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4.3.2 Flow Calibration (factory)
NOTE
z Factory flow calibration is necessary in case of replacing the monitor board,
expiratory valve assembly or three-way valve assembly.
z When a great deviation is detected between the measured value of the built-in
flow sensor and that of the standard flow measurement device, you need to
perform factory flow calibration.
This calibration is intended for the flows sensors in the breathing circuit, ventilator flow
sensor, and also inspiratory valve. The standard flow measurement device is used to calibrate
the flow sensors and inspiratory valve.
4.3.2.1 Calibration Procedures
NOTE
z Make sure that the tubes are not leaky when connected.
z Do not move or press the tubes during calibration.
z When connecting calibration tubes, make sure that gas flows in the correct
direction, which is from the inspiration connector of the breathing system, through
high flow inlet of the anesthesia machine calibration device, anesthesia machine
calibration device, high flow outlet of the anesthesia machine calibration device,
and to the expiration connector of the breathing system.
z Before calibration, make sure that no sensor or valve related technical alarms
occurred.
z During calibration, make sure that the drive gas pressure is kept above 0.3 MPa.
Failure to do so may lead to calibration failure.
1. Before calibration, perform leak test of the breathing system in mechanical ventilation
mode. Perform calibration after the leak test is passed. For procedures about leak test,
refer to 3.7.2Breathing System Leak Test in Mechanical Ventilation Mode.
2. Remove the folding bag from the bellows and reinstall the bellows housing.
3. Remove the water collection cup beside the sodalime canister assembly in the breathing
system.
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