11 • Operation Eagle Instruction Manual
4. Verify that the Eagle is operating correctly. Use the RKI Check Kit
to easily verify correct operation of the Eagle.
WARNING: If the Eagle does not respond to verification, take it to a
known “fresh-air” environment, then perform the
demand zero procedure described in “Preparing for
Calibration” on page 41. Repeat step 4 before using the
Eagle in a potentially hazardous location.
Normal Operation
The Eagle continuously monitors the sampled atmosphere and
displays the gas concentrations present for its target gases. In a low-
light environment, press any button to turn on the display backlight.
(See “Updating the Back Light Setting” on page 36 to program
backlight duration.) If the Confirmation Beep option is turned on, the
Eagle beeps once every 15 minutes to verify that it’s on the job.
To use the probe, insert it into the monitoring area and wait a few
seconds for response.
NOTE: Response time increases with the length of the sample hose.
Very long sample hoses may require several seconds to show
response at the Eagle.
Monitoring Combustible Gas in the PPM Range
1. Start the Eagle in the LEL range as described in “Starting Up the
Eagle” on page 9.
2. Allow the combustibles sensor to stabilize (3 to 5 minutes). This
stabilization period is required for the PPM range only.
3. Press the LEL/PPM button. The Eagle displays PPM in place of
LEL% for combustible gas, and the gas reading displays in parts
per million.
4. If the PPM reading is not zero, take the Eagle to a fresh air
environment, then perform the demand zero procedure as
described in “Preparing for Calibration” on page 41.
NOTE: For the data logging option, combustible gas readings are
logged in %LEL regardless of the LEL/PPM setting.
Monitoring Combustible Gases Other than Methane
If the combustible sensor is calibrated to methane (CH
4
), use Table 4
to determine the response of other combustible gases. This table is
based on Eagles in full response mode (methane elimination switch
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