EN 60068-2-38:2009
(Main)Environmental testing - Part 2-38: Tests - Test Z/AD: Composite temperature/humidity cyclic test
Environmental testing - Part 2-38: Tests - Test Z/AD: Composite temperature/humidity cyclic test
IEC 60068-2-38:2009 provides a composite test procedure, primarily intended for component type specimens, to determine, in an accelerated manner, the resistance of specimens to the deteriorative effects of high temperature/humidity and cold conditions. The major changes with regard to the previous edition concern the updating of the figures, changes to some of the wording and editorial corrections made for clarification. It has the status of a basic safety publication in accordance with IEC Guide 104.
Umgebungseinflüsse - Teil 2-38: Prüfverfahren - Prüfung Z/AD: Zusammengesetzte Prüfung, Temperatur/Feuchte, zyklisch
Essais d'environnement - Partie 2-38: Essais - Essai Z/AD: Essai cyclique composite de température et d'humidité
La CEI 60068-2-38:2009 fournit une procédure d'essai composite, principalement destinée aux spécimens de type composants, pour déterminer d'une manière accélérée la résistance des spécimens aux effets destructifs dus à des séjours dans des conditions d'humidité et de température élevées, alternées avec des conditions de froid. Les principales modifications par rapport à l'édition précédente concernent les mises à jour des figures, modifications terminologiques et éditoriales faites pour clarification. Elle a le statut de publication fondamentale de sécurité, conformément au Guide CEI 104.
Okoljsko preskušanje - 2-38. del: Preskusi - Preskus Z/AD: Sestavljeni ciklični preskus s temperaturo in vlago (IEC 60068-2-38:2009)
IEC 60068-2-38 zagotavlja postopek sestavljenega preskusa, namenjenega predvsem za sestavljene vzorce, za hitro določanje odpornosti vzorcev proti kvarnim učinkom visoke temperature/vlage in mraza.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2010
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SIST EN 60068-2-38:2001
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Environmental testing - Part 2-38: Tests - Test Z/AD: Composite temperature/humidity
cyclic test (IEC 60068-2-38:2009)
Umgebungseinflüsse - Teil 2-38: Prüfverfahren - Prüfung Z/AD: Zusammengesetzte
Prüfung, Temperatur/Feuchte, zyklisch (IEC 60068-2-38:2009)
Essais d'environnement - Partie 2-38: Essais - Essai Z/AD: Essai cyclique composite de
température et d'humidité (CEI 60068-2-38:2009)
Ta slovenski standard je istoveten z: EN 60068-2-38:2009
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 60068-2-38
NORME EUROPÉENNE
November 2009
EUROPÄISCHE NORM
ICS 19.040 Supersedes EN 60068-2-38:1999
English version
Environmental testing -
Part 2-38: Tests -
Test Z/AD: Composite temperature/humidity cyclic test
(IEC 60068-2-38:2009)
Essais d'environnement - Umgebungseinflüsse -
Partie 2-38: Essais - Teil 2-38: Prüfverfahren -
Essai Z/AD: Essai cyclique composite Prüfung Z/AD: Zusammengesetzte
de température et d'humidité Prüfung, Temperatur/Feuchte, zyklisch
(CEI 60068-2-38:2009) (IEC 60068-2-38:2009)
This European Standard was approved by CENELEC on 2009-09-01. 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 bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat 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 responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: Avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60068-2-38:2009 E
Foreword
The text of document 104/482/FDIS, future edition 2 of IEC 60068-2-38, prepared by IEC TC 104,
Environmental conditions, classification and methods of test, was submitted to the IEC-CENELEC parallel
vote and was approved by CENELEC as EN 60068-2-38 on 2009-09-01.
This European Standard supersedes EN 60068-2-38:1999.
The major changes with regard to EN 60068-2-38:1999 concern the updating of the figures, changes to
some of the wording and editorial corrections made for clarification.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60068-2-38:2009 was approved by CENELEC as a European
Standard without any modification.
__________
- 3 - EN 60068-2-38:2009
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
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
document (including any amendments) applies.
NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year
1) 2)
IEC 60068-1 - Environmental testing - EN 60068-1 1994
Part 1: General and guidance
1) 2)
IEC 60068-2-30 - Environmental testing - EN 60068-2-30 2005
Part 2-30: Tests - Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
1) 2)
IEC 60068-2-78 - Environmental testing - EN 60068-2-78 2001
Part 2-78: Tests - Test Cab: Damp heat,
steady state
1)
IEC Guide 104 - The preparation of safety publications - -
and the use of basic safety publications and
group safety publications
1)
Undated reference.
2)
Valid edition at date of issue.
IEC 60068-2-38
Edition 2.0 2009-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
BASIC SAFETY PUBLICATION
PUBLICATION FONDAMENTALE DE SÉCURITÉ
Environmental testing –
Part 2-38: Tests – Test Z/AD: Composite temperature/humidity cyclic test
Essais d’environnement –
Partie 2-38: Essais – Essai Z/AD: Essai cyclique composite de température et
d’humidité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
N
CODE PRIX
ICS 19.040 ISBN 2-8318-1022-6
– 2 – 60068-2-38 © IEC:2009
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references .5
3 General .5
3.1 Description of the test .5
3.2 Application of the test.6
4 Description of test chamber .6
4.1 Chamber for exposure to moisture.6
4.2 Chamber for exposure to cold.7
5 Severities .7
6 Testing procedure .7
6.1 Preconditioning (see figure 1).7
6.2 Initial measurements .8
6.3 Conditioning .8
6.4 Test cycle.12
6.4.1 Description of temperature/humidity subcycle .12
6.4.2 Description of cold subcycle .12
6.4.3 Description of 24 h cycles with no exposure to cold .13
6.4.4 Description of final cycle.13
6.5 Final measurements .13
6.5.1 At high humidity.13
6.5.2 Immediately upon removal from the chamber.13
6.5.3 After final drying .13
7 Information to be given in the relevant specification .14
8 Information to be given in the test report .14
Figure 1 – Preconditioning .8
Figure 2 – Exposure to humidity followed by exposure to cold .10
Figure 3 – Exposure to humidity not followed by exposure to cold.11
60068-2-38 © IEC:2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 2-38: Tests –
Test Z/AD: Composite temperature/humidity cyclic test
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 60068-2-38 has been prepared by IEC technical committee 104:
Environmental conditions, classification and methods of test.
This second edition cancels and replaces the first edition, published in 1974, and constitutes
a technical revision.
The major changes with regard to the previous edition concern the updating of the figures,
changes to some of the wording and editorial corrections made for clarification.
The text of this standard is based on the following documents:
FDIS Report on voting
104/482/FDIS 104/487/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.
– 4 – 60068-2-38 © IEC:2009
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.
60068-2-38 © IEC:2009 – 5 –
ENVIRONMENTAL TESTING –
Part 2-38: Tests –
Test Z/AD: Composite temperature/humidity cyclic test
1 Scope
IEC 60068-2-38 provides a composite test procedure, primarily intend
...
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