ProSoft Technology PTQ-AFC - Manual (Page 73)

PTQ-AFC ♦ Modicon Quantum Platform Quick Start
Liquid and Gas Flow Computer for Hydrocarbon Products User Manual
ProSoft Technology, Inc. Page 73 of 259
June 23, 2011
6.7.4 Gas Product Overview
The gas compressibility calculations are based on molar analysis concentrations
of up to 21 components, using the Detail Characterization Method of AGA8
(1992). The module automatically generates alarms if the sum of the molar
concentrations is not 100%
Configure the analysis settings using the AFC Manager (Meter Configuration /
Analysis Config
) as follows. This window allows the selection of the
components(Component Selection Map) and stream precision (Precision and
Stream Assignment – version 2.06.000 or higher). The sample ladder logic
assumes that all components are selected so check all components at the
Component Selection Map window.
Enter the gas analysis concentrations by clicking at the Analysis button.You can
also update the concentrations through the backplane as it will be later shown at
this User Manual.
The module records events every time a molar concentration value changes. For
applications that involve gas chromatograph devices, this feature might not be
desirable because it is expected that the values should frequently change. You
can disable this feature using AFC Manager (Meter Configuration / Control
Options
/ Treat Analysis as Process Input).