GX-3R Pro Operator’s Manual Chapter 6: Maintenance • 118
Instrument Cleaning
Clean the GX-3R Pro with a cloth dampened with water if it becomes excessively dirty. Do not
use alcohol or other cleaning solvents.
• Calibration fails. • The calibration values may
not match the cylinder gas
concentrations.
• The charcoal filter or
charcoal half of the dual filter
is saturated causing an
elevated CO reading.
• The sample gas is not
reaching the sensors because
of a bad connection.
• The calibration cylinder may
be out of gas or is outdated.
• The sensor for the affected
channel(s) may need
replacement.
1. Make sure the GX-3R Pro has been
properly set up for calibration.
2. Change the charcoal filter or dual
filter.
3. Check all calibration tubing for
leaks or for any bad connections.
4. Verify that the calibration cylinder
contains an adequate supply of fresh
test sample.
5. If the fail condition continues,
replace the sensor(s).
6. If the difficulties continue, contact
RKI Instruments, Inc. for further
instruction.
• Heart symbol at the
top of the screen
becomes steadily on
or disappears
• A microprocessor error has
occurred.
• Contact RKI Instruments, Inc. for
further instruction.
• Charge LED
alternates between
green and orange
• Charging environment is
outside the allowed 0 - 40°C
charging temperature range.
• Move the charger to a location that is
within the allowed 0 - 40°C charging
temperature range.
Symptoms Probable Causes Recommended Action
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