RMG GC 9300, Руководство по эксплуатации

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1 About this manual
Manual GC 9300 EN14 July, 24th 2018
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1.3 Function
The analytical computer GC 9300 is a component of the process gas chromato-
graph PGC 9300, which analyzes natural gas and biogas and provides the neces-
sary measurement values to determine the energy content and calculate the com-
pressionability factor. As a control computer, it determines the progress of the
analysis and delivers measurement results. It stores all operating parameters and
is also used for operation.
In addition to analysis control, the GC 9300 provides the following functions:
•
Calculation of calorific value, heat value, standard density, and Wobbe in-
dex from the percentages of individual gas components in accordance with
ISO 6976, and the optional calculation of the methane number.
•
Storage of analysis results in archives.
•
Comprehensive communication functions.
•
Operating mode settings for inspection purposes and analysis of gas sam-
ples.
1.4 Mode of operation
The analytical computer GC 9300 is the controller for the process gas chromato-
graph PGC 9300 and controls the analysis process in the measuring element CP
4900. In normal operation, an analysis begins as soon as the preceding analysis is
finished, wherein each analysis lasts about 3-4 minutes, depending on the variant.
The series of analyses proceeds without interruption by automatic calibrations. A
calibration, whether it takes place automatically or is started manually, 4 or 5 cali-
brating gas analyses and takes between 12 and 16 minutes depending on the de-
vice type. The calibration interval of 1 day is specified in the PTB approval.
A calibration can also be started manually at any time.
The PGC 9300 can be designed as a
single stream unit for analysis of the gas
from one extraction point or as a multi-stream unit for up to 4 extraction points.
With multi-stream units, the measured gases changes with each analysis in the
standard setting.
The basis of an analysis is the signal curve of the sensor for each column unit,
which is called a
chromatogram . Each peak in this chromatogram marks a gas
component. In the evaluation, the area under the peaks are determined, from
which polynomials are derived to calculate the proportion of gas components in