1、BSI Standards PublicationOptical fibresPart 1-52: Measurement methods and test procedures Change of temperature testsBS EN 60793-1-52:2014National forewordThis British Standard is the UK implementation of EN 60793-1-52:2014. It isidentical to IEC 60793-1-52:2014. It supersedes BS EN 60793-1-52:2002w
2、hich is withdrawn.The UK participation in its preparation was entrusted by TechnicalCommittee GEL/86, Fibre optics, to Subcommittee GEL/86/1, Optical fibresand cables.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to
3、 include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2014Published by BSI Standards Limited 2014ISBN 978 0 580 82235 3ICS 33.180.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This
4、British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2014.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60793-1-52:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 60793-1-52 May 2014 ICS 33.180.10 Su
5、persedes EN 60793-1-52:2002 English Version Optical fibres - Part 1-52: Measurement methods and test procedures - Change of temperature tests (IEC 60793-1-52:2014) Fibres optiques - Partie 1-52: Mthodes de mesure et procdures dessai - Essais de variations de temprature (CEI 60793-1-52:2014) Lichtwel
6、lenleiter - Teil 1-52: Messmethoden und Prfverfahren - Temperaturwechsel (IEC 60793-1-52:2014) This European Standard was approved by CENELEC on 2014-03-12. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
7、the status of 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 CENELEC member. This European Standard exists in three official versions (English
8、, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Au
9、stria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Sp
10、ain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CENELEC All rights o
11、f exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 60793-1-52:2014 E BS EN 60793-1-52:2014EN 60793-1-52:2014 - 2 - Foreword The text of document 86A/1528/CDV, future edition 2 of IEC 60793-1-52, prepared by SC 86A “Fibres and cables“ of IEC/TC 86 “Fibre o
12、ptics“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 60793-1-52:2014. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2014-12-12 latest dat
13、e by which the national standards conflicting with the document have to be withdrawn (dow) 2017-03-12 This document supersedes EN 60793-1-52:2002. EN 60793-1-52 includes the following significant technical changes with respect to EN 60793-1-52:2002: a) Harmonizing the content with sectional specific
14、ations of relevant fibre types; b) Extending the applicability of the document to class C single-mode fibres. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or
15、all such patent rights. Endorsement notice The text of the International Standard IEC 60793-1-52:2014 was approved by CENELEC as a European Standard without any modification. BS EN 60793-1-52:2014- 3 - EN 60793-1-52:2014 Annex ZA (normative) Normative references to international publications with th
16、eir corresponding European publications 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 (in
17、cluding any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here: www.cenelec.eu P
18、ublication Year Title EN/HD Year IEC 60068-2-14 - Environmental testing - Part 2-14: Tests - Test N: Change of temperature EN 60068-2-14 - IEC 60793-1-40 (mod) 2001 Optical fibres - Part 1-40: Measurement methods and test procedures - Attenuation EN 60793-1-40 2003 IEC 60793-2-10 - Optical fibres -
19、Part 2-10: Product specifications - Sectional specification for category A1 multimode fibres EN 60793-2-10 - IEC 60793-2-50 - Optical fibres - Part 2-50: Product specifications - Sectional specification for class B single-mode fibres EN 60793-2-50 - IEC 60793-2-60 - Optical fibres - Part 2-60: Produ
20、ct specifications - Sectional specification for category C single-mode intraconnection fibres EN 60793-2-60 - BS EN 60793-1-52:2014 2 60793-1-52 IEC:2014 CONTENTS 1 Scope 5 2 Normative references 5 3 Apparatus 5 3.1 Chamber 5 3.2 Other apparatus . 5 4 Sampling and specimens . 6 5 Procedure 6 5.1 Gen
21、eral 6 5.2 Optical measurements . 6 5.3 Conditioning . 6 5.4 Recovery . 7 6 Pass/fail criteria . 7 7 Results 7 7.1 Information to be provided with each test . 7 7.2 Information to be available upon request 7 8 Specification information . 7 BS EN 60793-1-52:201460793-1-52 IEC:2014 5 OPTICAL FIBRES Pa
22、rt 1-52: Measurement methods and test procedures Change of temperature tests 1 Scope This part of IEC 60793 provides a practical method for evaluating fibre performance in a defined environment. The purpose of this standard is to define a test that determines the suitability of sub-category A1a to A
23、1d multimode fibres and class B and C single-mode fibres to withstand the environmental condition of change in temperature which may occur in actual use, storage and/or transport. The test is primarily intended to permit the observation of effects of change of temperature over a given period. This p
24、rocedure is conducted in accordance with IEC 60068-2-14, Test Nb. NOTE The applicability of this test to other fibre categories is under study. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cit
25、ed applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-2-14, Environmental testing Part 2-14: Tests Test N: Change of temperature IEC 60793-1-40:2001, Optical fibres Part 1-40: Attenuation measurement methods IEC 60793-2-10, Op
26、tical fibres Part 2-10: Product specifications Sectional specification for category A1 multimode fibres IEC 60793-2-50, Optical fibres Part 2-50: Product specifications Sectional specification for class B single-mode fibres IEC 60793-2-60, Optical fibres Part 2-60: Product specifications Sectional s
27、pecification for class C single-mode intraconnection fibres 3 Apparatus 3.1 Chamber The apparatus consists of an environmental chamber in accordance with IEC 60068-2-14, Test Nb. The chamber shall be capable of housing the specimen and of allowing measurement during conditioning. It shall also be ca
28、pable of maintaining the specified temperatures within the specified tolerances. Forced air circulation may be used to maintain homogeneous conditions. The chamber and accessories shall be constructed and arranged in such a manner as to avoid condensation dripping on the specimen. 3.2 Other apparatu
29、s Additional apparatus may be necessary to perform the examinations and measurements (or as specified in the detail specification). BS EN 60793-1-52:2014 6 60793-1-52 IEC:2014 4 Sampling and specimens To ensure the required repeatability on optical measurements, the length of the specimen shall be a
30、t least 1 000 m for fibre sub-categories A1a to A1d, and at least 2 000 m for fibre class B and C. The amount of the specimen outside of the test chamber shall be minimized, and if it exceeds 10 % of the overall specimen length, this should be reported. The preparation of the specimen shall have no
31、detrimental effect on the fibre whilst under test conditions. Unless otherwise specified, the fibre sample should be loosely coiled and dusted with a material such as talcum powder, to allow the coils to move freely against each other. The specimen may be coiled horizontally or vertically, with a mi
32、nimum bend diameter of 150 mm to avoid any macrobend effects. A control length of the specimen shall be removed prior to the test to enable the completion of required mechanical measurements for comparison to measurements made after the test. This control length should not be dusted. 5 Procedure 5.1
33、 General The specimen is placed in a chamber and subjected to changes in temperature for a specified duration, as specified in the detail specification. Conduct the procedure in accordance with IEC 60068-2-14, Test Nb, with the following conditions: Description IEC 60068-2-14 nomenclature Nominal va
34、lues Pre-conditioning Pre-conditioning 2 h at 23 C/50 % RH Minimum temperature TA 60 C (see note 1) Maximum temperature TB +85 C (see note 2) Minimum dwell time at each temperature t1 2 h Maximum speed at which to change the temperature Ramp rate 1 C/min Number of complete cycles required Number of
35、cycles 2 NOTE 1 In some regions, -40 C may be acceptable. NOTE 2 In some regions, +70 C may be acceptable. 5.2 Optical measurements Attenuation measurement shall be carried out at the wavelengths specified in the relevant specification using either IEC 60793-1-40:2001, Annex B (insertion loss) or IE
36、C 60793-1-40:2001, Annex C (backscattering) before, during (once the specimen has stabilized at the specified temperature) and after the test. Attenuation changes shall be recorded. Other optical measurements may be required if specified in the relevant product specification. 5.3 Conditioning Stabil
37、ize the chamber and the specimen to standard atmospheric conditions prior to the reference measurements being taken. Adjust the chamber temperature and humidity to the specified severity. The maximum rate of change of temperature shall be 1 C/min, averaged over a maximum period of 5 min. Allow the s
38、pecimen to reach temperature stability and maintain the temperature and humidity for the duration specified. BS EN 60793-1-52:201460793-1-52 IEC:2014 7 At the completion of the test, allow the specimen to remain in the chamber while the temperature is reduced to standard atmospheric conditions. The
39、maximum rate of change of temperature shall be 1 C/min, averaged over a maximum period of 5 min. The detail specification may call for measurements during conditioning. If required, the detail specification shall specify the measurements to be taken and when to take them. Do not remove the specimen(
40、s) from the chamber whilst these measurements are being made. 5.4 Recovery Unless otherwise required by the relevant specification, the specimen shall remain under standard atmospheric condition for recovery for a period greater than 1 h but not more than 24 h. The detail specification may call for
41、measurements during recovery. If required, the detail specification shall specify the measurements to be taken and when to take them. 6 Pass/fail criteria The applicable specification limits can be found in the relevant sectional specification of IEC 60793-2-10 for A1 fibres, IEC 60793-2-50 for B fi
42、bres and IEC 60793-2-60 for C fibres. 7 Results 7.1 Information to be provided with each test date and title of test; identification of specimen; length of specimen; nominal wavelength(s) at which the test was performed; attenuation change. 7.2 Information to be available upon request description of
43、 all key equipment; temperature cycle details. 8 Specification information The detail specification shall specify the following information: values of TAand TB used; pass/fail criteria; information to be reported; any deviations to the procedure that apply. _ BS EN 60793-1-52:2014This page deliberat
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