IEC 60068-2-2-2007 Environmental testing - Part 2-2 Tests - Test B Dry heat《环境测试.第2-2部分 试验.试验B 干热》.pdf
《IEC 60068-2-2-2007 Environmental testing - Part 2-2 Tests - Test B Dry heat《环境测试.第2-2部分 试验.试验B 干热》.pdf》由会员分享,可在线阅读,更多相关《IEC 60068-2-2-2007 Environmental testing - Part 2-2 Tests - Test B Dry heat《环境测试.第2-2部分 试验.试验B 干热》.pdf(32页珍藏版)》请在麦多课文档分享上搜索。
1、 INTERNATIONAL STANDARD IECCEINORME INTERNATIONALE60068-2-2Fifth editionCinquime dition2007-07Environmental testing Part 2-2: Tests Test B: Dry heat Essais denvironnement Partie 2-2: Essais Essai B: Chaleur sche Reference number Numro de rfrence IEC/CEI 60068-2-2:2007 BASIC SAFETY PUBLICATION PUBLIC
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13、Just Published dtaille deux fois par mois les nouvelles publications parues. Disponible en-ligne et aussi par email. Service Clients: www.iec.ch/webstore/custserv/custserv_entry-f.htm Si vous dsirez nous donner des commentaires sur cette publication ou si vous avez des questions, visitez le FAQ du S
14、ervice clients ou contactez-nous: Email: csciec.ch Tl.: +41 22 919 02 11 Fax: +41 22 919 03 00 INTERNATIONAL STANDARD IECCEINORME INTERNATIONALE60068-2-2Fifth editionCinquime dition2007-07Environmental testing Part 2-2: Tests Test B: Dry heat Essais denvironnement Partie 2-2: Essais Essai B: Chaleur
15、 sche N Commission Electrotechnique InternationaleInternational Electrotechnical Commission PRICE CODE CODE PRIX For price, see current cataloguePour prix, voir catalogue en vigueur BASIC SAFETY PUBLICATION PUBLICATION FONDAMENTALE DE SCURIT 2 60068-2-2 IEC:2007 CONTENTS FOREWORD.4 INTRODUCTION.6 1
16、Scope.7 2 Normative references .7 3 Terms and definitions .8 4 Application of tests for non heat-dissipating specimens versus tests for heat-dissipating specimens 8 4.1 General .8 4.2 Ascertaining high or low air velocity in the test chamber8 4.3 Application of tests with sudden change of temperatur
17、e versus tests with gradual change of temperature9 4.4 Testing of heat-dissipating specimens .9 4.5 Temperature monitoring 9 4.6 Packaging .9 4.7 Diagrammatic representations .9 5 Test descriptions 10 5.1 General .10 5.2 Test Bb: Dry heat for non heat-dissipating specimens with gradual change of tem
18、perature.10 5.2.1 Object .10 5.2.2 General description .11 5.3 Test Bd: Dry heat for heat-dissipating specimens with gradual change of temperature that are not powered during the conditioning period.11 5.3.1 Object .11 5.3.2 General description .11 5.3.3 Energising the specimen .11 5.4 Test Be: Dry
19、heat for heat-dissipating specimens with gradual change of temperature that are required to be powered throughout the test.11 5.4.1 Object .11 5.4.2 General description .12 6 Test procedure .12 6.1 Confirmation of performance .12 6.2 Working space 12 6.3 Thermal radiation 12 6.4 Mounting .13 6.5 Sev
20、erities 13 6.5.1 General .13 6.5.2 Temperature13 6.5.3 Duration 13 6.6 Preconditioning .13 6.7 Initial measurements .13 6.8 Conditioning 13 6.8.1 Steady state conditions .13 6.8.2 Absolute humidity 14 6.9 Intermediate measurements 14 6.10 Final temperature ramp .14 60068-2-2 IEC:2007 3 6.11 Recovery
21、.14 6.12 Specimen with artificial cooling14 6.13 Final measurements 14 7 Information to be given in the relevant specification .15 8 Information to be given in the test report 15 Figure 1 Block diagram Tests B: Dry Heat10 4 60068-2-2 IEC:2007 INTERNATIONAL ELECTROTECHNICAL COMMISSION _ ENVIRONMENTAL
22、 TESTING Part 2-2: Tests Test B: Dry heat 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 q
23、uestions 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 Publicat
24、ion(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 c
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