EAGLE 2 Operator’s Manual
Description • 261
Appendix N: Using the EAGLE 2 in Inert Mode
Inert Mode is used to measure the combustible gas and/or oxygen level in a purged
environment. The oxygen alarms in this mode are both increasing and are generally set at
5.0% and 10.0%.
Description
Inert Mode is factory activated for instruments that require it. The instrument can still be
used in Normal Mode for other applications.
It is recommended that either an IR CH
4
or an IR HC sensor be installed in a unit that is
used to monitor combustible gas in Inert Mode since it does not require oxygen to work
properly. The catalytic LEL sensor does not operate at oxygen concentrations below 10%
volume. If it is necessary to use the catalytic LEL sensor in Inert Mode, a dilution fitting
must be installed. Installing a dilution fitting will affect the oxygen reading since you’re
introducing oxygen into the sample.
Alarms
The oxygen channel alarm points in Inert Mode are different from those in Normal Mode.
All other alarm point settings remain unchanged.
Since the application for Inert Mode is to detect a rising oxygen level in purged
environments, both oxygen alarms are set to rising. The factory set alarm point is 5.0%
volume for the low alarm and 10.0% volume for the high alarm. These alarm points are
user adjustable in Setup Mode. See “Updating the Alarm Point Settings” on page 106 for
instructions to set the alarm points for channels other than oxygen or to set the Normal
Mode oxygen alarm points.
Below are instructions to set the Inert Mode oxygen alarms.
1. Take the EAGLE 2 to a non-hazardous location and turn it off if it is on.
2. Press and hold the AIR
▲
YES or RANGE
▼
SHIFT buttons, then press and hold the
POWER ENTER RESET button. When you hear a beep, release the buttons.
3. The LCD will show the following screen for a few seconds with the “S” in the lower
right corner indicating the unit is entering Setup Mode.
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EAGLE 2 S
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