GX-2003 Operator’s Manual Bar Hole Testing • 49
Bar Hole Testing
In bar hole mode, the you can initiate sampling for a fixed time
period to monitor for methane and oxygen in a bar hole. The factory
set time is 30 seconds. At the end of the sample period, the pump will
shut off and the peak methane and minimum oxygen levels
monitored during the sample period will be displayed. Bar Hole
Mode also allows the you to initiate an air purge cycle to purge gas
from the GX-2003 after a sample is taken. See “Setting the Bar Hole
Measurement Time” on page 72 to change the bar hole sample time.
In a low-light environment, press and release the (SHIFT)▼ button to
turn on the display backlight. Although the backlight will turn on
when any button is pressed, other buttons may initiate an undesired
operation sequence. See “Updating the LCD Back Light Time Setting”
on page 71 to program backlight duration. If CONFIRMATION BEEP
is turned on in the Setup Mode menu, the GX-2003 beeps once every
15 minutes to confirm that it’s operating.
Performing a Bar Hole Test
1. Start up the GX-2003 as described in “Start Up, Bar Hole Mode” on
page 45.
2. Take the GX-2003 to the bar hole that will be tested.
3. Insert the probe into the bar hole and press and release the
POWER/ENTER button. The pump will turn on and the sample
period will begin with the sample period counting down in
seconds in the lower right corner of the display above the battery
icon. The CH4 channel will be displayed in %VOL and B.H.
MODE will be flashing.
4. After 15 seconds of sampling, if the CH4 reading is less than 5
%VOL, the CH4 channel will automatically begin displaying in
%LEL.
CH4 0%VOL
OXY 20.9VOL%
B.H.MODE 21:09
30
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