Galvanic Applied Sciences 943-TGS-CE, Operation Manual

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Revision 5 54 August 2021
Figure 25: Relay Indicators
The relay indicators provide at-a-glance status information. If all the indicators are green,
this indicates that the analyzer is functioning normally with no faults or warnings active. If the
Status indicator is red, this indicates the analyzer has at least one fault active, and is unable
to sample until the fault condition(s) are cleared. If the Service indicator is yellow, this
indicates that maintenance will be required soon. Refer to the Indicators panel to diagnose
which fault(s) and / or warning (s) are active. See Section 4.5 for more details about specific
faults and warnings. If Mode and Control are both yellow, this indicates the analyzer is
carrying out a zero calibration For more information on the relay outputs, refer to section
3.5.2.
4.3.4 Manual Zero
The Manual Zero control is used to manually initiate a zero calibration cycle. It is shown in
Figure 26.
Figure 26: Manual Zero Control
The Model 943-TGS-CE performs a zero calibration in order to check and adjust the
analyzer’s zero baseline. It is ONLY performed when the analyzer is in back purge and the
measurement cell is filled with a gas that doesn’t absorb UV radiation in the wavelength
range of interest (i.e. instrument air or nitrogen). The zero calibration sets the absorbance
baseline to 0 AU across the entire measurement wavelength range during this process. To
initiate a Manual Zero Calibration cycle, simply use the F4 / F3 buttons to highlight the
Manual Zero control, then press
↵
. The zero calibration sequence is identical whether
triggered manually using the Manual Zero control, automatically when all existing faut
conditions are cleared and prior to the analyzer returning to sampling mode or automatically
according to the set Auto Calibration Frequency (refer to Section 4.8.4 for more details on
Auto Calibration).
No span calibration is required under normal circustances for an installed
analyzer. There is no span calibration functionality available on the Model 943-
TGS-CE.
A Manual Zero zero calibration cycle CANNOT be initiated while the analyzer has
any fault conditions (Status relay is red) present. Using this control while the
Status relay is red will have no effect.