RKI Instruments GX-2003 Manual - Manual (Page 51)

GX-2003 Operator’s Manual Bar Hole Testing • 44
5. At the end of the sample period, the pump will shut off and the
audible alarm will sound, then the peak methane reading and the
minimum oxygen reading for the sample period will be displayed.
6. If a high concentration of methane is encountered, a fresh air
purge can be performed to purge the hose, probe and GX-2003 of
gas before the next bar hole test. To perform a purge, do the
following:
• Remove the probe from the barhole so the instrument will
draw fresh air.
• Press and release the DISPLAY (ADJ) button. The display will
now indicate “FRESH AIR PURGE . . .” below the oxygen
reading and the purge time will begin counting down from 30
seconds in the lower right corner of the display above the
battery icon.
• When the purge is complete, the screen will return to the initial
Bar Hole Mode screen.
7. If other bar holes will be tested, proceed to the next bar hole and
repeat steps 3 - 6.
8. To cancel a bar hole measurement or fresh air purge that is in
progress, press and release the DISPLAY(ADJ) button.
9. To exit Bar Hole Mode and return to the Mode Select Screen at any
time, press and hold the (SHIFT)▼ button for 5 seconds.
PCH4 0%LEL
EOXY 20.9VOL%
A ENTER:MEASURE
K DISP :PURGE
B.H.MODE 21:09
CH4 0%VOL
OXY 20.9VOL%
B.H.MODE 21:09
30
FRESH AIR PURGE . . .
CH4 0%LEL
OXY 20.9VOL%
ENTER:MEASURE
DISP :PURGE
B.H.MODE 21:09