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 > Mass 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 Mass Unit.

Base Mass Unit

 is the existing mass 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 Mass Flow Conversion Factor as follows:

a. x base units = y special units
b. Mass Flow Conversion Factor = x/y

4.

Enter Mass Flow Conversion Factor.

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.

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:

Configure process measurement

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