GX-6000 Operator’s Manual Start Up, Bar Hole Mode • 218
6 . The GX-6000 is now operating in Bar Hole Mode. The pump is off and
the following screen appears.
The combustible gas and oxygen channels are displayed along with the
battery charge level and station ID.
NOTE: If the oxygen sensor fails or if the oxygen channel is turned off, no
oxygen indication will display on the Bar Hole Mode screen.
Performing a Fresh Air Adjustment, Bar Hole Mode
Before using the GX-6000, it is recommended to set the fresh air readings for
the target gases by performing a fresh air adjustment. This will set the
combustible gas channel to zero and the OXY channel to 20.9%.
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-6000, Bar
Hole Mode”.
3 . Press and hold the ▲AIR button. The pump will start and the display
will prompt you to hold the ▲AIR button.
4 . Continue to hold the ▲AIR button until the display prompts you to
release the ▲AIR button. The GX-6000 will set the fresh air reading for
the combustible gas and oxygen channels as it counts down from 8. Once
the countdown has finished, start up is complete and the unit is ready for
bar hole testing.
4:07
CH4
O2
0
%LEL
20.9
%
VALVE 3
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