EN IEC 60068-2-30:2025

SLOVENSKI STANDARD
01-december-2025
Nadomešča:
SIST EN 60068-2-30:2006
Okoljski preskusi - 2-30. del: Preskusi - Preskus db: Vlažna toplota, ciklična (12 h +
12-urni cikel) (IEC 60068-2-30:2025)
Environmental testing - Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle)
(IEC 60068-2-30:2025)
Umgebungseinflüsse - Teil 2-30: Prüfverfahren - Prüfung Db: Feuchte Wärme, zyklisch
(12 + 12 Stunden) (IEC 60068-2-30:2025)
Essais d'environnement - Partie 2-30: Essais - Essai Db: Essai cyclique de chaleur
humide (cycle de 12 h + 12 h) (IEC 60068-2-30:2025)
Ta slovenski standard je istoveten z: EN IEC 60068-2-30:2025
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 60068-2-30

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2025
ICS 19.040 Supersedes EN 60068-2-30:2005
English Version
Environmental testing - Part 2-30: Tests - Test Db: Damp heat,
cyclic (12 h + 12 h cycle)
(IEC 60068-2-30:2025)
Essais d'environnement - Partie 2-30: Essais - Essai Db: Umgebungseinflüsse - Teil 2-30: Prüfverfahren - Prüfung
Essai cyclique chaleur de humide (cycle de 12 h + 12 h) Db: Feuchte Wärme, zyklisch (12 + 12 Stunden)
(IEC 60068-2-30:2025) (IEC 60068-2-30:2025)
This European Standard was approved by CENELEC on 2025-09-11. 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 60068-2-30:2025 E

European foreword
The text of document 104/1111/FDIS, future edition 4 of IEC 60068-2-30, 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 60068-2-30:2025.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2026-10-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2028-10-31
document have to be withdrawn
This document supersedes EN 60068-2-30:2005 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 60068-2-30:2025 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 60068-2-38 NOTE Approved as EN IEC 60068-2-38
IEC 60068-3-4 NOTE Approved as EN IEC 60068-3-4
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 60068-2-67 - Environmental testing - Part 2-67: Tests - EN 60068-2-67 -
Test Cy: Damp heat, steady state,
accelerated test primarily intended for
components
IEC 60068-2-30 ®
Edition 4.0 2025-08
INTERNATIONAL
STANDARD
Environmental testing -
Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle)
ICS 19.040  ISBN 978-2-8327-0616-9

IEC 60068-2-30:2025-08(en)
IEC 60068-2-30:2025 © IEC 2025
CONTENTS
FOREWORD. 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General description . 5
5 Description of test chamber . 6
6 Severities . 6
7 Testing procedure . 6
7.1 General . 6
7.2 Initial measurements . 7
7.3 Preconditioning . 7
7.4 Test cycle . 8
7.5 Intermediate measurements . 14
8 Recovery . 14
9 Final measurements . 15
10 Information to be given in the relevant specification . 16
11 Information to be given in the test report . 16
Annex A (informative) Selection of variant for the cooling period – Guidance . 18
Annex B (normative) Supporting documentation for temperature and humidity limits in
the test sequences . 19
B.1 General . 19
B.2 Preconditioning . 19
B.3 Variant 1 . 20
B.4 Variant 2 . 20
B.5 Recovery . 21
Annex C (informative) Supporting documentation for programming the set value . 22
C.1 General . 22
C.2 Preconditioning . 22
C.3 Variant 1 . 22
C.4 Variant 2 . 23
C.5 Recovery . 23
Bibliography . 24

Figure 1 – Test Db – Preconditioning period . 8
Figure 2 – Test Db – Test cycle – Variant 1, Method I . 10
Figure 3 – Test Db – Test cycle – Variant 1, Method II . 11
Figure 4 – Test Db – Test cycle – Variant 2, Method III . 12
Figure 5 – Test Db – Test cycle – Variant 2, Method IV . 13
Figure 6 – Test Db – Recovery at controlled conditions . 15

Table 1 – Severities of Test Db . 6
Table B.1 – Limits of relative humidity during preconditioning . 19
Table B.2 – Temperature limits during preconditioning . 19
Table B.3 – Limits of relative humidity and temperature during Variant 1 . 20
IEC 60068-2-30:2025 © IEC 2025
Table B.4 – Limits of relative humidity and temperature during Variant 2 . 20
Table B.5 – Limits of relative humidity during recovery . 21
Table B.6 – Temperature limits during recovery . 21
Table C.1 – Example of programming of the preconditioning . 22
Table C.2 – Example of programming of the relative humidity and temperature
(Variant 1) . 22
Table C.3 – Example of programming of the relative humidity and temperature
(Variant 2) . 23
Table C.4 – Example of programming of the recovery procedure . 23

IEC 60068-2-30:2025 © IEC 2025
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Environmental testing -
Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle)

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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 60068-2-30 has been prepared by IEC technical committee 104: Environmental conditions,
classification and methods of test. It is an International Standard.
This fourth edition cancels and replaces the third edition published in 2005. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) revision of the requirements for the test chamber;
b) change of the temperature tolerances of the test to limits;
c) updating of the figures for clarification purposes;
d) revision of the limits of the temperature and relative humidity during conditioning;
e) revision of the intermediate measurements;
f) revision of standardized requirements for the test report.
IEC 60068-2-30:2025 © IEC 2025
The text of this International Standard is based on the following documents:
Draft Report on voting
104/1111/FDIS 104/1125/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all the parts of 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 document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
IEC 60068-2-30:2025 © IEC 2025
1 Scope
This part of IEC 60068 specifies a test procedure to determine the suitability of components,
equipment, or other articles for use, transportation, and storage under conditions of high
humidity combined with cyclic temperature changes and, in general, producing condensation
on the surface of the specimen. This test method can also be used to validate the packaging of
specimen for transportation and storage.
This document does only in exceptional cases apply to specimens that are energized throughout
the test.
2 Normative references
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.
IEC 60068-1, Environmental testing - Part 1: General and guidance
IEC 60068-2-67, Environmental testing - Part 2-67: Tests - Test Cy: Damp heat, steady state,
accelerated test primarily intended for components
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60068-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
4 General description
This test comprises one or more temperature cycles in which the relative humidity is maintained
at a high level.
Two variants of the cycle are given which are identical except for the cooling period; during this
part of the cycle, Variant 2 allows wider limits of relative humidity and the temperature change
rate.
The conditioning temperature and the number of cycles (see Clause 6) determine the test
severity.
The preconditioning phase is illustrated in Figure 1, the test procedure in Figure 2 to Figure 5
and the recovery procedure in Figure 6.
NOTE For small, low mass specimens, it can be difficult to produce condensation on the surface of the specimen
using this procedure; considering an alternative test such as Test Z/AD (IEC 60068-2-38) can be helpful.
IEC 60068-2-30:2025 © IEC 2025
5 Description of test chamber
The test chamber shall be so constructed that:
a) the temperature in the working space can be varied cyclically between 22 °C to 28 °C as
well as the appropriate high conditioning temperature in a period specified in 7.4 as well as
Figure 2 to Figure 5, as applicable;
b) the relative humidity in the working space can be maintained within the limits of Variant 1
or Variant 2, or both, as given in 7.4 as well as in Figure 2 to Figure 5, as applicable;
c) the conditions prevailing at any point in the working space are uniform and are as similar as
possible to those prevailing in the immediate vicinity of suitably located temperature- and
humidity-sensing devices; the air in the chamber will therefore be continuously stirred at a
rate necessary to maintain the specified conditions of temperature and humidity;
d) the specimen under test is not subjected to radiant heat from the chamber conditioning
processes;
e) the water used for the chamber humidity system complies with the limits given in
IEC 60068-2-67;
f) any water is continuously drained from the chamber and not used again unless it has been
re-purified;
g) the materials used in the construction do not cause any significant corrosion of the
specimen, or degradation of the quality of the humidifying water;
h) injected moisture, when applicable, is not directly applied to the specimen but injected
remotely from the specimen. Precautions shall be taken to ensure that
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