Configure process measurement
5.6.3
Configure
Density Damping
Display
Not available
ProLink II
ProLink→Configuration→Density→Density Damping
Field Communicator
Configure→Manual Setup→Measurements→Density→Density Damping
Damping is used to smooth out small, rapid fluctuations in process measurement. The
Damping Value
specifies the time period (in seconds) over which the transmitter will spread changes in the reported
process variable. At the end of the interval, the reported process variable will reflect 63% of the change
in the actual measured value.
Tips
• A high damping value makes the process variable appear smoother because the reported value
must change slowly.
• A low damping value makes the process variable appear more erratic because the reported
value changes more quickly.
Procedure
Set
Density Damping
to the desired value.
The default value is 1.6 seconds. The range is 0 to 10.24 seconds. When you enter a value for
Flow
Damping
, the transmitter automatically rounds it down to the nearest valid value. The valid values for
Flow
Damping
are:
0
,
0.04
,
0.08
,
0.16
, ...
10.24
.
Effect of
Density Damping
on volume measurement
Density Damping
affects liquid volume measurement.
Density Damping
does not affect gas standard volume
measurement.
Interaction between
Density Damping
and
Added Damping
Density Damping
controls the rate of change in the density process variable.
Added Damping
controls the
rate of change reported via the mA output. If
mA Output Process Variable
is set to
Density
, and both
Density
Damping
and
Added Damping
are set to non-zero values, density damping is applied first, and the added
damping calculation is applied to the result of the first calculation.
5.6.4
Configure
Density Cutoff
Display
Not available
ProLink II
ProLink→Configuration→Density→Low Density Cutoff
Field Communicator
Configure→Manual Setup→Measurements→Density→Density Cutoff
Density Cutoff
specifies the lowest density value that will reported as measured. All density values below
this cutoff will be reported as 0.
Configuration and Use Manual
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