Check For Internal Electrical Problems; Check Frequency Output Fault Action - Emerson Micro Motion 5700 Configuration And Use Manual

Configuration and Use Manual
MMI-20025166
Table 17-2: Possible causes and recommended actions for excessive (saturated) drive gain
Possible cause
Over-pressurized tubes
Plugged sensor tube
Sensor case full of process
fluid
Sensor imbalance
Sensor tubes not
completely full
Two-phase flow
Vibrating element not free
to vibrate
Erratic drive gain
Table 17-3: Possible causes and recommended actions for erratic drive gain
Possible cause
Foreign material caught in sensor
tubes

17.19 Check for internal electrical problems

Shorts between sensor terminals or between the sensor terminals and the sensor case can cause the sensor to
stop working.
Possible cause
Liquid or moisture inside the sensor case
Internally shorted feedthrough
Faulty cable

17.20 Check Frequency Output Fault Action

The Frequency Output Fault Action controls the behavior of the Frequency Output if the transmitter
encounters an internal fault condition. If the Frequency Output is reporting a constant value, the transmitter
may be in a fault condition.
Procedure
1. Check the status alerts for active fault conditions.
2. If there are active fault conditions, the transmitter is performing correctly. If you want to change its
behavior, consider the following options:
Change the setting of Frequency Output Fault Action.
•
Configuration and Use Manual
Recommended actions
Contact customer support.
Check the pickoff voltages (see
zero (but neither is zero), plugged tubes may be the source of your problem. Purge the
tubes. In extreme cases, you may need to replace the sensor.
Replace the sensor.
Contact customer support.
Correct process conditions so that the sensor tubes are full.
Check for two-phase flow. See
Ensure that the vibrating element is free to vibrate.
Recommended actions
• Purge the sensor tubes.
• Replace the sensor.
Check the pickoff voltage). If either of them are close to
Check for two-phase flow (slug
Recommended action
Contact customer support.
Contact customer support.
Replace the cable.
Troubleshooting
March 2019
(continued)
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