Emerson Micro Motion 1600 - 16.9.2 Consistently incorrect Frequency Output measurement; 16.9.3 Erratic Frequency Output

• 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
• Output not powered
• Wiring problem
• Channel not configured for desired output
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 expected frequency output signal using ProLink or by navigating to Service Tools → Service
Data → View I/O levels.
8. Verify the receiving device, and the wiring between the transmitter and the receiving device.
9. Verify that the channel is wired and configured as a Frequency Output.
10. Perform a loop test with a multimeter or frequency counter.
16.9.2 Consistently incorrect Frequency Output 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.
16.9.3 Erratic Frequency Output
Cause
There is Radio Frequency Interference (RFI) from the environment.
Recommended action
Check for radio frequency interference.
Configuration and Use Manual Troubleshooting
MS-00809-0200-1600 May2024
Configuration and Use Manual 187