AS3000™ Service Manual 0070-10-0683 2 - 17
Installation Guide Installation Checkout Procedure
15. Oxygen Sensor Calibration
NOTE: Oxygen Sensor Calibration can be performed in all
ventilation modes.
NOTE: See ‘‘Periodic Maintenance Schedule of Service Activities’’
on page 6-2 for when to calibrate the oxygen sensor.
a. Allow the breathing system to warm up and reach thermal equilibrium
(approximately 30-60 minutes).
b. Press the MENU key and then use the Navigator
™
Knob to scroll to the
Calibrate menu tab (see FIGURE 2-13). Select the Start Calibration button.
c. After the Start Calibration button has been selected, the screen shown in
FIGURE 2-14 or FIGURE 2-16will be displayed, instructing the user to remove the
oxygen sensor from the Breathing System and expose it to room air for at least 3
minutes before proceeding. The O
2
sensor voltage is displayed during the
calibration. This is the amplified O
2
cell voltage at the A/D converter for the oxygen
sensor.
NOTE: The O
2
sensor voltage is not displayed for UI versions 2.24
and lower.
d. Flush the O
2
sensor with air from the auxiliary output for 5-10 seconds to ensure that
no O
2
bubbles are trapped in the sensor.
NOTE: Do not shake the O
2
sensor during calibration.
NOTE: Keep the O
2
sensor in a vertical position, connector side up,
during calibration.
NOTE: Place the O
2
sensor on top of the heated block during
calibration to minimize the temperature difference from
within the heated block.
FIGURE 2-13 Calibrate Menu Tab
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