User manual

Publication 1797-6.5.1 - April 1999
5-8 Calibrating Your Module
Calibrating the 1797-OE8
Module
To calibrate the 1797–OE8 module use the following general method:
1. Attach the precision current meters(s) to the module.
2. Send a message to the module to set its Output Enable bit to 1. This
enables its outputs.
3. Send a message to the module instructing it perform Zero Min and Max
Scale Coefficients.
4. Await an echo message from the module announcing that it has
performed Zero Min and Max Scale Coefficients.
5. Send a message to the module instructing it to perform Min Scale
Calibration (1mA) on the channel(s).
6. Await an echo message from the module announcing that it has
performed Min Scale Calibration.
Precision
Current
Sources
Precision
Current
Sources
Row A
10 2 3 4 5 6 7 8 9101112131415
28 29 30 31 32 3322 23 24 25 26 2716 17 18 19 20 21
41660
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 –