7.3.3 Perform calibration
Proceed as follows for calibration.
1. Ensure that the oxygen sensor is connected.
2. Operate the device.
3. Press the O
2
key or the menu key . The selection
bar is on Calibrate O
2
sensor.
4. Confirm your selection by pressing the dial.
Remaining calibration time is displayed.
The device then automatically switches back to the
patient menu.
5. Check the display: the oxygen sensor is working
perfectly if mean oxygen concentration is 21 %.
7.3.4 Shelf life of the oxygen sensor
The shelf life of the oxygen sensor depends on the concentration of the oxygen supplied, on
ambient temperature, on duration of use and on the device settings. Under normal conditions
(ambient temperature 21 °C, 40 % oxygen concentration) the sensor lasts 6 months.
Note:
The sensor becomes exhausted even if it is not connected.
7.3.5 Change oxygen sensor
Once the oxygen sensor is exhausted, remove it from the device. Connect a new oxygen
sensor as described in “Measure oxygen concentration (only valve ventilation)” on
page 46.
Note:
Depending on storage time and temperature, the sensor requires a little time for
measured values to stabilize. As a result, after unpacking from the original
packaging and connecting the sensor, you should wait about 30 minutes before
calibrating the new sensor.
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