GX-3R Pro Operator’s Manual Appendix B: Maintenance Mode • 174
Tips for Using Maintenance Mode
• To scroll from one menu item to the next, press and release AIR. To reverse the scrolling
direction:
a. Press and hold AIR.
b. Immediately press POWER/MODE and then release both buttons.
c. The scrolling direction returns to the original direction when you exit and reenter a menu.
• To skip an item when a question is asked, press and release AIR.
• To enter an item and to save any changes, press and release POWER MODE.
• To change a flashing parameter, press and release AIR. 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.
• To exit an entered menu item without saving a change, press and hold AIR and POWER
MODE for a few seconds.
Performing a Calibration (GAS CAL)
See “Performing a Calibration (GAS CAL)” on page 75 for instructions.
Performing a Gas Test (GAS TEST)
The GAS TEST menu item allows you to apply gas to the instrument and see all alarm
indications except for the buzzer indication. There is no buzzer indication in the GAS TEST
menu even though the buzzer sounds in the event of a real gas alarm condition while in Measuring
Mode.
Preparing for a Gas Test
To perform a gas test on the GX-3R, you will need:
• A calibration cylinder. The concentrations should be above the alarm condition you want
to check. Standard alarm points are listed on page 9.
• 0.25 LPM fixed flow regulator
• Non-absorbent tubing
• Calibration cup
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