GX-2012 Operator’s Manual Start Up, Leak Check Mode • 89
13.The GX-2012 is now operating in Leak Check Mode.
The combustible gas reading is displayed along with the battery
charge level.
Performing a Fresh Air Adjustment, Leak Check Mode
Before using the GX-2012 for leak checking, it is recommended to set
the fresh air reading by performing a fresh air adjustment. This will
set the combustible gas channel to zero. RKI Instruments recommends
allowing the GX-2012 to run for as long as possible after turning on
the instrument before performing a fresh air adjustment.
1. Find a fresh-air environment. This is an environment free of toxic
or combustible gases and of normal oxygen content (20.9%).
2. Turn on the unit as described above in “Turning On the GX-2012,
Leak Check Mode” on page 83.
3. Press and hold the AIRS button. The display will prompt you to
hold the AIRS button.
4. Continue to hold the AIRS button until the display prompts you
to release the AIRS button. The GX-2012 will set the fresh air
reading for the combustible channel. Once the fresh air adjustment
has finished, start up is complete and the unit is ready for leak
testing.
5. If you would like to calibrate the GX-2012 while in Leak Check
Mode, follow the same instructions described in “Calibration
Mode” on page 57.
0
5000
ppm
ppm
LEAK CK MODE
CH4
F.S.
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