• Frequency Output Direction not set correctly
• Bad frequency receiving device
• Output level not compatible with receiving device
• Bad output circuit
• Output not powered
• Wiring problem
• Channel not configured for desired output
• Channel not licensed
Recommended actions
1. Verify that the process conditions are below the low-flow cutoff. Reconfigure the low-flow cutoff if
necessary.
2. Check the Fault Action settings.
3. Verify that the totalizers are not stopped. A stopped totalizer will cause the Frequency Output to be
locked.
4. Check for two-phase flow.
5. Check flow direction.
6. Check the direction parameters.
7. Verify the receiving device, and the wiring between the transmitter and the receiving device.
8. Verify that the channel is wired and configured as a Frequency Output.
9. Purchase a license for the channel and upgrade the transmitter firmware.
10. Perform a loop test.
15.9.2 Consistently incorrect FO measurement
Cause
• Output not scaled correctly
• Incorrect measurement unit configured for process variable
Recommended actions
1. Check the scaling of the Frequency Output.
2. Verify that the measurement units are configured correctly for your application.
15.9.3 Erratic FO
Cause
There is Radio Frequency Interference (RFI) from the environment.
Recommended actions
Check for radio frequency interference.
Troubleshooting Configuration and Use Manual
April 2019 MMI-20048166
182 Micro Motion 4200 Transmitters
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