Emerson Micro Motion 4200 Configuration And Use Manual page 30

Configure process measurement
April 2019
Options for Volume Flow Measurement Unit for liquid applications
The transmitter provides a standard set of measurement units for Volume Flow Measurement Unit, plus one
user-defined measurement unit. Different communications tools may use different labels for the units.
Define a special measurement unit for volume flow
Display Menu > Configuration > Process Measurement > Flow Variables > Volume Flow Settings > Units >
SPECIAL
ProLink III Device Tools > Configuration > Process Measurement > Flow > Volume Flow Rate Unit > Special
Configure > Manual Setup > Measurements > Optional Setup > Special Units > Volume Special Units
Field Communicator
A special measurement unit is a user-defined unit of measure that allows you to report process data, totalizer
data, and inventory data in a unit that is not available in the transmitter. A special measurement unit is
calculated from an existing measurement unit using a conversion factor.
Procedure
1. Specify Base Volume Unit.
Base Volume Unit is the existing volume unit that the special unit will be based on.
2. Specify Base Time Unit.
Base Time Unit is the existing time unit that the special unit will be based on.
3. Calculate Volume Flow Conversion Factor as follows:
a) x base units = y special units
b) Volume Flow Conversion Factor = x ÷ y
4. Enter Volume Flow Conversion Factor.
The original volume flow rate value is divided by this conversion factor.
5. Set Volume Flow Label to the name you want to use for the volume flow unit.
6. Set Volume Total Label to the name you want to use for the volume total and volume 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 volume flow
You want to measure volume flow in pints per second (pints/sec).
1. Set Base Volume Unit to Gallons (gal).
2. Set Base Time Unit to Seconds (sec).
3. Calculate the conversion factor:
a. 1 gal/sec = 8 pints/sec
b. Volume Flow Conversion Factor = 1 ÷ 8 = 0.1250
4. Set Volume Flow Conversion Factor to 0.1250 .
30
Configuration and Use Manual
MMI-20048166
Micro Motion 4200 Transmitters