117 • Chapter 6: Maintenance GX-3R Pro Operator’s Manual
Chapter 6: Maintenance
Overview
This chapter describes troubleshooting procedures for the GX-3R Pro. It also includes procedures
for instrument cleaning, replacing and recharging the batteries, and replacing various consumable
parts.
WARNING: RKI Instruments, Inc. recommends that service, calibration, and repair of RKI
Instruments be performed by personnel properly trained for this work. Replacing
sensors and other parts with original equipment does not affect the intrinsic
safety of the instrument.
Troubleshooting
The troubleshooting table describes error messages, symptoms, probable causes, and
recommended action for problems you may encounter with the GX-3R Pro.
Symptoms Probable Causes Recommended Action
• The LCD is blank. • The unit may have been
turned off.
• The batteries may need to be
replaced or recharged.
1. To turn on the unit, press and briefly
hold POWER MODE.
2. If the unit does not turn on, replace
or recharge the batteries.
3. If the difficulties continue, contact
RKI Instruments, Inc. for further
instruction.
• The LCD shows
abnormally high or
low readings but
other gas detection
instruments do not.
• One of the sensor’s filters
may need to be replaced.
• The GX-3R Pro may need to
be recalibrated.
• The sensor for the affected
channel(s) may need
replacement.
1. Replace the sensor filter.
2. Recalibrate the unit.
3. If the difficulties continue, replace
the sensor for the affected
channel(s) and calibrate the affected
channel(s).
4. If the difficulties continue, contact
RKI Instruments, Inc. for further
instruction.
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