EN 60068-2-39:2016

SLOVENSKI STANDARD
01-april-2016
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SIST EN 60068-2-39:2001
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Environmental testing - Part 2-39: Tests and Guidance: Combined temperature or
temperature and humidity with low air pressure tests
Umgebungseinflüsse - Teil 2-39: Prüfverfahren und Leitfaden - Kombinierte Prüfung der
Temperatur oder Temperatur und Feuchte mit niedrigem Luftdruck (IEC
104/609/CDV:2013)
/
Ta slovenski standard je istoveten z: EN 60068-2-39:2016
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 60068-2-39

NORME EUROPÉENNE
EUROPÄISCHE NORM
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 d'environnement - Partie 2-39: Essais - Essais et Umgebungseinflüsse - Teil 2-39: Prüfverfahren - Prüfungen
lignes directrices: Essais combinés de température ou de und Leitfaden: Kombinierte Prüfung der Temperatur oder
température et d'humidité à basse pression atmosphérique Temperatur und Feuchte mit niedrigem Luftdruck
(IEC 60068-2-39:2015) (IEC 60068-2-39:2015)
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 bibliographical 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 responsibility 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, 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 Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für 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. No. EN 60068-2-39:2016 E
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 approved by CENELEC as EN 60068-2-39:2016.

The following dates are fixed:
(dop) 2016-07-22
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2019-01-22
standards conflicting with the
document have to be withdrawn
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.
Endorsement 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 60068-2 (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.

Annex ZA
(normative)
Normative references to international 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 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 available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60068-1 -  Environmental testing -- Part 1: General EN 60068-1 -
and guidance
IEC 60068-2-78 -  Environmental testing -- Part 2-78: Tests - EN 60068-2-78 -
Test Cab: Damp heat, steady state

IEC 60068-2-39 ®
Edition 2.0 2015-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 2-39: Tests – Tests and guidance: Combined temperature or temperature

and humidity with low air pressure tests

Essais d'environnement –
Partie 2-39: Essais – Essais et lignes directrices: Essais combinés de

température ou de température et d’humidité à basse pression atmosphérique

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.040 ISBN 978-2-8322-2897-5

– 2 – IEC 60068-2-39:2015 © IEC 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 temperature 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 and
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
Figure 3 – Example of test sequence of temperature and humidity with low air
pressure . 11

Table 1 – Test severities . 7

IEC 60068-2-39:2015 © IEC 2015 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 2-39: Tests –
Tests and guidance: Combined temperature or
temperature 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 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 60068-2-39 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 1976 and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) preferred severities of the IEC 60068 series;
b) combined temperature, humidity and low air pressure

– 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 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.
A list of all parts in the IEC 60068 series, published under the general title Environmental
testing, can be found on the IEC website.
The committee has decided that the contents of this
...