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-THREATENINGHIGHVOLTAGESAREPRE

2、SENTINBOTHDECKUNITANDUNDERWATERUNITWHENPOWERISON.THESEHAZARDOUSVOLTAGESPERSISTFORUPTOONEMINUTEAFTERREMOVALOFPOWER..THEBESTWAYTOPROTECTAGAINSTELECTRICALSHOCKISTODISCONNECTTHEACPOWERCORDSFROMTHEREARPANELOFTHEDECKUNIT,THENWAITAFULLMINUTEBEFOREATTEMPTINGSERVICE.ALWAYS

3、DISCONNECTTHEACPOWERCORDBEFORECHECKINGFUSES!!!Forprotectionofthecircuitry,wealsorecommendthatACpowerberemovedanda1minuteperiodforsupplycapacitordischargebeallowedbeforeopeninghousings,changingconnections,removingorinsertingcircuitcards,orotherwiseworkingontheequip

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

5、itry.Referalsotothesectiontitled'schematics'whichcontainstheunderwaterunitschematicdiagrams.Allvoltagesaremeasuredrelativetopin2ofanyplug-incard;thisismainsignal/powergroundfortheunderwaterunit.5-1.1UNDERWATERUNITCOMPLETELYINOPERATIVEMakesurethatthedeckunitissuppl

6、yingtheproperseacablevoltage(250volts).Ifthereisnosea-cablevoltage,theseacablerearpanelfusemaybeblown.WithSEARAMunits,seethatSEARAMissupplyingthepropervoltagetotheCTD(12-15volts).Lookforthepresenceofthetelemetrywaveformacrosstheseacable.USEEXTREMECAUTIONINPERFORMI

7、NGTHISOBSERVATION.THESEACABLEVOLTAGEISPOTENTIALLYLIFE-THREATENING!ALLOW1MINUTEAFTERPOWER-DOWNFORPOWERSUPPLYDISCHARGEBEFOREMAKINGCONNECTIONSTOTHESEACABLEOUTPUTCONNECTOR.Ifthetelemetrywaveformispresent,thetroubleisprobablyinthedeckunit.Ifthetelemetrywaveformisnotpre

8、sentatthedeckunit,measuretheseacablecurrentwhichwillbeintherangeof50to220milliamperesdependingontheunderwaterunitconfiguration.Iftheseacablevoltageispre