46 • Inert Mode
Gas Tracer Operator’s Manual, CSA Version
3. If the error code is anything but 031 as shown above, the instrument cannot be
used. Contact RKI Instruments, Inc. as soon as possible.
If the error code is 031, you may press and release the RESET SILENCE button
to continue to normal operation if the instrument must be used temporarily.
CAUTION:
There will be no datalogging function if you operate the instrument after a
031 system failure. Contact RKI Instruments, Inc. as soon as possible.
Responding to Microprocessor Failure
If your unit experiences a microprocessor failure, the heart symbol at the top of
the screen will be steadily on or steadily off. The unit cannot be used in this case.
Contact RKI Instruments, Inc. as soon as possible.
Inert Mode
Inert Mode is used to measure the combustible gas and/or oxygen level in a
purged environment. In order for the instrument to operate in Inert Mode, the
oxygen alarm must be set to H-HH operation in which both alarms are increasing.
The oxygen Warning and Alarm points are factory set at 5.0% and 10.0%.
It is recommended that the %volume sensor be installed in a unit that is used to
monitor combustible gas during Inert Mode operation 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
during Inert Mode operation, 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 Warning and 10.0% volume for the Alarm. These alarm
points are user adjustable in Maintenance Mode. See “Updating the Alarm Point
Settings” on page 139 for instructions to set the alarm points.
Start Up and Operation
1. With the oxygen alarm pattern set to H-HH, start up the Gas Tracer as
described in “Turning On the Gas Tracer, Normal Mode Only” on page 25.
2. Once the warm up sequence is complete, the Normal Operation Screen will
display and INERT will appear along the bottom of the display.
0
20.9
0
%LEL
%
ppm
CH
4
O
2
INERT
CO
