92 • Appendix A: Maintenance Mode GX-3R Operator’s Manual
Entering Maintenance Mode
WARNING: The GX-3R is not in operation as a gas detector while in Maintenance
Mode.
1 . Take the GX-3R 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 PASSWORD
item.
If PASSWORD is set to OFF, continue with Step 8.
If PASSWORD is set to ON (factory setting), continue with Step 5.
5 . If PASSWORD is set to ON in Maintenance Mode, a password screen appears. The first
digit flashes. 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 . Continue to Step 6.
8 . The GAS CAL menu item displays.
9 . at the top of the screen indicates that the GX-3R is in Maintenance Mode.
10 . Use AIR to move through the Maintenance Mode menu items.
PASSWORD
set to
OFF PASSWORD
set to
ON
PASSWORD
M 7:49
0 0 0 0
BUMP
M 7:49
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