SIST EN IEC 60068-2-2:2026
(Main)Environmental testing - Part 2-2: Tests - Test b: Dry heat (IEC 60068-2-2:2025)
Environmental testing - Part 2-2: Tests - Test b: Dry heat (IEC 60068-2-2:2025)
IEC 60068-2-2:2025 specifies dry heat temperature tests that are applicable to non-heat-dissipating and heat-dissipating specimens, to determine the ability of components, equipment or other articles to be used, transported or stored at high temperature.
This document is applicable to energized as well as non-energized specimens that normally achieve temperature stability during the test. The specimens can be subject to test in packed condition (to simulate transportation and storage) or in unpacked condition (to simulate use).
This document does not specify tests to determine the impact of temperature changes on specimens.
This sixth edition cancels and replaces the fifth edition published in 2007. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) revision of the introduction and scope;
b) inclusion of new figures and symbols for clarification purposes;
c) clarification of the test procedure for ascertaining high or low air velocity in the test chamber;
d) clarification of the requirements for measuring points around, on or in specimens;
e) reintroduction of the nomogram procedure for the correction of the conditioning temperature when testing with high air velocity (Test Bd and Test Be);
f) revision of the temperature tolerances of the test;
g) revision of standardized requirements for the relevant specification and test report;
h) inclusion of the advantages and disadvantages of the testing procedures.
Umgebungseinflüsse - Teil 2-2: Prüfverfahren - Prüfung B: Trockene Wärme (IEC 60068-2-2:2025)
Essais d'environnement - Partie 2-2: Essais - Essai b: Chaleur sèche (IEC 60068-2-2:2025)
L'IEC 60068-2-2:2025 spécifie les essais de chaleur sèche qui sont applicables aux spécimens non dissipateurs de chaleur et dissipateurs de chaleur, afin de déterminer l'aptitude des composants, équipements ou autres articles destinés à être utilisés, transportés ou stockés à haute température.
Cette sixième édition de annule et remplace la cinquième édition parue en 2007. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) révision de l'introduction et du domaine d'application;
b) ajout de nouvelles figures et de nouveaux symboles à des fins de clarification;
c) clarification de la procédure d'essai pour la vérification de la haute ou faible vitesse de l'air dans la chambre d'essai;
d) clarification des exigences pour le mesurage des points autour ou au-dessus des spécimens;
e) réintroduction de la procédure d'abaque pour la correction de la température d'épreuve lors de l'essai avec haute vitesse de l'air (Essai Bd et Essai Be);
f) révision des tolérances de température de l'essai;
g) révision des exigences normalisées pour la spécification applicable et le rapport d'essai;
h) ajout des avantages et inconvénients des procédures d'essai.
Okoljsko preskušanje - 2-2. del: Preskusi - Preskusi b: Suha vročina (IEC 60068-2-2:2025)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2026
Okoljsko preskušanje - 2-2. del: Preskusi - Preskusi b: Suha vročina (IEC 60068-2-
2:2025)
Environmental testing - Part 2-2: Tests - Test b: Dry heat (IEC 60068-2-2:2025)
Umgebungseinflüsse - Teil 2-2: Prüfverfahren - Prüfung B: Trockene Wärme (IEC 60068
-2-2:2025)
Essais d'environnement - Partie 2-2: Essais - Essai b: Chaleur sèche (IEC 60068-2-
2:2025)
Ta slovenski standard je istoveten z: EN IEC 60068-2-2:2025
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 IEC 60068-2-2
NORME EUROPÉENNE
EUROPÄISCHE NORM November 2025
ICS 19.040 Supersedes EN 60068-2-2:2007
English Version
Environmental testing - Part 2-2: Tests - Test B: Dry heat
(IEC 60068-2-2:2025)
Essais d'environnement - Partie 2-2: Essais - Essai B: Umgebungseinflüsse - Teil 2-2: Prüfverfahren - Prüfung B:
Chaleur sèche Trockene Wärme
(IEC 60068-2-2:2025) (IEC 60068-2-2:2025)
This European Standard was approved by CENELEC on 2025-10-28. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60068-2-2:2025 E
European foreword
The text of document 104/1108/FDIS, future edition 6 of IEC 60068-2-2, prepared by TC 104
"Environmental conditions, classification and methods of test" was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN IEC 60068-2-2:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-11-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-11-30
document have to be withdrawn
This document supersedes EN 60068-2-2:2007 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60068-2-2:2025 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 standard indicated:
IEC 60068-2-1 NOTE Approved as EN 60068-2-1
IEC 60068-2-14 NOTE Approved as EN IEC 60068-2-14
IEC 60068-3-1 NOTE Approved as EN IEC 60068-3-1
IEC 60068-3-6 NOTE Approved as EN IEC 60068-3-6
IEC 60068-3-7 NOTE Approved as EN IEC 60068-3-7
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 1 Where 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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60068-1 - Environmental testing - Part 1: General EN 60068-1 -
and guidance
IEC 60068-5-2 - Environmental testing - Part 5-2: Guide to EN 60068-5-2 -
drafting of test methods - Terms and
definitions
IEC 60721 series Classification of environmental conditions EN 60721 series
IEC 60068-2-2 ®
Edition 6.0 2025-09
INTERNATIONAL
STANDARD
Environmental testing -
Part 2-2: Tests - Test B: Dry heat
ICS 19.040 ISBN 978-2-8327-0732-6
IEC 60068-2-2:2025-09(en)
IEC 60068-2-2:2025 © IEC 2025
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Symbols . 7
5 Application of tests for non-heat-dissipating specimens versus tests for heat-
dissipating specimens . 7
5.1 General . 7
5.2 Ascertaining high or low air velocity in the test chamber . 8
5.3 Temperature monitoring . 9
5.4 Packaging . 10
5.5 Background . 10
6 Test descriptions . 10
6.1 General . 10
6.2 Severities. 11
6.2.1 General . 11
6.2.2 High conditioning temperature T . 11
B
6.2.3 Exposure time t . 11
6.3 Test Bb: Dry heat for non-heat-dissipating specimens . 11
6.4 Test Bd: Dry heat for heat-dissipating specimens that are energized after
initial temperature stabilization. 13
6.5 Test Be: Dry heat for heat-dissipating specimens that are energized
throughout the test . 14
7 Testing procedure. 15
7.1 General . 15
7.2 Thermal radiation . 15
7.3 Specimen with artificial cooling or heating . 15
7.4 Mounting . 15
7.5 Initial measurements . 16
7.6 Preconditioning . 16
7.7 Conditioning. 16
7.8 Intermediate measurements . 16
7.9 Final temperature ramp . 16
7.10 Recovery . 16
7.11 Final measurements. 17
8 Information to be given in the relevant specification . 17
9 Information to be given in the test report . 18
Annex A (informative) Relationship of suffixes between Test A: Cold and Test B: Dry
heat . 19
Annex B (normative) Nomogram for the correction of the conditioning temperature . 20
B.1 General . 20
B.2 Determination of the corrected high conditioning temperature T . 20
B'
B.2.1 General . 20
B.2.2 Application of the graphical solution method . 20
B.2.3 Application of the numerical solution method . 22
IEC 60068-2-2:2025 © IEC 2025
B.2.4 Conditioning with the corrected conditioning temperature T . 23
B'
B.2.5 Further adjustment of the corrected high conditioning temperature T . 24
B'
B.3 Example of application of the nomogram . 25
B.3.1 Example of test setup and specimen . 25
B.3.2 Graphical solution method . 25
B.3.3 Numerical solution method . 27
Annex C (informative) Advantages and disadvantages of available test procedures for
heat-dissipating specimens . 28
Bibliography . 29
Figure 1 – Examples of temperature profiles of energized heat-dissipating specimens
in test chambers with a) high air velocity and b) low air velocity . 9
Figure 2 – Block diagram of the test procedures and applicable selection criteria of
Test B: Dry heat . 10
Figure 3 – Test Bb: Dry heat for non-heat-dissipating and non-operating specimens . 12
Figure 4 – Test Bb: Dry heat for non-heat-dissipating, operating specimens . 12
Figure 5 – Test Bd: Dry heat for heat-dissipating specimens that are energized after
initial temperature stabilization . 13
Figure 6 – Test Be: Dry heat for heat-dissipating specimens that are required to be
energized throughout the test . 14
Figure B.1 – Nomogram to determine the corrected conditioning temperature T . 21
B'
Figure B.2 – a) Test Bd and b) Test Be with the corrected conditioning temperature T . 23
B'
Figure B.3 – a) Test Bd and b) Test Be with the corrected conditioning temperature T
B'
and a second temperature adjustment . 24
Figure B.4 – a) Test Bd and b) Test Be with a preliminary temperature below the
corrected conditioning temperature T and a second temperature adjustment . 25
B'
Figure B.5 – Nomogram with example of application of the procedure. 26
Table 1 – Preferred values for the high conditioning temperature T . 11
B
Table 2 – Preferred values for the exposure time t . 11
Table A.1 – Relationship of suffixes between Test A: Cold, and Test B: Dry heat . 19
IEC 60068-2-2:2025 © IEC 2025
INTERNATIONAL ELECTROT
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