Galvanic Applied Sciences 943-TGS-CE, Operation Manual

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Revision 5 64 August 2021
spectrum is the same or very similar to the factory reference, this could indicate an
issue with plugging in the sample probe. Refer to Section 7.9 for details on how to clear
a plugged probe.
The New Reference button is used to make the analyzer use the currently displayed
transmission spectrum to calculate a new zero baseline without carrying out a full zero
calibration cycle. Highlight the New Reference button by using the F4 / F3 keys, then
pressing
↵
.
Pressing New Reference DOES NOT cause the analyzer to automatically go into
back purge mode. Be sure the analyzer is in back purge mode prior to using this
function otherwise the calculated analyzer results after calculating the new
reference WILL NOT BE VALID!
4.7 Absorbance Panel
The
Absorbance
panel shown in Figure 37 shows the currently calculated absorbance
spectrum as well as the current concentration of all of the analyzed components in the tail gas
stream.
Figure 37: Absorbance Panel
The absorbance spectrum is calculated by subtracting the current transmission spectrum from
the transmission spectrum that was obtained the last time the analyzer carried out a zero
calibration cycle OR when the New Reference button was pressed on the Spectrum panel,
whichever was most recent. The y-axis of this spectrum is absorbance units (AU). When the
analyzer is in back purge mode, the absorbance spectrum should be a horizontal line at an
absorbance of 0 AU. If it is not, and the analyzer is NOT in a fault condition, first confirm that
the current transmission spectrum in back purge is largely similar to the factory reference
spectrum, then immediately carry out a new zero calibration cycle OR use the New Reference