Configure Mass Flow Cutoff - Emerson Micro Motion 5700 Configuration And Use Manual

Configure process measurement
• Default: 0.64 seconds
• Range: 0 seconds to 60 seconds
Note
If a number greater than 60 is entered, it is automatically changed to 60.
Tips
• A high damping value makes the process variable appear smoother because the reported value
changes slowly.
• A low damping value makes the process variable appear more erratic because the reported value
changes more quickly.
• The combination of a high damping value and rapid, large changes in flow rate can result in
increased measurement error.
• Whenever the damping value is non-zero, the reported measurement will lag the actual
measurement because the reported value is being averaged over time.
• In general, lower damping values are preferable because there is less chance of data loss, and less
lag time between the actual measurement and the reported value.
• The transmitter automatically rounds off any entered damping value to the nearest valid value.
Therefore, the recommended damping value for gas applications should be 3.2 seconds. If you
enter 2.56, the transmitter will round it off to 3.2.
Effect of flow damping on volume measurement
Flow damping affects volume measurement for liquid volume data. Flow damping also
affects volume measurement for gas standard volume data. The transmitter calculates
volume data from the damped mass flow data.
Interaction between Flow Damping and mA Output
Damping
In some circumstances, both Flow Damping and mA Output Damping are applied to the
reported mass flow value.
Flow Damping controls the rate of change in flow process variables. mA Output Damping
controls the rate of change reported via the mA output. If mA Output Process Variable is
set to Mass Flow Rate, and both Flow Damping and mA Output Damping are set to non-zero
values, flow damping is applied first, and the added damping calculation is applied to the
result of the first calculation.
4.2.3

Configure Mass Flow Cutoff

Display
ProLink III
Web browser
34
Menu > Configuration > Process Measurement > Flow Variables > Mass Flow Settings >
Low Flow Cutoff
Device Tools > Configuration > Process Measurement > Flow > Mass Flow Cutoff
Configuration > Process Measurement > Flow Variables > Mass Flow Cutoff
Micro Motion Model 5700 with Ethernet Transmitters