MVI56E-AFC / MVI69E-AFC ♦ Enhanced Liquid and Gas Flow Computer
Configuring Gas Parameters
ControlLogix® and CompactLogix™
Setup and Configuration Guide
ProSoft Technology, Inc.
Page 85 of 151
10 Configuring Gas Parameters
10.1 Gas Parameter Descriptions
The
Gas
area of the
Meter Configuration
dialog is visible when the product group is set
to
Gas
.
Parameter
Description
Isentropic
exponent
The ratio of (specific heat and constant pressure) to (specific heat at constant
volume).
Default specific
gravity or
Default relative
density
Normally, the AFC modules use the Detail Characterization Method of the AGA 8
standard to calculate the density of the gas from its composition as given by the molar
analysis. The density is used in all subsequent calculations. When AGA 8 cannot be
applied because no analysis is available (no components selected, or analysis is all
zero), then this value supplies the density at reference conditions (relative to the
density of air at reference conditions) to be submitted for the output of AGA 8.
You can override the default specific gravity or default relative density value by taking
the steps in section 10.2 on page 87.
Summary of Contents for MVI56E-AFC
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