多传感器检测系统信号处理研究外文翻译

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1、外文翻译毕业设计题目：多传感器检测系统信号处理研究原文1：911plusCTDSYSTEMOPERATINGANDREPAIRMANUAL5-1译文1：911plusCTD系统的操作和维修手册5-1原文2：911plusCTDSYSTEMOPERATINGANDREPAIRMANUAL5-2译文2：911plusCTD系统的操作和维修手册5-21-3TROUBLEDIAGNOSISANDREPAIR(UNDERWATERUNITPROBLEMS)(原文1)LIFE-THREATENINGHIGHVOLTAGE

2、SAREPRESENTINBOTHDECKUNITANDUNDERWATERUNITWHENPOWERISON.THESEHAZARDOUSVOLTAGESPERSISTFORUPTOONEMINUTEAFTERREMOVALOFPOWER..THEBESTWAYTOPROTECTAGAINSTELECTRICALSHOCKISTODISCONNECTTHEACPOWERCORDSFROMTHEREARPANELOFTHEDECKUNIT,THENWAITAFULLMINUTEBEFOREATTEMPTING

3、SERVICE.ALWAYSDISCONNECTTHEACPOWERCORDBEFORECHECKINGFUSES!!!Forprotectionofthecircuitry,wealsorecommendthatACpowerberemovedanda1minuteperiodforsupplycapacitordischargebeallowedbeforeopeninghousings,changingconnections,removingorinsertingcircuitcards,orother

4、wiseworkingontheequipment.IfthedatatelemetryisOK(deckunitdatalightisonanderrorlightoff)butoneormorechannelsisfaulty,seeSection5-2(SensorProblems)beforeproceedingwithworkontheunderwaterunit;theproblemmaybeadefectivesensor.ReadSection4-1whichdescribestheopera

5、tionoftheunderwaterunitcircuitry.Referalsotothesectiontitled'schematics'whichcontainstheunderwaterunitschematicdiagrams.Allvoltagesaremeasuredrelativetopin2ofanyplug-incard;thisismainsignal/powergroundfortheunderwaterunit.5-1.1UNDERWATERUNITCOMPLETELYINOPER

6、ATIVEMakesurethatthedeckunitissupplyingtheproperseacablevoltage(250volts).Ifthereisnosea-cablevoltage,theseacablerearpanelfusemaybeblown.WithSEARAMunits,seethatSEARAMissupplyingthepropervoltagetotheCTD(12-15volts).Lookforthepresenceofthetelemetrywaveformacr

7、osstheseacable.USEEXTREMECAUTIONINPERFORMINGTHISOBSERVATION.THESEACABLEVOLTAGEISPOTENTIALLYLIFE-THREATENING!ALLOW1MINUTEAFTERPOWER-DOWNFORPOWERSUPPLYDISCHARGEBEFOREMAKINGCONNECTIONSTOTHESEACABLEOUTPUTCONNECTOR.Ifthetelemetrywaveformispresent,thetroubleispro

8、bablyinthedeckunit.Ifthetelemetrywaveformisnotpresentatthedeckunit,measuretheseacablecurrentwhichwillbeintherangeof50to220milliamperesdependingontheunderwaterunitconfiguration.Iftheseacablevoltageispre