Overview
A special measurement unit is a user-defined unit of measure that allows you to report
process 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 Density Special Unit Base.
Density Special Unit Base is the existing density unit that the special unit will be
based on.
2. Calculate Density Special Unit Conversion Factor as follows:
a. x base units = y special units
b. Density Special Unit Conversion Factor = x÷y
3. Enter Density Special Unit Conversion Factor.
The original density value is divided by this conversion factor.
4. Set User-Defined Label to the name you want to use for the density unit.
The special measurement unit is stored in the transmitter. You can configure the
transmitter to use the special measurement unit at any time.
Example: Defining a special measurement unit for density
You want to measure density in ounces per cubic inch.
1. Set Density Special Unit Base to g/cm3.
2. Calculate Density Special Unit Conversion Factor:
a. 1 g/cm3 = 0.578 oz/in3
b. 1÷0.578 = 1.73
3. Set Density Special Unit Conversion Factor to 1.73.
4. Set User-Defined Label to oz/in3.
7.6
Configure line density calculations using
ProLink III
ProLink III Device Tools > Configuration > Process Measurement > Line Density
Overview
The line density parameters provide data for line density measurement. Line density can
be reported as a process variable. Line density is required to measure calorific value and
energy flow.
Configure process measurement using ProLink III
Configuration and Use Manual 63
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