The Flow Direction parameter interacts with actual flow direction to affect velocity
measurement. For the simplest operation, actual process flow should match the flow
arrow that is on the side of the sensor case.
Procedure
1. Verify the actual direction of process flow through the sensor.
2. Verify the configuration of Flow Direction.
Related information
Configure Flow Direction
10.22 Check the cutoffs
If the density cutoff is configured incorrectly for your process, any density process
variables and any calculations that rely on density may be based on programmed cutoff
values rather than current density data. Additionally, if the velocity cutoff is configured
incorrectly for your process, the velocity process variable may be based on programmed
cutoff values rather than current velocity data. However, this does not affect density
measurement.
Procedure
Verify the configuration of all cutoffs.
Related information
Configure Density Cutoff
Configure Velocity Cutoff
10.23 Check for two-phase flow (slug flow)
Two-phase flow can cause rapid changes in the drive gain. This can cause a variety of
measurement issues.
1. Check for two-phase flow alerts (e.g., A105).
If the transmitter is not generating two-phase flow alerts, two-phase flow is not the
source of your problem.
2. Check the process for cavitation, flashing, or leaks.
3. Monitor the density of your process fluid output under normal process conditions.
4. Check the settings of Two-Phase Flow Low Limit, Two-Phase Flow High Limit, and Two-Phase
Flow Timeout.
Troubleshooting
162 Micro Motion
®
Compact Density Meters (CDM)
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