RKI Instruments EAGLE 2 Manual - Manual (Page 285)

EAGLE 2 Operator’s Manual Start Up, Bar Hole Mode • 275
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%).
2. Turn on the unit as described above in “Turning On the EAGLE 2,
Bar Hole Mode” on page 270.
BAR HOLE MODE
CH4 0 %LEL
OXY 20.9 vol%
ENTER: MEASURE
ADJUST: PURGE