• Fault condition if Fault Action is set to Internal Zero or Downscale
• Two-phase flow
• Flow in reverse direction from configured flow direction parameter
• Frequency Output Direction not set correctly
• Bad frequency receiving device
• Output level not compatible with receiving device
• Bad output circuit
• Incorrect internal/external power configuration
• Output not powered
• Wiring problem
• Channel not configured for desired output
• Channel not configured for desired input
• 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. Verify the power configuration for the Frequency Output (internal vs. external).
11. Perform a loop test.
17.10.2 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.
Troubleshooting Configuration and Use Manual
March 2019 MMI-20025166
256 Micro Motion Model 5700 Transmitters with Configurable Outputs
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