1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationFibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-21: Tests Composite temperature/humidity cyclic testBS EN 61300-2-21: 2010
2、National forewordThis British Standard is the UK implementation of EN 61300-2-21:2010. It isidentical to IEC 61300-2-21:2009. It supersedes BS EN 61300-2 21:1997which is withdrawn.The UK participation in its preparation was entrusted by Technical CommitteeGEL/86, Fibre optics, to Subcommittee GEL/86
3、/2, Fibre optic interconnectingdevices and passive components.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. BS
4、I 2010ISBN 978 0 580 56916 6ICS 33.180.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 March 2010Amendments issued since publicationAmd. No. Date Text affecte
5、dBRITISH STANDARDBS EN 61300-2-21:2010-EUROPEAN STANDARD EN 61300-2-21 NORME EUROPENNE EUROPISCHE NORM February 2010 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: A
6、venue Marnix 17, B - 1000 Brussels 2010 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 61300-2-21:2010 E ICS 33.180.20 Supersedes EN 61300-2-21:1997English version Fibre optic interconnecting devices and passive components - Basi
7、c test and measurement procedures - Part 2-21: Tests - Composite temperature/humidity cyclic test (IEC 61300-2-21:2009) Dispositifs dinterconnexion et composantspassifs fibres optiques Mthodes fondamentales dessais et de mesures Partie 2-21: Essais Essai cyclique composite temprature/humidit (CEI 61
8、300-2-21:2009) Lichtwellenleiter -Verbindungselemente und passive Bauteile - Grundlegende Prf- und Messverfahren - Teil 2-21: Prfungen - kombinierte Temperatur/Feuchte, zyklisch(IEC 61300-2-21:2009) This European Standard was approved by CENELEC on 2010-02-01. CENELEC members are bound to comply wit
9、h 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 Secretari
10、at 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 the o
11、fficial versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Pola
12、nd, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 61300-2-21:2010EN 61300-2-21:2010 - 2 - Foreword The text of document 86B/2924/FDIS, future edition 2 of IEC 61300-2-21, prepared by SC 86B, Fibre optic interconnecting devices and passive components,
13、 of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61300-2-21 on 2010-02-01. This European Standard supersedes EN 61300-2-21:1997. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
14、rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent rights. The changes with respect to EN 61300-2-21:1997 are: to reconsider the whole parts of the standard; to describe the apparatus and procedure in greater details; to define with precision the number of 2
15、4 cycles in the severity. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2010-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (
16、dow) 2011-02-01 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 61300-2-21:2009 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following note has to be added for the standard
17、indicated: IEC 61300-1 NOTE Harmonized as EN 61300-1. _ BS EN 61300-2-21:2010- 3 - EN 61300-2-21:2010 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following referenced documents are indispensable for the application of thi
18、s document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies
19、. Publication Year Title EN/HD Year IEC 60068-2-38 - Environmental testing - Part 2-38: Tests - Test Z/AD: Composite temperature/humidity cyclic test EN 60068-2-38 - IEC 61300-3-1 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-1: Examina
20、tions and measurements - Visual examination EN 61300-3-1 - IEC 61300-3-4 - Fibre optic interconnecting devices and passive components - Basic test and measurement procedures - Part 3-4: Examinations and measurements - Attenuation EN 61300-3-4 - BS EN 61300-2-21:2010 4 61300-2-21 IEC:2009(E) FIBRE OP
21、TIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 2-21: Tests Composite temperature/humidity cyclic test 1 Scope The purpose of this part of IEC 61300 is to determine the resistance of a fibre optic device to the deteriorative effects of high temperature,
22、humidity and cold conditions. It is intended to reveal defects in a device under test (DUT) caused by breathing as opposed to absorption of moisture. The test covers the effect of the freezing of trapped water in cracks and fissures as well as condensation. However, the degree of condensation will v
23、ary depending on the size and thermal mass of the DUT. This test differs from other cyclic damp heat tests in that it derives its increased severity from: a) a greater number of temperature variations leading to pumping actions in a given time; b) a greater cyclic temperature range; c) a higher rate
24、 of change of temperature; d) the inclusion of a number of excursions to sub-zero temperature. This type of test is particularly important for fibre optic devices made of a variety of different materials. 2 Normative references The following referenced documents are indispensable for the application
25、 of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-2-38 Environmental testing Part 2-38: Tests Test Z/AD: Composite temperature/humidity cyclic test IEC 61300-3-1
26、, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-1: Examinations and measurements Visual examination IEC 61300-3-4, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-4: Examinations and mea
27、surements Attenuation 3 General description This procedure is conducted in accordance with IEC 60068-2-38, test Z/AD. The DUT is placed in a humidity chamber and subjected to 10 temperature-humidity cycles, each of 24 h duration. During any five of the first nine cycles after exposure to the humidit
28、y subcycle, the DUT shall be subjected to cold. BS EN 61300-2-21:201061300-2-21 IEC:2009(E) 5 4 Apparatus 4.1 General The exposure to moisture, followed by cold, can either be performed in one chamber or in two separate chambers. 4.2 Chamber for the exposure to moisture The chamber for the exposure
29、to moisture shall be so constructed that: a) The temperature can be varied between 25 C 2 C and 65 C 2 C in a period of between 1 h 30 and 2 h 30 for both rising and falling temperatures. b) The relative humidity can be maintained at 93 % RH 3 % RH during the periods of constant or rising temperatur
30、e and between 88 % RH 8 % RH during the falling temperature periods. c) Care shall be taken to ensure that the conditions prevailing at any point in the working space are uniform and are as similar as possible to those prevailing in the immediate vicinity of suitably located temperature and humidity
31、 sensing devices. The air in the chamber shall be continuously stirred at a rate necessary to maintain the specified conditions of temperature and humidity. d) The DUT shall not be subjected to radiant heat from the chamber conditioning processes. e) Condensed water is continuously drained from the
32、chamber and not used again until it has been repurified. f) Precautions shall be taken to ensure that no condensed water from the walls and roof of the test chamber can fall on the DUT. 4.3 Chamber for exposure to cold The chamber for exposure to cold shall be so constructed that: a) The temperature
33、 can be maintained at 10 C 2 C. b) Care shall be taken to ensure that the conditions prevailing at any point in the working space are uniform and are as similar as possible to those prevailing in the immediate vicinity of suitably located temperature-sensing devices. The air in the chamber shall be
34、continuously stirred. c) Care shall be taken that the thermal capacity of the DUT does not appreciably influence conditions within the chamber. 4.4 Humidity chamber The humidity chamber may be used for exposure to cold in which case it shall meet the requirements of 4.2 and in addition shall be so c
35、onstructed that: a) The temperature can be lowered from 25 C 2 C to 10 C 2 C in a period of not more than 30 min. b) The DUT can be held at a temperature of 10 C 2 C for a period of 3 h. c) The temperature can be raised from 10 C 2 C to 25 C 2 C in a period of not more than 90 min. 4.5 Optical sourc
36、e and detector The optical source and detector used to measure changes in attenuation shall comply with those specified in IEC 61300-3-4. BS EN 61300-2-21:2010 6 61300-2-21 IEC:2009(E) 5 Procedure 5.1 Preparation of specimens Prepare the specimen according to the manufacturers instructions or as spe
37、cified in the relevant specification. The specimen shall be terminated with a sufficient length of fibre cable to facilitate connection with the optical source and the detector. Clean the optical and mechanical parts of the DUT according to the manufacturers instructions. 5.2 Pre-conditioning (see F
38、igure 1) Unless otherwise specified, the DUT, switched off, ready for-use-state, shall be subjected to 55 C 2 C with a relative humidity not exceeding 20 % RH for a period of 24 h prior to the conditioning. The DUT shall then be allowed to attain thermal stability at standard atmospheric conditions
39、for testing or as otherwise specified before the initial measurements are made. BS EN 61300-2-21:201061300-2-21 IEC:2009(E) 7 100 90 80 70 60 50 40 30 20 10 0 0 12 24 Time (h) Relative humidity not more than 20 % 60 57 53 50 40 30 20 10 0 0 12 24 Time (h) Relativehumidity(%)Temperature (C) Pre-condi
40、tioning period Drying period Stabilizing period Initial measurements No specific rate of cooling is required IEC 2406/09 IEC 2405/09 Figure 1 Preconditioning BS EN 61300-2-21:2010 8 61300-2-21 IEC:2009(E) 5.3 Initial measurements The DUT shall be visually inspected and optically measured and mechani
41、cally checked as required by the relevant specification. 5.4 Conditioning 5.4.1 General The DUT shall be introduced into the humidity chamber, switched off, ready-for-use state, and mounted in the normal orientation, if this is known, or as otherwise specified and shall be subjected to 10 temperatur
42、e/humidity cycles, each of 24 h duration. During any five of the first nine of the above cycles after exposure to the humidity subcycle (a-f in Figure 2), the DUT shall be subjected to cold. This exposure may be performed either in the same chamber or in separate chambers. If separate chambers are u
43、sed for the high-temperature/high-humidity and low-temperature sub-cycles of the test, the DUT should not be subjected to thermal shock conditions unless it is known that they are insensitive to this degree of thermal shock. If a batch of DUT is subjected to thermal shock through the use of the two
44、chamber methods and significant failures occur, a further batch shall be retested with gradual change of temperatures and shall be considered to have passed the test successfully if no significant failures occur under these conditions. The remaining four of the first nine cycles shall be run without
45、 exposure to cold (see 5.4.2.1.). The humidity cycles prescribed are the same in all cases. 5.4.2 Description of 24 h cycle 5.4.2.1 Description of temperature/humidity subcycle (applicable to all cycles, see Figure 2) At “zero time” of every 24 h cycle, the chamber condition shall be controlled to a
46、 temperature of 25 C 2 C and relative humidity of 93 % RH 3 % RH. a) The temperature of the chamber shall be steadily raised to 65 C 2 C over a period of 2 h 30 min. During this period, the relative humidity shall be maintained at 93 % RH 3 % RH. b) The temperature and relative humidity in the chamb
47、er shall be maintained at 65 C 2 C and 93 % RH 3 % RH respectively until 5 h 30 after the start of the cycle. c) The temperature shall then be allowed to fall to 25 C 2 C over a period of 2 h 30 min . During this period, the relative humidity shall be maintained at 88 % RH 8 % RH. d) Beginning 8 h a
48、fter the start of the cycle, the temperature shall again be steadily raised to 65 C 2 C over a period of 2 h 30 min. During this period, the relative humidity shall be maintained at 93 % RH 3 % RH. e) The temperature and relative humidity in the chamber shall be maintained at 65 C 2 C and 93 % RH 3
49、% RH respectively until 13 h 30 after the start of the cycle. f) The temperature shall then be allowed to fall to 25 C 2 C over a period of 2 h 30 min. During this period, the relative humidity in the chamber shall be maintained at 88 % RH 8 % RH. g) The chamber shall then continue to run at a stabilised temperature of 25 C 2 C and relative humidity of 93 % RH 3
