IEC 60068-2-14-2009 环境试验 第2-14部分试验 试验N温度变

IEC 60068-2-14 Edition 6.0 2009-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Environmental testing – Part 2-14: Tests – Test N: Change of temperature Essais d’environnement – Partie 2-14: Essais – Essai N: Variation de température IE C 6 00 68 -2 -1 4: 20 09 BASIC SAFETY PUBLICATION PUBLICATION FONDAMENTALE DE SÉCURITÉ Copyright International Electrotechnical Commission Provided by IHS under license with IEC Not for ResaleNo reproduction or networking permitted without license from IHS - - ` , , ` ` ` , , , , ` ` ` ` - ` - ` , , ` , , ` , ` , , ` - - - http://www.infoeach.com http://bbs.infoeach.com http://www.infoeach.com http://bbs.infoeach.com THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright © 2009 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or your local IEC member National Committee for further information. Droits de reproduction réservés. Sauf indication contraire, aucune partie de cette publication ne peut être reproduite ni utilisée sous quelque forme que ce soit et par aucun procédé, électronique ou mécanique, y compris la photocopie et les microfilms, sans l'accord écrit de la CEI ou du Comité national de la CEI du pays du demandeur. Si vous avez des questions sur le copyright de la CEI ou si vous désirez obtenir des droits supplémentaires sur cette publication, utilisez les coordonnées ci-après ou contactez le Comité national de la CEI de votre pays de résidence. IEC Central Office 3, rue de Varembé CH-1211 Geneva 20 Switzerland Email: inmail@iec.ch Web: www.iec.ch About the IEC The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes International Standards for all electrical, electronic and related technologies. About IEC publications The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the latest edition, a corrigenda or an amendment might have been published. ƒ Catalogue of IEC publications: www.iec.ch/searchpub The IEC on-line Catalogue enables you to search by a variety of criteria (reference number, text, technical committee,…). It also gives information on projects, withdrawn and replaced publications. ƒ IEC Just Published: www.iec.ch/online_news/justpub Stay up to date on all new IEC publications. Just Published details twice a month all new publications released. Available on-line and also by email. ƒ Electropedia: www.electropedia.org The world's leading online dictionary of electronic and electrical terms containing more than 20 000 terms and definitions in English and French, with equivalent terms in additional languages. Also known as the International Electrotechnical Vocabulary online. ƒ Customer Service Centre: www.iec.ch/webstore/custserv If you wish to give us your feedback on this publication or need further assistance, please visit the Customer Service Centre FAQ or contact us: Email: csc@iec.ch Tel.: +41 22 919 02 11 Fax: +41 22 919 03 00 A propos de la CEI La Commission Electrotechnique Internationale (CEI) est la première organisation mondiale qui élabore et publie des normes internationales pour tout ce qui a trait à l'électricité, à l'électronique et aux technologies apparentées. A propos des publications CEI Le contenu technique des publications de la CEI est constamment revu. Veuillez vous assurer que vous possédez l’édition la plus récente, un corrigendum ou amendement peut avoir été publié. ƒ Catalogue des publications de la CEI: www.iec.ch/searchpub/cur_fut-f.htm Le Catalogue en-ligne de la CEI vous permet d’effectuer des recherches en utilisant différents critères (numéro de référence, texte, comité d’études,…). Il donne aussi des informations sur les projets et les publications retirées ou remplacées. ƒ Just Published CEI: www.iec.ch/online_news/justpub Restez informé sur les nouvelles publications de la CEI. Just Published détaille deux fois par mois les nouvelles publications parues. Disponible en-ligne et aussi par email. ƒ Electropedia: www.electropedia.org Le premier dictionnaire en ligne au monde de termes électroniques et électriques. Il contient plus de 20 000 termes et définitions en anglais et en français, ainsi que les termes équivalents dans les langues additionnelles. Egalement appelé Vocabulaire Electrotechnique International en ligne. ƒ Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm Si vous désirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du Service clients ou contactez-nous: Email: csc@iec.ch Tél.: +41 22 919 02 11 Fax: +41 22 919 03 00 Copyright International Electrotechnical Commission Provided by IHS under license with IEC Not for ResaleNo reproduction or networking permitted without license from IHS --`,,```,,,,````-`-`,,`,,`,`,,`--- http://www.infoeach.com http://bbs.infoeach.com http://www.infoeach.com http://bbs.infoeach.com IEC 60068-2-14 Edition 6.0 2009-01 INTERNATIONAL STANDARD NORME INTERNATIONALE Environmental testing – Part 2-14: Tests – Test N: Change of temperature Essais d’environnement – Partie 2-14: Essais – Essai N: Variation de température INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE R ICS 19.040 PRICE CODE CODE PRIX ISBN 2-8318-1022-7 BASIC SAFETY PUBLICATION PUBLICATION FONDAMENTALE DE SÉCURITÉ ® Registered trademark of the International Electrotechnical Commission Marque déposée de la Commission Electrotechnique Internationale Copyright International Electrotechnical Commission Provided by IHS under license with IEC Not for ResaleNo reproduction or networking permitted without license from IHS - - ` , , ` ` ` , , , , ` ` ` ` - ` - ` , , ` , , ` , ` , , ` - - - http://www.infoeach.com http://bbs.infoeach.com http://www.infoeach.com http://bbs.infoeach.com – 2 – 60068-2-14 © IEC:2009 CONTENTS FOREWORD...........................................................................................................................4 INTRODUCTION.....................................................................................................................6 1 Scope...............................................................................................................................7 2 Normative references .......................................................................................................7 3 Field conditions of changing temperature .........................................................................7 4 General ............................................................................................................................8 4.1 Design of change of temperature tests ....................................................................8 4.2 Test parameters ......................................................................................................8 4.3 Purpose and choice of the tests ..............................................................................8 4.4 Choice of the duration of the exposure ....................................................................8 4.5 Choice of the duration of the transfer time ...............................................................9 4.6 Applicability limits of change of temperature tests ...................................................9 5 Guidance for the selection of the kind of test .................................................................. 10 6 Initial and final measurements ........................................................................................ 10 6.1 Initial measurements ............................................................................................. 10 6.2 Final measurements ..............................................................................................10 7 Test Na: Rapid change of temperature with prescribed time of transfer .......................... 10 7.1 General description of the test............................................................................... 10 7.2 Testing procedure .................................................................................................10 7.2.1 Testing chamber ........................................................................................ 10 7.2.2 Mounting or supporting of the test specimen.............................................. 11 7.2.3 Severities ..................................................................................................11 7.2.4 Conditioning ..............................................................................................11 7.2.5 Test cycle ..................................................................................................11 7.3 Recovery...............................................................................................................12 7.4 Information to be given in the relevant specification .............................................. 12 8 Test Nb: Change of temperature with specified rate of change ....................................... 13 8.1 General description of the test............................................................................... 13 8.2 Testing procedure .................................................................................................13 8.2.1 Testing chamber ........................................................................................ 13 8.2.2 Mounting or supporting of the test specimen.............................................. 13 8.2.3 Severities ..................................................................................................13 8.2.4 Conditioning ..............................................................................................14 8.2.5 Test cycle ..................................................................................................14 8.3 Recovery...............................................................................................................15 8.4 Information to be given in the relevant specification .............................................. 15 9 Test Nc: Rapid change of temperature, two-fluid-bath method ........................................ 16 9.1 General description of the test............................................................................... 16 9.2 Testing procedure .................................................................................................16 9.2.1 Testing equipment .....................................................................................16 9.2.2 Severities ..................................................................................................16 9.2.3 Conditioning ..............................................................................................16 9.3 Test cycle..............................................................................................................16 9.4 Recovery...............................................................................................................17 9.5 Information to be given in the relevant specification .............................................. 17 Copyright International Electrotechnical Commission Provided by IHS under license with IEC Not for ResaleNo reproduction or networking permitted without license from IHS - - ` , , ` ` ` , , , , ` ` ` ` - ` - ` , , ` , , ` , ` , , ` - - - http://www.infoeach.com http://bbs.infoeach.com http://www.infoeach.com http://bbs.infoeach.com 60068-2-14 © IEC:2009 – 3 – 10 Information to be given in the test report ........................................................................ 18 Figure 1 – Determination of test duration time (t1)...................................................................9 Figure 2 – Na test cycle ........................................................................................................ 12 Figure 3 – Nb test cycle ........................................................................................................ 15 Figure 4 – Nc test cycle ........................................................................................................ 17 Copyright International Electrotechnical Commission Provided by IHS under license with IEC Not for ResaleNo reproduction or networking permitted without license from IHS - - ` , , ` ` ` , , , , ` ` ` ` - ` - ` , , ` , , ` , ` , , ` - - - http://www.infoeach.com http://bbs.infoeach.com http://www.infoeach.com http://bbs.infoeach.com – 4 – 60068-2-14 © IEC:2009 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________ ENVIRONMENTAL TESTING – Part 2-14: Tests – Test N: Change of temperature FOREWORD 1) The International Electrotechnical Commission (IEC) 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 addition 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 in the subject dealt with may participate in this preparatory work. International, governmental and non- governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions 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 National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 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 of 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 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 the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60068-2-14 has been prepared by IEC technical committee 104: Environmental conditions, classification and methods of test. This sixth edition cancels and replaces the fifth edition, published in 1984, and its amendment 1 (1986) and constitutes a technical revision. The major changes with regard to the previous edition concern: • merging of the previous version of IEC 60068-2-14 with IEC 60068-2-33: Guidance on change of temperature tests; • updating of the figures, changes to some of the wording and editorial corrections made for clarification. Copyright International Electrotechnical Commission Provided by IHS under license with IEC Not for ResaleNo reproduction or networking permitted without license from IHS --`,,```,,,,````-`-`,,`,,`,`,,`--- http://www.infoeach.com http://bbs.infoeach.com http://www.infoeach.com http://bbs.infoeach.com 60068-2-14 © IEC:2009 – 5 – The text of this standard is based on the following documents: FDIS Report on voting 104/481/FDIS 104/486/RVD Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. It has the status of a basic safety publication in accordance with IEC Guide 104. A list of all the parts in the IEC 60068 series, under the general title Environmental testing, can be found on the IEC website. The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be • reconfirmed, • withdrawn, • replaced by a revised edition, or • amended. Copyright International Electrotechnical Commission Provided by IHS under license with IEC Not for ResaleNo reproduction or networking permitted without license from IHS --`,,```,,,,````-`-`,,`,,`,`,,`--- http://www.infoeach.com http://bbs.infoeach.com http://www.infoeach.com http://bbs.infoeach.com – 6 – 60068-2-14 © IEC:2009 INTRODUCTION A change of temperature test is intended to determine the effect on the specimen of a change of temperature or a succession of changes of temperature. It is not intended to show effects which are due only to high or low temperatures. For these effects, the dry heat test or the cold test should be used. The effect of such tests is determined by – values of high and low conditioning temperature between which the change is to be effected, – the conditioning times for which the test specimen is kept at these temperatures, – the rate of change between these temperatures, – the number of cycles of conditioning, – the amount of heat transfer into or from the specimen. Guidance on the choice of suitable test parameters for inclusion in the detail specification is given throughout this standard. Copyright International Electrotechnical Commission Provided by IHS under license with IEC Not for ResaleNo reproduction or networking permitted without license from IHS --`,,```,,,,````-`-`,,`,,`,`,,`--- http://www.infoeach.com http://bbs.infoeach.com http://www.infoeach.com http://bbs.infoeach.com 60068-2-14 © IEC:2009 – 7 – ENVIRONMENTAL TESTING – Part 2-14: Tests – Test N: Change of temperature 1 Scope This part of IEC 60068 provides a test to determine the ability of