RKI Instruments EAGLE 2 Manual - Manual (Page 303)

EAGLE 2 Operator’s Manual Description • 293
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 115 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.