Configure Density Cutoff - Emerson Micro Motion 2700 Configuration And Use Manual

Configure process measurement
Damping is used to smooth out small, rapid fluctuations in process measurement.
Damping Value specifies the time period (in seconds) over which the transmitter will
spread changes in the process variable. At the end of the interval, the internal value will
reflect 63% of the change in the actual measured value.
Tip
Density damping affects all process variables that are calculated from line density.
Procedure
Set Density Damping to the desired value.
• Default: 1.6 seconds
• Range: 0 to 51.2 seconds
• Valid damping values: 0.0, 0.1, 0.2, 0.4, 0.8, 1.6, 3.2, 6.4, 12.8, 25.6, 51.2
The default value is 1.6 seconds. The range depends on the core processor type and the
setting of Update Rate, as shown in the following table:
Tip
• 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.
Effect of Density Damping on volume measurement
Density Damping affects liquid volume measurement. Liquid volume values are calculated
from the damped density value rather than the measured density value. Density Damping
does not affect gas standard volume measurement.
4.5.4

Configure Density Cutoff

Display
ProLink III
Field Communicator Configure > Manual Setup > Measurements > Density > Density Cutoff
Fieldbus host
36
Not available
Device Tools > Configuration > Process Measurement > Density
Measurement TB > DENSITY_LOW_CUTOFF (OD Index 38)
Micro Motion Model 2700 Transmitters with FOUNDATION Fieldbus