RKI Instruments GX-2003 Betreibershandbuch PDF herunterladen (Seite 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.

CH4 0%LEL

OXY 20.9VOL%

ENTER:MEASURE

DISP :PURGE

B.H.MODE 21:09

CH4 0%VOL

OXY 20.9VOL%

B.H.MODE 21:09

FRESH AIR PURGE . . .

CH4 0%LEL

OXY 20.9VOL%

ENTER:MEASURE

DISP :PURGE

B.H.MODE 21:09

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RKI Instruments GX-2003 Betreibershandbuch Seite 51