4a Tests and Calibration 4.X Software
1006-0453-000 05/04
4a-29
4a.3.19 O2 Calibrations
The O2 Calibrations take into account the altitude setting. Before starting the
calibrations, ensure that the altitude setting (in Calibrations/System
Configuration) is set to the appropriate altitude for the machine location.
Note:
a circle module is required for all calibrations.
For the 21% O2 calibration, software reads the A/D value for the O2 sensor
when the O2 sensor is exposed to room air (21% O2).
• If this A/D value is not within the tolerance, the calibration fails.
• If the calibration passes, the A/D value is stored in the EEPROM.
The sensor must be calibrated at 21% O2 before calibration at 100% O2.
Figure 4-31 • O2 Calibrations menu
Remarks
Remove the O2 sensor from the breathing system and expose it to room air.
The displayed reading should be 21% ±2% to pass the calibration
requirements.
Reinstall the sensor that passed the 21% test in the breathing system and
expose it to 100% O2. Select “Start 100% O2 Calibration” to begin test.
If it displays readings higher or lower than required to pass, replace the
sensor.
Summary of Contents for Aestiva 7900 SmartVent
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