278 • Bar Hole Testing EAGLE 2 Operator’s Manual
3. Insert the probe into the bar hole and press and release the ENTER
button. The pump will turn on, the display will indicate
“MEASURING...” below the oxygen reading, and the sample
period will begin with the sample period counting down in
seconds in the lower right corner of the display. The CH
4
channel
will be displayed in vol%.
4. After 15 seconds of sampling, if the CH
4
reading is less than 5
vol%, the CH
4
channel will automatically begin displaying in the
units you selected earlier. If you selected the methane channel to
be displayed in vol%, then after 15 seconds, the reading will
remain in vol%.
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 EAGLE 2 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.
BAR HOLE MODE
CH4 0 vol%
OXY 20.9 vol%
MEASURING...
30 SEC
BAR HOLE MODE
E CH4 0 vol%
A OXY 20.9 vol%
K ENTER: MEASURE
ADJUST: PURGE
P
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