29 30 31 32 3322 23 24 25 26 2716 17 18 19 20 21
41659
Ch 0 Ch 1 Ch 2 Ch 3
Ch 4 Ch 5 Ch 6 Ch 7
Row B
+ sig –
+ sig –+ sig –+ sig –+ sig –
+ sig –+ sig –+ sig –