Rockwell Automation AADvance Controller Troubleshooting and Maintenance Manual - Manual (Page 19)

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Document: 553634
(ICSTT-RM406F_EN_P) Issue: 089:
2-5
If desired, you can include this calibration check in the proof test for the loop instead. To do this,
insert a calibrated current meter in series with the field device in step 2; use the field device to drive
the input.
Check Digital Input Module Calibration
The AADvance controller detects possible calibration drift by continually checking its measured input
values. The controller uses diverse hardware to compare two measurements. It is recommended that
you carry-out this calibration drift check every two years. You can verify that a digital input is within
the stated accuracy (0.5V) without taking a module out of service.
To check the digital input module calibration, do the following:
1) Use the AADvance Workbench to lock the input channel.
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The present input value freezes, allowing the process to continue operating.
2) Disconnect the field device at the termination assembly and connect a bench
power supply and a calibrated digital voltmeter in its place.
3) Set the bench power supply to provide 2V, verify that the input value is in the
range 1.5 to 2.5V.
4) Set the bench power supply to provide 16V, verify that the input value is in the
range 15.5 to 16.5V.
5) Set the bench power supply to provide 30V, verify that the input value is in the
range 29.5 to 30.5V.
6) Disconnect the test equipment and reconnect the field device.
Note: Apply a minimum tightening torque of 0.5 Nm (0.37 ft lb) to the terminal
screws.
7) Verify that the field device is reading an acceptable value.
8) Unlock the input channel.
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The input is back in service.
Check Analogue Output Module Calibration