Vision New Service Manual PB呼吸機(jī)維修資料

VentilatorySupportSystemSERVICE MANUALPAGE\*romanviBiPAPPAGE\*romanviBiPAPVisionServiceManual?Respironics,Inc.1062788PAGE\*romanv1062788BiPAPPAGE\*romanv1062788BiPAPVisionServiceManual?Respironics,Inc.TheBiPAPVisionVentilatorySupportSystemisthesubjectofU.S.patents#5148802,#5239995,#5313937,#5433193,andotherpendingU.S.andforeignpatents.BiPAPandVisionaretrademarksofRespironics/PhillipsHealthcare.Copyright?2009Respironics,Inc.ALLRIGHTSRESERVEDThisworkisprotectedunder17oftheUnitedStatescopyrightcodeandisthesolepropertyofRespironics.Nopartofthisdocumentmaybecopiedorotherwisereproduced,orstoredinanyelectronicinformationretrievalsystem,exceptasspecificallypermittedunderUnitedStatescopyrightwithoutthepriorwrittenconsentofRespironics.LimitedWarrantyRespironicswarrantsthattheVisionVentilatorySupportSystem(BiPAPVision)shallbefreefromdefectsofworkmanshipandmaterialsandwillperforminaccordancewiththeproductspecificationsforaperiodofoneyearfromthedateofsalebyRespironics.Iftheproductfailstoperforminaccordancewiththeproductspecifications,Respironicswillrepairorreplace—atitsoption—thedefectivematerialorpart.RespironicswillpaycustomaryfreightchargesfromRespironicstothedealerlocationThiswarrantydoesnotcoverdamagecausedbyaccident,misuse,abuse,alteration,andotherdefectsnotrelatedtomaterialsorworkmanship.Respironicsdisclaimsallliabilityforeconomicloss,lossofprofits,overheadorconsequentialdamageswhichmaybeclaimedtoarisefromanysaleoruseofthisproduct.Somestatesdonotallowtheexclusionorlimitationofincidentalorconsequentialdamages,sotheabovelimitationorexclusionmaynotapplytoyou.Thiswarrantyisgiveninlieuofallotherexpresswarranties.Inaddition,anyimpliedwarranty,includinganywarrantyofmerchantabilityorfitnessfortheparticularpurpose,islimitedtooneSomestatesdonotallowlimitationsonhowlonganimpliedwarrantylasts,sotheabovelimitationmaynotapplytoyou.Thiswarrantygivesyouspecificlegalrights,andyoumayalsohaveotherrightswhichvaryfromstatetostate.Thewarrantyforrepairsis90daysforlaborandoneyearonthepart(s)thatwasreplaced.Toexerciseyourrightunderthiswarranty,contactyourlocalauthorizedRespironicsdealerorcontactRespironicsat:Respironics,Inc.? Respironics?Deutschland1001MurryRidgeLane Gewerbestrasse17Murrysville,Pennsylvania 82211Herrsching15668-8550USA GermanyForTechnicalSupport,contact:Respironics.Inc.TechnicalServiceWithintheU.S.A.1-800-345-6443OutsidetheU.S.A.+1724-387-4000Facsimile+1724-387-5012service@TableofContentsIntroductionandIntendedUse 1-1ServiceNotice 1-2ToolsandEquipment 1-2TechnicalSupport 1-5Warnings,Cautions,andNotes 2-1Warnings 2-1Cautions 2-2Notes 2-2TheoryofOperation 3-1PSSBoard 3-7InputRange 3-7DCSupply 3-7OvervoltageDisconnect 3-8ACFailDetection 3-8Outputs 3-8MCBoard 3-9PowerCircuitry 3-10ErrorLED 3-10Real-TimeClockCircuit 3-10WatchdogandPowerOnResetCircuit 3-11ErrorLineControlCircuit(ELC) 3-11MicrocontrollerInterface 3-11PCBoard 3-12MicrocontrollerInterface 3-13BlowerMotorDrive 3-13PRVandILFRDrives 3-13PressureSensors 3-13ErrorLineControl(ELC)Circuit 3-13RS-232Connector 3-13DCBoard 3-14DC/DCConverter 3-15DisplayBacklightandContrastAdjustment 3-15DisplayVoltageDC/DCConverter 3-15ColdCathodeFluorescentTube(CCFT)Inverter 3-15ReferenceVoltageChecks 3-15PowerFailureAlarmBatteryEnable 3-15AlarmBatteryVoltageCutout/Check 3-15BackupBattery/Charger 3-15CheckVentLEDEnableCurrentCheck 3-15VentInopLEDCurrentCheck 3-16ErrorLineControl(ELC)Circuits 3-16ErrorLED 3-16DiagnosticInterface 3-16EEPROM 3-16LCDController 3-16Debouncing/KeypadMatrix 3-16RotaryEncoderControl 3-16AudibleAlarmActivation 3-16AudibleAlarmCurrentCheck 3-17SafeStatePowerOn 3-17WatchdogandLowVoltageReset 3-17AirflowModule(AFM) 3-18FlowBody 3-19AnalogReference 3-19FlowIndication 3-19PressureIndication 3-19TemperatureMeasurement 3-19Calibration 3-19ModuleDetection 3-19OxygenModule(OM) 3-20VentilatorModes 3-213.7.1CPAP 3-21Spontaneous/Timed(S/T) 3-21ProportionalAssistVentilation/TimedMode(PAV/T) 3-22NurseCall/RemoteAlarm(s/n106000andaboveonly) 3-23PeriodicMaintenance 4-1Cleaning 4-1AirInletFilterElement 4-2NylonMeshInletFilter 4-3OxygenRegulatorFilter 4-4Fuses 4-6InternalAlarmBattery 4-8LowInternalAlarmBatteryErrorCode 4-8RechargingtheInternalAlarmBattery 4-8VerifyingtheCharge 4-10PeriodicMaintenanceLog 4-11ComponentRemoval/Installation 5-1MajorComponents 5-2AirInletFilterElement 5-4Cleaning/ReplacingtheNylonMeshInletFilter 5-5OxygenRegulatorFilterandBowl 5-6Fuses 5-8VoltageSelection 5-9TopEnclosure 5-11FrontPanelEnclosure 5-12DisplayControl(DC)Board 5-14RotaryEncoder 5-15TouchPad 5-16LCDAssembly 5-18Blower 5-20OxygenModule(OM)Assembly 5-21AirFlowModule(AFM),OxygenBaffle 5-23PressureReliefValve(PRV) 5-24InlineFlowRestrictor(ILFR)Valve 5-25MainPowerSwitch 5-265.18Fan 5-27PressureControl(PC)Board 5-28MainControl(MC)Board 5-30Alarm 5-31PowerSupplySubsystem(PSS) 5-32RS-232Connector 5-33NurseCall/RemoteAlarmConnector 5-34ACInletAssembly 5-35Transformer 5-36PressureReliefValve(PRV)Enclosure 5-37BackPanelStrainRelief 5-38BumperFeet 5-39Troubleshooting 6-1TroubleshootingCommonProblems 6-2AlarmIndicators 6-4CheckVentandVentInopIndicators 6-4PatientAlarmIndicators 6-5AlarmSilenceandAlarmReset 6-5FlowLimitControl(FLC)State 6-6AlarmTroubleshooting 6-8TroubleshootingCheckVentErrorCodes 6-11TroubleshootingVentInopErrorCodes 6-13InterpretingErrorCodes 6-26VentInop,CheckVentErrorCode201,VentilationContinues 6-27TableofContentsTableofContentsTableofContentsTableofContentsPAGE\*romanviiBiPAPPAGE\*romanviiBiPAPVisionServiceManual?Respironics,Inc.1062788PAGE\*romanvii1062788BiPAPPAGE\*romanvii1062788BiPAPVisionServiceManual?Respironics,Inc.TestingandCalibration 7-1ExhalationPortTest 7-4ServiceLaptopSetup 7-7SelectingtheTestCable 7-7SettingUptheEquipment 7-8OperatingSystemSetup 7-9TransferringTotalOperatingHours 7-11Blower/ValveCalibration 7-13PerformanceVerification 7-15Run-inCycle 7-20SystemFinalTest 7-21SystemFinalTestSetup 7-23PowerIndicatorandLCDControlsTest 7-24PressureAccuracyTest 7-24FlowAccuracyTest 7-25DynamicPressureRegulationTest 7-26S/TModePerformanceTest 7-27OptionsandControls 7-27AlarmsTest 7-28OxygenModule(OM)Test 7-29PAV/TModeTest(ifinstalled) 7-31EarthResistanceandLeakageCurrentTest 7-31Nrsea/RemotelarmTest(fapcable) 7-32OxygenModule(OM)Calibration 7-36OptionsandUpgrades 8-1Options 8-1PAV/TMode 8-1OxygenBaffle 8-5Upgrades 8-8SerialNumber105999andBelow 8-8ObsoleteRepairKits 8-10PC/MC/DCUpgradeInstallation 8-11TableofContentsTableofContentsviiiBiPAPVisionviiiBiPAPVisionServiceManual?Respironics,Inc.10627881-110627881-11062788VisionServiceManual?Respironics,Inc.A PartsList A-18.4ReplacementPartPhotosA-8B SpecificationsB-18.5EnvironmentalB-18.6PhysicalB-18.7ElectricalB-18.8Pressure.................................................B-28.9ControlAccuracy...........................................B-38.10DisplayAccuracy..........................................B-38.11TriggerSensitivityB-38.12OxygenModuleInlet........................................B-38.13InternalBatteriesB-48.14SettingsB-58.15DisplayData.............................................B-6C SchematicsC-1Chapter1.IntroductionandIntendedUseTheVisionVentilatorySupportSystem(BiPAPVision)isamicroprocessor-controlled,positivepressureventilatoryassistsystem.TheVision(Figure1-1)userinterfaceincludesmulti-functionkeys,realtimegraphicdisplays,andintegralpatientandsystemalarms.Figure1-1:BiPAPVisionTheVisionfeaturesacentrifugalblowertogenerateairflowandinternaloxygenmodule,allowingsingleorcombinedgastherapy.Thesystemoperatesinthesemodes:continuouspositiveairwaypressure(CPAP)modespontaneous/timedpressuresupport(S/T)modepporoalttlio/ied(/)oe(nenainmodelsonly).Integratedsafetyandself-diagnosticfeaturescheckallsystemfunctionsatstart-upandduringoperation.Visualand/oraudibleindicatorsreportanyerrors.TheVisionregulatespressurebymonitoringproximalairwaypressureandadjustingflowsaccordinglytoensurethattheproximalpressureequalsthesetpressure.Chapter1Chapter1IntroductionandIntendedUseChapterChapter1IntroductionandIntendedUse1-PAGE6BiPAP1-PAGE6BiPAPVisionServiceManual?Respironics,Inc.10627881-PAGE51062788VisionServiceManual?Respironics,Inc.ServiceNotice ReadthismanualthoroughlypriortoperformingserviceormaintenanceontheVision.Thismanualcontainsadvancedtroubleshooting,calibration,andmaintenanceinstructions.Allmaintenanceandrepairworkshouldbeperformedbyqualifiedbiomedicaltechnicianswhohavereceivedappropriatetrainingandauthorizationtoprovidemaintenance,repair,andservicefortheVision.Equipment

Table1-1liststherecommendedtools,testequipment,andmaterialsrequiredtoserviceandmaintaintheBiPAPVision.Table1-1:ServiceToolsandEquipmentDescriptionManufacturerandmodelCommonhandtools:Flat-bladescrewdrivers,small(longshaft)andmediumPhillipsscrewdriver,mediumNutdrivers,1/4-in.,5/16-in.,11/32-in.,and7/16-in.1/4-in.wrenchNeedle-nosepliers,mediumLocalsupplierAntistaticworkstation,includinggroundedmatandwriststrapLocalsupplierElectricalsafetyanalyzerEarthresistance:Range0to19.99ohms.Resolution0.01ohms.Accuracy+5%+1digit.Leakagecurrent:Range0to19.99uA.Resolution1uA.Accuracy+1%+1digit(2.5to1kHz);+1digit(1kHzto1MHzDaleModelAnycommerciallyavailableelectricalsafetyanalyzerthatmeetsthesespecificationsDigitalmanometerRangeofatleast0to40cmH2OAccuracyofatleast+1.0%ofreading.CertifierPlusVentilatorGasAnalyzerwithhigh-flowmoduleandoxygensensorkit(P/N1040311)CertifierPluswithhigh-andlow-flowmodulesandoxygensensorkit(P/N1040312)Anycommerciallyavailabledigitalmanometerthatmeetsthesespecifications.Table1-1:ServiceToolsandEquipmentDescriptionManufacturerandmodelFlowmeterRangeofatleast0to150L/minAccuracyofatleast+1.0%ofreading.CertifierPluswithhigh-flowmoduleandoxygensensorkit(P/N1040311)CertifierPluswithhigh-andlow-flowmodulesandoxygensensorkit(P/N1040312)Anycommerciallyavailableflowmeterthatmeetsthesespecifications.Digitalmultimeter31/2-digitreadoutFluke87digitalmultimeterAnycommerciallyavailabledigitalmultimeterthatmeetsthesespecificationsServicelaptopcomputerWindowsoperatingsystemHyperTerminalorequivalentsoftwareAnycommerciallyavailablelaptopcomputerthatmeetsthesespecificationsOxygenanalyzerRange0.0to100%O2.Displayresolution0.1%O2.Accuracy+2%offullscale.CertifierPluswithhigh-flowmoduleandoxygensensorkit(P/N1040311)CertifierPluswithhigh-andlow-flowmodulesandoxygensensorkit(P/N1040312)AnycommerciallyavailableoxygenanalyzerthatmeetsthesespecificationsOxygentank,medicalgradeoxygen,andregulatorLocalsupplierMechanicaltestlungLungcapacityofatleast1.2LIngmarMedicalQuickLungtestlungMichiganInstrumentsModel1601or4600testlungAnycommerciallyavailabletestlungthatmeetsthesespecificationsBiPAPVisionservicekit(P/N1021276)Adjustableflowvalve(P/N1006120)Cable,D9M/F(P/N600075)Extractiontool(P/N1006874)Oxygenenrichmentkit(P/N312710)RS-232harness,MC,J3tobackpanel(P/N1004699)Siliconetube,5-in.x1/8-in.ID(x3)fitting,1/8in.ODcable(P/N582161)cablefors/n106000andabove(P/N1004823)orifice,0.25in.(P/N332353)WhisperSwivelIIassembly(P/N332113)Table1-1:ServiceToolsandEquipmentDescriptionManufacturerandmodelRespironicstestcable(s)BiPAPVisions/n105999andunder:P/N582161(noupgrade)P/Ns1004823andP/N1004699(ribboncable)(upgraded,newPC/MCboardsinstalled)BiPAPVisions/n106000andhigher:P/N1004823NOTE: ThesetestcablesareincludedinVisionservicekitP/N1021276.Pressuretubing,1/8-in.ID6in.6ft.OthermiscellaneouslengthsasrequiredLocalsupplierLoctite?222liquidthreadlockLocalsupplierTubing,smoothinnerlumen6-ft.length18-in.lengthOthermiscellaneouslengthsasrequiredP/N301016P/N100060ServiceflowvalveRespironicsP/N1037985NOTE: Thisitemcanbeusedinsteadoftheclamping-typevariableflowresistorP/N1002160.IsopropylalcoholLocalsupplierCleanersuchasFantastik?or409?LocalsupplierCleaningclothLocalsupplierBacteriafilter,22mmIDx22mmODLocalsupplierMilddetergentLocalsupplier

Respironicsiscommittedtocustomersatisfaction.ContactRespironicswithquestionsorfortechnicalsupport:U.S.andCanada:Phone:1-800-345-6443Fax:1-800-866-0245International:Phone:1-724-387-4000Fax:1-724-387-5012E-Mail:service@ForCustomerServiceandProductSupportcontact:Online:(Thispageisintentionallyblank.)2-PAGE31062788VisionServiceManual?Respironics,Inc.2-2BiPAPVision2-2BiPAPVisionServiceManual?Respironics,Inc.1062788Chapter2.Warnings,Cautions,andNotesThroughoutthismanualthefollowingdefinitionsapply:WARNING: Aconditionthatcouldcauseinjurytoapatientoroperatoriftheoperatinginstructionsinthismanualarenotfollowedcorrectly.CAUTION: Aconditionthatcouldcausedamageto,orshortentheservicelifeof,thedevice.NOTE: Importantinformationconcerningthedevice.Warnings ? DonotusetheVisioninthepresenceofaflammableanestheticmixturewithair,oxygen,ornitrousoxide.Oxygensupportscombustion.Donotuseoxygenwhilesmokingorinthepresenceofanopenflame.TheVisiondoesnotprovideanoxygensensortomonitoroxygenconcentrationsdeliveredtothepatientcircuit.UseoximetrytomonitortheuseofoxygenwiththeVision.IftheVentInop(wrench)iconlights,seeChapter6ofthismanualfortroubleshootinginformation.NeverattachoxygentubingoranypositivepressuresourcetothepressureportonthefrontpaneloftheVision.DonotattempttousetheRS-232connectoronthebackpanelofthedevicetoobtainrepairinformationduringoperationonapatient.ensurepersonalsafetyandcorrectdeviceperformance,onlyqualifiedtechniciansaretoperformrepairstotheVision.ContactRespironicsforservicetrainingandauthorizationinformation.Highvoltagesarepresentinsidethisdevice.avoidelectricalshock,disconnecttheelectricalsupplybeforeattemptinganyrepairsonthedevice.Forcontinuedprotectionagainstriskoffire,replacefuseswiththoseofthesametypeandratingavoidelectricshock,unplugtheVisionbeforecleaning.ChapterChapter2Warnings,Cautions,andNotesCautions ? Donotallowanyliquidtoenterthecabinetortheinletfilterduringcleaning.IftheVisionisexposedtotemperaturesnearthespecifiedlimitsforoperating,storage,ortransporttemperatures,allowthedevicetoacclimatetoroomtemperaturebeforeuse.Positiontheunitonitsbaseforproperoperation.AlwaysusetheVisionwithaninletfilterinstalled.Donotexceed100psigoxygensupplypressurewhenusingtheoxygenmodule.Electroniccomponentsusedinthisdevicearesubjecttoelectrostaticdischarge(ESD)damage.Performallrepairstothisdeviceinanantistatic,ESD-protectedenvironment.UseonlyRespironics-approvedrepairparts.Notes ? RefertotheVisionClinicalManualforguidelinesonapplicationsandoperation,andforacompletelistofoperationalwarnings,cautions,andnotes.Thisdevicecontainsarechargeablenickel-cadmium(NiCAD)batterywhichisusedbythealarmsintheeventofapowerfailure.Anon-rechargeablelithiumion(Li-ion)batteryontheMCboardpowersthereal-timeclock(RTC)circuitwhenthedeviceisoff.BatteriesmustbereplacedbyanauthorizedservicetechnicianusingRespironics-approvedbatteries.Disposeofbatteriesaccordingtomanufacturer’sinstructionsandinstitutionalprocedures.Followallapplicableregulationsregardingenvironmentalprotection.Theseboardsaregenerallyabbreviatedasfollows:Displaycontrol(DC)boardMaincontrol(MC)boardPressurecontrol(PC)board.However,theseabbreviationsreferspecificallytoolderboardsinnon-upgradedunits(builts/n105999andbelow):Displaycontrolsubsystem(DCS)boardMaincontrolsubsystem(MCS)boardPressureairflowsubsystemboard.Additionalwarnings,cautions,andnotesappearinthismanual.Chapter3.TheoryofOperationTheVisionisamicroprocessor-controlled,positivepressureventilatoryassistsystem.Thesystem’sintegralairintakefilterdrawsinambientairwhichisthenpressurizedbythesystem’scentrifugalblowerassembly.Intheblowerdischargethein-lineflowrestrictor(ILFR)valveandpressureregulationvalve(PRV)regulatetotalflowandpressurefromtheblower.Theoxygenmoduleaddsacontrolledsourceofsupplementaloxygen,upto100%,tothepatient.ensurethatthedevicedeliversgasaccordingtosettings,thepressurecontrol(PC)boardcontinuouslymonitorsairflowmodule(AFM)readingsfortotalgastemperature,generatedpressure,andpatientcircuitpressure.ThePCboardtransmitsprocessdatatothemaincontrol(MC)board,whichthenprovidesoverallcontroloftheVisionandsendsinstructionstothePCboardregardingrequiredILFR-PRVvalvestempositionsandblowerspeed.Theuniquedesignandoperationofthedevicemakesitsuitableformaskapplications.DesignedwiththeSensitivityfeaturethatautomaticallyadjuststochangingcircuitconditions,thedevicecanensureoptimumpatient-ventilatorsynchronicitydespitechangesinbreathingpatternsandcircuitleaks.(RefertotheVisionClinicalManual.)Aliquidcrystaldisplay(LCD)screenismountedonthefrontenclosure.TheLCDandthedisplaycontrol(DC)boardprovidetheprimaryuserinterfacetotheVision.Theuserinterfacedisplaysdata,providescontrols,andvisualandaudiblealarmindicators.Theuserusesthetouchpadandrotaryencodertoprovideinput,andthedisplayconfirmstheinput.Displayinformationvariesaccordingtothestateoftheventilatorandoperationsbeingperformed.TheVisionincorporatesthesesafetyfeaturesandself-diagnosticsystems:Thedeviceautomaticallychecksinternalsystemfunctionsatstartupandperiodicallythroughoutnormaloperation.Audibleandvisualalarmsoccurintheeventofprincipalsubsystemfailures.Audibleandvisualpatientalarmsoccurduringnormaloperation.ChapterChapter3ChapterChapter3TheoryofOperation3-2BiPAPVision3-2BiPAPVisionServiceManual?Respironics,Inc.10627883-31062788BiPAP3-31062788BiPAPVisionServiceManual?Respironics,Inc.TheoryofOperationVentilatorsettingsaresavedincaseofACpowerloss.TheventilatorsoftwarerevisiondetermineshowoperationresumesfollowinganACpowerloss:Softwareversions11.0-11.11,12.0-12.7,and13.0-13.7:IfACpowerislostforapproximately10secondsorlessandthepowerswitchremainsON,theventilatorperformsasystemselftestandreturnstonormaloperationusingthesamesettingsthatwereineffectbeforetheACpowerloss.IftheACpowerlossislongerthanapproximately10secondsandthepowerswitchremainsON,theventilatorperformsasystemselftest,displaystheExhalationPortscreen,anddoesnotresumeventilation.Softwareversions11.12,12.8,13.8andhigher:IfACpowerislostforanylengthoftimeandthepowerswitchremainsON,theventilatorresumesoperationthatwasineffectatthetimeoftheACpowerloss.Forallsoftwareversions,ifthepowerswitchisturnedOFFafterACpowerislost,whenACpowerisrestoredandthepowerswitchisturnedON:theventilatorperformsthesystemselftest,displaystheExhalationPortscreen,anddoesnotautomaticallyresumeventilation.Table3-1summarizesthemajorBiPAPVisionsubsystems.Table3-1:BiPAPVisionSubsystemsSubsystemFunctionPowersupplysubsystem(PSS)ProvidesthebulksupplyDCvoltagetotheBiPAPVisionsubsystems.Maincontrol(MC)boardPerformsallcontrol,dataacquisition,andcalculationsrequiredforuser-selectedparameters.TheMCboardalsoperformsthestart-uptestandreportsallerrors.(AbbreviatedasMCSboardwhenreferringspecificallytoolderboardsinnon-upgradedunitsbuilts/n105999andbelow.)Pressurecontrol(PC)boardControlstheblowerandvalvestogenerateandregulatesystempressure.ThePCboardsensesoutletpressureandpatientpressureandregulatesoutletpressuretothepatientcircuit.(Abbreviatedasboardwhenreferringspecificallytoolderboardsinnon-upgradedunitsbuilts/n105999andbelow.)Displaycontrol(DC)boardEvaluatesuserinputsfromthetouchpadandpassesvalidparameterstotheMCboard.TheDCboardreceivesdisplaydatafromtheMCboard.TheDCboardalsohasitsowninternalfunctions,whoseresultsarereportedtotheMCboard.(AbbreviatedasDCSboardwhenreferringspecificallytoolderboardsinnon-upgradedunitsbuilts/n105999andbelow.)Airflowmodule(AFM)Includesthemassairflowsensorintheairstream,andprovidesanairflowmeasurementinterfacetothePCboard,allowingthePCboardtomeasuretotalflow,temperature,andsystempressure.In-lineflowrestrictor(ILFR)Regulatesthetotalflowfromtheblowerdischarge.Pressureregulationvalve(PRV)Opensduringexhalationtoallowpatientflowexhaust.Oxygenmodule(OM)Regulatestheoxygenreleasedintotheairfromthebloweraccordingtothesetoxygenconcentrationlevel.Figure3-1showstheBiPAPVisionblockdiagram.FilterenclosureBlowermufflerBlowerILFRvalvePRVvalveO2baffleAFMflowbody**Appliestounitswiths/n106000andabove**Oxygenbaffleinstalledinnewer(s/n106000andabove)andupgradedunitsChapter3Chapter3TheoryofOperationChapterChapter3TheoryofOperation3-PAGE6BiPAP3-PAGE6BiPAPVisionServiceManual?Respironics,Inc.10627883-PAGE51062788BiPAPVisionServiceManual?Respironics,Inc.(Thispageisintentionallyblank.)Figure3-2showstheBiPAPVisionpneumaticblockdiagram.ProportionalOxygenValve

AmbientAirOxygenRegulatorOxygenFlowSensorOxygenModuleOxygenRegulatorOxygenFlowSensorOxygenModule50-100PSIOxygenInletToPCBoardJ8ToPCBoardJ6AirinletFilterToPCBoardJ7OxygenBaffleAirFlowSensorOuttoPatientILFRPRVThermistorBlowerMufflerBlowerToPCBoardJ4ToPCBoardMT3ToPCBoardJ5ExhaustMufflerPressureAirFigure3-2:BiPAPVisionPneumaticBlockDiagram(Thispageisintentionallyblank.)ChapterChapter3TheoryofOperationChapter3Chapter3TheoryofOperation3-PAGE231062788VisionServiceManual?Respironics,Inc.3-PAGE24BiPAP3-PAGE24BiPAPVisionServiceManual?Respironics,Inc.1062788PSSBoard ThePSSboard(Figure3-3)suppliestheMC,PC,andDCboardswiththe