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This is a preview click here to buy the full publication. IEC 60068 2 78, Edition 2 0 2012 10, INTERNATIONAL. INTERNATIONALE, BASIC SAFETY PUBLICATION, PUBLICATION FONDAMENTALE DE S CURIT. Environmental testing, Part 2 78 Tests Test Cab Damp heat steady state. Essais d environnement, Partie 2 78 Essais Essai Cab Chaleur humide essai continu. IEC 60068 2 78 2012, This is a preview click here to buy the full publication.
2 60068 2 78 IEC 2012, FOREWORD 3, INTRODUCTION 5, 1 Scope and object 6. 2 Normative references 6, 3 Terms and definitions 6. 4 General test procedure 6, 4 1 Test chamber and measuring system 6. 4 2 Severity 7, 4 3 Pre conditioning 7, 4 4 Testing procedure 7. 4 5 Recovery procedure 8, 5 Measurements 8, 5 1 Initial measurements 8.
5 2 Intermediate measurements 8, 5 3 Final measurements 8. 6 Information to be given in the relevant specification 8. 7 Information to be given in the test report 9, Table 1 Temperature and relative humidity 7. This is a preview click here to buy the full publication. 60068 2 78 IEC 2012 3, INTERNATIONAL ELECTROTECHNICAL COMMISSION. ENVIRONMENTAL TESTING, Part 2 78 Tests Test Cab Damp heat steady state. 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 itself does not provide any attestation of conformity Independent certification 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 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 78 has been prepared by technical committee 104. Environmental conditions classification and methods of test. This second edition cancels and replaced the first edition published in 2001 and constitutes a. technical revision, This edition includes editorial and format changes with respect to the previous edition.
The test chamber from IEC 60068 3 6 has been introduced. This is a preview click here to buy the full publication. 4 60068 2 78 IEC 2012, The text of this standard is based on the following documents. FDIS Report on voting, 104 582 FDIS 104 588 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 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, replaced by a revised edition or, This is a preview click here to buy the full publication.
60068 2 78 IEC 2012 5, INTRODUCTION, This part of IEC 60068 provides a test method of high humidity at constant temperature. without condensation on the specimen over a prescribed period This test is performed to. evaluate the specimen as it is influenced by the absorption and diffusion of moisture and. moisture vapour, This is a preview click here to buy the full publication. 6 60068 2 78 IEC 2012, ENVIRONMENTAL TESTING, Part 2 78 Tests Test Cab Damp heat steady state. 1 Scope and object, This part of IEC 60068 establishes a test method for determining the ability of components or. equipment to withstand transportation storage and use under conditions of high humidity. The object of this standard is to investigate the effect of high humidity at constant temperature. without condensation on a specimen over a prescribed period. It is applicable to small equipment or components as well as large equipment and can be. applied to both heat dissipating and non heat dissipating specimens. 2 Normative references, 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 the referenced document including any. amendments applies, IEC 60068 1 Environmental testing Part 1 General and guidance. IEC 60068 3 6 Environmental testing Part 3 6 Supporting documentation and guidance. Confirmation of the performance of temperature and humidity chambers. IEC Guide 104 The preparation of safety publications and the use of basic safety publications. and group safety publications, 3 Terms and definitions. 4 General test procedure, 4 1 Test chamber and measuring system. The temperature and humidity chamber shall be constructed and verified in accordance with. specifications IEC 60068 3 6, The chamber and measuring system shall be such that. sensing devices can be located in the working space to monitor the temperature and. NOTE For heat dissipating specimens the temperature and humidity near the specimen may be influenced by. the effect of heat dissipation from the specimen, condensed water is drained from the chamber and not re used unless purified.
no condensed water from the walls and roof of the test chamber can fall on the. specimen s, This is a preview click here to buy the full publication. 10 60068 2 78 CEI 2012, AVANT PROPOS 11, INTRODUCTION 13. 1 Domaine d application et objet 14, 2 R f rence normatives 14. 3 Termes et d finitions 14, 4 Proc dure d essai g n rales 14. 4 1 Chambre d essai et syst me de mesure 14, 4 2 S v rit 15.
4 3 Pr conditionnement 15, 4 4 Proc dure d essai 15. 4 5 Modalit s d ex cution de la reprise 16, 5 Mesures 16. 5 1 Mesures initiales 16, 5 2 Mesures interm diaires 16. 5 3 Mesures finales 16, 6 Renseignements que doit fournir la sp cification applicable 16. 7 Renseignements que doit fournir le rapport d essai 17. Tableau 1 Temp rature et humidit relative 15, This is a preview click here to buy the full publication.
60068 2 78 CEI 2012 11, COMMISSION LECTROTECHNIQUE INTERNATIONALE. ESSAIS D ENVIRONNEMENT, Partie 2 78 Essais Essai Cab Chaleur humide essai continu. AVANT PROPOS, 1 La Commission Electrotechnique Internationale CEI est une organisation mondiale de normalisation. compos e de l ensemble des comit s lectrotechniques nationaux Comit s nationaux de la CEI La CEI a. pour objet de favoriser la coop ration internationale pour toutes les questions de normalisation dans les. domaines de l lectricit et de l lectronique A cet effet la CEI entre autres activit s publie des Normes. internationales des Sp cifications techniques des Rapports techniques des Sp cifications accessibles au. public PAS et des Guides ci apr s d nomm s Publication s de la CEI Leur laboration est confi e des. comit s d tudes aux travaux desquels tout Comit national int ress par le sujet trait peut participer Les. organisations internationales gouvernementales et non gouvernementales en liaison avec la CEI participent. galement aux travaux La CEI collabore troitement avec l Organisation Internationale de Normalisation ISO. selon des conditions fix es par accord entre les deux organisations. 2 Les d cisions ou accords officiels de la CEI concernant les questions techniques repr sentent dans la mesure. du possible un accord international sur les sujets tudi s tant donn que les Comit s nationaux de la CEI. int ress s sont repr sent s dans chaque comit d tudes. 3 Les Publications de la CEI se pr sentent sous la forme de recommandations internationales et sont agr es. comme telles par les Comit s nationaux de la CEI Tous les efforts raisonnables sont entrepris afin que la CEI. s assure de l exactitude du contenu technique de ses publications la CEI ne peut pas tre tenue responsable. de l ventuelle mauvaise utilisation ou interpr tation qui en est faite par un quelconque utilisateur final. 4 Dans le but d encourager l uniformit internationale les Comit s nationaux de la CEI s engagent dans toute la. mesure possible appliquer de fa on transparente les Publications de la CEI dans leurs publications. nationales et r gionales Toutes divergences entre toutes Publications de la CEI et toutes publications. nationales ou r gionales correspondantes doivent tre indiqu es en termes clairs dans ces derni res. 5 La CEI elle m me ne fournit aucune attestation de conformit Des organismes de certification ind pendants. fournissent des services d valuation de conformit et dans certains secteurs acc dent aux marques de. conformit de la CEI La CEI n est responsable d aucun des services effectu s par les organismes de. certification ind pendants, 6 Tous les utilisateurs doivent s assurer qu ils sont en possession de la derni re dition de cette publication. 7 Aucune responsabilit ne doit tre imput e la CEI ses administrateurs employ s auxiliaires ou. mandataires y compris ses experts particuliers et les membres de ses comit s d tudes et des Comit s. nationaux de la CEI pour tout pr judice caus en cas de dommages corporels et mat riels ou de tout autre. dommage de quelque nature que ce soit directe ou indirecte ou pour supporter les co ts y compris les frais. de justice et les d penses d coulant de la publication ou de l utilisation de cette Publication de la CEI ou de. toute autre Publication de la CEI ou au cr dit qui lui est accord. 8 L attention est attir e sur les r f rences normatives cit es dans cette publication L utilisation de publications. r f renc es est obligatoire pour une application correcte de la pr sente publication. 9 L attention est attir e sur le fait que certains des l ments de la pr sente Publication de la CEI peuvent faire. l objet de droits de brevet La CEI ne saurait tre tenue pour responsable de ne pas avoir identifi de tels droits. de brevets et de ne pas avoir signal leur existence. La Norme internationale CEI 60068 2 78 a t tablie par le comit d tudes 104 de la CEI. Conditions classification et essais d environnement. Cette deuxi me dition annule et remplace la premi re dition publi e en 2001 et constitue. une r vision technique, Cette dition inclut des modifications ditoriales et de mise en page par rapport l dition.
pr c dente, L essai en chambre de la CEI 60038 3 6 est ajout. This is a preview click here to buy the full publication. 12 60068 2 78 CEI 2012, Le texte de cette norme est issu des documents suivants. FDIS Rapport de vote, 104 582 FDIS 104 588 RVD, Le rapport de vote indiqu dans le tableau ci dessus donne toute information sur le vote ayant. abouti l approbation de cette norme, Cette publication a t r dig e selon les Directives ISO CEI Partie 2. 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

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