RKI Instruments EAGLE 2 Manual - Manual (Page 286)

276 • Bar Hole Testing EAGLE 2 Operator’s Manual
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 125 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 119 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 270.
2. Take the EAGLE 2 to the bar hole that will be tested.