EAGLE 2 Operator’s Manual
Start Up, Bar Hole Mode • 245
14. If the EAGLE 2 experiences a sensor failure during start up, a screen indicating which
sensor failed appears and the buzzer sounds a pulsing tone twice per second. In the
example below, the TC %volume CH
4
sensor has failed.
If one of the combustible sensors, LEL or TC, fails, it is not possible to enter Bar Hole
Mode. Press and release the POWER ENTER RESET button to acknowledge the
failure and return to the Mode Select Screen. Replace the failed sensor as soon as
possible.
If the oxygen sensor fails, press and release the POWER ENTER RESET button to
acknowledge the failure and continue to Bar Hole Mode. The gas reading for the
oxygen sensor will be replaced by “XXX”. Replace the failed sensor as soon as
possible.
If any other sensor that is installed fails, press and release the POWER ENTER
RESET button to acknowledge the failure and continue to Bar Hole Mode. Replace
the failed sensor(s) as soon as possible for use in Normal Mode.
15. The EAGLE 2 is now operating in Bar Hole Mode. The pump is off and the following
screen appears.
Only the methane and oxygen channels are displayed.
NOTE:
The units for the methane channel can be changed using the RANGE
▼
SHIFT
button. Press and release the RANGE
▼
SHIFT button until the desired units,
ppm, LEL, or vol%, are displayed.
NOTE:
If measuring the combustible gas in ppm units, for maximum sensor stability,
allow 3-5 minutes for the sensor to warm up. The small increment size in the
lower range of a ppm measurement can cause instability if the unit is not
properly warmed up.
Performing a Demand Zero, Bar Hole Mode
Before using the EAGLE 2, it is a recommended to set the fresh air readings for the target
gases by performing a demand zero. This will set the CH
4
channel to zero and the OXY
channel to 20.9%.
1. Find a fresh-air environment. This is an environment free of toxic or combustible
gases and of normal oxygen content (20.9%).
FAILED SENSOR(S)
< > < >
< > < >
ENTER TO CONTINUE
<CH4>
BAR HOLE MODE
CH4 0 %LEL
OXY 20.9 vol%
ENTER: MEASURE
ADJUST: PURGE
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