RKI Instruments GX-2009, Руководство оператора

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62 • Maintenance GX-2009 Operator’s Manual
8. Replace each battery with a new one. Note the polarity markings on the circuit board and
batteries when installing each battery. Tabs on the bottom of each battery match up with
holes in the circuit board.
9. Reinstall the rear case to the front case with the four case screws.
Checking the Combustible Gas Sensor’s Condition
If you suspect that the combustible sensor has been contaminated or may be reaching the end
of its operational life, do the following to confirm it is still operating properly:
1. Perform a fresh air adjustment as described in “Performing a Fresh Air Adjustment” on
page 34.
2. Apply calibration gas as described in “Performing a Span Adjustment in ONE CAL” on
page 40.
3. Instead of setting the gas reading to match the calibration gas concentration, adjust the gas
reading as high as possible.
4. A new sensor can typically be adjust to more than twice the calibration gas concentration.
If you are not able to adjust the combustible gas reading to be at least 10% higher than the
calibration gas concentration, then the sensor should be replaced as soon as possible.
Holes match up
with tabs on
bottom of battery.
Holes match up
with tabs on
bottom of battery.
Figure 22: Front Case With Batteries Removed
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