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1、BRITISH STANDARD BS EN 61300-2-20: 1997 IEC 61300-2-20: 1995 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2.20: Tests Climatic sequence The European Standard EN 61300-2-20:1997 has the status of a British Standard ICS 33.180.20 Licensed Copy:
2、sheffieldun sheffieldun, na, Sat Nov 11 12:36:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61300-2-20:1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15
3、 October 1997 BSI 09-1999 ISBN 0 580 28535 9 National foreword This British Standard is the English language version of EN 61300-2-20:1997. It is identical with IEC 61300-2-20:1995. The UK participation in its preparation was entrusted by Technical Committee EPL/86, Fibre optics, to Subcommittee EPL
4、/86/2, Interconnecting devices and passive components, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related
5、international and European developments and promulgate them in the UK. A list of organizations represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumb
6、ered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references t
7、o international publications with their corresponding European publications. The British Standards which implement these international European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” f
8、acility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obl
9、igations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on th
10、e inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:36:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 61300-2-20:1997 BSI 09-1999i Contents Page National forewordInside front cover Foreword2 Text of EN 61300-2-
11、203 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:36:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:36:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 61300-2-20 August 19
12、97 ICS 33.180.20 English version Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-20: Tests Climatic sequence (IEC 61300-2-20:1995) Dispositifs dinterconnexion et composants passifs fibres optiques Mthodes fondamentales dessais et de mesures Par
13、tie 2-20: Essais Squence climatique (CEI 61300-2-20:1995) Lichtwellenleiter Verbindungselemente und passive Bauteile Grundlegende Prf- und Meverfahren Teil 2-20: Prfungen: Klimafolge (IEC 61300-2-20:1995) This European Standard was approved by CENELEC on 1997-07-01. CENELEC members are bound to comp
14、ly with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard 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 Central Sec
15、retariat or to any CENELEC member. This European Standard exists in three official versions (English, 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 Central Secretariat has the same status as
16、 the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Elect
17、rotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No.
18、EN 61300-2-20:1997 E Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:36:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61300-2-20:1997 BSI 09-1999 2 Foreword The text of the International Standard IEC 61300-2-20:1995, prepared by SC 86B, Fibre optic interconnecting devices and passive co
19、mponents, of IEC TC 86, Fibre optics, was submitted to the formal vote and was approved by CENELEC as EN 61300-2-20 on 1997-07-01 without any modification. The following dates were fixed: Annexes designated “normative” are part of the body of the standard. In this standard, Annex ZA is normative. An
20、nex ZA has been added by CENELEC. Endorsement notice The text of the International Standard IEC 61300-2-20:1995 was approved by CENELEC as a European Standard without any modification. Contents Page Foreword2 1General3 2Apparatus3 3Procedure3 4Severity4 5Details to be specified4 Annex ZA (normative)
21、 Normative references to international publications with their corresponding European publications6 latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1998-06-01 latest date by which the national standards confl
22、icting with the EN have to be withdrawn(dow) 1998-06-01 Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:36:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61300-2-20:1997 BSI 09-19993 1 General 1.1 Scope and object The purpose of this part of IEC 1300 is to determine the suitability of a
23、fibre optic device to withstand standard climatic sequences consisting of sequential applications of dry heat, damp heat, cold and low air pressure. These conditions may occur in actual use, storage and/or transportation. 1.2 General description The climatic sequence is based on the standard climati
24、c sequence defined in clause 7 of IEC 68-1 and is applicable to fibre optic devices with climatic categories of 4, 10, 21 and 56 days of damp heat. The climatic sequence shall be carried out in accordance with the procedures and severities specified in the detail specification. This process describe
25、s a climatic sequence in which components are exposed to a number of climatic conditioning tests in a fixed order. There are three methods. 1.2.1 Method 1 Method 1 consists of first exposing the specimen to high temperatures and then to a cycle of damp heat at 55 C. The damp heat is immediately foll
26、owed by a cold test so that any water which has entered the specimen at surface cracks will be frozen and cause further damage. Low air pressure completes the check on the sealing of the specimen. 1.2.2 Method 2 Method 2 entails a more severe conditioning which interposes a cold test between each of
27、 the damp heat cycles. 1.2.3 Method 3 Method 3 entails a short climatic sequence intended for lot-by-lot inspection. Climatic sequence is normally used after environmental tests such as vibration or bump to verify that the specimen has not been cracked or damaged by the environment. 1.3 Normative re
28、ferences The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 1300. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements based on this
29、 part of IEC 1300 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 68-1:1988, Environmental testing Part 1: General and guidance. IE
30、C 68-2-1:1990, Environmental testing Part 2: Tests Tests A: Cold. Amendment 1 (1993) IEC 68-2-2:1974, Environmental testing Part 2: Tests Tests B: Dry heat. Amendment 1 (1993) IEC 68-2-13:1983, Environmental testing Part 2: Tests Test M: Low air pressure. IEC 68-2-30:1980, Environmental testing Part
31、 2: Tests Test Db and guidance: Damp heat, cyclic (12 + 12-hour cycle). Amendment 1 (1985) IEC 68-2-61:1991, Test Z/ABDM: Climatic sequence. 2 Apparatus The apparatus used in this sequence consists of a suitable environmental chamber or chambers in accordance with the primary procedures for dry heat
32、, damp heat, cold and low air pressure tests. 3 Procedure 3.1 Method 1 3.1.1 The specimen shall be subjected to IEC 68-2-2, test Ba, for the specified duration, at the upper category temperature or at the temperature prescribed in the detail specification NOTEWhere prescribed in the detail specifica
33、tion, measurements may be made on the specimen while at the high temperature. 3.1.2 Visually examine the specimen. 3.1.3 An interval not exceeding 72 h is permitted at this stage of the procedure; during the interval, the specimen shall be kept under standard laboratory ambient conditions. 3.1.4 Any
34、 specimen with a climatic category -/-/4 or -/-/10 or -/-/21 or -/-/56 shall be subjected to test Db, severity b), variant 1 of IEC 68-2-30 for one cycle of 24 h followed by a recovery period of 1,5 h to 2 h. 3.1.5 Immediately after the damp heat cycle of 3.1.4, the specimen shall be subjected to IE
35、C 68-2-1, test Aa, for a period of 2 h at the lower category temperature or at the temperature specified in the detail specification. NOTEWhere prescribed in the detail specification, measurements may be made on the specimen while at the low temperature. 3.1.6 An interval not exceeding 72 h is permi
36、tted at this stage of the procedure. During the interval, the specimen shall be kept under standard laboratory ambient conditions. Licensed Copy: sheffieldun sheffieldun, na, Sat Nov 11 12:36:32 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 61300-2-20:1997 4 BSI 09-1999 3.1.7 The specimen shall then
37、 be subjected to IEC 68-2-13, test M, using the degree of severity specified in the detail specification. The low pressure conditioning shall be carried out at standard laboratory ambient conditions for 1 h unless otherwise specified in the detail specification. 3.1.8 An interval not exceeding 72 h
38、is permitted at this stage of the procedure. During the interval, the specimen shall be kept under standard laboratory ambient conditions. 3.1.9 The specimen shall then be subjected to IEC 68-2-30, test Db, for the following number of cycles: 3.1.10 Where specified in the detail specification, the s
39、pecimen shall be removed from the chamber after the specified number of cycles, shaken so as to remove droplets of water and, within 15 min, shall be subjected to the specified optical and mechanical tests. 3.1.11 The specimen shall be allowed to recover for 1,5 h to 2 h under standard conditions fo
40、r recovery. 3.1.12 The specimen shall be visually examined and shall be optically and mechanically checked as prescribed in the detail specification. 3.1.13 Where extended recovery is prescribed in the detail specification, the specimen shall remain under standard atmospheric conditions for recovery
41、 for a further period of 24 h. At the end of this period, the specimen shall be visually examined and shall be subjected to the attenuation measurement as specified by the detail specification and shall meet the requirements therein. 3.2 Method 2 3.2.1 This method shall be applied to specimens of ca
42、tegory -/-/56 when required in the detail specification. 3.2.2 The specimen shall be subjected to the requirements of 3.1.1 through 3.1.8 of method 1. 3.2.3 The specimen shall then be subjected to IEC 68-2-30, test Db, for one cycle of 24 h followed by the recovery period of 1 h to 2 h. 3.2.4 Immedi
43、ately after the damp heat cycle of 3.2.3, the specimen shall be subjected to IEC 68-2-1, test Aa, for a period of 2 h at the lower category temperature or at the temperature specified in the detail specification. 3.2.5 The specimen shall be subjected three times to the procedure described in 3.2.3 a
44、nd 3.2.4, followed by 3.2.3 (once). Where the length of time taken for this series of cycles makes it necessary to interrupt the procedure, one interval not exceeding 72 h is permitted in the procedure. Any such interruption shall occur between a cold cycle and the following damp heat cycle. 3.2.6 W
45、here prescribed in the detail specification, the specimen shall then be removed from the chamber, shaken so as to remove droplets of water, and within 15 min shall be subjected to the prescribed optical and mechanical tests. 3.2.7 The specimen shall be visually examined and shall be optically and me
46、chanically checked as specified in the detail specification. The specimen shall remain under standard conditions for recovery for a further period of 24 h. 3.2.8 At the end of the period, the specimen shall be visually examined and shall be subjected to the attenuation measurement as specified by th
47、e detail specification and shall meet the requirements therein. 3.3 Method 3 Method 3 is the same as method 1 except that: a) there shall be no requirement for visual inspection after the dry heat conditioning in 3.1.1 of method 1; b) the low-pressure conditioning in 3.1.7 of method 1 for test M sha
48、ll be applied only where specified by the detail specification; c) in the second application of cyclic damp heat conditioning in 3.1.9 of method 1 for test Db, severity b), variant 1 of IEC 68-2-30, the specimen shall be subjected to only one cycle. 4 Severity The severity consists of the combinatio
49、n of the dry heat temperature/duration, the damp heat temperature/duration, the cold temperature/duration and the low air pressure/duration. Methods 1, 2 and 3 have preferred severities within the primary procedures. 5 Details to be specified The following details, as applicable, shall be specified in the detail specification: Method Specimen optically functioning or non-functioning Specimen mated or unmated Pre-conditioning procedure CategoryCycles -/-/565 -/-/211 -/-/10not applicable -/-/ 4not applicable Licensed C