RKI Instruments GX-2003 Manual - Manual (Page 56)

49 • Start Up, Leak Check Mode GX-2003 Operator’s Manual
below, the LEL/ppm sensor has failed.
If the LEL/ppm sensor fails, it is not possible to enter Leak Check
Mode. Press and release the RESET SILENCE button to
acknowledge the failure and return to the Mode Select Screen.
Replace the failed sensor as soon as possible.
If the % volume combustible, oxygen, CO, or H
2
S sensor is
installed and fails, press and release the RESET SILENCE button to
acknowledge the failure and continue to Leak Check Mode.
Replace the failed sensor as soon as possible.
10. The GX-2003 is now operating in Leak Check Mode. The pump is
on and the following screen appears.
The methane channel is displayed along with the time and battery
charge level. L.C. MODE in the lower left corner is flashing.
Performing a Demand Zero, Leak Check Mode
Before using the GX-2003, it is recommended to set the fresh air
reading for the target gas by performing a demand zero. This will set
the CH
4
channel to zero.
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-2003,
Leak Check Mode”.
3. Press and hold the ▲AIR button. The display prompts 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-2003 will set the fresh air
reading for the CH4 channel. Start up is complete and the unit is
now ready for monitoring.
FAIL
SENSOR
<CH4 LEL> < >
< > < > < >
21:09
CH4 0 ppm
0 5
BZ ON x 1000
L.C.MODE 21:09