Flow Measurement Problems; Discrete Output Readings Reversed; Flow Indication At No Flow Conditions Or Zero Offset; Erratic Non-Zero Flow Rate At No-Flow Conditions - Emerson Micro Motion 5700 Configuration And Use Manual

Troubleshooting
March 2019

17.7.3 Discrete Output readings reversed

Cause
• Wiring problem
• Configuration does not match wiring
Recommended actions
1. Verify the output wiring.
2. Ensure that Discrete Output Polarity is set correctly.

17.8 Flow measurement problems

17.8.1 Flow rate reported as zero when flow is present
Cause
The process condition is below cutoff.
Recommended actions
Verify the cutoffs.

17.8.2 Flow indication at no flow conditions or zero offset

Cause
• Misaligned piping (especially in new installations)
• Open or leaking valve
• Incorrect sensor zero
Recommended actions
1. Verify all of the characterization or calibration parameters.
See the sensor tag or the calibration sheet for your meter.
2. If the reading is not excessively high, review the live zero. You may need to restore the factory zero.
3. Check for open or leaking valves or seals.
4. Check for mounting stress on the sensor (e.g., sensor being used to support piping, misaligned piping).
5. Contact customer service.

17.8.3 Erratic non-zero flow rate at no-flow conditions

Cause
• Leaking valve or seal
• Two-phase flow
• Plugged or coated sensor tube
252 Micro Motion Model 5700 Transmitters with Configurable Outputs
Configuration and Use Manual
MMI-20025166