1、BRITISH STANDARD AEROSPACE SERIES BS EN 2591-602:2001 Elements of electrical and optical connection Test methods Part 602: Optical elements Variation of attenuation and optical discontinuity The European Standard EN 2591-602:2001 has the status of a British Standard ICS 49.060 NO COPYING WITHOUT BSI
2、 PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBS EN 2591-602:2001 This British Standard, 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 14 December 2001 BSI 14 Dec
3、ember 2001 ISBN 0 580 38071 8 National foreword This British Standard is the official English language version of EN 2591-602:2001. The UK participation in its preparation was entrusted to Technical Committee ACE/6, Aerospace Avionic Electrical and Optical Technology, to Subcommittee ACE/6/10, Aeros
4、pace - Fibre optic systems and equipment, which has the responsibility to: A list of organizations 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
5、may be found in the BSI Standards Catalogue under the section entitled “International Standards 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 Britis
6、h Standards are responsible for their correct application. Compliance with a British Standard 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, a
7、nd keep the UK interests informed; monitor related international and European developments and 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 4, an inside back cover and a back cover. The BSI copyright date disp
8、layed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN2591602 November2001 ICS49.060 Englishversion AerospaceseriesElementsofelectricalandopticalconnection TestmethodsPart602:Opti
9、calelementsVariationof attenuationandopticaldiscontinuity SriearospatialeOrganesdeconnexionlectriqueet optiqueMthodesdessaisPartie602:Organesoptiques Variationdattnuationetdiscontinuitoptique LuftundRaumfahrtElektrischeundoptische VerbindungselementePrfverfahrenTeil602:Optische ElementeDmpfungsnderu
10、ngundoptische Unterbrechung ThisEuropeanStandardwasapprovedbyCENon4June2001. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings
11、uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamest
12、atusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALIS
13、ATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2001CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN2591602:2001EEN2591602:2001(E) 2 Foreword ThisEuropeanStandardhasbeenpreparedbytheEuropeanAssociationofAerospaceManu
14、facturers (AECMA). AfterinquiriesandvotescarriedoutinaccordancewiththerulesofthisAssociation,thisStandardhas receivedtheapprovaloftheNationalAssociationsandtheOfficialServicesofthemembercountriesof AECMA,priortoitspresentationtoCEN. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,either
15、bypublicationofanidentical textorbyendorsement,atthelatestbyMay2002,andconflictingnationalstandardsshallbewithdrawnat thelatestbyMay2002. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Czec
16、hRepublic,Denmark, Finland,France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Netherlands,Norway,Portugal, Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN2591602:2001(E) 3 1 Scope Thisstandardspecifiesmethodsofdetectingvariationofattenuationandopticaldiscontinuityofthe transmittedsignalduringenvi
17、ronmentalormechanicaltestingforopticalconnectionelements(including permanentconnections)andfibreopticcouplers. ItshallbeusedtogetherwithEN2591100. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreferenceprovisionsfromotherpublications. Thesenormativereferencesarecitedattheappr
18、opriateplacesinthetextandthepublicationsarelisted hereafter.Fordatedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplyto thisEuropeanStandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthe latesteditionofthepublicationreferredtoapplies. EN2591100 Aerospac
19、eseriesElementsofelectricalandopticalconnectionTestmethods Part100:General 1) 3 Preparationofspecimens 3.1 Specimensshallbepreparedasdefinedintheproductstandardandforeachmethodoftest: thefibreendsshallcomplywithrequirementsofEN2591100(Fibreendpreparationandtermination cleaning); thefibreendsshallbef
20、ixedtothelightlaunchandlightdetectorsystemsasdefinedinEN2591100; thefibre/cableusedforthetestshallmeettherequirementsoftheopticalconnectionelementor coupler; movementofthefibres/cablesandtemporaryjointsshallbeminimizedduringthetestsetupand testingprocess; theminimumbendradiusofthefibre/cableshallnot
21、beexceeded. Unlessotherwisespecified,specimensshallbefittedwithnormalaccessoriesandterminatedwith(2 0,2)m lengthofcable.Ifnecessary,temporaryjointsshallbeused. Ifareferencecable/fibreisrequired,itslengthshallbe4manditshallbepreparedfromthesamebatchand terminatedbythesamemethodusedforthespecimens. Op
22、ticalcontactsshallbeassembledintotheappropriateopticalconnectionelement. 3.2 Unlessotherwiseindicatedinthetechnicalspecification,thefollowingdetailsshallbespecified: numberofmeasurementstobeaveraged; numberofchannelstobetestedinamultichanneldevice; minimumbandwidthofthedetectiondevice. 3.2.1 Variati
23、onofattenuation(MethodA) Maximumpermissiblevariationofattenuation Samplingrateofattenuation Typeofcable/fibre 3.2.2 Opticaldiscontinuity(MethodB) Durationofdiscontinuitytobemeasured Acceptablenumberofdiscontinuities Typeofcable/fibre DiscontinuitythresholdindB 1) PublishedasAECMAPrestandardatthedate
24、ofpublicationofthisstandardEN2591602:2001(E) 4 4 Apparatus Itshallcomprise: aLightLaunchSystem(LLS)asdefinedinEN2591100; aLightDetectorSystem(LDS)asdefinedinEN2591100. 5 Methods 5.1 Procedure 5.1.1 MethodAVariationofattenuation Unlessotherwisespecified,thespecimenundertestshallbeconnectedthroughthec
25、able/fibretothe measuringequipments. Settheattenuationleveltozerotoobtainareferencevalue. Proceedtothetestandcheckcontinuouslythevariationofattenuation. Figure1showsatypicaltestarrangement. 5.1.2 MethodBOpticaldiscontinuity Unlessotherwisespecified,thespecimenundertestshallbeconnectedthroughthecable
26、/fibretothe measuringequipments. Adjustthresholds(dBdropandtimeduration)asspecifiedintheproductstandard. Checkthetransmittedsignal,anydiscontinuitiesdetectedatthispointshallbetracedtotheirsource,and eliminated.Discontinuitieswhichcannotbeeliminatedshallbeaccountedforintheperformanceassessment ofthet
27、estspecimen. Figure1showsatypicaltestarrangement. Key 1 Specimen 2 Processingsystem Figure1 5.2 Requirements Discontinuitiesand/orvariationofattenuationshallberecordedaccordingtothecharacteristicsdefinedinthe productstandard. Extraneousdiscontinuitiesand/orvariationofattenuationattributabletothemalf
28、unctionofthemeasuring equipmentshallbediscounted. Thenumberofdiscontinuitiesand/orvariationsofattenuationshallnotexceedthatspecifiedintheproduct standard.BS EN 2591-602:2001 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible fo
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