Operation MX300
Teledyne Analytical Instruments 20
4. Re-install the battery compartment door. When the unit is
first turned on the display will momentarily display all LCD
segments. During this period diagnostic tests are being
conducted to insure the circuits are functioning correctly.
The unit will activate the audible and visual alarms for about
1 second. The LCD will flash continuously indicating the
unit is in the unlocked position ready for calibration.
Note: When batteries are first installed or power is lost for any
reason the instrument defaults to the calibration mode. All
keys except the CAL and ON/OFF keys are inoperable
until a successful calibration is achieved.
5. To test the batteries. Press the BATT TEST key once. The
battery display, located below the oxygen readout display,
should show a bar graph of the remaining life to the batteries.
In the case of fresh batteries, it should illuminate all 5
segments from the left to the right end of the bar.
2.1.3 Calibration The MX300 should be calibrated before each use and every 8 hours
to maintain accuracy.
Whenever new batteries are installed or
removed for any reason, the oxygen monitor
defaults to the calibration mode with the LCD
display flashing 00.0. Only the CAL and ON/OFF
keys are functional at this point. On the MX300
monitor, the alarm set points will also need to be
reset after calibration is completed.
Note: For first time and for routine
maintenance calibrations, make sure
the sensor and sensor cable are
installed correctly before attempting to
calibrate the instrument
To calibrate the instrument (See Figure 2-7):
1. Turn the unit on by pressing the ON/OFF key.
2. Check the batteries by pressing the BAT key. Figure 2-7: Calibration
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