Emerson MMI-20019043 Manuel D’Utilisation
Overview
Damping is used to smooth out small, rapid fluctuations in process measurement. Damping
Value
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.
will reflect 63% of the change in the actual measured value.
Procedure
Enter the value you want to use for Temperature Damping.
The default value is 4.8 seconds. The range is 0.0 to 76.8 seconds.
Tips
•
•
A high damping value makes the process variable appear smoother because the reported value
changes slowly.
changes slowly.
•
A low damping value makes the process variable appear more erratic because the reported value
changes more quickly.
changes more quickly.
•
Whenever the damping value is non-zero, the reported measurement will lag the actual
measurement because the reported value is being averaged over time.
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.
lag time between the actual measurement and the reported value.
The value you enter is automaticaly rounded down to the nearest valid value. Valid values
for Temperature Damping are 0, 0.6, 1.2, 2.4, 4.8, … 76.8.
for Temperature Damping are 0, 0.6, 1.2, 2.4, 4.8, … 76.8.
Effect of Temperature Damping on process measurement
Temperature Damping
affects the response speed for temperature compensation with
fluctuating temperatures. Temperature compensation adjusts the process measurement
to compensate for the effect of temperature on the sensor tube.
to compensate for the effect of temperature on the sensor tube.
Temperature Damping
affects petroleum measurement process variables only if the
transmitter is configured to use temperature data from the sensor. If an external
temperature value is used for petroleum measurement, Temperature Damping does not
affect petroleum measurement process variables.
temperature value is used for petroleum measurement, Temperature Damping does not
affect petroleum measurement process variables.
Temperature Damping
affects concentration measurement process variables only if the
transmitter is configured to use temperature data from the sensor. If an external
temperature value is used for concentration measurement, Temperature Damping does not
affect concentration measurement process variables.
temperature value is used for concentration measurement, Temperature Damping does not
affect concentration measurement process variables.
Configure process measurement
52
Micro Motion
®
Model 2700 Transmitters with Analog Outputs