Rockwell Automation 1756-OF8I ControlLogix Eight-channel Isolated Analog I/O Modules - Manual (Page 146)

146 Rockwell Automation Publication 1756-UM540A-EN-P - May 2014
Chapter 8 Calibrate the ControlLogix Isolated Analog I/O Modules
The Attach Low Reference Ohms Sources dialog box appears, as shown
below. It indicates the channels are calibrated for a low reference and the
range of the calibration.
7. Connect a 1
Ω
precision resistor to all module channels being calibrated.
8. Click Next.
The Group Low Reference Results dialog box indicates the status of each
channel after calibrating for a low reference.
9. If channels are OK, click Next.
If any channel reports an error, return to step 7 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.