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Appendix A: Maintenance Mode
OX-04 Operator’s Manual
• To exit an entered item without saving a change, press and hold AIR and POWER MODE for a
few seconds.
Performing a Calibration (GAS CAL)
See page 43 for a description of the
GAS CAL
item.
Performing a Gas Test (GAS.TEST)
The
GAS.TEST
item allows you to apply gas to the instrument and see all alarm indicators
except for the buzzer indicator. There is no buzzer indicator in the
GAS.TEST
menu even though
the buzzer sounds in the event of a real gas alarm condition while in Measuring Mode.
A gas test is not saved in logged data.
Preparing for a Gas Test
To perform a gas test on the OX-04, you need:
• Calibration gas cylinder
The concentrations should be above the alarm condition you want to check. Standard
alarm points are listed on page 7.
• A 0.25 LPM fixed flow regulator
• Non-absorbent tubing
• Calibration cup
1. Confirm that the regulator knob is turned all the way clockwise. Screw the 0.25 LPM fixed
flow regulator onto the calibration cylinder.
2. Install the calibration cup onto the OX-04. Be sure the calibration cup is installed in the
correct direction and that it is pushed on all the way.
3. Use the tubing to connect the regulator to the inlet of the calibration cup (labeled “IN”).
POW ER
MODE
AIR
Front View
Side View
