4.6.2 Configure Temperature Damping
Display Menu → Configuration → Process Measurement → Temperature → Damping
ProLink III Device Tools → Configuration → Process Measurement → Temperature → Temperature Damping
Field communicator Device Settings → Process Configuration → Temperature → Temperature Unit
Temperature Damping controls the amount of damping that will be applied to temperature data from the
sensor. Temperature Damping is not applied to external temperature data.
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 process variable.
At the end of the interval, the internal value of the process variable (the damped value) will reflect 63% of the
change in the actual measured value.
Procedure
Set Temperature Damping to the desired value.
• Default: 4.8 seconds
• Range: 0.0 to 80 seconds
Note
If a number greater than 80 is entered, it is automatically changed to 80.
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 temperature can result in increased
measurement error.
• Whenever the damping value is non-zero, the damped value will lag the actual measurement because the
damped 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 damped value.
Effect of Temperature Damping on process measurement
Temperature Damping affects all processes and algorithms that use temperature data from the internal
sensor RTD.
Temperature compensation
Temperature compensation adjusts process measurement to compensate for the effect of temperature on the
sensor tubes.
API Referral
Temperature Damping affects API Referral process variables only if the transmitter is configured to use
temperature data from the sensor. If an external temperature value is used for API Referral, Temperature
Damping does not affect API Referral process variables.
Concentration measurement
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
Configure process measurement Configuration and Use Manual
May2024 MS-00809-0200-1600
44 Emerson.com
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