Mindray WATO EX-55Pro, Service Manual

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1. Leakage test on mechanical ventilation
Perform the leakage test in mechanical ventilation mode according to section 3.7.2
Leakage Test on Breathing System.
2. Leakage test on the breathing system in manual ventilation mode
Required tools:
 Three breathing tubes
 One Y-shape breathing tube
Test procedures:
(1) Enter the standby mode.
(2) Install the breathing circuit properly.
(3) Set Automatic/Manual switch to Manual.
(4) Set the pressure of the APL valve to the maximum.
(5) Block the interfaces on the patient end and the manual airbag arm using three corrugated
pipes and one corrugated pipe T-junction connector, as shown in the following figure.
(6) Enable the O2 flow regulator and set the O2 flow to 0.2 L/min.
(7) Enable the O2 flush and make the reading of the Paw pressure gauge rise to 30 cmH2O.
(8) Stop O2 inflation. If the reading of the Paw pressure gauge decreases below 30 cmH2O,
this test fails.
(9) If the reading of the Paw pressure gauge rapidly increases, disable the O2 flow regulator
in a timely manner to prevent the pressure from exceeding the measurement range of the
Paw pressure gauge. Otherwise, the damaged APL valve may damage the Paw pressure
gauge (in this test, if the O2 flow regulator is disabled due to this reason, the test is
considered as passed).