2. SET-UP PROCEDURE
2.1 Battery Installation
All MAXO2 units are powered by two, AA, alkaline batteries (2 x 1.5
Volts) and are shipped without the batteries installed. The battery
compartment is accessible from the back side of the unit. To install the
batteries:
1) With the thumb, press down on the center of the battery compartment
cover and slide the cover off of the instrument case.
2) Install the two, AA, alkaline batteries (2 x 1.5 Volts) in the unit,
observing the orientation shown on the label inside the compartment.
3) Slide the battery compartment cover back onto the case. Make sure
the tabs on the cover snap into position, securing the cover flush
against the case.
When batteries are installed in the MAXO
2, the unit initiates a self-
diagnostic test. All segments of the LCD readout are turned on for
approximately 2 seconds. On OM-25ME units, the alarm beeper sounds
and the high and low alarm LEDs are illuminated. When the diagnostic
test is completed successfully, the word "CAL" will appear on the display,
indicating that the unit is ready for calibration.
2.2 Calibrating the MAXO2
Monitor
2.2.1 Before You Begin
A protective film covering the threaded sensor face must be removed; wait
approximately 20 minutes for the sensor to reach equilibrium. Next, the
MAXO
2 Oxygen Monitor should be calibrated. Thereafter, Maxtec
recommends calibration on a weekly basis. However, more frequent
calibration will not adversely affect product performance.
More frequent calibration is recommended when:
• Calibration of the instrument should be performed when the
temperature of the gas stream changes by more than 3 degrees
Celsius.
• Changes in elevation result in calibration error of approximately 1% of
reading per 250 feet. In general, calibration of the instrument should
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