1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 3745-515:2012Aerospace series Fibres andcables, optical, aircraft use Test methodsPart 515: Buffer insertion forceBS EN 3745-515:2012 BRITISH STANDARDNational forewordThis
2、British Standard is the UK implementation of EN 3745-515:2012.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/6, Aerospace avionic electrical and fibre optictechnology.A list of organizations represented on this committee can beobtained on request to its secretary.Thi
3、s publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 77590 1ICS 49.090Compliance with a British Standard cannot confer immuni
4、ty fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2012.Amendments issued since publicationDate Text affectedBS EN 3745-515:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3745-515 July 2012 ICS 49.090 En
5、glish Version Aerospace series - Fibres and cables, optical, aircraft use - Test methods - Part 515: Buffer insertion force Srie arospatiale - Fibres et cbles optiques usage aronautique - Mthodes dessais - Partie 515: Force dinsertion de la gaine intermdiaire Luft- und Raumfahrt - Faseroptische Leit
6、ungen fr Luftfahrzeuge - Prfverfahren - Teil 515: Steckkraft der Sekundr-Beschichtung This European Standard was approved by CEN on 23 March 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of
7、a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German).
8、 A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cy
9、prus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United K
10、ingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3745-515:2012: E
11、BS EN 3745-515:2012EN 3745-515:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Preparation of specimens .44 Apparatus .45 Method 5BS EN 3745-515:2012EN 3745-515:2012 (E) 3 Foreword This document (EN 3745-515:2012) has been prepared by the Aerospace and Defence Industries Associ
12、ation of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This
13、European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2013, and conflicting national standards shall be withdrawn at the latest by January 2013. Attention is drawn to the possibility that some of the
14、 elements of this document may be the 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 organisations of the following countries are bound to implement th
15、is European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovak
16、ia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 3745-515:2012EN 3745-515:2012 (E) 4 1 Scope This European Standard specifies procedures for the practical measurement of the force required to move the buffer a specified distance relative to the outer jacket. 2 Normative
17、 references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) appl
18、ies. EN 2591-100, Aerospace series Elements of electrical and optical connection Test methods Part 100: General EN 2591-601, Aerospace series Elements of electrical and optical connection Test methods Part 601: Optical elements Insertion loss EN 2591-602, Aerospace series Elements of electrical and
19、optical connection Test methods Part 602: Optical elements Variation of attenuation and optical discontinuity EN 3745-100, Aerospace series Fibres and cables, optical, aircraft use Test methods Part 100: General 3 Preparation of specimens 3.1 The fibre ends shall be terminated with termini designed
20、for semi-loose structure fibre optic cable. 3.2 The length of fibre to be tested shall be in accordance with the applicable product standard. 3.3 The number of specimens shall be in accordance with the applicable product standard. 4 Apparatus 4.1 A micrometre with at least 0,1 mm resolution shall be
21、 used to measure the buffer movement over the distance specified in the applicable product standard. 4.2 A force gauge with at least 0,1 N resolution, capable of measuring the applicable force required to move the buffer the distance specified in the applicable product standard. 4.3 A mechanical fix
22、ture which will hold the terminated specimen in the compression apparatus and not permit any horizontal or vertical movement of the terminus body. A typical arrangement is shown in Figure 1. BS EN 3745-515:2012EN 3745-515:2012 (E) 5 Key 1 Compression distance 2 Force applied 3 Terminus ferrule 4 Ter
23、minus fixture 5 Clamp 6 Fibre optic cable (terminated on one end) Figure 1 5 Method 5.1 Procedure a) Install the terminus, on both cable ends. b) Cut the assembly at the midway point and then clamp the unterminated end with sufficient force to prevent buffer movement. c) Attach the terminated end of
24、 the cable to the compression apparatus. d) Apply sufficient force to compress the ferrule the distance specified in the product standard and record the force required. e) Repeat steps c) and d) on the other terminated end of cable assembly. 5.2 Final measurements and requirements Record the average
25、 of the measured force to move the buffer the specified distance on each specimen end. The average shall not exceed the value in the applicable product standard. This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing British S
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