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Portable Oxygen Analyzer Operation
Teledyne Analytical Instruments 19
keys except the CAL and ON/OFF (I/O) keys are
inoperable until a successful calibration is achieved.
5. Note the battery display located below the oxygen readout
display. It continuously shows 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. The bar graph indicator is on continuously whenever the
instrument is powered on.
2.1.4 Calibration
The AX300-I 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 analyzer
defaults to the calibration mode with the LCD
display flashing 00.0. Only the CAL and
ON/OFF (I/O) keys are functional at this point.
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 (I/O) key.
2. Check the battery status via the bar graph.
3. If the LCD is not flashing, press the LOCK/UNLOCK key to
unlock the keys. LCD will flash indicating changes can be
made to the settings. If the batteries have just been installed
the LCD will flash 00.0
4. As with most oxygen analyzer(s) the highest level of
accuracy is achieved when calibration is conducted using
100% oxygen. After installing the flow diverter as noted in
Section 2.1.1, insert the sensor into the plastic tee and
connect to a supply of pure dry oxygen flowing at 1-2 liters
per minute.
Note: An accessory calibration assembly (P/N C53790) is
available from Teledyne for use with the R17MED sensor
Figure 2-7: Calibration
S