Mindray WATO EX-55, Service Manual

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3-8
3.7.1 Bellows Test
1. Set the system to Standby.
2. Set the bag/mechanical ventilation switch to the mechanical ventilation position.
3. Set all flow controls to minimum.
4. Close the breathing circuit by plugging the patient connection.
5. Push the O
2
flush button to fill the bellows, folding bag rising to the top.
6. Make sure that the pressure reading on the airway pressure gauge must not increase to
more than 15 cmH
2
O
7. The folding bag should not fall. If it falls, it indicates that the bellows assembly has a
leak. You need to reinstall the bellows or folding bag.
3.7.2 Breathing System Leak Test in Mechanical Ventilation
Mode
NOTE
z
Perform leak test again each time after servicing the anesthesia machine, replacing
the components, or re-connecting the tubes.
The test aims to check if the pneumatic circuit has leaks in mechanical ventilation mode. Test
items include bellows, drive gas circuit, sodalime canister, patient tubes, flow sensors and
their connectors.
3.7.2.1 Test Procedures
NOTE
z
Breathing circuit leak test must be performed when the system is Standby.
z
Before doing the breathing circuit leak test, make sure that the breathing circuit is
correctly connected and the breathing tubes not damaged.
z
Before doing the breathing system leak test, make sure that the drive gas pressure
is sufficient. During the leak test, make sure that the test procedures are strictly
followed.
z
During the leak test, selecting [Stop] will stop the ongoing leak test. To continue the
test, you must select [Start] to start the leak test again.