Emerson MICRO MOTION 2700, Руководство по конфигурации и использованию, Страница: 34 / 374

a. 1 lb/sec = 16 oz/sec
b.
Mass Flow Conversion Factor = 1/16 = 0.0625
4. Set Mass Flow Conversion Factor to 0.0625 .
5. Set
Mass Flow Label
to
oz/sec
.
6. Set
Mass Total Label
to
oz
.
4.1.2 Configure Flow Damping
Display
Not available
ProLink II ProLink > Configuration > Flow > Flow Damp
ProLink III
Device Tools
>
Configuration
>
Process Measurement
>
Flow
Field Communicator Configure > Manual Setup > Measurements > Flow > Flow Damping
Overview
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 reported process variable. At the end of the interval, the reported process variable
will reflect 63% of the change in the actual measured value.
Procedure
Set Flow Damping to the value you want to use.
The default value is 0.8 seconds. The range depends on the core processor type and the
setting of
Update Rate
, as shown in the following table.
Core processor type
Update Rate setting Flow Damping range
Standard Normal 0 to 51.2 seconds
Special
0 to 10.24 seconds
Enhanced Not applicable 0 to 51.2 seconds
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.
Configure process measurement
26 Micro Motion ® Model 2700 Transmitters with Analog Outputs