1、BSI Standards PublicationEnvironmental testingPart 2-39: Tests Tests and guidance: Combined temperature or temperature and humidity with low air pressure testsBS EN 60068-2-39:2016National forewordThis British Standard is the UK implementation of EN 60068-2-39:2016. It is identical to IEC 60068-2-39
2、:2015. It supersedes BS EN 60068-2-39:1999which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee GEL/104, Environmental conditions, classification and testing.A list of organizations represented on this committee can be obtained onrequest to its secretary.This
3、 publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 77133 0ICS 19.040Compliance with a British Standard cannot confer immuni
4、ty fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 29 February 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 60068-2-39:2016EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN
5、 60068-2-39 January 2016 ICS 19.040 Supersedes EN 60068-2-39:1999 English Version Environmental testing - Part 2-39: Tests - Tests and guidance: Combined temperature or temperature and humidity with low air pressure tests (IEC 60068-2-39:2015) Essais denvironnement - Partie 2-39: Essais - Essais et
6、lignes directrices: Essais combins de temprature ou de temprature et dhumidit basse pression atmosphrique (IEC 60068-2-39:2015) Umgebungseinflsse - Teil 2-39: Prfverfahren - Prfungen und Leitfaden: Kombinierte Prfung der Temperatur oder Temperatur und Feuchte mit niedrigem Luftdruck (IEC 60068-2-39:
7、2015) This European Standard was approved by CENELEC on 2015-10-21. CENELEC members are bound to comply 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 bibliograp
8、hical 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, French, German). A version in any other language made by translation under the responsi
9、bility 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 Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland,
10、 Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrote
11、chnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref.
12、No. EN 60068-2-39:2016 E BS EN 60068-2-39:2016EN 60068-2-39:2016 2 European foreword The text of document 104/657/FDIS, future edition 2 of IEC 60068-2-39, prepared by IEC/TC 104 “Environmental conditions, classification and methods of test“ was submitted to the IEC-CENELEC parallel vote and approve
13、d by CENELEC as EN 60068-2-39:2016. 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) 2016-07-22 latest date by which the national standards conflicting with the document h
14、ave to be withdrawn (dow) 2019-01-22 This document supersedes EN 60068-2-39:1999. 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 all such patent rights. Endo
15、rsement notice The text of the International Standard IEC 60068-2-39:2015 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60068-2 (series) NOTE Harmonized as EN 6
16、0068-2 (series). IEC 60068-2-1 NOTE Harmonized as EN 60068-2-1. IEC 60068-2-2 NOTE Harmonized as EN 60068-2-2. IEC 60068-2-13 NOTE Harmonized as EN 60068-2-13. IEC 60068-3-1 NOTE Harmonized as EN 60068-3-1. BS EN 60068-2-39:2016EN 60068-2-39:2016 3 Annex ZA (normative) Normative references to intern
17、ational publications with their 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
18、 the referenced document (including 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 avai
19、lable here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 60068-1 - Environmental testing - Part 1: General and guidance EN 60068-1 - IEC 60068-2-78 - Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady state EN 60068-2-78 - BS EN 60068-2-39:2016 2 IEC 60068-2-39:2015 IEC
20、2015 CONTENTS FOREWORD . 3 INTRODUCTION . 5 1 Scope and object . 6 2 Normative references 6 3 Terms and definitions 6 4 Testing 6 4.1 General . 6 4.2 Preferred combinations . 6 4.3 Initial measurement and functional performance test . 7 4.4 Test procedure 7 4.4.1 Preconditioning 7 4.4.2 Test with te
21、mperature and low air pressure 7 4.4.3 Test with temperature, humidity and low air pressure . 9 5 Final measurements 12 6 Information to be given in the relevant specification . 12 7 Information to be given in the test report 12 Annex A (informative) Guidance on combined temperature or temperature a
22、nd humidity with low air pressure testing 14 A.1 General . 14 A.2 Environmental effects . 14 A.3 Measurement of temperature 14 Bibliography 16 Figure 1 Example of test sequence with cold temperature and low air pressure . 8 Figure 2 Example of test sequence with dry heat and low air pressure . 9 Fig
23、ure 3 Example of test sequence of temperature and humidity with low air pressure . 11 Table 1 Test severities . 7 BS EN 60068-2-39:2016IEC 60068-2-39:2015 IEC 2015 3 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ENVIRONMENTAL TESTING Part 2-39: Tests Tests and guidance: Combined temperature or tempera
24、ture and humidity with low air pressure tests 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 a
25、ll 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 Publ
26、ication(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. I
27、EC 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 o
28、pinion 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 t
29、o 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 transparen
30、tly 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 itself does not provide any attestation of conformity. Independent certif
31、ication bodies provide conformity assessment services and, in some areas, access to IEC marks of conformity. 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 shal
32、l 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 lega
33、l 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 publ
34、ication. 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 60068-2-39 has been prepared by IEC technical committee
35、 104: Environmental conditions, classification and methods of test. This second edition cancels and replaces the first edition published in 1976 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) preferred
36、severities of the IEC 60068 series; b) combined temperature, humidity and low air pressure BS EN 60068-2-39:2016 4 IEC 60068-2-39:2015 IEC 2015 The text of this standard is based on the following documents: FDIS Report on voting 104/657/FDIS 104/661/RVD Full information on the voting for the approva
37、l 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. A list of all parts in the IEC 60068 series, published under the general title Environmental testing, can be found on the IEC web
38、site. 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 related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by
39、a revised edition, or amended. BS EN 60068-2-39:2016IEC 60068-2-39:2015 IEC 2015 5 INTRODUCTION Equipment and components are required to function without significant reduction in performance when subjected to different environmental parameters. The combination of temperature, humidity and low air pr
40、essure may have certain effects on components and gaskets, for example. The type and severity of the environmental parameters depend on the operational, transport and storage environments to which the equipment and components are subjected. The environmental effects on the performance of equipment i
41、n the tropics and subtropics are totally different from those in arctic regions. Individual environmental parameters cause a variety of different and overlapping effects on the equipment and components. The manufacturer attempts to ensure, and the user expects, that equipment and components will sur
42、vive the environments to which they will be subjected throughout their useful life. This expectation can be assessed by exposure of the specimen to a range of simulated environmental parameters controlled in the laboratory. The severity of the environmental parameters is often increased to obtain me
43、aningful results in a relatively short period of time. This allows assessment of the likely effects of applied environmental conditions. BS EN 60068-2-39:2016 6 IEC 60068-2-39:2015 IEC 2015 ENVIRONMENTAL TESTING Part 2-39: Tests Tests and guidance: Combined temperature or temperature and humidity wi
44、th low air pressure tests 1 Scope and object This part of IEC 60068 provides a description of test methods and guidance for testing of equipment or components under combined temperature or temperature and humidity with low air pressure tests. The object of combined testing is to investigate to what
45、extent the equipment or components are affected by combined temperature or temperature and humidity with low air pressure tests. The method of combined tests detects electrical, mechanical or other physical variations. 2 Normative references The following documents, in whole or in part, are normativ
46、ely 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 (including any amendments) applies. IEC 60068-1, Environmental testing Part 1: General and guidance I
47、EC 60068-2-78, Environmental testing Part 2-78: Tests Test Cab: Damp heat, steady state 3 Terms and definitions None. 4 Testing 4.1 General All values of test parameters such as cold, dry heat, low air pressure, humidity, exposure time and conditions such as state of operation and so on, should be s
48、elected from the IEC 60068-2 series or the relevant specification. The duration of exposure shall be measured from the time when temperature stability of the specimen has been reached under conditions of low air pressure. Temperature stability shall be according to IEC 60068-1. It should preferably
49、be tested with low air velocity. 4.2 Preferred combinations Preferred combinations of temperature, low air pressure and duration shall be selected from Table 1. BS EN 60068-2-39:2016IEC 60068-2-39:2015 IEC 2015 7 Table 1 Test severities Temperature Low air pressure Duration C kPa h 55 5 2 55 15 2 55 25 2 55 40 2 40 55 2 or 16 40 70 2 or 16 25 55 2 or 16 40 55 2 55 15 2 55 25 2 55 40 2 55 55 2 or 16 55 70 2 or 16 85 5 2 85 15 2 155 5 2 155 15 2 4.3 Initial measu
