1、BRITISH STANDARD AEROSPACE SERIESBS EN3745-401:2005Fibres and cables, optical, aircraft use Test methods Part 401: Accelerated ageingThe European Standard EN 3745-401:2005 has the status of a British StandardICS 49.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g5
2、4g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 3745-401:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2006 BSI 2006ISBN 0 580 48644 3National forewordT
3、his British Standard is the official English language version of EN 3745-401:2005. 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, whi
4、ch has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the sec
5、tion entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. C
6、ompliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related
7、 international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendm
8、ents issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3745-401November 2005ICS 49.060English VersionAerospace series - Fibres and cables, optical, aircraft use - Testmethods - Part 401: Accelerated ageingSrie arospatiale - Fibres et cbles optiques usage
9、aronautique - Mthodes dessais - Partie 401 :Vieeillissement acclrLuft- und Raumfahrt - Faseroptische Leitungen frLuftfahrzeuge - Prfverfahren - Teil 401: BeschleunigteAlterungThis European Standard was approved by CEN on 19 September 2005.CEN members are bound to comply with the CEN/CENELEC Internal
10、 Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This
11、 European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the na
12、tional standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EURO
13、PEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 3745-401:2005: E2 Contents Fore
14、word 3 1 Scope .4 2 Normative references .4 3 Preparation of specimens 4 4 Apparatus 4 5 Method .5 EN 3745-401:20053 Foreword This European Standard (EN 3745-401:2005) has been prepared by the European Association of Aerospace Manufacturers - Standardization (AECMA-STAN). After enquiries and votes c
15、arried out in accordance with the rules of this Association, this Standard has re-ceived the approval of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, ei
16、ther by publication of an identical text or by endorsement, at the latest by May 2006, and conflicting national standards shall be withdrawn at the latest by May 2006. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CEN
17、ELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Den-mark, Esto
18、nia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxem-bourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. EN 3745-401:20054 1 Scope This standard specifies a method to determine the ef
19、fects of accelerated ageing on an optical fibre or cable. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refer-ences, only the edition cited applies. For undated references, the latest edition of the referenced document (in
20、cluding any amendments) applies. EN 2591-100, Aerospace series Elements of electrical and optical connection Test methods Part 100: General EN 3745-100, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 100: General1)EN 3745-201, Aerospace series Fibres and cables, optical,
21、 aircraft use Test methods Part 201: Visual inspection EN 3745-301, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 301: Attenuation 3 Preparation of specimens 3.1 lf not at standard test conditions, the specimens shall be subjected to standard test conditions and stabili
22、zed at these conditions for 24 h as defined in EN 3745-100. 3.2 The following details shall be specified if not already included in the product standard: the number of specimens; the number of turns around the mandrel; diameter of the mandrel; maximum permissible variation in attenuation; the temper
23、ature at which test is carried out; measurement intervals; time duration if not 168 h. 4 Apparatus The test requires a suitable oven, a mandrel, a Light Launch System (LLS) and Light Detector System (LDS) as defined in EN 2591-100. 1) In preparation at the date of publication of this standard. EN 37
24、45-401:20055 5 Method 5.1 Procedure The specimen shall be wrapped around the mandrel the specified number of times. The specimen shall be fixed so as to remain in contact with the mandrel throughout each turn. Connect the specimen to the LLS and LDS and obtain a reference attenuation measurement in
25、accordance with EN 3745-301, method C. Unless otherwise specified in the technical specification the specimen shall then be subjected to the required temperature for a period of 168 h. The test shall be carried out once, or the number of times specified in the product standard, on the same sample. A
26、ttenuation shall be measured, at the intervals specified, during the test in accordance with EN 3745-301, method C. 5.2 Final measurements and requirements Attenuation, during the test shall be within that specified. After being returned to ambient temperature the following test shall then be carrie
27、d out: EN 3745-301: Attenuation, method C, maximum change in attenuation shall be within that specified. The sample shall then be removed from the mandrel and straightened and the following test shall then be carried out: EN 3745-201: Visual examination. EN 3745-401:2005BS EN 3745-401:2005BSI389 Chi
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