Mindray WATO EX-55, Service Manual

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Contents
1 Safety ................................................................................................................................. 1-1
1.1 Safety Information .......................................................................................................... 1-1
1.1.1 Dangers .............................................................................................................. 1-2
1.1.2 Warnings............................................................................................................. 1-2
1.1.3 Cautions ............................................................................................................. 1-2
1.1.4 Notes .................................................................................................................. 1-3
1.2 Equipment Symbols ........................................................................................................ 1-3
2 Theory of Operation ........................................................................................................ 2-1
2.1 Pressure Unit Conversion Table...................................................................................... 2-1
2.2 Gas Flow ......................................................................................................................... 2-2
2.2.1 Pneumatic Circuit Diagram................................................................................ 2-2
2.2.2 Parts List ............................................................................................................ 2-3
2.2.3 Key to Symbols .................................................................................................. 2-4
2.2.4 Description ......................................................................................................... 2-4
3 Checkout and Test ............................................................................................................ 3-1
3.1 System Inspection ........................................................................................................... 3-1
3.2 Pipeline Tests .................................................................................................................. 3-2
3.3 Cylinder Tests.................................................................................................................. 3-2
3.3.1 Check the Cylinders are Full.............................................................................. 3-3
3.3.2 Cylinder High Pressure Leak Test...................................................................... 3-3
3.4 Flow Control System Tests ............................................................................................. 3-3
3.4.1 Without O2 Sensor ............................................................................................. 3-3
3.4.2 With O2 Sensor .................................................................................................. 3-5
3.5 Vaporizer Back Pressure Test .......................................................................................... 3-5
3.6 O2 Flush Test .................................................................................................................. 3-6
3.6.1 In Mechanical Ventilation Mode ........................................................................ 3-6
3.6.2 In Manual Ventilation Mode .............................................................................. 3-7
3.7 Breathing Circuit Tests.................................................................................................... 3-7
3.7.1 Bellows Test ....................................................................................................... 3-8
3.7.2 Breathing System Leak Test in Mechanical Ventilation Mode .......................... 3-8
3.7.3 Breathing System Leak Test in Manual Ventilation Mode............................... 3-12
3.7.4 APL Valve Test ................................................................................................. 3-13
3.8 Pressure Relief Valve Test............................................................................................. 3-14
3.9 Alarm Tests.................................................................................................................... 3-15
3.9.1 Prepare for Alarm Tests.................................................................................... 3-15
3.9.2 Test the O
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Concentration Monitoring and Alarms .......................................... 3-16
3.9.3 Test the Low Minute Volume (MV) Alarm ...................................................... 3-16