42 • Inert Mode
GX-2012 Operator’s Manual
2. The error code meanings are shown below:
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 110
for instructions to set the alarm points.
Table 5: Error Code Explanation
Error Code
Explanation
000
MPU failure
010
RAM failure
021
EEPROM failure
031
FLASH memory failure
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