1、 IEC 61300-2-21 Edition 2.0 2009-12 INTERNATIONAL STANDARD NORME INTERNATIONALE Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-21: Tests Composite temperature/humidity cyclic test Dispositifs dinterconnexion et composants passifs fibres optiqu
2、es Mthodes fondamentales dessais et de mesures Partie 2-21: Essais Essai cyclique composite de temprature et dhumidit IEC 61300-2-21:2009 THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2009 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may b
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17、 Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 2-21: Tests Composite temperature/humidity cyclic test Dispositifs dinterconnexion et composants passifs fibres optiques Mthodes fondamentales dessais et de mesures Partie 2-21: Essais Essai cycliq
18、ue composite de temprature et dhumidit INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE M ICS 33.180.20 PRICE CODE CODE PRIX ISBN 978-2-88912-049-9 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique
19、 Internationale 2 61300-2-21 IEC:2009 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 2-21: Tests Composite temperature/humidity cyclic test FOREWORD 1) The International Electrotechnical Commission (IE
20、C) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in additio
21、n to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
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23、onditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC
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27、y. IEC is not responsible for any services carried out by independent certification bodies. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members o
28、f its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any
29、 other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be
30、 the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 61300-2-21 has been prepared by subcommittee 86B: Fibre optic interconnecting devices and passive components, of IEC technical committee 86: Fibre optics. This b
31、ilingual version (2010-07) replaces the English version. This second edition cancels and replaces the first edition published in 1995. It constitutes a technical revision. The changes with respect to the previous edition are: to reconsider the whole parts of the standard; to describe the apparatus a
32、nd procedure in greater details; to define with precision the number of 24 cycles in the severity. 61300-2-21 IEC:2009 3 The text of this standard is based on the following documents: FDIS Report on voting 86B/2924/FDIS 86B/2961/RVD Full information on the voting for the approval of this standard ca
33、n be found in the report on voting indicated in the above table. The French version of this standard has not been voted upon. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all the parts of IEC 61300 series, under the general title, Fibre optic interco
34、nnecting devices and passive components Basic test and measurement procedures, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the stability date indicated on the IEC web site under “http:/webstore.iec.ch“ in the data relat
35、ed to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended. 4 61300-2-21 IEC:2009 FIBRE OPTIC INTERCONNECTING DEVICES AND PASSIVE COMPONENTS BASIC TEST AND MEASUREMENT PROCEDURES Part 2-21: Tests Composite temperature/humid
36、ity 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, humidity and cold conditions. It is intended to reveal defects in a device under test (DUT) caused by breathing as opposed to absorpt
37、ion 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 vary depending on the size and thermal mass of the DUT. This test differs from other cyclic damp heat tests in that it derives its inc
38、reased 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 of change of temperature; d) the inclusion of a number of excursions to sub-zero temperature. This type of test is particularly impo
39、rtant for fibre optic devices made of a variety of different materials. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced
40、 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, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-1: Examinations and measur
41、ements Visual examination IEC 61300-3-4, Fibre optic interconnecting devices and passive components Basic test and measurement procedures Part 3-4: Examinations and measurements Attenuation 3 General description This procedure is conducted in accordance with IEC 60068-2-38, test Z/AD. The DUT is pla
42、ced 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 humidity subcycle, the DUT shall be subjected to cold. 61300-2-21 IEC:2009 5 4 Apparatus 4.1 General The exposure to moisture, followed by
43、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 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 r
44、ising and falling temperatures. b) The relative humidity can be maintained at 93 % RH 3 % RH during the periods of constant or rising temperature 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 wor
45、king space are uniform and are as similar as possible to those prevailing in the immediate vicinity of suitably located temperature and humidity sensing devices. The air in the chamber shall be continuously stirred at a rate necessary to maintain the specified conditions of temperature and humidity.
46、 d) The DUT shall not be subjected to radiant heat from the chamber conditioning processes. e) Condensed water is continuously drained from the 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
47、 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 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 sim
48、ilar as possible to those prevailing in the immediate vicinity of suitably located temperature-sensing devices. The air in the chamber shall be 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
49、 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 constructed 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 c
