mindray a5 anesthezia service_manual

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Service Manual

Anesthesia SystemA N E S T H E S I A S YS T E M

A5_Srv Mnl Cover-046-001142-00.indd 1

3/3/11 12:33 PM

Service Manual

Anesthesia SystemA N E S T H E S I A S YS T E M

A5 is a U.S. trademark of Mindray DS USA, Inc. Selectatec is a registered trademark of Ohmeda.

Copyright Mindray DS USA, Inc., 2010. All rights reserved. Contents of this publication may not be reproduced in any form without permission of Mindray DS USA, Inc

Foreword...................................................................................................................................i Warnings, Cautions, and Notes...............................................................................................i Warnings, Cautions and Notes ...................................................................................................i Warnings ....................................................................................................................................i Cautions ....................................................................................................................................ii Notes .........................................................................................................................................ii 1 Theory of Operation .........................................................................................................1-1 1.1 Introduction......................................................................................................................1-1 1.2 Electrical and Pneumatic Connections.............................................................................1-2 1.2.1 Electrical Connection..........................................................................................1-2 1.2.2 Penumatic connection .........................................................................................1-4 1.2.3 Connections between Pneumatic Circuit, Breathing System and Ventilator Control Board .....................................................................................................................................1-7 1.3 Gas Flow ..........................................................................................................................1-9 1.3.1 Pneumatic Circuit Diagram.................................................................................1-9 1.3.2 Parts List .............................................................................................................1-9 1.3.3 Key to Symbols.................................................................................................1-11 1.3.4 Description........................................................................................................1-11 1.4 Anesthesia System Components ....................................................................................1-24 1.4.1 Auxiliary Outlets...............................................................................................1-24 1.4.2 Work Light Board .............................................................................................1-24 1.5 The Breathing System....................................................................................................1-25 1.5.1 Brief Introduction..............................................................................................1-25 1.5.2 Mechanical Mode, Inspiration ..........................................................................1-26 1.5.3 Mechanical Mode, Expiration...........................................................................1-27 1.5.4 Manual Mode, Inspiration.................................................................................1-28 1.5.5 Manual Mode, Expiration .................................................................................1-29 1.5.6 Pneumatic PEEP ...............................................................................................1-29 1.5.7 Ventilator in Standby.........................................................................................1-29 1.5.8 Breathing System Components.........................................................................1-30 1.6 Ventilator UI...................................................................................................................1-31 1.6.1 Display ..............................................................................................................1-31 1.6.2 CPU Board ........................................................................................................1-36 1.7 Ventilator Control and Drive..........................................................................................1-38 1.7.1 Mother Board ....................................................................................................1-38 1.7.2 Ventilator Control and Drive Board ..................................................................1-47 1.7.3 Battery...............................................................................................................1-54 1.7.4 Breathing System Heater ..................................................................................1-55 1.8 Ventilator Pneumatic- O2 Drive Gas..............................................................................1-55 1.8.1 Ventilator pneumatic drive ................................................................................1-55 1.8.2 Drive Pressure-High pressure regulator (29 psi)...............................................1-55 1.8.3 Drive Gas Assembly .........................................................................................1-55 1.8.4 Tube Color Coding............................................................................................1-55 2 Installation Guide .............................................................................................................2-1 2.1 Delivery of The New Anesthesia Machine ......................................................................2-1 2.2 Assembly..........................................................................................................................2-1 2.2.1 Unpacking ...........................................................................................................2-1 2.2.2 Initial Setup.........................................................................................................2-2 2.2.3 Breathing System and Breathing System Accessories and Checkout Procedures2-3 2.2.4 Tank Wrench and Pre-operation Checklist..........................................................2-4 2.2.5 Vaporizers ...........................................................................................................2-4 2.2.6 Emergency Cylinder(s) .......................................................................................2-6

1

2.2.7 Breathing Circuit, CO2 Absorbent and Liquid Vaporizer Agent.........................2-6 2.2.8 Monitoring Products Mounting and Electrical Connection ................................2-7 2.2.9 Agent Monitor Waste Gas Scavenging................................................................2-7 2.3 Test...................................................................................................................................2-7 3 Periodic Maintenance .......................................................................................................3-9 3.1 Maintenance Schedule .....................................................................................................3-9 3.2 Periodical Maintenance Consumable Parts Kits ..............................................................3-9 3.3 Periodical Maintenance Schedule ....................................................................................3-9 3.4 Visual Inspection Checklist..............................................................................................3-9 3.5 List of Parts inside the Periodical Maintenance Consumable Parts Kits .........................3-9 3.6 Battery Maintenance and Replacement..........................................................................3-13 3.7 Functional Tests .............................................................................................................3-13 3.7.1 Gas Delivery System Tests................................................................................3-13 3.7.2 Breathing System Leak Test..............................................................................3-14 3.7.3 Check the Sensor Zero Point.............................................................................3-19 3.7.4 Check the Flow Sensor Accuracy .....................................................................3-21 3.7.5 Check the Pressure Sensor Accuracy ................................................................3-25 3.8 Pneumatic Leak Tests.....................................................................................................3-28 3.8.1 N2O Cylinder Leak Test ...................................................................................3-28 3.8.2 O2 Cylinder Leak Test ......................................................................................3-28 3.8.3 AIR Cylinder Leak Test ....................................................................................3-28 3.8.4 N2O Line Pressure Leak Test ...........................................................................3-28 3.8.5 O2 Line Pressure Leak Test ..............................................................................3-28 3.8.6 AIR Line Pressure Leak Test.............................................................................3-29 3.9 Breathing System Checks ..............................................................................................3-29 3.9.1 Waste Gas Scavenger Test (if available) ...........................................................3-29 3.9.2 Internal Gas Connections Test ..........................................................................3-29 3.9.3 Drive Gas Pressure Loss Alarm, N2O Cutoff Test............................................3-30 3.10 Performance Verification .............................................................................................3-30 3.10.1 Standby Mode Ventilation Test .......................................................................3-30 3.10.2 Manual Mode Ventilation Test ........................................................................3-30 3.10.3 APNEA Alarm Test .........................................................................................3-30 3.10.4 Alarm Silence Test ..........................................................................................3-31 3.10.5 VCV Adult Ventilation Mode Test ..................................................................3-31 3.10.6 VCV Child Ventilation Mode Test ..................................................................3-32 3.10.7 Airway Disconnect Alarm Test .......................................................................3-32 3.10.8 PCV Adult Ventilation Mode Test...................................................................3-33 3.10.9 Pressure Support (PS) Ventilation Mode Test .................................................3-33 3.11 Alarms and Fail safe Functions ....................................................................................3-34 3.11.1 Set Up..............................................................................................................3-34 3.11.2 Low FiO2 Alarm Test......................................................................................3-34 3.11.3 High FiO2 Alarm Test .....................................................................................3-34 3.11.4 Peak Pressure Alarms Test ..............................................................................3-35 3.11.5 Minute Volume Alarm Test .............................................................................3-35 3.12 Miscellaneous Tests .....................................................................................................3-36 3.12.1 Test the Line Voltage Alarm............................................................................3-36 3.12.2 Top Light and Auxiliary Light Test.................................................................3-36 3.12.3 Auxiliary AC Outlets Test ...............................................................................3-36 3.12.4 A5 Installation Checklist.................................................................................3-36 3.13 Vaporizer Interlock Test ...............................................................................................3-37 3.14 Electrical Tests .............................................................................................................3-37 3.14.1 Convenience AC Outlets Test .........................................................................3-37 3.14.2 Electrical Safety Inspection Test .....................................................................3-37 4 Calibration.........................................................................................................................4-1 4.1 Introduction......................................................................................................................4-1

2

4.2 Calibration Warnings, Precautions, and Notes.................................................................4-1 4.3 System Calibration...........................................................................................................4-2 4.3.1 Flow Calibration (user) .......................................................................................4-3 4.3.2 Flow Calibration (Service)..................................................................................4-7 4.3.3 Pressure Calibration (Service) ..........................................................................4-15 4.3.4 Pressure and Flow Zeroing (Service)................................................................4-21 4.3.5 Electronic Flowmeter Zeroing (user) ................................................................4-23 4.3.6 O2 Sensor Calibration.......................................................................................4-26 4.3.7 ORC Calibration ...............................................................................................4-34 4.4 Zero the Airway Pressure Gauge ...................................................................................4-41 5 Repair and Troubleshooting.............................................................................................5-1 5.1 Troubleshooting Guidelines .............................................................................................5-1 5.1.1 Identify the problem............................................................................................5-1 5.1.2 Avoid shorting component leads together ...........................................................5-1 5.1.3 Use the proper equipment ...................................................................................5-1 5.1.4 Clean up the repair area ......................................................................................5-1 5.2 Technical Alarms Check ..................................................................................................5-1 5.2.1 Startup Alarm Messages......................................................................................5-2 5.2.2 CPU Board Runtime Alarm ................................................................................5-5 5.2.3 Power Board Runtime Alarm..............................................................................5-5 5.2.4 Fresh Flow Sensor Board Alarm.........................................................................5-7 5.2.5 Ventilator Control Board Runtime Alarm ...........................................................5-9 5.3 Pneumatic Circuit System Problems..............................................................................5-12 5.3.1 Tools for on-site Maintenance...........................................................................5-13 5.3.2 Gas Supplies and Drive Gas..............................................................................5-22 5.3.3 Anesthetic Gas Delivery System.......................................................................5-30 5.3.4 Breathing System ..............................................................................................5-43 5.3.5 Tidal Volume .....................................................................................................5-58 5.4 Sensors and Valves Problems.........................................................................................5-60 5.4.1 Correspondence with Pneumatic Circuit Components......................................5-60 5.4.2 Correspondence with Hardware Components...................................................5-61 5.4.3 Preparations before Using Diagnostic Tests......................................................5-61 5.4.4 Zero Points of Flow & Pressure Sensors Problems...........................................5-61 5.4.5 Connections and Measurement of the Flow Sensors Problems ........................5-62 5.4.6 Connections and Measurement of the Pressure Sensors Problems ...................5-63 5.4.7 Opening State of the Inspiratory Valve Problems .............................................5-64 5.4.8 Opening States of the PEEP Safety Valve Problems.........................................5-64 5.4.9 Opening State of the PEEP Valve Problems......................................................5-65 5.5 Hardware and Electrical Problems.................................................................................5-65 5.6 Software Update and Software Configuration Activation..............................................5-67 5.6.1 Introduction.......................................................................................................5-67 5.6.2 System Connection and Setup...........................................................................5-68 5.6.3 Booting Software Upgrade................................................................................5-69 5.6.4 System Software Upgrade.................................................................................5-70 5.6.5 Module Software Upgrade ................................................................................5-71 5.6.6 Multi-package Software Upgrade .....................................................................5-72 5.6.7 Commonly-encountered Problems and Recommended Actions .......................5-73 6 Repair and Disassembly ...................................................................................................6-1 6.1 Prepare for Disassembly ..................................................................................................6-1 6.1.1 Tools....................................................................................................................6-1 6.1.2 Preparations ........................................................................................................6-1 6.1.3 Bleed Gas Pressure .............................................................................................6-2 6.2 Disassemble the Assemblies ............................................................................................6-2 6.2.1 Disassemble the Internal Assemblies of the Machine Upper Half......................6-2 6.2.2 Disassemble Hardware Box ................................................................................6-7

3

6.2.3 Disassemble the Work Surface..........................................................................6-13 6.2.4 Disassemble the Display ...................................................................................6-20 6.2.5 Remove the Panel of Pressure Gauges..............................................................6-26 6.2.6 Remove the Auxiliary Gas Outlet Assembly ....................................................6-29 6.2.7 Remove the Rotating Block of Breathing Circle ..............................................6-29 6.2.8 Remove the AGSS Assembly............................................................................6-30 6.2.9 Disassemble the Base Assembly .......................................................................6-30 6.3 Disassemble the Breathing System ................................................................................6-32 6.3.1 Remove the O2 Sensor and Cable.....................................................................6-32 6.3.2 Remove the Breathing Tubes ............................................................................6-33 6.3.3 Remove the Flow Sensor ..................................................................................6-34 6.3.4 Remove the Manual Bag...................................................................................6-35 6.3.5 Remove the Sodalime Canister .........................................................................6-35 6.3.6 Remove the CO2 Bypass Assembly..................................................................6-35 6.3.7 Remove the drain valve ....................................................................................6-36 6.3.8 Remove the Bypass Valve And the Trigger Board ............................................6-37 6.3.9 Remove the Patient Circle Assembly................................................................6-39 6.3.10 Remove the Bellows Assembly.......................................................................6-39 6.3.11 Remove the Pop-off Valve Assembly..............................................................6-40 6.3.12 Disassemble the Expiratory/Inspiratory Check Valve Assemblies..................6-41 6.3.13 Remove the Water Collection Cup..................................................................6-41 6.3.14 Remove the Airway Pressure Gauge...............................................................6-42 6.3.15 Remove the Bag Arm......................................................................................6-42 6.3.16 Remove the Back Upper Cover and Back Lower Cover Assemblies .............6-43 6.3.17 Remove the Front Upper Cover, Median Plate and Front Lower Cover Assemblies 6-44 6.3.18 Disassemble the Automatic/Manual Ventilation Switch Assembly.................6-45 6.3.19 Remove the APL Valve Assembly ..................................................................6-47 7 Replacement Parts ............................................................................................................7-1 7.1 Introduction......................................................................................................................7-1 7.2 Ordering Replaceable Parts..............................................................................................7-1 7.3 Diagrams and Tables........................................................................................................7-2 7.3.1 A5 Structure ........................................................................................................7-2 7.3.2 A5 Upper Half.....................................................................................................7-4 7.3.3 A5 Hardware Box ...............................................................................................7-5 7.3.4 A5 Work Surface .................................................................................................7-6 7.3.5 A5 Patient Circuit Main Body.............................................................................7-7 7.3.6 A5 Pre-pak Absorber Canister Assembly............................................................7-8 7.3.7 A5 Valve assembly ..............................................................................................7-9 7.3.8 A5 Display Assembly........................................................................................7-10 7.3.9 A5 Display Assembly Main Body.....................................................................7-11 7.3.10 A5 Base Assembly ..........................................................................................7-12 8 Warranty............................................................................................................................8-1 8.1 Warranty Statements ........................................................................................................8-1 8.2 Disclaimers ......................................................................................................................8-2 8.3 Manufacturers Responsibility.........................................................................................8-2 8.4 Phone Numbers and How to Get Assistance....................................................................8-2

4

ForewordThis Service Manual is intended as a guide for technically qualified personnel performing repair and calibration procedures.

Warnings, Cautions, and NotesWarnings, Cautions and NotesPlease read and adhere to all warnings, cautions and notes listed here and in the appropriate areas throughout this manual. A WARNING is provided to alert the user to potential serious outcomes (death, injury, or serious adverse events) to the patient or the user. A CAUTION is provided to alert the user to use special care necessary for the safe and effective use of the device. They may include actions to be taken to avoid effects on patients or users that may not be potentially life threatening or result in serious injury, but about which the user should be aware. Cautions are also provided to alert the user to adverse effects on this device of use or misuse and the care necessary to avoid such effects. A NOTE is provided when additional general information is applicable.

WarningsWARNING: Whenever using anesthetic gases, nitrous oxide, oxygen, or any hospital gas always follow the appropriate agent evacuation/collection procedures. Use the hospital gas evacuation system. WARNING: Use only an approved lubricant on any O-ring in contact with oxygen. Krytox is the recommended oxygen service lubricant. WARNING: For continued protection against fire hazard, replace all fuses with the specified type and rating. WARNING: In order to prevent an electric shock, the machine (protection class I) may only be connected to a correctly grounded mains connection (socket outlet with grounding contact). WARNING: Remove all accessory equipment from the shelf before moving the anesthesia machine over bumps or on any inclined surface. Heavy top loading can cause the machine to tip over causing injury. WARNING: Possible explosion hazard. Do not operate machine near flammable anesthetic agents or other flammable substances. Do not use flammable anesthetic agents (i.e. ether or cyclopropane.) WARNING: The use of anti-static or electrically conductive respiration tubes, when utilizing high frequency electric surgery equipment, may cause burns and is therefore not recommended in any application of this machine. WARNING: Possible electric shock hazard. The machine may only be opened by authorized service personnel. WARNING: Compressed gasses are considered Dangerous Goods/Hazardous Materials per I.A.T.A(International Air Transport Association). and D.O.T.( Department Of Transport) regulations. It is a violation of federal and international law to offer any package or over pack of dangerous goods for transportation without the package being appropriately identified, packed, marked, classified, labeled and documented according to D.O.T. and I.A.T.A. regulations. Please refer to the applicable I.A.T.A. Dangerous Goods Regulations and /or the Code of Federal Regulations 49 (Transportation, Parts 171-180) for further information. i

WARNING: Avoid exposure to respiratory gases by always directing the fresh gas flow from the fresh gas outlet to the waste gas scavenger.

CautionsCAUTION: This device uses high pressure compressed gas. When attaching or disconnecting backup gas cylinders, always turn the cylinder valves slowly. Use the A5 flow meters to bleed down the pressure, watching the cylinder gauge indicate the depleting cylinder pressure, before disconnecting the cylinder from the yoke. Always open and close cylinder valves fully. CAUTION: This device operates using compressed gas at high pressures from the hospital central supply. When connecting gas supply lines attach the hose connection to the machine before connecting the quick disconnect fitting to the hospital source. Disconnect the supply hose from the hospital source connection prior to disconnecting it from the A5 gas connection fittings. CAUTION: Refer to the 3.3Periodical Maintenance Schedule for assistance when performing scheduled periodic maintenance. CAUTION: Do not leave gas cylinder valves open if the pipeline supply is in use and the system master switch is turned to 'ON'. If used simultaneously, cylinder supplies could be depleted, leaving an insufficient reserve supply in the event of pipeline failure. CAUTION: Use cleaning agent sparingly. Excess fluid could enter the machine, causing damage. CAUTION: This machine must only be operated by trained, skilled medical staff. CAUTION: Perform the electrical safety inspection as the last step after completing a repair or after routine maintenance. Perform this inspection with all covers, panels, and screws installed. CAUTION: After changing the CO2 absorbent, carry out a system leak test. CAUTION: Only Selectatec compatible vaporizers with Interlock-System may be used with the A5 unit. CAUTION: After each exchange of a vaporizer, carry out a system Leak test. CAUTION: Do not clean the machine while it is on and/or plugged in. CAUTION: Pressing cancel at any time during the procedure will cancel the session's settings and reload the previously-stored calibration coefficients. CAUTION: Depleted soda lime changes color. Replace the soda lime if approximately 2/3 of the absorber content is discolored. CO2 absorbent can be safely changed without stopping mechanical ventilation.

NotesNOTE: Unauthorized servicing may void the remainder of the warranty. Check with the factory or with a local authorized distributor to determine the warranty status of a particular instrument.

ii

1 Theory of Operation1.1 IntroductionA5 Anesthesia System is a continuous flow inhalation gas anesthesia system that delivers anesthetic vapor, provides for automatic and manual modes of ventilation, and is equipped with a monitoring system for ventilation, inspired and expired gas. A5 is intended for use in operating rooms. It will be used with O2, N2O, and AIR supplied by a medical gas pipeline system or by externally mounted gas cylinders. Anesthetic agent can be delivered via vaporizers mounted on the machine. A5 ventilator offers multiple ventilation modes: Volume Control Ventilation (VCV) which include the Pressure Limit Ventilation (PLV) function, Pressure Control Ventilation (PCV) with/without Volume guarantee (VG) ventilation mode, Synchronized Intermittent Mandatory Ventilation (SIMV) with VCV mode, Synchronized Intermittent Mandatory Ventilation (SIMV) with PCV mode , Pressure Support (PS) ventilation mode and Spontaneous ventilation in Manual mode with APL fully open. Electronic PEEP is available in all ventilation modes. User control over inspiratory flow (SLOPE) is possible in PCV, SIMV and PSV modes. Automatic fresh gas compensation limits the effect on the patient of user changes in fresh gas flow rate. The traditional bellows system is driven by oxygen and makes patient disconnections clearly visible. A5 fresh gas dosing subsystem offers the ease of use and features of a traditional anesthesia system. Dual-flow tubes electronic flowmeter displays the O2, N2O and Air flows at all times. A knob guard prevents inadvertent movement of the flow control knobs. Clearly visible gas supply gauges indicate the gas pipeline supply pressures and gas cylinder pressures. An auxiliary O2 flow meter is conveniently located. The O2 flush button is in the traditional location near the front left corner of the table top. Safety systems within A5 work to prevent hypoxic mixtures from being delivered to the patient. Nitrous oxide will not be delivered unless oxygen pressure is present. A mechanical safety system assures that at least 21% O2 is present when setting mixtures of O2 and N2O. The A5 breathing system is heated to minimize condensation inside the block and to return humid gas to the patient. The breathing system provides easy access to the Airway Pressure Limiting (APL) valve and breathing bag along with easy Viewing of the Airway Pressure gauge (PAW). The APL valve has a comfortable, single turn knob that provides a clear view of the manual breathing pressure setting. The absorber assembly incorporates a cam lock device that is convenient to open and close. CO2 absorbent Pre-paks or loose fill can be used. A water trap that can be drained is also provided on the absorber assembly.

Two flow sensors in the breathing system measure inspired and exhaled gases for control and monitoring. Spirometry is standard. Inspired oxygen is monitored via a fuel-cell type sensor and breathing pressure is also monitored. The breathing system can be swiveled for ease of positioning. A test plug is provided between the two main hose connections to allow for automated leak testing during startup. Connection to the Anesthesia Gas Scavenging System (AGSS) is made from the rear of A5. The power management system of A5 provides AC power for its main system functions while also charging its internal batteries. In the case of an AC power failure, A5 will operate for a minimum of 150 minutes on battery power. A recessed main switch is provided to power the system ON and OFF. The four auxiliary AC outlets provided on the rear of the machine operate independent of the main switch position. 1-1

1.2 Electrical and Pneumatic Connections1.2.1 Electrical ConnectionP3#23 #25 Lout Nout Lout Nout Lin Lout Nout

P4

P5

P6Lout Nout

P1Lin Nin Lout P2 Nout #24

P7

Lin

Nin

P8

Nin

P9Lin

Nin

P10

Lin

Nin

J1

J4:RS-232 J3 J10 J11

B1

B8

J9:Ethernet J8:USB

P11 P12

J1

B2J2

J3

J9 #11 J8Valve Brd J4Valve Brd J2Valve Brd J12(Mon Brd) J7(Mon Brd) (Mon Brd)J6 J5(Mon Brd) J3(Mon Brd) J1(Mon Brd) B9/B10/B11 J4 DB25 #12 #13 P19 #11 #11 #11 #11 #11 #11 #11

P13 P14

#1

J8 J7 J5 Calibrate Interface DB9

J1DB50

P15 S8 B5J1

#3 #4 #9

CON CON CON

#2 #2 #2

J2

B12

#12 #5 #7OR #28 J1 #8 #12 J2 B7 J2 DB50 #12 #12 #12 #22 B15 #26 J2 B13 J3 J1 #21 J13 #12 #12 #12 J5 J3 DB37 #12

CON

#14

P16

#6

CON CON

#15 #16 #16

Switch1 Switch2 Switch3CON

B4 B6

#10 J4 P17DISPLAY

B3

CON

#16

#17 CON #18

P20

CON

#19

Switch4 Switch5

CON CON

#20 #20 P18

#12

J1

B14

1-2

NO. B1 B2 B3 B4 B5 B6 B7 B8 B9-11 B12 B13 B14 B15 P1 P2 P3-6 P7-10 P11-12 P13 P14 P15 P16 P17 P18 P19

description Power board Battery adaptation board and cable Backplane Alarm lamp board Indicator light board Touchscreen control board Display adaptation board CPU Board Ventilator Control Board Sensor adaptation board Top light board Fresh flow sensor board Lighting board for auxiliary gas supply Filter Power 250VAC 10A Panel Mount Breaker 250V 10A Auxiliary Output Socket Breaker 250V 3A Lithium battery 2.25" speaker and cable Fan Touch pad 6549mm 10pinUSB Main body of Drive Gas Assenbly Display Exchange Package Circuit Heater Solenoid valve assembly

P/N 801-0631-00025-00 801-0631-00109-00 801-0631-00108-00 801-0631-00019-00 801-0631-00004-00 801-0631-00018-00 801-0631-00017-00 801-0631-00026-00 801-0631-00027-00 801-0631-00089-00 801-0631-00039-00 801-0631-00040-00 801-0631-00002-00 801-0631-00029-00 801-0631-00030-00 801-0631-00032-00 801-0631-00031-00 022-000008-00 801-0631-00038-00 801-0631-00028-00 801-0631-00052-00 801-0631-00088-00 801-0631-00075-00 801-0631-00069-00 801-0631-00046-00

1-3

Main pneumatic system tube connection diagramPipeline pressure gauges Gas mixer O2 N2O 32 33 74O2 AIR N2O

Cylinder pressure gauges N2O AIR 76 75

77

78 O2 poppet valve Flow sensor

Total flowmeter

O2

AIR

58 Back pressureregulator

46 39 41 40 ORC assembly 28 73 48 N2O pipeline assembly Regulator assembly O2 51 45 54 37 50 System switch 43 44 67 42 56 66 65 81 38 Auxiliary air assembly 64 AIR N2O 49 Needle valve 31 30 29 27

1.2.2 Penumatic connection25 26

N2O cylinder yoke

1-4AIR pipeline assembly 36 47 59 79 O2 pipeline assembly 60 61

Vaporizer manifold O2 flush button

53

Common gas outlet

52 Exhalation valve assembly Gas reservoir

Air cylinder yoke

O2 cylinder yoke

55 69 63

Auxiliary gas outlet 57 Auxiliary O2 assembly

S/N 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65

From Total flowmeter Back pressure regulator N2O flow sensor Air flow sensor O2 flow sensor N2O needle valve Air needle valve ORC assembly ORC assembly N2O cylinder yoke Y1 Air cylinder yoke Y1 Y1 O2 pipeline pressure gauge N2O pipeline pressure gauge Air pipeline pressure gauge O2 regulator Y2 Y2 System switch Y2 Y1 N2O regulator ORC assembly Air regulator Y2 O2 flush button Vaporizer manifold Y1 Exhalation valve assembly Y2 Y2 Gas mixer Y1 O2 cylinder yoke Y1 Y1 Y1 Auxiliary air assembly Auxiliary O2 assembly

To Vaporizer manifold Total flowmeter Gas mixer Gas mixer Gas mixer ORC assembly Air flow sensor N2O flow sensor Y2 Y1 N2O regulator Y1 Air regulator Y1 O2 pipeline assembly N2O pipeline assembly AIR pipeline assembly Y2 System switch O2 flush button O2 needle valve ORC assembly O2 regulator ORC assembly N2O needle valve Y2 Air needle valve Common gas outlet Common gas outlet Air pipeline assembly Gas reservoir Y2 Auxiliary O2 assembly Back pressure regulator O2 pipeline assembly Y1 Y1 N2O pipeline assembly Exhalation valve assembly Y2 Y2 1-5

P/N M6G-020014--M6G-020014--082-000524-00 082-000520-00 082-000522-00 082-000524-00 082-000520-00 082-000524-00 082-000522-00 082-000662-00 082-000662-00 082-000517-00 082-000517-00 082-000521-00 082-000523-00 082-000516-00 082-000518-00 082-000522-00 082-000522-00 082-000522-00 082-000522-00 082-000522-00 082-000521-00 082-000524-00 082-000524-00 082-000520-00 082-000520-00 082-000522-00 M6G-020014--082-000517-00 082-000522-00 082-000522-00 082-000522-00 M6G-020014--082-000521-00 082-000521-00 082-000521-00 082-000662-00 082-000521-00 082-000520-00 082-000522-00

S/N 66 67 69 73 74 75 76 77 78 79 81 Y1 Y2

From Y2 Y2 Y1 O2 needle valve Y2 O2 poppet valve O2 poppet valve Y2 Y2 Y1 Y1 Three-way connector Three-way connector

To Auxiliary gas outlet Auxiliary air assembly Auxiliary gas outlet Y2 Y2 Y2 Y2 O2 poppet valve O2 flow sensor O2 pipeline assembly Y1

P/N M6G-020026--082-000520-00 082-000521-00 082-000522-00 082-000522-00 082-000522-00 082-000522-00 082-000522-00 082-000522-00 082-000521-00 082-000521-00 082-000583-00 082-000582-00

1-6

Gas reservoir Exhalation valve assembly Three way valve

2 7 18Y2

88 6 5

Y2

9

8 4

24 86 23 3 117 15 13 11 16 14 12 10

84 82 80 72Monitor board

1.2.3 Connections between Pneumatic Circuit, Breathing System and Ventilator Control Board

1-7Y1

22

Breathing system connector

Common gas outlet

Hardware box connector

S/N 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 22 23 24 72 80 82 84 86 88 Y1 Y2

From Exhalation gas assembly Exhalation gas assembly Exhalation gas assembly Three way valve Three way valve Three way valve Three way valve Y2 Y2 Hardware box connector Y1 Hardware box connector Y1 Hardware box connector Y1 Hardware box connector Y1 Exhalation gas assembly Gas-out connector of CGO connector Breathing system connector Breathing system connector Hardware box connector Hardware box connector Hardware box connector Hardware box connector Hardware box connector Y2 Two-way connector Three-way connector

To Flow sensor connector Hardware box connector Flow sensor connector Ventilator control board Y2 Ventilator control board Y2 Ventilator control board Ventilator control board Y1 Breathing system connector Y1 Breathing system connector Y1 Breathing system connector Y1 Breathing system connector Gas reservoir Fresh gas Exhalation gas assembly Gas reservoir Ventilator control board Ventilator control board Ventilator control board Ventilator control board Y2 Three way valve

P/N A21-000007--A21-000007--A21-000007--A21-000007--A21-000007--A21-000007--A21-000007--A21-000007--A21-000007--A21-000007--M6G-020046--A21-000007--M6G-020046--A21-000007--M6G-020046--A21-000007--M6G-020046--M6G-020018--082-000519-00 M6G-020039--M6G-020018--A21-000007--A21-000007--A21-000007--A21-000007--A21-000007--A21-000007--M02A-10-25945 M90-100030---

1-8

343 44 52 30 9 12Flow

245 41NO NC

1

O2 P-Line

O2 cylinder42 10 14 46 18 51 15 20 16P

1.3.2 Parts List

1.3 Gas Flow

1.3.1 Pneumatic Circuit Diagram

N2O P-Line11 13 47 54AGSS

17 49 19

48

22 24

1 8 23 58 25 59 58 21 59 58 29 7NC NO

40 33 32 39 33 31O2 Flow Flow Flow

38Flow

1-93 8 23 4 7 26 55 8 23 56 50 6 7Vaporizor

3257 5 27

30

31

2

37 53P Flow

36 34 35

Inspiratory valve

Sodalime canister

Auxiliary air supply

28

4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 59

N2O P-Line Air P-Line Air cylinder Regulator (0.4 MPa) Safety valve Filter Regulator (0.2 MPa) Inpiratory flow valve Flow sensor Mechanical overpressure valve(110 cmH2O) Pop-Off valve PEEP safety valve Pressure switch (140 kPa) Proportional PEEP valve Expiratory valve Pneumatic resistor O2 flush valve Flow restrictor Pressure switch Regulator (0.2 MPa) System switch ORC Electronic flowmeter sensor Double-vaporizer manifold Check valve Pressure relief valve Adjustable restrictor

33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58

Bypass valve O2 sensor Airway pressure gauge Inspiratory flow sensor Patient Expiratory flow sensor Water collection cup Expiratory valve Bag/mechanical ventilation switch Manual bag APL valve High pressure O2 output Bellows assembly Pressure relief valve(10 cmH2O) Negative pressure valve(1 cmH2O Scavenging reservoir and noise eliminator Pressure sensor Float flowmeter Auxiliary O2 supply Negative pressure valve Pressure sensor AGSS (AGSS transfer and receiving system) Check valve Back pressure valve Poppet valve Needle valve

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1.3.3 Key to SymbolsFilter Pressure gauge Gas supply connector Flowmeter Pressure switch Regulator Check valve Pressure relief valve Flow control valve Flow restrictor

1.3.4 Description1.3.4.1 Anesthetic Gas Delivery SystemThe anesthetic gas delivery system is connected to anesthetic gas delivery device (vaporizer), breathing system and anesthetic ventilator and outputs fresh gas. The following figure shows the pneumatic circuit of anesthetic gas delivery system.

1-11

The following picture illustrates how gas supplies are outputted. O2 is divided into four pathways (system switch 24, O2 flush valve 20, auxiliary O2 supply 51 and high pressure O2 output 44 respectively). Air goes to two pathways. One is to needle valve 58 and the other to auxiliary Air supply 3. N2O goes to ORC 25. When system switch 24 is turned on, O2 enters needle valve 58. When O2 flow is greater than 300ml, N2O can enter needle valve 58 through ORC 25. After passing through needle valve 58, pre-set pneumatic resistance 59 controls O2 and N2O proportions and ensures the minimum O2 concentration. To auxiliary Air supply

25. ORC N2O tube

Adjust pneumatic resistance

Needle valve

Air tube 24.System switch O2 tube To auxiliary O2 supply To high pressure O2 output

From O2 flush to CGO

From anesthetic gas delivery device to CGO

29. CGO

20. O2 flush valve

After passing through pneumatic resistance 59, O2 and N2O enter electronic flow sensor26. Air enters electronic flow sensor 26 after passing through needle valve 58 and the electronic flow meter monitors and displays the gas flow. 1-12

56. Back pressure valve

26. Flow sensor

50. Total flowmeter The converged gas goes from float flowmeter 50 to the anesthetic gas delivery device (vaporizer), forming fresh gas after mixed with anesthetic agent. The fresh gas then goes from check valve 28 through the CGO29 assembly to the breathing system. The flushing O2 also enters the breathing system through the CGO29 assembly.

Built-in 28. check valve

Outlet of anesthetic gas delivery device

Inlet of anesthetic gas delivery device

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Gas Supplies8. Safety valve

22. Pressure switch

O2 pipeline supply inlet

Pressure sampling tube for O2 supply gas pressure gauge

The above picture shows the O2 pipeline supply inlet assembly. The anesthesia machines pneumatic circuit starts from the gas supplies, which functions to introduce the external pipeline or cylinder gases into the machine. Since the pressure of external gas is very high and the external gas contains foreign substance, pressure reducing valves, filters and pressure relief valves are available in the supply gas circuit. Also, check valves are equipped in the supply gas circuit to prevent gas from flowing back into the pipeline or cylinder. The anesthesia machine has pipeline and cylinder gas supplies available. Pipeline gas supplies go into the pipeline gas supply inlet assemblies through pipeline connectors 1, 3 and 5 respectively.. The pipeline pressure ranges between 280 and 600 kPa. Cylinder gas supplies go into the system through cylinder connectors 2 ,4 and 6 respectively. The O2 and Air cylinder pressures are 6.9 to 15 MPa, and N2O cylinder pressure is 4.2 to 6 MPa, which are decreased to 400 kPa through regulator 7. Each connector is clearly marked and designed to prevent misconnection. All connectors have filters and check valves. Color coded gauges show the pipeline and cylinder pressures. Pressure relief valve 7 functions to prevent the supply gas pressure from being too high. It releases excess gas when gas pressure exceeds 758 kPa. Each supply gas is outputted after gas pressure is decreased below 200 kPa through regulator 23. Pressure switch 22 monitors the O2 supply pressure. When O2 supply pressure is less than approximately 220 kPa, the ventilator gives the alarm of O2 supply failure.

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System Switch AssemblyO2 go into system switch 24; and flowing into the needle valve. System switch has an electrical outlet which controls the power-on status of the system. When the system switch is turned on, O2 enter the needle valve and the system is powered on simultaneously. The anesthetic ventilator starts to monitor the status of the system. When the system switch is turned off, O2 cannot enter the needle valve and the system is powered off.

Flow Adjust and Control Assembly58. Flow adjustment needle valve

N2O chamber 59. Adjust pneumatic resistance

O2 chamber 59. Adjust pneumatic resistance

Needle valve 58controls the gas flows and ORC25 controls the proportion between O2 and N2O as well to ensure that O2 concentration is controlled not to be less than 21%. Turning needle valve knob counterclockwise increases the flow and clockwise decreases the flow.

1-15

Flow Display AssemblyElectronic flowmeter 26 and float flowmeter 50 constitute the flow display assembly. Gases from the flow adjust and control assembly and mixed gas going through the anesthetic gas delivery device (vaporizer) is outputted. Electronicflowmeter 26 measures and displays the flow of each gas. Float flowmeter 50 displays the total gas flow.

26. Flow sensor

50. Total flowmeter

O2 Flush Button Assembly

The above picture shows the O2 flush button assembly. When O2 flush valve 20 is depressed, O2 rushes into the pneumatic circuit which is cut off when this valve is released. The O2 supply gas at 0.2 MPa after regulated goes through the O2 flush valve, the CGO assembly, and into the breathing system. The O2 flush button assembly is not affected by the system switch. Flushing O2 can be performed as long as O2 supply is normal. The O2 flush valve has a slide valve structure inside which ensures automatic reset each time the valve is depressed and released via the spring.

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Vaporizer Manifold

The above picture shows the vaporizer manifold assembly. The anesthetic gas delivery device (vaporizer) is connected to the anesthetic gas delivery system. The mixed gas of N2O, O2 and Air go into the device and the fresh gas containing these three gases and anesthetic agent is finally outputted to the CGO assembly. Either -vaporizer manifold 27 is integrated with check valve 28 which prevents flushing O2 and fresh gas from flowing back to the vaporizer. Selectatec mounting with interlocking function can prevent the user from turning on two vaporizers simultaneously.

CGO Assembly

The above picture shows the CGO assembly. The CGO assembly includes flow restrictor 21 and pressure relief valve 29. Flushing O2 and fresh gas are mixed enter the CGO. Pressure relief valve 29 at the front restricts the pressure of flushing O2 and also that of the fresh gas not to exceed 37.9 kPa.

Auxiliary O2 and Air Supply AssemblyAuxiliary O2 supply assembly 51 and auxiliary Air supply assembly 30 control flow by needle valve and displayed by a glass tube flowmeter into the patient. The flow range adjusted is from 0 to 15 L/min Turning the flow control counterclockwise increases the flow and clockwise decreases the flow.

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High pressure O2 output assemblyThe high pressure O2 output goes from the gas source directly and provides high pressure O2 for the external ventilation device (jet ventilation devices) without passing through pressure regulator. When no external device is connected, the high pressure O2 output is closed. The maximum flow is greater than 90L/min.

Outputs auxiliary gas supply

Outputs high pressure O2

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1.3.4.2 Anesthetic VentilatorThe anesthetic ventilator provides drive gas for the patient to breathe. O2 from the gas supply inlet assembly enters the anesthetic ventilator and is outputted in three pathways: drive gas entering the breathing system, drive gas discharged through the AGSS outlet and drive gas discharged through the PEEP outlet. The ventilator controls drive gas flow to prevent too high pressure inside the pneumatic circuit from injuring the patient. The following picture shows the gas flow direction and parts concerning the anesthetic ventilator. Pneumaticallycontrolled module

Gas exhaust tube

Input tube of the pneumaticallycontrolled module

Outputs gas discharged through PEEP outlet

Outputs drive gas

The following is the pneumatic circuit diagram of the anesthetic ventilator.45 Breathing System AGSS 15 16 17P

52 9 Drive Gas 10 11 12Flow

13 14 18 46

49

19

Proportional electromagnetic valve 11 controls inlet gas flow. Filter 9 filters drive gas again. Regulator 10 regulates pressure inside the pneumatic circuit. 12 is a flow sensor of differential pressure type which monitors gas flow in the drive gas circuit. Mechanical overpressure valve 13 ensures that the pressure in the drive gas circuit does not exceed safe pressure. It releases excess gas when gas pressure exceeds 11 kPa.. 18 is expiratory valve. During expiration, gas inside the bellows is discharged from this valve.

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The PEEP function is performed through expiratory valve. 15 is low-flow proportional electromagnetic valve. When it opens, gas is bled from pneumatic resistor 19, forming relatively stable pressure in the peep branch. Such pressure is exerted on the membrane of expiratory valve 18 to form PEEP. To prevent too high pressure inside the pneumatic circuit from injuring the patient and damaging the equipment, safety valve 15, which is electromagnetic on-off valve, is placed before the gas pathway of the expiratory valve. 16 is a pressure switch. When drive gas pressure is less than 140 kPa, an alarm is triggered. 49 is a pressure sensor which monitors the pressure at which the expiratory valve is closed. Pressure relief valve 46 ensures the tube pressure after the expiratory valve is less than 10 cmH2O.

1.3.4.3 Breathing SystemThe breathing system provides a closed loop for the anesthetic gas. The expired gas in the patient can be inspired in the inspiration phase to maintain the temperature and humidity conditions of the patients expired gas. During inspiration, the drive gas depresses the bag inside the bellows to force the inside gas to enter the patients lung. During expiration, the patients expired gas goes into the bag inside the bellows. Sodalime canister 34 absorbs CO2 the patient expires. The following figure shows the pneumatic circuit of breathing system.43 45 41NO NC

AGSS

42 Drive Gas 14

40 33 32 39

38Flow

33 31O2

37 53P Flow

36 35

34

Manual and mechanical ventilation modes are selected through the bag/mechanical ventilation switch 41. When manual ventilation is selected, the doctor presses manual bag 42 to supply gas for the breathing system. APL valve 43 is used to adjust the pressure inside the pneumatic circuit in case of manual ventilation. When mechanical ventilation is selected, the ventilator starts to work. It controls the drive gas to depress the folding bag inside bellows 45 and supply gas for the breathing system as per the selected ventilation mode.

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Connected to the anesthesia machine main unit through the circuit adapter, the breathing system is highly integrated. Its tubes are all built in except the tube connected to the patient and the O2 cell cable, as shown below. 41.Bag/mechanical ventilation switch 43.APL valve

Bag arm 40.Expiratory valve 45.Bellows assembly

31. Inspiratory valve 35.Airway pressure gauge

Patient end (built-in inspiratory and expiratory flow sensors)

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Built-in BYPASS valve

32. Sodalime canister

Operating handle

In case of mechanical ventilation, during inspiration, gas flows through bag/mechanical ventilation switch 41, BYPASS valve 33 or sodalime canister 32, inspiratory valve 31, O2 sensor 34, airway pressure gauge 35, and inspiratory flow sensor 36 to the patient. During expiration, gas flows through expiratory flow sensor 38, expiratory valve 40 and bag/mechanical ventilation switch 41 to the folding bag. Airway pressure is monitored by pressure sensor 53. The breathing system is easily disassembled and is autoclavable at 134.

1.3.4.4 Anesthetic Gas Scavenging SystemThe anesthetic gas scavenging system (AGSS) is composed of AGSS transfer system, AGSS receiving system and AGSS disposal system. Waste gas goes from the exhaust port of the anesthesia machine through the AGSS transfer system and the AGSS receiving system and to the hospitals waste gas disposal system (AGSS disposal system), as shown below.

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The following figure shows the operational theory of the AGSS. The throttling holes reduce the effect of negative pressure at the AGSS outlet onto the flow at the entrance. The float helps the user to learn if the disposal system meets the requirement for minimum pump rate. The filter filters foreign substance to prevent the disposal system from being occluded. The gas reservoir is connected to the air through pressure compensation openings. When positive or negative pressure occurs inside the gas reservoir, gas is inputted or outputted to ensure pressure balance inside the system. The AGSS transfer system is a blue tube with 30 mm conical connectors at both ends. The inlet of the transfer system is a female 30 mm conical connector and the outlet a male 30 mm conical connector. The transfer system is connected to the receiving system through the male 30 mm conical connector. The receiving system is connected to the receiving hose through the proprietary connector. The following picture shows the structures of and the connections between the AGSS transfer system, receiving system and disposal system.

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1.4 Anesthesia System Components1.4.1 Auxiliary OutletsAuxiliary Outlet 1 Auxiliary Outlet 2 Auxiliary Outlet 3 Auxiliary Outlet 4

Breaker 1

Breaker 2

Breaker 3

Breaker 4

A5 has four 125V 15A Hospital Grade auxiliary outlets, each of which has one 250V 3A breaker.

1.4.2 Work Light Board1.4.2.1 Top light board

Top light board, top view

Top light board, bottom view The auxiliary Lighting board interfaceJ1 PIN NAME FUNCTION 1 12V The 12V power supply of the auxiliary Lighting board 2 GND Ground 3 GND Ground 4 LIGHT_OUT Auxiliary light control Lighting grade option switch interfaceJ2 PIN NAME FUNCTION 1 HIGH_BRIGHTNESS High brightness grade 2 HIGH_BRIGHTNESS High brightness grade 3 OFF Close light grade 4 OFF Close light grade 5 LOW_BRIGHTNESS Low brightness grade 6 LOW_BRIGHTNESS Low brightness grade

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PIN 1 2 3

Power supply interfaceJ3 NAME 12V GND 12V_AUX

FUNCTION The 12V power supply of the top lighting board Ground The 12V power supply of the auxiliary Lighting board

1.4.2.2 Auxiliary lighting board

Auxiliary lighting boardtop view

Auxiliary lighting boardbottom view Auxiliary lighting board interfaceJ1 PIN NAME FUNCTION 1 12V The 12V power supply of the auxiliary Lighting board 2 GND Ground 3 GND Ground 4 LIGHT_IN Auxiliary light control signal

1.5 The Breathing System1.5.1 Brief IntroductionA5 s breathing System supports three types of operational modes: mechanical ventilation, manual ventilation, and standby, allowing the anesthetist to apply proper ventilation strategy based on the patients needs. The types of flow paths though the breathing system vary with the operating mode or status.

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1.5.2 Mechanical Mode, InspirationThe Auto/Manual is switched to Autoand it closes the manual ventilation path. Drive gas pushes down on the bellows. Gas flows from the bellows, through the CO2 absorber, and through the inspiratory check valve to the patient. During inspiration, fresh gas flows into the inspiratory limb, upstream of the inspiratory check valve. In volume mode, tidal volume compensates for variations in gas flow, to ensure that the set tidal volume meets that delivered to the patient. In pressure mode, the inspiratory pressure is regulated both in gas flow and airway pressure, to ensure the airway pressure held at the set inspiratory pressure during the patient inspiration.APL Valve Auto/Manu Switch

Bellows

NO NC

Breathing Bag

Drive Gas

Pop-Off valve

Exhaust valveAGSS

Exp. ValveExp. Flow SensorWater trap cup

Absorber Canister

Insp. ValveFresh Gas O2 Cell

Insp. Flow Sensor

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1.5.3 Mechanical Mode, ExpirationThe Auto/Manual is switched to Autoand it closes the manual ventilation path. Drive-gas flow stops and the exhaust valve opens. Exhaled gas flows from the patient, through expiratory check valve and into the bellows. Residual drive gas flows out of the bellows dome through the exhaust valve to the scavenging system (AGSS). If PEEP is selected, static pressure on the pilot port of the exhaust valve sets the PEEP level. During exhalation, fresh gas flows backwards through the CO2 absorber into the expiratory limb, downstream of the expiratory check valve.APL Valve Auto/Manu Switch

Bellows

NO NC

Breathing Bag

Drive Gas

Pop-Off valve

Exhaust valveAGSS

Exp. ValveExp. Flow SensorWater trap cup

Absorber Canister

Insp. ValveFresh Gas O2 Cell

Insp. Flow Sensor

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1.5.4 Manual Mode, InspirationThe Auto/Manual is switched to Bagand it closes the Auto ventilation path. Gas flows from the breathing bag when compressed, through the CO2 absorber, into the breathing circuit, and through the inspiratory check valve to the patient. During inspiration, fresh gas flows from the machine into the inspiratory limb, upstream of the inspiratory check valve. Airway pressure exceeding the set value of the APL Valve, the residual gas will pass through the APL Valve to the scavenging system (AGSS).APL Valve Auto/Manu Switch

Bellows

NO NC

Breathing Bag

Pop-Off valve

Exhaust valveAGSS

Exp. ValveExp. Flow SensorWater trap cup

Absorber Canister

Insp. ValveFresh Gas O2 Cell

Insp. Flow Sensor

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1.5.5 Manual Mode, ExpirationThe Auto/Manual is switched to Bagand it closes the Auto ventilation path. Gas flows from the patient, through the expiratory check valve, and into the breathing bag. During exhalation, fresh gas enters the Breathing System. Residual fresh gas passes through the APL valve.APL Valve Auto/Manu Switch

Bellows

NO NC

Breathing Bag

Pop-Off valve

Exhaust valve

AGSS

Exp. ValveExp. Flow SensorWater trap cup

Absorber Canister

Insp. ValveFresh Gas O2 Cell

Insp. Flow Sensor

1.5.6 Pneumatic PEEPThe PEEP valve regulates the pressure at which the exhaust valve opens, therefore, if PEEP is selected, static pressure on the pilot port of the exhalation valve sets the PEEP level, during the mechanical ventilation.

1.5.7 Ventilator in StandbyWhen the A5 is in the standby mode, monitoring will be inactive, and mechanical ventilation is unavailable. The patient should not be ventilated when the system is in standby mode.

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1.5.8 Breathing System Components1.5.8.1 Ventilation Bellows SystemThe ventilator's driving system is a flow generator. Driving gas fills the bellows dome to compress the bellows. The breathing gas is pressed out of the bellows into the patient breathing circuit. The bellows is refilled with fresh gas and the expired gas from the patient.

1.5.8.2 Manual Breathing BagIn manual mode, this device acts as a normal breathing bag, enabling the user to ventilate the patient manually.

1.5.8.3 CO2 AbsorberThe soda lime inside the absorber absorbs the carbon dioxide from the exhaled gas. The A5 accommodates standard sized Pre-paks or loose-fill CO2 absorbent.

1.5.8.4 Inspiratory and Expiratory ValvesTo ensure correct gas flow direction to and from the patient, check-valves are integrated in the inspiratory and expiratory limb of the Breathing System.

1.5.8.5 APL (Airway Pressure Limiting) valveIn manual mode, the APL Valve acts as a normal spring loaded pressure relief valve, limiting the maximum pressure in the Breathing System.

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1.6 Ventilator UI1.6.1 Display1.6.1.1 Display adaptation board

Display adaptation board, top view

Display adaptation board, bottom viewPIN 1 2 3 4 5 6

Inverter interfaceJ1 NAME 12V 12V GND GND LCD_EN LCD_BR

FUNCTION Inverter 12V power supply Inverter 12V power supply Ground Ground LCD Backlight Enable LCD Backlight Brightness Control

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PIN 1 2 3 4 5 6

Alarm lamp board interfaceJ2 NAME 12V GND SDA_CPU SCL_CPU 3_3V GND

FUNCTION Alarm lamp board 12V power supply Ground CPU board I2C data signal CPU board I2C clock signal 3.3V power supply Ground

PIN 1 2 3 4

Touch screen controller interfaceJ4 NAME Function 5V 5V power supply RXD_TOUCH_PANEL Touch screen board serial port receive signal TXD_TOUCH_PANEL Touch screen board serial port transmit signal GND Ground

Display control signal interfaceJ5 PIN Name Function 1 LCD_EN LCD backlight enable 2 LCD_BR LCD backlight brightness control 3 RXD_TOUCH_PANEL Touch screen board serial port receive signal 4 TXD_TOUCH_PANEL Touch screen board serial port transmit signal 5 GND Ground 6 LED_AC AC indicator light drive signal 7 LED_BAT Battery indicator light drive signal 8 SDA_CPU CPU board I2C signal 9 SCL_CPU CPU board I2C signal 10 RSVD Reserved 11 RSVD Reserved 12 RSVD Reserved 13 RSVD Reserved 14 RSVD Reserved 15 RSVD Reserved 16 12V 12V power supply 17 12V 12V power supply 18 GND Ground 19 GND Ground 20 GND Ground

1-32

1.6.1.2 Alarm lamp board

Alarm lamp boardtop view

Alarm lamp boardbottom view Alarm lamp board interfaceJ1 PIN NAME FUNCTION 1 12V 12V power supply 2 GND Ground 3 MAIN_BRD_SDA CPU board I2C data signal 4 MAIN_BRD_SCL CPU board I2C clock signal 5 3_3V 3.3V power supply

1.6.1.3 DisplayA5 display is 15 inch 24 bit 1024x768 LVDS touch screen, which LCD backlight brightness can adjust by the inverter.

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1.6.1.4 Fresh flow sensor board

Fresh flow sensor boardtop view

Fresh flow sensor boardbottom view Fresh flow sensor board interfaceJ1 PIN NAME FUNCTION 1 TXD_FLOW_BRD Fresh flow sensor board serial port transmit signal 2 RXD_FLOW_BRD Fresh flow sensor board serial port receive signal 3 GND Ground 4 12V Fresh flow sensor board 12V power supply

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1.6.1.5 Indicator Board

Indicator Board, top view

Indicator Board, bottom view Indicator Board interfaceJ1 PIN NAME FUNCTION 1 LED_AC AC indicator light drive signal 2 LED_BAT Battery indicator light drive signal 3 GND Ground

1-35

1.6.2 CPU Board

CPU Board , top view

CPU Board, bottom view

1-36

PIN 1 2 3 4 5 6 7 8

Network port, J9 NAME TX+ TXRX+ CT1 CT1 RXCT2 CT2

FUNCTION Positive end of transmit signal Negative end of transmit signal Positive end of receive signal No definition No definition Negative end of receive signal No definition No definition

USB interface, J8 PIN NAME 1 VCC 2 DM0 3 DP0 4 GND 5 VCC 6 DM1 7 DP1 8 GND RS-232 interface, J4 NAME NC RXD TXD NC GND NC NC NC NC

FUNCTION USB power supply USB data signal (negative) USB data signal +(positive) Ground USB power supply USB data signal (negative) USB data signal +(positive) Ground

PIN 1 2 3 4 5 6 7 8 9

FUNCTION No connection RS-232 receive signal RS-232 transmit signal No connection Ground No connection No connection No connection No connection

1-37

1.7 Ventilator Control and Drive1.7.1 Mother Board

Mother Board, top view

Motherboard , bottom view

1-38

VCM interfaceJ1 PIN NAME 1 SAFE_VALVE 2 7VIN 3 INSP_VALVE 4 7VIN 5 PEEP_VALVE 6 SOLENOID_VALVE1 7 SOLENOID_VALVE2 8 SOLENOID_VALVE3 9 SOLENOID_VALVE4 10 PNEUM_PRES_SW 11 NC 12 NC 13 O2_PRE_SW 14 MANU_AUTO_SW 15 GND 16 CO2_BYPASS_SW 17 O2+ 18 O219 TXD_AUX_BRD 20 RXD_AUX_BRD 21 GND 22 RSVD 23 RSVD 24 RSVD 25 VF 26 GND 27 TXD_MON_BRD 28 RXD_MON_BRD 29 12V 30 GND 31 5V 32 5V 33 TXD_CALIBRATE 34 RXD_CALIBRATE 35 GND 36 12V

FUNCTION Safety valve drive signal Inspiration valve drive signal Inspiration valve drive signal PEEP valve drive signal PEEP valve drive signal Three-way valve 1 Three-way valve 2 Three-way valve 3 Three-way valve 4 Pneumatic block pressure switch signal No connection No connection O2 pressure switch signal at gas supply inlet Auto/Manual switch signal Ground Circuit CO2 absorber canister signal O2 concentration signal O2 concentration signal VPM serial port transmit signal VPM serial port receive signal Ground Reserved Reserved Reserved Differential pressure sensor flow signal Ground VCM serial port transmit signal VCM serial port receive signal 12V power supply Ground VCM close safety valve signal 5V power supply Calibration serial port transmit signal Calibration serial port receive signal Ground 12V power supply

1-39

Pneumatic assembly interfaceJ2 PIN NAME FUNCTION 1 7Vout Safety valve power supply 2 SAFE_VALVE Safety valve drive signal 3 7Vout Inspiration valve power supply 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 INSP_VALVE 7Vout PEEP_VALVE 12V SOLENOID_VALVE1 12V SOLENOID_VALVE2 12V SOLENOID_VALVE3 12V SOLENOID_VALVE4 RSVD RSVD RSVD VF 12V GND NC NC NC GND O2_PRE_SW GND PNEUM_PRES_SW GND MANU_AUTO_SW GND CO2_BYPASS_SW GND NC GND O2+ O2LOOP_SW GND NTC_R11 NTC_R12 NTC_R21 NTC_R22 HEA_PWR_15V HEA_PWR_15V GND GND 12V GND RXD_FLOW_BRD TXD_FLOW_BRD Inspiration valve drive signal PEEP valve power supply PEEP valve drive signal Three-way valve power supply Three-way valve drive signal 1 Three-way valve power supply Three-way valve drive signal 2 Three-way valve power supply Three-way valve drive signal 3 Three-way valve power supply Three-way valve drive signal 4 Reserved Reserved Reserved Thermal mass sensor flow sensor Sensor board 12V power supply Ground No connection No connection No connection Ground O2 pressure switch signal at gas supply inlet Ground Pneumatic block pressure switch signal Ground Auto/Manual switch signal Ground Circuit CO2 absorber canister signal Ground No connection Ground O2 concentration signal Ground Circuit switch Ground Signal of thermistor 1 Signal of thermistor 2 Signal of thermistor 1 Signal of thermistor 2 Heater drive voltage signal Heater drive voltage signal Ground Ground Electronic flowmeter power supply Ground Electronic flowmeter serial port receive signal Electronic flowmeter serial port transmit signal

1-40

Display interfaceJ3 PIN NAME 1 LCD_EN 2 LCD_BR 3 RXD_TOUCH_PANEL 4 TXD_TOUCH_PANEL 5 NC 6 LED_AC 7 LED_BAT 8 MAIN_BRD_SDA 9 MAIN_BRD_SCL 10 NC 11 NC 12 NC 13 NC 14 NC 15 NC 16 12V 17 GND 18 GND 19 VCC_LCD 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 VCC_LCD GND GND LVDS_DATA0+ LVDS_DATA0GND LVDS_DATA1+ LVDS_DATA1GND LVDS_DATA2+ LVDS_DATA2GND LVDS_DATA3+ LVDS_DATA3GND LVDS_CLK+ LVDS_CLKGND

FUNCTION Inverter enable signal Inverter brightness adjustment signal Touch screen control board serial port receive signal Touch screen control board serial port transmit signal No connection AC indicator light drive signal Battery indicator light drive signal CPU board I2C signal CPU board I2C signal No connection No connection No connection No connection No connection No connection 12V power supply Ground Ground Optional backplane power supply or CPU board power supply for display Optional backplane power supply or CPU board power supply for display Ground Ground LVDS data difference to positive signal 0 LVDS data difference to negative signal 0 Ground LVDS data difference to positive signal 1 LVDS data difference to negative signal 1 Ground LVDS data difference to positive signal 2 LVDS data difference to negative signal 2 Ground LVDS data difference to positive signal 3 LVDS data difference to negative signal 3 Ground LVDS clock difference to positive signal LVDS clock difference to negative signal Ground

Infrared module rack interface for patient monitorJ4 PIN NAME FUNCTION 1 LED_AC AC indicator light drive signal 2 3V3 3.3V power supply 3 12V 12V power supply 4 12V 12V power supply 5 GND Ground 6 GND Ground 7 NC No connection 8 NC No connection 9 12V 12V power supply 1-41

10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25

RSVD RSVD GND LED_BAT PCON-_NON GND PCON+ PCONTOUCHPAD_5V TOUCHPAD_GND TOUCHPAD_USB+ TOUCHPAD_USB12V GND NC NC

Reserved Reserved Ground Battery indicator light drive signal Power on/off inverse phase signal Ground Power on/off circuit 3.3V Power on/off signal 5V power supply Ground TOUCHPAD_USB difference to positive signal TOUCHPAD_USB difference to negative signal 12V power supply Ground No connection No connection

Calibration interfaceJ5 PIN NAME 1 NC 2 NC 3 NC 4 NC 5 NC 6 12V 7 RXD_CALIBRATE 8 TXD_CALIBRATE 9 GND

FUNCTION No connection No connection No connection No connection No connection 12V power supply Calibration serial port receive signal Calibration serial port transmit signal Ground

Anesthetic ventilator cooling fan interfaceJ7 PIN NAME FUNCTION 1 12V3 12V power supply 2 RSVD Reserved 3 FAN1_STATE Fan status signal 4 GND Ground Speaker interfaceJ8 PIN NAME FUNCTION 1 Speak+ Speaker positive end 2 SpeakSpeaker negative end Battery adaptation board interfaceJ9 PIN NAME FUNCTION 1 BAT1+ Battery voltage 2 NTC1 Battery internal thermistor 3 BC1 Battery in-position signal 4 GND Ground 5 BAT2+ Battery voltage 6 NTC2 Battery internal thermistor 7 BC2 Battery in-position signal 8 GND Ground

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Power board interfaceJ10 PIN NAME 1 PLAM 2 RXD_PWR_BRD 3 LOOP_SW 4 TXD_PWR_BRD 5 NC 6 GND 7 LED-BAT 8 LCD_EN 9 LED-AC 10 LCD_BR 11 PCON-

12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47

3.3VBF BAT2+ GND BC2F NTC2 BAT1+ GND BC1F NTC1 GND GND HEA_PWR_15V HEA_PWR_15V NTC_R12 NTC_R22 NTC_R11 NTC_R21 GND GND 3V3 3V3 5V GND GND GND NC GND NC NC GND GND 12V GND 12V 12V NC

FUNCTION Buzzer drive signal, drive the buzzer directly Power board serial port receive signal Circuit switch, reflect if the circuit is in position Power board serial port transmit signal Power board cooling fan drive Ground Battery status indicator light drive output Backlight enable signal AC status indicator light drive output Backlight brightness control voltage Power on/off signal, LVTTL pulse signal. When this signal is of high level, the system is turned on; when this signal is of low level, the system is turned off. 3.3V only used for power on/off the machine 2 battery input, connect to battery positive end Ground 2 battery availability signal, low level indicates battery available and high level indicates battery unavailable 2 lithium battery internal thermistor signal 1 battery input, connect to battery positive end Ground 1 battery availability signal, low level indicates battery available and high level indicates battery unavailable 1 lithium battery internal thermistor signal Ground Ground Heat wire drive voltage output Heat wire drive voltage output Thermistor (for controlling heat wire) pin 1 Thermistor (for controlling heat wire) pin 2 Thermistor (for controlling heat wire) pin 1 Thermistor (for controlling heat wire) pin 2 Ground Ground 3.3V supply voltage output 3.3V supply voltage output 5V supply voltage output Ground Ground Ground No Connection Ground No Connection No Connection Ground Ground 12V power supply output Ground 12V power supply output 12V power supply output No Connection

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PIN 48 49 50

NAME 15V2 NC 15V2

FUNCTION 15.2V supply voltage output No Connection 15.2V supply voltage output

CPU board interfaceJ11 PIN NAME A1 LCD_VDD A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31 A32 B1 B2 B3 B4 GND NC NC RSVD RSVD GND RSVD RSVD GND UIVCC_USB TOUCHPAD_USB+ TOUCHPAD_USBGND SCL SDA GND NC NC NC NC FAN1_STATE NC GND 3V3 3V3 GND GND 5V 5V GND GND NC NC NC SPK_OUT+

FUNCTION LCD power supply

LCD ground No connection No connection Serial port transmit signal Serial port receive signal Ground Serial port transmit signal Serial port receive signal Ground USB power supply TOUCHPAD_USB data signal+ TOUCHPAD_USB data signalGround CPU board I2C clock CPU board I2C data Ground No connection No connection No connection No connection Fan Status detected signal No connection Ground CPU board main power supply CPU board main power supply Ground Ground CPU board interface chip power supply CPU board interface chip power supply Ground Ground not connected not connected not connected Speaker drive signal+ 1-44

PIN B5

NAME

SPK_OUTGND NC NC NC NC NC GND TXD_PWR_BRD RXD_PWR_BRD GND TXD_FLOW_BRD RXD_FLOW_BRD GND TXD_TOUCH_PANEL RXD_TOUCH_PANEL RSVD RSVD GND NC NC NC GND NC NC NC NC NC GND LVDS-TO0+ LVDS-TO0GND LVDS-TO1+ LVDS-TO1GND LVDS-TO2+ LVDS-TO2GND LVDS-TO3+ LVDS-TO3GND

FUNCTION Speaker drive signal-

B6 B7 B8 B9 B10 B11 B12 B13 B14 B15 B16 B17 B18 B19 B20 B21 B22 B23 B24 B25 B26 B27 B28 B29 B30 B31 B32 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13

Ground No connection No connection No connection No connection No connection Ground Power board serial port transmit signal Power board serial port receive signal Ground Fresh flow sensor board serial port transmit signal Fresh flow sensor board serial port receive signal Ground Touch screen controller serial port transmit signal Touch screen controller serial port receive signal Reserved Reserved Ground No connection No connection No connection Ground No connection No connection No connection No connection No connection Ground LVDS data signal LVDS data signal Ground LVDS data signal LVDS data signal Ground LVDS data signal LVDS data signal Ground LVDS data signal LVDS data signal Ground 1-45

PIN C14

NAME

LVDS-TOC+ LVDS-TOCGND TXD_MON_BRD RXD_MON_BRD GND TXD_AUX_BRD RXD_AUX_BRD GND NC NC GND TP_PWR_CTRL RSVD RSVD RSVD RSVD NC NC

FUNCTION LVDS clock signal

C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32

LVDS clock signal Ground Ventilator control board serial port transmit signal Ventilator control board serial port receive signal Ground Auxiliary ventilator control board serial port transmit signal Auxiliary ventilator control board serial port receive signal Ground No connection No connection Ground TouchPad power supply control signal Reserved Reserved Reserved Reserved No connection No connection

Debugging power on/off interfaceJ12 PIN NAME FUNCTION 1 PCON+ Power on/off signal 2 PCONPower on/off signal Test point definition DESIGNATOR NAME T1 BAT1 T2 T3 T4 BAT2 LED_BAT TXD_7024

FUNCTION Lithium battery voltage 1

RANGE (Unit: V)

Fully charged 12.65% Fully charged 12.65% With battery: 2.5~3.5; Without battery: 0~0.4 High level 2.4~5; Low level 0~0.4 High level 2.4~5; Low level 0~0.4 High level 2.4~5; Low level 0~0.4 High level 2.4~5; Low level 0~0.4 High level 2.4~5; Low level 0~0.4 High level 2.4~5; Low level 0~0.4

T5 T6

TXD_TOUCH RXD_7024

T7 T8 T9

RXD_TOUCH TXD_33209 TXD_FLOW

Lithium battery voltage 2 Battery indicator light drive signal Auxiliary ventilator control board serial port transmit signal Touch screen controller serial port transmit signal Auxiliary ventilator control board serial port receive signal Touch screen controller serial port receive signal VPM serial port transmit signal Fresh flow sensor board serial port transmit signal

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DESIGNATOR T10

NAME RXD_33209

T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 T23 T24 T25

RXD_FLOW TXD_POWER RXD_POWER 5V 3.3V 15V2 12V P15V LED_AC 12V1 12V2 12V3 7V LCD_EN LCD_BR

FUNCTION VPM serial port receive signal Fresh flow sensor board serial port receive signal Power board serial port transmit signal Power board serial port receive signal 5V power supply 3.3V power supply 15.2V power supply 12V power supply Heater power supply AC indicator light drive signal 12V power supply 12V power supply 12V power supply 7V power supply LCD backlight enable signal

LCD backlight brightness adjustment signal

RANGE (Unit: V) High level 2.4~5; Low level 0~0.4 High level 2.4~5; Low level 0~0.4 High level 2.4~5; Low level 0~0.4 High level 2.4~5; Low level 0~0.4 4.75~5.25 3.135~3.465 14.44~15.96 11.4~12.6 0~15 With AC: 5~3.5; Without AC: 0~0.4 11.4~12.6 11.4~12.6 11.4~12.6 6.65~7.35 High level 3.145~3.465; Low level 0~0.3 Brightest 0~1.5; least bright 4.75~5.25

1.7.2 Ventilator Control and Drive BoardThe monitor subsystem performs pressure and flow detection of A5 anesthetic ventilator and anesthetic breathing system, valve control, status monitoring collection, O2 concentration reading, accurate monitoring of pressure and flow inside the circuit, and accurate control of tidal volume. The monitor subsystem is composed of four boards, which are monitor signal detection board, valve drive board, ventilator sensor interface board, and VPM (auxiliary ventilator control board).

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1.7.2.1 Monitor signal detection board

Monitor signal detection board, top view

Monitor signal detection board, bottom view

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Monitor signal detection board communication interface, J1 PIN NAME FUNCTION 1 TXD Serial port transmit 2 3 4 5 6 7 8 RXD 12V GND GND 12V PRST 5V Serial port receive 12V power supply Ground Ground 12V power supply Safety valve control signal 5V power supply

Ventilator sensor interface, J3 PIN NAME 1 SDA 2 SCL 3 VT 4 VF 5 12V 6 GND

FUNCTION I2C data signal I2C clock signal Thermal mass flow sensor temperature signal Thermal mass flow sensor flow signal Sensor power supply Ground

VT calibration communication interface, J7 PIN NAME FUNCTION 1 TXD_CALIBRATE Calibration serial port transmit signal 2 3 4 RXD_CALIBRATE GND 12V Calibration serial port receive signal Ground 12V power supply

Three-way valve control interface, J6 PIN NAME FUNCTION 1 12V Three-way valve power supply 2 3 4 5 6 7 8 SOLENOID_VALVE1 12V SOLENOID_VALVE2 12V SOLENOID_VALVE3 12V SOLENOID_VALVE4 Three-way valve control 1 Three-way valve power supply Three-way valve control 2 Three-way valve power supply Three-way valve control 3 Three-way valve power supply Three-way valve control 4

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VPM communication interface, J5 PIN NAME FUNCTION 1 TXD_AUX_BRD VPM serial port transmit signal 2 3 4 RXD_AUX_BRD GND 12V VPM serial port receive signal Ground 12V power supply

O2 cell detection interface, J12 PIN NAME 1 O2+ 2 3 O2GND

FUNCTION O2 cell+

O2 cellGround

Test point definition DESIGNATOR NAME T1 T2 T3 T6 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17 T18 T19 T20 T21 T22 T23 T24 T25 T26 T27 T28 T29 O2 PP PW FM FE VAJF3 10V5 REF_4V 1V2 VADJ_P FI VADJ_FI TXD1 RXD1 TXD2 RXD2 VD DVDD AVCC WDI RST CLK SAN1 SAN2 SAN3 SAN4

FUNCTION

O2 concentration voltage PEEP pressure Airway pressure Ventilator flow detection Expiratory flow value Offset voltage 10.5V 4.096V baseline power supply 1.2V baseline power supply Offset voltage Inspiratory flow value Offset voltage Serial port transmit signal (to cpu board) Serial port receive signal (from cpu board) Serial port transmit signal (for calibration) Serial port receive signal (for calibration) 7V 3.3V digital voltage 5V analog voltage Watchdog signal Reset signal Clock signal Signal of three-way valve 1 Signal of three-way valve 2 Signal of three-way valve 3 Signal of three-way valve 4

RANGE (unit: V) 0~3.5 0.2~4.5 0.2~4.5 0.21~5.25 0.2~5.5 0.602~0.622 10.25~10.75 3.096~4.196 1.1~1.3 0.602~0.622 0.2~5.5 0.602~0.622 0~3.3 0~5 0~3.3 0~5 6.8~7.6 3.15~3.45 4.75~5.25 0~3.3 0~3.3 0~3.3 0~12 0~12 0~12 0~12

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1.7.2.2 Valve drive board

Valve drive board, top view

Valve drive board, bottom view

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Proportional valve and safety valve drive interface, J4 PIN NAME FUNCTION 1 7V Safety valve power supply 2 SAFE_VALVE Safety valve control signal 3 7V Inspiration valve power supply 4 INSP_VALVE Inspiration valve control signal 5 7V PEEP valve power supply 6 PEEP_VALVE PEEP valve control signal Power supply interface, J2 PIN NAME 1 GND 2 GND 3 12V

FUNCTION Ground Ground 12V power supply

Status monitor detection interface, J8 PIN NAME FUNCTION 1 GND Ground 2 PNEUM_PRE_SW Circuit block pressure switch signal 3 GND Ground 4 NC / 5 GND Ground 6 QUICK_O2_SW O2 flushing pressure switch signal 7 GND Ground 8 CGO_PRE_SW CGO switch signal 9 GND Ground 10 O2_PRE_SW O2 pressure switch signal at gas supply inlet 11 GND Ground 12 MANU_AUTO_SW Auto/Manual switch signal Test point definition DESIGNATOR NAME T1 K_OUT1 T2 K_OUT2 T3 SAFE T4 VOC T5 AD2 T6 FLOW T7 PEEP T8 10V T9 7V T10 SGND

FUNCTION Status monitor signal Status monitor signal Safety valve signal Reserved DA output signal Analog channel output signal Inspiration valve control signal PEEP valve control signal 12V input signal Valve power supply Ground

RANGE(unit: V) 0~3.45 0~3.45 0~7 0~1.2 0~5 0~7 0~7 10~14 6.65~7.35 0

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1.7.2.3 Ventilator sensor adaptation board

Ventilator sensor adaptation board, top view

Ventilator sensor adaptation board, bottom view Ventilator sensor interface, J2 PIN NAME FUNCTION 1 MON_BRD_SDA VCM I2C data signal 2 MON_BRD_SCL VCM I2C clock signal 3 VT Thermal mass flow sensor temperature signal 4 VF Thermal mass flow sensor flow signal 5 12V 12V power supply 6 GND Ground

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Test point definition PIN NAME TP1 3V3 TP2 5V TP3 5VA

FUNCTION Test 3.3V power supply Test 5V power supply Test analog 5V power supply

1.7.3 Battery1.7.3.1 Battery PowerBattery: 11.1V, 4.5Ah2V Lithium battery (sealed) Battery run time: 150 minutes(new battery) Battery charge time: 8 hours max from an initial charge of 10%

1.7.3.2 Battery adaptation board

Battery adaptation board, top view

Battery adaptation board, bottom view Battery interface, J1 and J2 PIN NAME FUNCTION 1 BAT+ Battery+ 2 BAT+ Battery+ 3 BC Battery in-position signal 4 BATBattery5 NTC Temperature signal 6 BATBattery7 BATBattery-

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Battery cable interface, J3 PIN NAME 1 VBAT1 2 NTC1 3 BC1 4 GND 5 VBAT2 6 NTC2 7 BC2 8 GND

FUNCTION Battery voltage Battery internal thermistor Battery in-position signal Ground Battery voltage Battery internal thermistor Battery in-position signal Ground

1.7.4 Breathing System HeaterThe A5 heater provides software and hardware dual-protection of overtemperature. The heater can switch over its operating mode automatically according to the change in ambient temperature.

1.8 Ventilator Pneumatic- O2 Drive Gas1.8.1 Ventilator pneumatic driveOxygen is the driving gas for the ventilator. In addition to the flowmeter block, a high pressure regulator reduces the supply pressure to 29 psi (200 kPa). This pressure represents the drive gas for the ventilator. The drive pressure regulator is placed ahead of the proportional valve that generates the driving gas flow during the inspiratory phase. This flow fills the bellows dome that surrounds the bellows.

1.8.2 Drive Pressure-High pressure regulator (29 psi)The drive pressure regulator stabilizes the supply pressure provided to the proportional valve. The flow generated by the proportional valve is therefore independent of pressure variations at the supply. Setting the drive pressure regulator at 29 psi allows for a maximum inspiratory flow of 110 L/min at the ventilator

1.8.3 Drive Gas AssemblyThe manifold assembly module mainly consists of the inspiratory circuit and peep circuit The inspiratory circuit goes through the normally closed proportional solenoid valve which generates a gas flow of 0 to 110L/min by the valve drive board. The gas flow of the peep circuit normally closed the proportional solenoid valve which also generates a gas pressure of 3 to 30 cmH2O by the valve drive board.

1.8.4 Tube Color CodingAll the pneumatic tubes used in the AS3000 are color coded for use in the United States only.GAS O2 N2O AIR US STANDARD GREEN BLUE ORANGE

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2 Installation Guide2.1 Delivery of the A5 Anesthesia MachineThe following customer supplied material must be present before installation. Missing equipment may result in delays, incomplete installations, and/or additional service visits. Compatible emergency O2, N2O and AIR cylinders Agent vaporizers and key fillers, if not purchased with the A5 Liquid agent medication CO2 absorbent Pre-Paks or loose fill Active O2, N2O and AIR lines at 50 psi Dropdown hoses for ceiling mounted medical gas utilities compatible with quickdisconnect hoses, if not purchased with the A5

2.2 AssemblyNOTE: The A5 Breathing System Block is matched to the A5 that it is attached to by calibration and installation. After removing the Breathing System Block from the switchover platform of the A5, assure that the Breathing System Block is returned to the same A5 that it came from originally. If not, you must calibrate the Flow Sensor again.

2.2.1 Unpacking and SetupNOTE: When unpacking the unit, keep as much of the plastic covering on the unit. When all parts are unpacked, place the packing material from each box inside the box that it was found. Then, place the smaller box inside the large container. 1. Inspect the box for any damage, and report any damage or sign of tipping to the delivery carrier. Save all packing materials, invoice, and bill of lading. These may be required to process a claim with the carrier. Check all materials against the packing list. Contact the Customer Service Department at (800) 288-2121 or (201) 995-8237 for prompt assistance in resolving shipping problems. 2. Ensure the serial numbers on both carton labels match before assembling the system. 3. Cut and remove the shipping straps from the box.

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4. Pull the box top straight up off the box.

5. Pull the box straight up

6. Remove the plastic wrap from around the A5.

7. After removing the plastic wrap, check that there are four boxes (two large boxes and two small boxes).

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8. Remove the packing material from the side of the A5 on the area shown.

9. Cut the straps located near the bottom of the base of the container.

10. Remove the peace of wood at the front of the container as shown.