30 • Chapter 3: Operation GX-3R Operator’s Manual
4 . Calibrate the GX-3R as described on pg.42.
5 . If the over range condition continues or if you are not able to successfully calibrate the
unit, you may need to replace the sensor that has triggered the over range alarm.
6 . If the over range condition continues after you have replaced the sensor, contact RKI
Instruments, Inc. for further instructions.
Responding to Battery Alarms
WARNING: The GX-3R is not operational as a gas monitoring device during a dead
battery alarm. Take the Model GX-3R to a non-hazardous area and replace
or recharge the batteries as described in “Recharging the Batteries” on
page 80.
The GX-3R is fully functional during a low battery warning. However, only 1-2 hours of
operating time remain. The amount of operating time left depends on LCD backlight use and
the alarm frequency. Recharge the battery as soon as possible as described in “Recharging the
Batteries” on page 80.
NOTE: Alarms and the LCD back light consume battery power and reduce the amount of
operating time remaining.
Responding to Sensor Failure Alarms
1 . Determine which sensor triggered the sensor failure alarm.
2 . Calibrate the failed sensor, as described on pg.42.
3 . If the sensor failure continues or if the sensor could not be calibrated, replace the sensor
as described on pg.85.
4 . If the sensor failure condition continues after you have replaced the sensor, contact RKI
Instruments, Inc. for further instructions.
Responding to Clock Failure Alarms
A clock failure alarm occurs if the unit’s internal clock malfunctions.
1 . Press and release POWER MODE to continue into Measuring Mode.
CAUTION: There will be no datalogging function if you operate the instrument after a
clock failure.
2 . Attempt to set the date using the DATE menu item in User Mode. See pg.76.
3 . If the date cannot be set correctly, contact RKI Instruments, Inc. as soon as possible.
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