• 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.
17.5.4 Unusually low density reading
Cause
• Two-phase flow
• Incorrect calibration factors
• In low-frequency meters, erosion or corrosion
Recommended actions
1. Check your process conditions against the values reported by the device.
2. Verify all of the characterization or calibration parameters. See the sensor tag or the calibration sheet
for your meter.
3. Check the wiring between the sensor and the transmitter.
4. Check for tube erosion, especially if the process fluid is abrasive.
5. Perform Smart Meter Verification.
17.6 Discrete Input problems
17.6.1 No Discrete Input
Cause
• Wiring problem
• Problem with external device
• Channel not configured for desired output or input
• Channel not licensed
Recommended actions
1. Verify that the external device is operating correctly.
2. Test the output from the external device.
3. Verify the wiring between the transmitter and the external device.
4. If applicable, ensure that the loop is powered.
5. Verify that the channel is wired and configured as a Discrete Input.
6. Purchase a license for the channel and upgrade the transmitter firmware.
Troubleshooting Configuration and Use Manual
March 2019 MMI-20025166
250 Micro Motion Model 5700 Transmitters with Configurable Outputs
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