IEC 60068-3-6:2018
(Main)Environmental testing - Part 3-6: Supporting documentation and guidance - Confirmation of the performance of temperature/ humidity chambers
Environmental testing - Part 3-6: Supporting documentation and guidance - Confirmation of the performance of temperature/ humidity chambers
IEC 60068-3-6:2018 provides a uniform and reproducible method of confirming that temperature and humidity test chambers, without specimens, conform to the requirements specified in climatic test procedures of IEC 60068-2 (all parts). This document is intended for users when conducting regular chamber performance monitoring. This second edition cancels and replaces the first edition published in 2001. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Confirmation procedures are clarified.
The French version of this standard has not been voted upon.
Essais d'environnement - Partie 3-6: Documentation d'accompagnement et recommandations – Confirmation des performances des chambres d'essai en température/humidité
L'IEC 60068-3-6:2018 fournit une méthode uniforme et reproductible pour confirmer que les chambres d'essai en température et humidité, sans spécimens, respectent les exigences spécifiées dans les procédures d'essai climatique de l'IEC 60068-2 (toutes les parties). Le présent document s'adresse aux utilisateurs qui effectuent une surveillance régulière des performances des chambres.
La présente version bilingue (2019-07) correspond à la version anglaise monolingue publiée en 2018-01.
Cette deuxième édition annule et remplace la première édition parue en 2001. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- Les procédures de confirmation ont été clarifiées.
La version française de cette norme n'a pas été soumise au vote.
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IEC 60068-3-6 ®
Edition 2.0 2018-01
INTERNATIONAL
STANDARD
Environmental testing –
Part 3-6: Supporting documentation and guidance – Confirmation of the
performance of temperature/humidity chambers
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
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3, rue de Varembé info@iec.ch
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
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IEC 60068-3-6 ®
Edition 2.0 2018-01
INTERNATIONAL
STANDARD
Environmental testing –
Part 3-6: Supporting documentation and guidance – Confirmation of the
performance of temperature/humidity chambers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.040 ISBN 978-2-8322-5208-6
– 2 – IEC 60068-3-6:2018 © IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Measuring of performances . 9
4.1 Test area environment . 9
4.2 Measurement system . 9
4.3 Temperature measurement system . 9
4.4 Humidity measurement system . 9
4.5 Temperature/humidity chamber test specimens . 10
4.6 Specified location of temperature sensors and humidity sensor in working
space . 10
4.6.1 General . 10
4.6.2 Temperature sensors . 11
4.6.3 Humidity sensor . 11
4.7 Measurement method . 11
4.7.1 General . 11
4.7.2 Achieved humidity . 11
4.7.3 Temperature/humidity stabilization . 12
4.7.4 Humidity fluctuation . 12
4.7.5 Humidity gradient. 13
4.7.6 Humidity variation in space . 14
4.8 Standard humidity sequence . 15
5 Information to be given in the performance test report . 16
Bibliography . 17
Figure 1 – Example of humidity differences . 8
Figure 2 – Working space . 8
Figure 3 – Location sensors for temperature/humidity chambers up to 2 000 l. 10
Figure 4 – Location of minimal additional sensors for temperature/humidity chambers
over 2 000 l . 11
Figure 5 – Example of achieved humidity . 12
Figure 6 – Example of temperature/humidity stabilization . 12
Figure 7 – Example of humidity fluctuation . 13
Figure 8 – Example of humidity gradient for chambers up to 2 000 l . 14
Figure 9 – Example of humidity variation in space for chambers up to 2000 l . 15
Figure 10 – Example of climatogram . 16
Table 1 – Practical dimensions . 9
Table 2 – Example of test sequence . 15
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 3-6: Supporting documentation and guidance –
Confirmation of the performance of temperature/humidity chambers
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 60068-3-6 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 2001. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Confirmation procedures are clarified.
– 4 – IEC 60068-3-6:2018 © IEC 2018
The text of this International Standard is based on the following documents:
FDIS Report on voting
104/760/FDIS 104/779/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 60068-3-6 is to be read in conjunction with IEC 60068-3-5:2001 and IEC 60068-3-7:2001.
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 document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.
INTRODUCTION
IEC 60068 (all parts) contains fundamental information on environmental testing procedures
and severities.
The expression "environmental conditioning" or "environmental testing" covers the natural and
artificial environments to which components or equipment may be exposed so that an
assessment can be made of their performance under conditions of use, transport and storage
to which they may be exposed in practice.
Temperature and humidity chambers used for "environmental conditioning" or "environmental
testing" are not described in any publication, although the method of maintaining and
measuring temperature and/or humidity has a great influence on test results. The physical
characteristics of temperature and humidity chambers can also influence test results.
– 6 – IEC 60068-3-6:2018 © IEC 2018
ENVIRONMENTAL TESTING –
Part 3-6: Supporting documentation and guidance –
Confirmation of the performance of temperature/humidity chambers
1 Scope
This part of IEC 60068 provides a uniform and reproducible method of confirming that
temperature and humidity test chambers, without specimens, conform to the requirements
specified in climatic test procedures of IEC 60068-2 (all parts). This document is intended for
users when conducting regular chamber performance monitoring.
2 Normative references
The following documents are refe
...
IEC 60068-3-6 ®
Edition 2.0 2018-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Environmental testing –
Part 3-6: Supporting documentation and guidance – Confirmation of the
performance of temperature/humidity chambers
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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details all new publications released. Available online and If you wish to give us your feedback on this publication or
also once a month by email. need further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC 60068-3-6 ®
Edition 2.0 2018-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Environmental testing –
Part 3-6: Supporting documentation and guidance – Confirmation of the
performance of temperature/humidity chambers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.040 ISBN 978-2-8322-5325-0
– 2 – IEC 60068-3-6:2018 RLV © IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Measuring of performances . 9
4.1 Test area environment . 9
4.2 Measurement system . 9
4.3 Temperature measurement system . 9
4.4 Humidity measurement system . 10
4.5 Temperature/humidity chamber test specimens . 10
4.6 Specified location of temperature sensors and humidity sensor in working
space . 10
4.6.1 General . 10
Installation of sensors .
4.6.2 Temperature sensors . 11
4.6.3 Humidity sensor . 12
4.7 Measurement method . 12
4.7.1 General . 12
4.7.2 Achieved humidity . 12
4.7.3 Temperature/humidity stabilization . 13
4.7.4 Humidity fluctuation . 13
4.7.5 Humidity gradient. 14
4.7.6 Humidity variation in space . 15
4.8 Standard humidity sequence . 16
5 Information to be given in the performance test report . 18
Determination of humidity performance.
Evaluation criteria .
Bibliography . 19
Figure 1 – Example of humidity differences . 8
Figure 2 – Working space . 9
Figure 3 – Location sensors for temperature/humidity chambers up to 2 000 l. 11
Figure 4 – Location of minimal additional sensors for temperature/humidity chambers
over 2 000 l . 11
Figure 5 – Example of achieved humidity . 12
Figure 6 – Example of temperature/humidity stabilization . 13
Figure 7 – Example of humidity fluctuation . 14
Figure 8 – Example of humidity gradient for chambers up to 2 000 l . 15
Figure 9 – Example of humidity variation in space for chambers up to 2000 l . 16
Figure 10 – Example of climatogram . 17
Table 1 – Practical dimensions . 9
Table 2 – Example of test sequence . 17
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 3-6: Supporting documentation and guidance –
Confirmation of the performance of temperature/humidity chambers
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.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.
– 4 – IEC 60068-3-6:2018 RLV © IEC 2018
International Standard IEC 60068-3-6 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 2001. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Confirmation procedures are clarified.
The text of this International Standard is based on the following documents:
FDIS Report on voting
104/760/FDIS 104/779/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
IEC 60068-3-6 is to be read in conjunction with IEC 60068-3-5:2001 and IEC 60068-3-7:2001.
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 document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The “colour inside” logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this publication using a colour printer.
INTRODUCTION
IEC 60068 (all parts) contains fundamental information on environmental testing procedures
and severities.
The expression "environmental conditioning" or "environmental testing" covers the natural and
artificial environments to which components or equipment may be exposed so that an
assessment can be made of their performance under conditions of use, transport and storage
to which they may be exposed in practice.
Temperature and humidity chambers used for "environmental conditioning"
...
IEC 60068-3-6 ®
Edition 2.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 3-6: Supporting documentation and guidance – Confirmation of the
performance of temperature/humidity chambers
Essais d'environnement –
Partie 3-6: Documentation d'accompagnement et guide – Confirmation des
performances des chambres d'essai en température/humidité
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
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les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
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IEC Customer Service Centre - webstore.iec.ch/csc collected from earlier publications of IEC TC 37, 77, 86 and
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IEC 60068-3-6 ®
Edition 2.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 3-6: Supporting documentation and guidance – Confirmation of the
performance of temperature/humidity chambers
Essais d'environnement –
Partie 3-6: Documentation d'accompagnement et guide – Confirmation des
performances des chambres d'essai en température/humidité
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.040 ISBN 978-2-8322-7180-3
– 2 – IEC 60068-3-6:2018 © IEC 2018
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Measuring of performances . 9
4.1 Test area environment . 9
4.2 Measurement system . 9
4.3 Temperature measurement system . 9
4.4 Humidity measurement system . 9
4.5 Temperature/humidity chamber test specimens . 10
4.6 Specified location of temperature sensors and humidity sensor in working
space . 10
4.6.1 General . 10
4.6.2 Temperature sensors . 11
4.6.3 Humidity sensor . 11
4.7 Measurement method . 11
4.7.1 General . 11
4.7.2 Achieved humidity . 11
4.7.3 Temperature/humidity stabilization . 12
4.7.4 Humidity fluctuation . 12
4.7.5 Humidity gradient. 13
4.7.6 Humidity variation in space . 14
4.8 Standard humidity sequence . 15
5 Information to be given in the performance test report . 16
Bibliography . 17
Figure 1 – Example of humidity differences . 8
Figure 2 – Working space . 8
Figure 3 – Location of sensors for temperature/humidity chambers up to 2 000 l . 10
Figure 4 – Location of minimal additional sensors for temperature/humidity chambers
over 2 000 l . 10
Figure 5 – Example of achieved humidity . 11
Figure 6 – Example of temperature/humidity stabilization . 12
Figure 7 – Example of humidity fluctuation . 13
Figure 8 – Example of humidity gradient for chambers up to 2 000 l . 14
Figure 9 – Example of humidity variation in space for chambers up to 2000 l . 15
Figure 10 – Example of climatogram . 16
Table 1 – Practical dimensions . 9
Table 2 – Example of test sequence . 15
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 3-6: Supporting documentation and guidance –
Confirmation of the performance of temperature/humidity chambers
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
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International Standard IEC 60068-3-6 has been prepared by IEC technical committee 104:
Environmental conditions, classification and methods of test.
This bilingual version (2019-07) corresponds to the monolingual English version, published in
2018-01.
This second edition cancels and replaces the first edition published in 2001. This edition
constitutes a technical revision.
This edition
...
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