Galvanic Applied Sciences 943-TGS-CE, Operation Manual

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Revision 5 83 August 2021
The X-axis (time) for these trend graphs cannot be changed. However, should the data
be found to be often off the scale, it is possible to change the y-axis (concentration) scale
to ensure that all data is on the scale. To change the Y-axis scale, right click on the graph
for which the scale is to be changed, then select Y-axis Range . The dialog box shown in
Figure 49 will then appear.
Figure 49: Trend Graph Y-Axis Range Change Dialog Box
When the trend graph y-axis range is changed, the concentration range given in the trend
header will change to reflect the new range.
Changing the displayed scale on the Air Demand or H2S/SO2 trend graphs
does NOT change the scale on the analog outputs for these parameters. These
scales are for display purposes ONLY and have no effect on any other aspect
of the analyzer operation.
5.2.2 Calibration Matrix Page
The Model 943-TGX uses a spectrometer that connects to the control computer via a USB
connection for the collection of the spectrum data needed for the calculation of concentration
values and the air demand value. The spectrometer is shown in Figure 50.
Figure 50: Spectrometer
Every spectrometer has a uniquely determined Calibration Matrix which allows the control
computer to convert the spectrum data it reads from the spectrometer into measured
concentration values for every measured component. The Calibration Matrix is a 12-column
x 530 row (older versions of the analyzer firmware use a 9 column by 530 row) matrix that is