Mindray WATO EX-55Pro, Service Manual

Page: 314 / 474

8-60
3. Push the pushrod of the syringe to make the pressure reading on the anaesthesia machine
calibration apparatus rise to 70-90 cmH2O. Then, stop pushing. Remain the relative
position between the pushrod and the syringe body unchanged. If the pressure reading of
the anaesthesia machine calibration apparatus decreases no more than 5 cmH2O within
15s, the test item is passed.
If test item I is not passed but test item II is passed, the pressure sampling line of the flow sensor
in the breathing system is damaged. In this case, replace the breathing system. If both test item I
and test item II are not passed, check the internal sampling line and connector of the system and
the sealing part and solenoid valve of the circuit transit block assembly, until test item II is passed.
Then, conduct test item I. If test item I is still not passed, the pressure sampling line of the flow
sensor in the breathing system is damaged. In this case, replace the breathing circuit.
8.4.4.2 Leakage Test on the Low-pressure Airway System
After you confirm that the pressure sampling line of the flow sensor is not leaked, perform the
leakage test on the low-pressure airway system, as shown in Figure a to Figure d.
Figure a System leakage test
1. Leakage test on
the breathing
system in
mechanical
ventilation mode
.
Not pass
Pass
Pass
Pass
Not
pass
1. Leakage test
on the breathing
system in
mechanical
ventilation
mode
Pass
Figure d Leakage test on
the breathing circuit Figure b Manual
ventilation
leakage test
4. Leakage
test on all
pipelines in
the circuit
adapter
Figure c
Leakage
test on the
internal
Re-install the bellow and
soda lime canister (clean
the
entrance
and sealing
washer
of
the canister),
and check the bellow
Completed