Emerson MMI-20019043 Manuel D’Utilisation

Display

ProLink II

ProLink

 > Configuration > Special Units

ProLink III

Device Tools

 > Configuration > Process Measurement > Flow > Special Units

Field Communicator Configure > Manual Setup > Measurements > Special Units > Volume Special Units

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.

Although you cannot define a special measurement unit using the display, you can use the display to
select an existing special measurement unit, and to view process data using the special
measurement unit.

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.

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.

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:

Configure process measurement

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