175
•
Appendix B: Maintenance Mode
GX-3R Pro Operator’s Manual
1. Install the calibration cup onto the GX-3R Pro. Use the label and imprinting to make sure that
the calibration cup gets installed in the correct orientation relative to the GX-3R Pro. Be sure
the calibration cup is pushed on all the way.
2. Use the tubing to connect the regulator to the inlet of the calibration cup.
Performing a Gas Test
1. While in Maintenance Mode, use AIR to place the cursor next to
GAS TEST
.
2. Press and release POWER MODE. The current gas readings display. The bottom of the LCD
indicates “GAS TEST” and “BUZZER OFF”.
3. For toxic gas cylinders (like cylinders containing H
2
S), it is important to vent the regulator
while installing it onto the cylinder. Venting the regulator during installation helps prevent air
from getting into the cylinder and degrading the gas. Open the regulator by turning the knob
counterclockwise and install it onto the cylinder.
CO/H
2
S LEL O
2
TOXIC
GX-3R Pro
AIR
POWER
MODE
Inlet
FRONT
Figure 28: Calibration Cup Installation
MAINTE
7:49
GAS CAL
GAS TEST
SENSOR DATE
MAINTENANCE
7:49
20.9 0.0
O2 % CO2 vol%
0 0 0.0
CH4 %LEL CO ppm H2S ppm
GAS TEST BUZZER OFF