Troubleshooting
November 2022
Configuration and Use Manual
00809-0100-1600
2. Select Continue .
3. Per the screen message, contact Emerson if you have any questions before you select the Finished button.
These screens will not display again until another new core processor has been detected.
17.7 Density measurement troubleshooting
17.7.1 Erratic density reading
Cause
• Normal process noise
• Two-phase flow
• Line pressure too low
• The flow rate is too high for the installation
• Pipe diameter too small
• Contaminants or suspended solids in the process gas
• Contaminants or suspended solids in the process fluid
• Vibration in the pipeline
• Erosion or corrosion
Recommended actions
1. Check your process conditions against the values reported by the device.
2. Increase the density damping value.
3. Decrease the flow rate.
4. Check for two-phase flow.
5. Ensure that line pressure or sample pressure meets installation requirements.
6. Increase back pressure to minimize bubble formation.
7. Minimize vibration in the pipeline.
8. Increase the pipe diameter.
9. Install a flow control method (bypass, flow chamber, expander, etc.).
10. Perform Smart Meter Verification.
17.7.2 Inaccurate density reading
Cause
• Problem with process fluid
• Incorrect density calibration factors
• Wiring problem
• Incorrect grounding
178 Micro Motion 1600 with Ethernet Transmitters
Configuration and Use Manual
00809-0100-1600
Troubleshooting
November 2022
• Two-phase flow
• Plugged or coated sensor tube
• Incorrect sensor orientation
• RTD failure
• Physical characteristics of sensor have changed
Recommended actions
1. Check the wiring between the sensor and the transmitter.
2. Check the grounding of all components.
3. Check your process conditions against the values reported by the device.
4. Ensure that all of the calibration parameters have been entered correctly. See the sensor tag or the calibration sheet for your meter.
5. Check for two-phase flow.
6. If two sensors with similar frequency are too near each other, separate them.
7. Purge the sensor tubes.
8. Perform Smart Meter Verification.
17.7.3 Unusually high density reading
Cause
• Plugged or coated sensor tube
• Incorrect density calibration factors
• Inaccurate temperature measurement
• RTD failure
• In high-frequency meters, erosion, or corrosion
• In low-frequency meters, tube fouling
Recommended actions
1. Ensure that all of the calibration parameters have been entered correctly.
See the sensor tag or the calibration sheet for your meter.
2. Purge the sensor tubes.
3. Check for coating in the flow tubes.
4. Perform Smart Meter Verification.
17.7.4 Unusually low density reading
Cause
• Two-phase flow
• Incorrect calibration factors
• In low-frequency meters, erosion or corrosion
Configuration and Use Manual 179
