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54 Commissioning
MEASURING OXYGEN CONCENTRATION
Oxygen can only be measured in combination with a valve tube system
with an expiration valve. Use the optionally available oxygen sensor for this.
Depending on the ambient conditions, the sensor can require up to 30 min-
utes after installation to reach signal stability.
1. Ensure that the ventilator is switched off.
2. Screw the oxygen sensor (a) into the housing gas duct (b).
3. Insert the gas duct with the oxygen sensor into the T-adapter (c).
4. Insert the T-adapter into the device’s tube connection.
5. Connect the device-connection side of the ventilation tube with the
T-adapter.
6. Insert the straight plug into the oxygen measuring tube connection
and screw on the plug by a clockwise rotation. Afterwards insert
the angled plug of the connection lead (d) into the oxygen sensor at
the top. The alarm button lights up yellow.
7. Switch the ventilator on. When the device is started, the oxygen sen-
sor is automatically calibrated and the alarm button is no longer lit. It
is calibrated against the ambient air. This presumes an oxygen con-
tent of 21 %. If the sensor is connected after the device is started, the
message “Calibrate O2 Sensor” appears on the display. The calibra-
tion of the oxygen sensor must now be started manually.
1.
Ensure that the device is in standby mode.
2. Press the OK button. “Start O2 Sensor Calibration” appears on
the display.
3. Press the OK button. After successful calibration, “OK” appears
after several seconds. If calibration was not successful, “Error”
appears. In the event of error, repeat the calibration. Should this
not be successful, exchange the oxygen sensor.
If the contact between the oxygen sensor and the device is inter-
rupted for more than 10 seconds, the O
2
sensor calibration must be
carried out again.
a
b
c
d
Fig. 23: Oxygen sensor connection