7-3
7.3 Breathing System Maintenance
When cleaning the breathing system, replace any parts that are visibly cracked, chipped,
distorted or worn. For details, refer to 13 Installations and Connections and 14 Cleaning
and Disinfection.
7.4 Flow Sensor Calibration
NOTE
z Do not perform calibration while the unit is connected to a patient.
z During calibration, do not operate the pneumatic parts. Do not move or press the
breathing tubes especially.
z During calibration, the drive gas pressure must be kept above 0.3 MPa. Otherwise
calibration failure may result.
To calibrate the flow sensor, do as follows:
1. Make sure that the supply gas pressure is normal.
2. Turn off all fresh gas inputs.
3. Set the bag/mechanical ventilation switch to the
position.
4. Remove the folding bag from the bellows and reinstall the bellows housing.
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