1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-607:2002 Elements of electrical and optical connection Test methods Part 607: Optical elements Immunity to ambient light coupling The European Standard EN 2591-607:2002 has the status of a British Standard ICS 49.060 BS EN 2591-607:2002 This British Stand
2、ard, having been prepared under the direction of the Engineering Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 12 July 2002 BSI 12 July 2002 ISBN 0 580 40043 3 National foreword This British Standard is the official English
3、language version of EN 2591-607:2002. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technology, to Subcommittee ACE/6/10, Aerospace Fibre optic systems and equipment which has the responsibility to: A list of organiza
4、tions represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standar
5、ds Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard
6、 does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments an
7、d promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Da
8、te CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN2591607 June2002 ICS49.060 Englishversion AerospaceseriesElementsofelectricalandopticalconnection TestmethodsPart607:OpticalelementsImmunityto ambientlightcoupling SriearospatialeOrganesdeconnexionlectriqueet optiqueMthodesdessaisPartie607:
9、Organesoptiques Immunitdecouplagelalumireambiante LuftundRaumfahrtElektrischeundoptische VerbindungselementePrfverfahrenTeil607:Optische ElementeFremdlichteinkopplung ThisEuropeanStandardwasapprovedbyCENon8February2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatethe
10、conditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German
11、).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,It
12、aly,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwid
13、eforCENnationalMembers. Ref.No.EN2591607:2002EEN2591607:2002(E) 2 Foreword Thisdocument(EN2591607:2002)hasbeenpreparedbytheEuropeanAssociationofAerospace Manufacturers(AECMA). AfterenquiriesandvotescarriedoutinaccordancewiththerulesofthisAssociation,thisStandardhas receivedtheapprovaloftheNationalAs
14、sociationsandtheOfficialServicesofthemembercountriesof AECMA,priortoitspresentationtoCEN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidentical textorbyendorsement,atthelatestbyDecember2002,andconflictingnationalstandardsshallbe withdrawnatthelatestbyDecember2
15、002. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark, Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway, Portugal,Spain,Sweden,Swi
16、tzerlandandtheUnitedKingdomEN2591607:2002(E) 3 1 Scope Thisstandardspecifiesamethodofmeasuringtheimmunityofopticalconnectionelements(including permanentconnections)andfibrecouplerstothecouplingofpowercomingfromanexternallightsource. ItshallbeusedtogetherwithEN2591100. 2 Normativesreferences ThisEuro
17、peanStandardincorporatesbydatedorundatedreferenceprovisionsfromotherpublications. Thesenormativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelisted hereafter.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplyto thisEuropeanStandardonlywhenincor
18、poratedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies. EN2591100 AerospaceseriesElementsofelectricalandopticalconnectionTestmethods Part100:General 1) 3 Preparationofspecimens 3.1 Thespecimensshallbefittedwithnormalaccessoriesandterminatedasspecified
19、intheproduct standard.Cavitieswithunterminatedcontactsshallhavefillerplugsfitted(whereapplicable). 3.2 Unlessspecifiedinthetechnicalspecification,thefollowingdetailsshallbestated: typeandlengthofcable/fibre; spectralcharacteristicsofthelightsourceorcolortemperatureoftheblackbodyradiation. 4 Apparatu
20、s Theapparatusshallcomprise: C amodulatorsettofrequencywhichisnotamultipleof50Hzor60Hz; D adetector; Di adiffuser; IS anintegrationsphere; LA alockingamplifiertoachievethedetectionmeasurement; LDS aLightDetectorSysteminaccordancewiththespectralcharacteristicsofthelightsource; Le alens; LS aLightSour
21、ce; T aterminatortoprovideanonreflectivetermination; aremovablelightproofelementofthesamelengthasthespecimen; 1) PublishedasAECMAPrestandardatthedateofpublicationofthisstandardEN2591607:2002(E) 4 Atypicalarrangementisshowninfigure1. Figure1 5 Method Themethodconsistsofmeasuringtheambientlightcoupled
22、inthespecimenbytheuseofanintegrated sphere(seefigure1). 5.1 Procedure Installthespecimeninthelightproofelement. TurnontheLS,C,D,LDSandLA. Insertthespecimenwiththeremovablelightproofelementintheintegratedsphere. AdjustthepowerofLSsothattheoutputpowerisclosetotheupperdetectionlimitsofDandthenmeasure t
23、heoutputpowers P o and P f . Removethelightproofelement. Ifnecessary,adjustthepowerofLSagainsothatnew Pvalue P 1 isequalto P o . Measurethenewpower P c .EN2591607:2002(E) 5 P o = levelofopticalpowerlaunchedintotheintegrationsphereafterinsertionoftheremovablelight proofelementwiththespecimen P 1 = le
24、velofopticalpowerlaunchedintotheintegrationsphereafterthelightproofelementhasbeen removed P f = ambientlightcoupledinthespecimenintheremovablelightproofelement P c = ambientlightcoupledinthespecimenoncethelightproofelementhasbeenremoved 5.2 Finalmeasurementsandrequirements Calculatetheexternallightc
25、ouplingcoefficientwiththehelpofthefollowingequation: Couplingcoefficient(dB) = o f c P P P - NOTE Thiscalculationassumesthatvalues Poand P1areequal.BS EN 2591-607:2002 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for prep
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