Galvanic Applied Sciences 943-TGX-CE, Operation Manual

Page: 83 / 151

Revision 4 83 April 2020
Optimizing the Integration Time should ONLY be performed when the analyzer is
in back purge mode. Attempting to optimize the integration time when the
analyzer is in sampling mode may negatively affect the analyzer baseline, and
thus the analyzer’s analytical results.
As an alternative to automatically optimizing the integration time, the operator may choose
to manually adjust the integration time instead. Click on the
Set Integration Time button,
and the Set Integration Time dialog box shown in Figure 52 will appear.
Figure 52: Set Integration Time Dialog Box
Enter the desired integration time (range between 1 and 1000ms) into the field, then press
OK .
After manually editing the Integration Time, check the indicated Spectrum Peak . If the
spectrum peak displays 32000, this indicates that the peak height is off scale, as the full
scale for the spectrometer reading is 32000 A/D counts. The integration time should be
reduced until the indicated peak height drops below 32000. If the indicated spectrum peak
is less than 24000, the integration time should be increased. If the integration time is already
at 1000 ms, this indicates a problem with the analyzer’s optical system. Refer to Section 7.2
for more
details on troubleshooting the analyzer’s optical system.
When the Display Factory Reference checkbox is checked by clicking on it, the factory
reference spectrum is shown superimposed on the same axes as the currently displayed
spectrum. Take note of the following rules-of-thumb when comparing the pink trace of the
factory reference with the red trace of the current transmission spectrum:
•
The factory reference should be largely similar to the current transmission spectrum
when the analyzer is in back purge mode. If it is not, there is likely an issue with the
analyzer optical system. Refer to Section 7.2 for troubleshooting techniques.
•
The factory reference should be notably different from the current transmission
spectrum when the analyzer is in sampling mode. If the sampling 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 troubleshooting of sampling problems.
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.
Clicking 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!
5.2.5 Absorbance Page
The Absorbance page shown in Figure 53 shows identical information to the Absorbance
panel on the analyzer’s local display.