1、BRITISH STANDARD AEROSPACE SERIESBS EN3745-404:2005Fibres and cables, optical, aircraft use Test methods Part 404: Thermal shockThe European Standard EN 3745-404:2005 has the status of a British StandardICS 49.060g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g
2、44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Wed Aug 23 03:53:35 BST 2006, Uncontrolled Copy, (c) BSIBS EN 3745-404:2005This British Standard was published under the authority of the Standards Policy and
3、 Strategy Committee on 30 June 2006 BSI 2006ISBN 0 580 48637 0National forewordThis British Standard is the official English language version of EN 3745-404:2005. The UK participation in its preparation was entrusted by Technical Committee ACE/6, Aerospace avionic electrical and fibre optic technolo
4、gy, to Subcommittee ACE/6/-/10, Aerospace 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-referencesThe British Standards which implement international or European publicati
5、ons referred to in this document may be found in the BSI Catalogue under the section 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 necessar
6、y provisions of a contract. Users are responsible for its 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 international/European committee any enquiries on the interpre
7、tation, or proposals for change, and keep UK interests informed; monitor related 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, an inside back cover and a back cover.
8、The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Wed Aug 23 03:53:35 BST 2006, Uncontrolled Copy, (c) BSIEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 3745-404Nove
9、mber 2005ICS 49.060English VersionAerospace series - Fibres and cables, optical, aircraft use - Testmethods - Part 404: Thermal shockSrie arospatiale - Fibres et cbles optiques usagearonautique - Mthodes dessais - Partie 404 : ChocthermiqueLuft- und Raumfahrt - Faseroptische Leitungen frLuftfahrzeug
10、e - Prfverfahren - Teil 404: ThermischeSchocksThis European Standard was approved by CEN on 19 September 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any altera
11、tion. 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 European Standard exists in three official versions (English, French, German). A version in any other language made by translati
12、onunder 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 national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary,
13、Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart,
14、 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 3745-404:2005: ELicensed Copy: Wang Bin, na, Wed Aug 23 03:53:35 BST 2006, Uncontrolled Copy, (c) BSI2 Contents Foreword 3 1 Scope .4 2 Normative references .4
15、3 Preparation of specimens 4 4 Apparatus 4 5 Method .5 EN 3745-404:2005Licensed Copy: Wang Bin, na, Wed Aug 23 03:53:35 BST 2006, Uncontrolled Copy, (c) BSI3 Foreword This European Standard (EN 3745-404:2005) has been prepared by the European Association of Aerospace Manufacturers - Standardization
16、(AECMA-STAN). After enquiries and votes carried 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 gi
17、ven the status of a national standard, either 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
18、 subject of patent rights. CEN and/or CENELEC 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, Belgiu
19、m, Cyprus, Czech Republic, Den-mark, Estonia, 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 3745-404:2005Licensed Copy: Wang B
20、in, na, Wed Aug 23 03:53:35 BST 2006, Uncontrolled Copy, (c) BSI4 1 Scope This standard specifies a method to determine the effects of thermal shock on an optical fibre or cable. 2 Normative references The following referenced documents are indispensable for the application of this document. For dat
21、ed refer-ences, only the edition cited applies. For undated references, the latest edition of the referenced document (including 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 an
22、d cables, optical, aircraft use Test methods Part 100: General1)EN 3745-201, Aerospace series Fibres and cables, optical, 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 s
23、pecimens 3.1 lf not at standard test conditions, the specimens shall be subjected to standard test conditions and stabilised 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;
24、the number of temperature cycles, if not four cycles; maximum permissible variation in attenuation; the upper and lower temperatures at which test is carried out; relative humidity during the test; diameter of the coil. 4 Apparatus The test requires a suitable oven, a cold chamber capable of tempera
25、ture control of 2 C, a Light Launch System (LLS) and Light Detector System (LDS) as defined in EN 2591-100. A device to control the relative humidity during the test may also be required. 1) In preparation at the date of publication of this standard. EN 3745-404:2005Licensed Copy: Wang Bin, na, Wed
26、Aug 23 03:53:35 BST 2006, Uncontrolled Copy, (c) BSI5 5 Method 5.1 Procedure The specimen shall be coiled at all times and shall be arranged to be easily moved between the two temperature chambers. Once the sample is prepared, the attenuation reference measurement shall be taken in accordance with E
27、N 3745-301 method C. The specimen shall then be subjected to the required higher temperature for a period of 30 min. The specimen shall be removed from the oven and, within 2 min, placed in the cold chamber at lower temperature for 30 min. After the final chamber, bring the specimen back to the stan
28、dard test conditions. The duration shall be sufficient to allow the specimen to reach standard conditions. Attenuation shall be measured immediately after this cycle, test in accordance with EN 3745-301, method C. The cycle shall be carried out four times or the number of times specified in the prod
29、uct standard, on the same sample. 5.2 Final measurements and requirements The following shall be carried out after the test: EN 3745-201: Visual examination; EN 3745-301: Attenuation, method C, maximum change in attenuation shall be within that specified. EN 3745-404:2005Licensed Copy: Wang Bin, na,
30、 Wed Aug 23 03:53:35 BST 2006, Uncontrolled Copy, (c) BSIBS EN 3745-404:2005BSI389 Chiswick High RoadLondonW4 4ALBSI British Standards Institutiondependent national body responsible for preparing rds. It presents the UK view on standards in Europe and at the el. It is incorporated by Royal Charter.R
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