80 • Appendix A: Maintenance Mode
04 Series for CO(-H2)
Performing a Calibration (GAS CAL)
See pg.42 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 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.
A gas test is not saved in logged data.
Preparing for a Gas Test
To perform a gas test on the CO-04C, you need:
•
A calibration gas cylinder. The concentrations should be above the alarm condition
you want to check. Standard alarm points are listed on pg.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 CO-04C. 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
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