CALIBRATION WITH AIR
1. Turn the 3-WAY SELECTOR VALVE to the OFF position.
2. Unscrew and remove CELL CAP by turning it counterclockwise to expose the oxygen sensor
to air for ~30 seconds while blowing and fanning air with your hand near the sensor.
3. Follow this procedure to adjust the Span Factor:
Press the SPAN Button and release. The word SPAN will appear on the LCD for 1 second and
then display the oxygen reading, while the % FLAG blinks. Quickly press the appropriate
UP/DOWN ARROW to adjust the LCD reading to 20.9%.
Once completed, wait for a few seconds. The % FLAG will stop blinking, and the Analyzer will
accept the new calibration.
5. Replace and tighten the CELL BLOCK CAP by turning it clockwise until 'hand tight'.
6. Turn the 3-WAY SELECTOR VALVE back to the SAMPLE position.
Note: Once the procedure is completed, flow Sample Gas through the Analyzer, and it will quickly
return to normal pipeline oxygen levels.
Span
Button
Up and Down
Arrow Buttons
24
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