173 • Appendix B: Maintenance Mode GX-3R Pro Operator’s Manual
Entering Maintenance Mode
WARNING: The GX-3R Pro is not in operation as a gas detector while in Maintenance Mode.
1. Take the GX-3R Pro to a non-hazardous location and turn it off if it is on.
2. Press and hold AIR, then press and hold POWER MODE. You will hear a beep after one
second. Continue to hold the buttons down.
3. When you hear a second beep, release the buttons.
4. The screen that appears depends on the setting of Maintenance Mode’s MAINT
PASSWORD item.
If MAINT PASSWORD is set to OFF, continue with Step 7.
If MAINT PASSWORD is set to ON (factory setting), continue with Step 5.
5. If MAINT PASSWORD is set to ON in Maintenance Mode, a password screen appears. The
first digit is flashing. The factory-set password is 8102 but it can be changed as desired.
6. Use AIR to select each password number then press POWER MODE to save it and move on
to the next number. To go back a number, press and hold AIR and POWER MODE for a few
seconds. To reverse the direction of change (ie. from increasing to decreasing or vice versa):
a. Press and hold AIR.
b. Immediately press POWER MODE and then release both buttons.
7. The Maintenance Mode menu displays.
8. at the top of the screen indicates that the GX-3R is in Maintenance Mode.
9. Use AIR to move through the Maintenance Mode menu items.
MAINT PASSWORD
set to
OFF MAINT PASSWORD
set to
ON
MAINTE 7:49
GAS CAL
GAS TEST
SENSOR DATE
MAINTENANCE
MAINTE 7:49
0000
PASSWORD
MAINTE 7:49
GAS CAL
GAS TEST
SENSOR DATE
MAINTENANCE
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