GX-3R Pro Operator’s Manual Appendix B: Maintenance Mode • 176
4. The instrument initiates alarm indications except for the buzzer. There is no buzzer indication
in the GAS TEST menu even though the buzzer sounds in the event of a real gas alarm
condition.
5. Turn the regulator knob clockwise to close the regulator.
6. Unscrew the regulator from the calibration cylinder.
7. Remove the calibration cup from the GX-3R Pro.
8. Store the calibration kit in a safe and convenient place.
9. Press and release POWER MODE to return to Maintenance Mode.
10. See “Exiting Maintenance Mode (START MEASURE)” on page 189 to return to Measuring
Mode.
Sensor/Battery Replacement Date (SENSOR DATE)
The SEN DATE menu item allows you to keep track of when the sensors and the battery were
replaced.
1. While in Maintenance Mode, use AIR to place the cursor next to SENSOR DATE.
2. Press and release POWER MODE. The combustible gas sensor’s replacement date appears.
MAINTE 7:49
GAS TEST
SENSOR DATE
BUMP TEST
MAINTENANCE
MAINTE 7:49
CH4
MM/DD/YYYY
10/12/2018
SENSOR DATE
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