Configure Flow Damping - Emerson Micro Motion 2700 Configuration And Use Manual

Configure process measurement
Example: Defining a special measurement unit for mass flow
You want to measure mass flow in ounces per second (oz/sec).
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Configure Flow Damping

Display
ProLink III
Field Communicator Configure > Manual Setup > Measurements > Flow > Flow Damping
Fieldbus host
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 process variable. At the end of the interval, the internal value will
reflect 63% of the change in the actual measured value.
Procedure
Set Flow Damping to the value you want to use.
• Default: 0.8 seconds
• Range: 0 seconds 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
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.
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Set Base Mass Unit to Pounds (lb).
Set Base Time Unit to Seconds (sec).
Calculate Mass Flow Conversion Factor:
a. 1 lb/sec = 16 oz/sec
b. Mass Flow Conversion Factor = 1 ÷ 16 = 0.0625
Set Mass Flow Conversion Factor to 0.0625.
Set Mass Flow Label to oz/sec.
Set Mass Total Label to oz.
Not available
Device Tools > Configuration > Process Measurement > Flow
Measurement TB > FLOW_DAMPING > OD Index
Micro Motion Model 2700 Transmitters with FOUNDATION Fieldbus