246 • Bar Hole Testing
EAGLE 2 Operator’s Manual
2. Turn on the unit as described above in “Turning On the EAGLE 2, Bar Hole Mode”
3. Press and hold the AIR
▲
YES button. The display will indicate that a demand zero is
taking place and prompt you to hold the AIR
▲
YES button.
4. Continue to hold the AIR
▲
YES button until the display prompts you to release it.
The EAGLE 2 will set the fresh air reading for the CH
4
and oxygen channels. Start up
is complete and the unit is now ready for bar hole testing.
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 you to
initiate an air purge cycle to purge gas from the EAGLE 2 after a sample is taken. See
“Setting the Bar Hole Measurement Time” on page 115 to change the bar hole sample
time.
In a low-light environment, press and release the RANGE
▼
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 Backlight Delay
Setting” on page 110 to program backlight duration. If CONFIRMATION ALERT is
turned on in the Setup Mode menu, the EAGLE 2 will alert you based on the setting you
choose once every 15 minutes to confirm that it’s operating.
Performing a Bar Hole Test
1. Start up the EAGLE 2 as described in “Start Up, Bar Hole Mode” on page 241.
2. Take the EAGLE 2 to the bar hole that will be tested.
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%.
BAR HOLE MODE
CH4 0 vol%
OXY 20.9 vol%
MEASURING...
30 SEC
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