Galvanic Applied Sciences 943-TGS-CE, Operation Manual

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Revision 5 106 August 2021
2. Place the analyzer in
Offline
mode using the Online / Offline control on the
Analysis
2 panel. (Refer to Section 4.3.1)
3. Place the analyzer in back-purge by clicking the Back Purge check box on the
Analysis 1 panel OR by pressing the F6 key on the keypad. The displayed
concentration and air demand outputs should stabilize to a near zero readings within
seconds. Use a stopwatch to measure the time required for the readings to drop from
stable process values to stable zero values. Record the stabilized zero concentration
output values.
The offset from zero will vary based on length of time since the last zero
calibration cycle (manually initiated or automatic).
4. On the Spectrum panel, observe the raw scan signal and compare the shape of the
scan trace to the Factory Reference . Note any extreme deviations from the factory
referene. Record the value in the Peak Height field in approximate A/D counts
(±1,000).
5. If the value in the Peak Height field is less than 16,000, the signal peak height should
be optimized using the Optimize Integ. Time button. Refer to Section 4.6.
6. Return to the Analysis 1 panel. Ensure that the Status indicator is green (Normal) and
the Service indicator is also green (Normal). Check the displayed concentration values.
If they are not very close to zero (±0.02% for all indicated values) a Manual Zero
should be performed. Refer to Section 4.3.4.
7. Return the analyzer to Sample mode by clicking on the Sample checkbox on the
Analysis 1 panel OR by pressing the F6 key on the keypad. Observe and record how
long it takes for the concentration readings to stabilize at the process value. Record
the stabilized process values. A long response time to a stabilized sample reading may
indicate plugging of the sample system or filter, or inadequate aspirator drive air flow.
Record any observed anomalies and/or valve position adjustments made.
The response time from back purge to stabilized sample values should be
>30 seconds, but the exact value depends on a variety of factors, including
probe length and instrument air pressure.
8. Return the analyzer to Online by toggling the Online / Offline control back to the green
Online state.