User Manual

Rockwell Automation Publication 1756-UM540A-EN-P - May 2014 147
Calibrate the ControlLogix Isolated Analog I/O Modules Chapter 8
The Attach High Reference Ohms Sources dialog box appears. It indicates
the channels are calibrated for a high reference and the range of the
calibration.
10. Connect a 487 Ω precision resistor to all module channels
being calibrated.
11. Click Next.
The Group High Reference Results dialog box indicates the status of each
channel after calibrating for a high reference.
12. If channels are OK, click Next.
If any channel reports an error, return to step 10
and click Retry until the
status is OK.
If the error persists indefinitely, click Stop to exit calibration. The channel
remains calibrated to the accuracy level achieved at factory calibration.
IMPORTANT
After you connect the precision resistor, we recommend that you wait
for a minimum of two minutes before proceeding to the next task to
obtain the highest calibration accuracy.