a) x base units = y special units
b) Mass Flow Conversion Factor = x ÷ y
4. Enter Mass Flow Conversion Factor.
The original mass flow rate value is divided by this value.
5. Set Mass Flow Label to the name you want to use for the mass flow unit.
6. Set Mass Total Label to the name you want to use for the mass total and mass inventory unit.
The special measurement unit is stored in the transmitter. You can configure the transmitter to use the
special measurement unit at any time.
Defining a special measurement unit for mass flow
You want to measure mass flow in ounces per second (oz/sec).
1. Set Base Mass Unit to Pounds (lb).
2. Set Base Time Unit to Seconds (sec).
3. Calculate Mass Flow Conversion Factor:
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.
4.2.2 Configure Flow Damping
Display
Menu > Configuration > Process Measurement > Flow Variables > Flow Damping
ProLink III Device Tools > Configuration > Process Measurement > Flow > Flow Rate Damping
Field Communicator Configure > Manual Setup > Measurements > Flow > Flow Damping
Flow Damping controls the amount of damping that will be applied to the measured mass flow rate. It affects
flow rate process variables that are based on the measured mass flow rate. This includes volume flow rate and
gas standard volume flow rate.
Flow Damping also affects specialized flow rate variables such as temperature-corrected volume flow rate
(API referral) and net mass flow rate (concentration measurement). It is not applied to the flow rate received
via the frequency input.
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 Flow Damping to the value you want to use.
Configure process measurement Configuration and Use Manual
March 2019 MMI-20025166
34 Micro Motion Model 5700 Transmitters with Configurable Outputs
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