Failure to exercise proper electrostatic discharge precautions, such
as wearing a grounded wrist strap may reset the processor or
damage electronic components, resulting in interrupted operations.
Ensure that the area is a safe operating environment.
1. Secure the field device and remove it from service.
2. Determine whether the AO is used in a PID loop. If it is, remove the
PID loop from service and take it off scan.
3. Connect to ROCLINK 800.
4. Select Configure > I/O > AO Points.
5. Record the EU values shown on the Analog Output screen.
6. Remove the field wiring from the AO port of the IO terminal block.
7. Connect a current meter in series between the AO + and AO–
terminals.
8. Select the Analog Output point from the list.
9. Using ROCLINK 800, set the output to minimum EU value.
10. Verify that the current meter indicates the low current needed for the
loop.
11. If the value does not meet the minimum current required, alter the
Adjusted A/D 0% counts found in the AO point on the ROCLINK
800 screen until it does meet current requirements.
12. Using ROCLINK 800, set the output to maximum EU value.
13. Using the current meter, verify that maximum loop current is being
supplied.
14. If the value does not meet the maximum current required, alter the
Adjusted A/D 100% counts found in the AO point on the ROCLINK
800 screen until it does meet current requirements.
15. Set the AO EU value to the range noted in step 5.
16. Connect the field device.
17. If the AO was used in a PID loop, re-enable the PID loop and verify
the operation is adequate.
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