IEC 60068-2-5:2018

Environmental testing - Part 2-5: Tests - Test S: Simulated solar radiation at ground level and guidance for solar radiation testing and weathering

IEC 60068-2-5:2018 specifies the methods for testing equipment or components under simulated solar radiation conditions. This document is applicable to the equipment and components at the surface of the earth. This third edition cancels and replaces the second edition of published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- the title of this document has been modified;
- the current thermal effect test method, specified as "Test method Sa" has been retained and the weathering test method specified as "Test method Sb" has been added.

Essais d’environnement – Partie 2-5: Essais – Essai S: Rayonnement solaire simulé au niveau du sol et recommandations pour les essais de rayonnement solaire et le vieillissement aux intempéries

L’IEC 60068-2-5:2018 spécifie les méthodes d’essai pour les équipements ou les composants soumis à des conditions de rayonnement solaire simulé.
Ce document est applicable aux équipements et aux composants qui se trouvent à la surface de la Terre.
La présente version bilingue (2018-10) correspond à la version anglaise monolingue publiée en 2018-04.
Cette troisième édition annule et remplace la deuxième édition parue en 2010. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente:
- le titre du présent document a été modifié;
- la méthode d’essai existante relative aux effets thermiques, spécifiée en tant que "Méthode d’essai Sa" a été conservée et la méthode d’essai de vieillissement aux intempéries, spécifiée en tant que "Méthode d’essai Sb" a été ajoutée. La version française de cette norme n'a pas été soumise au vote.

General Information

• Status: Published
• Publication Date: 05-Apr-2018
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 19.040 - Environmental testing
• Technical Committee: TC 104 - Environmental conditions, classification and methods of test
• Drafting Committee: MT 18 - TC 104/MT 18
• Current Stage: PPUB - Publication issued
• Start Date: 23-Apr-2018
• Completion Date: 06-Apr-2018

Relations

• Revises: IEC 60068-2-5:2010/COR1:2010 - Corrigendum 1 - Environmental testing - Part 2-5: Tests - Test Sa: Simulated solar radiation at ground level and guidance for solar radiation testing
• Effective Date: 05-Sep-2023
• Revises: IEC 60068-2-5:2010 - Environmental testing - Part 2-5: Tests - Test Sa: Simulated solar radiation at ground level and guidance for solar radiation testing
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60068-2-5 ®
Edition 3.0 2018-04
INTERNATIONAL
STANDARD
Environmental testing –
Part 2-5: Tests – Test S: Simulated solar radiation at ground level and guidance
for solar radiation testing and weathering
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.: [phone]
3, rue de Varembé [e-mail]
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
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IEC 60068-2-5 ®
Edition 3.0 2018-04
INTERNATIONAL
STANDARD
Environmental testing –
Part 2-5: Tests – Test S: Simulated solar radiation at ground level and guidance

for solar radiation testing and weathering

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.040 ISBN 978-2-8322-5514-8

– 2 – IEC 60068-2-5:2018 © IEC 2018
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 General remarks . 8
4.1 Overview. 8
4.2 Irradiance of solar radiation . 8
4.3 Spectral irradiance of solar radiation . 8
4.4 Radiation source . 9
5 Test method Sa: thermal effect test . 9
5.1 Conditioning . 9
5.1.1 General . 9
5.1.2 Temperature . 9
5.1.3 Humidity . 9
5.1.4 Ozone and other contamination gases . 9
5.1.5 Surface contamination . 10
5.1.6 Mounting of test specimen(s) . 10
5.1.7 Test facility . 10
5.1.8 Test apparatus . 10
5.2 Initial measurements . 11
5.3 Testing . 11
5.3.1 General . 11
5.3.2 Procedure Sa 1 – 24 h cycle, 8 h irradiation and 16 h darkness,
repeated as required . 11
5.3.3 Procedure Sa 2 – 24 h cycle, 20 h irradiation and 4 h darkness,
repeated as required . 11
5.3.4 Procedure Sa 3 – Continuous irradiation as required . 11
5.4 Final measurements . 13
6 Test method Sb: Weathering test with or without wetting . 13
6.1 Test apparatus . 13
6.1.1 Laboratory radiation source . 13
6.1.2 Test chamber. 14
6.1.3 Temperature . 14
6.1.4 Humidity . 15
6.1.5 Spray cycle . 15
6.1.6 Mounting of test specimen(s) . 15
6.1.7 Ozone and other contaminating gases . 15
6.1.8 Surface contamination . 15
6.2 Initial measurements . 15
6.3 Testing . 15
6.3.1 General . 15
6.3.2 Test duration . 16
6.3.3 Test procedure . 16
6.3.4 Ancillary environmental conditions . 16
6.4 Final measurements . 16

7 Information to be given in the relevant specification . 17
8 Information to be given in the test report. 17
Annex A (informative) Standard solar spectral irradiance . 18
Annex B (informative) Radiation source . 20
B.1 General . 20
B.2 Filters . 20
B.3 Uniformity of irradiance . 20
Annex C (informative) Typical apparatus for weathering . 21
Annex D (informative) Instrumentation . 23
D.1 General . 23
D.2 Measurement of irradiance . 23
D.3 Measurement of spectral irradiance . 23
D.4 Measurement of temperature . 23
D.5 Difference between insulated black panel and uninsulated black panel
thermometer . 23
Bibliography . 24

Figure 1 – Global solar spectral irradiance at sea level . 8
Figure 2 – Test procedures Sa 1, Sa 2 and Sa 3 . 13
Figure C.1 – Example of test apparatus . 21
Figure C.2 – Example of test apparatus with flat array . 22

Table 1 – Spectral irradiance . 9
Table 2 – Minimum and maximum levels of the relative spectral irradiance . 10
Table 3 – Relative spectral irradiance of xenon-arc lamp(s) with daylight filters . 14
Table 4 – Relative spectral irradiance for xenon-arc lamp(s) with window glass filters . 14
Table 5 – Exposure cycles . 16
Table A.1 – Comparison of basic atmospheric conditions used for the solar spectrum
defined in ASTM G 177 and that defined in CIE 85:1989, Table 4 . 19
Table A.2 – Irradiance comparison for the ASTM G 177 solar spectrum and the
CIE 85:1989, Table 4, solar spectrum . 19

– 4 – IEC 60068-2-5:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ENVIRONMENTAL TESTING –
Part 2-5: Tests – Test S: Simulated solar radiation at ground level and
guidance for solar radiation testing and weathering

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 sha
...

IEC 60068-2-5 ®
Edition 3.0 2018-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Environmental testing –
Part 2-5: Tests – Test Sa: Simulated solar radiation at ground level and guidance
for solar radiation testing and weathering

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.: [phone]
3, rue de Varembé [e-mail]
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.

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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

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Centre: [e-mail].
IEC 60068-2-5 ®
Edition 3.0 2018-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Environmental testing –
Part 2-5: Tests – Test Sa: Simulated solar radiation at ground level and guidance

for solar radiation testing and weathering

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 19.040 ISBN 978-2-8322-5580-3

– 2 – IEC 60068-2-5:2018 RLV © IEC 2018
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope and object . 7
2 Normative references . 7
3 Terms and definitions . 7
4 General remarks . 8
4.1 Overview. 8
4.2 Irradiance of solar radiation . 8
4.3 Spectral distribution irradiance of solar radiation . 9
4.4 Radiation source . 9
5 Test method Sa: thermal effect test . 10
5.1 Conditioning . 10
5.1.1 General . 10
5.1.2 Temperature . 10
5.1.3 Humidity . 10
5.1.4 Ozone and other contaminating contamination gases . 10
5.1.5 Surface contamination . 10
5.1.6 Mounting of test specimen(s) . 10
5.1.7 Test facility . 11
5.1.8 Test apparatus . 11
5.2 Initial measurements . 11
5.3 Testing . 11
5.3.1 General . 11
5.3.2 Procedure A Sa 1 – 24 h cycle, 8 h irradiation and 16 h darkness,
repeated as required . 12
5.3.3 Procedure B Sa 2 – 24 h cycle, 20 h irradiation and 4 h darkness,
repeated as required . 12
5.3.4 Procedure C Sa 3 – Continuous irradiation as required . 12
5.4 Final measurements . 15
6 Test method Sb: Weathering test with or without wetting . 15
6.1 Test apparatus . 15
6.1.1 Laboratory radiation source . 15
6.1.2 Test chamber. 16
6.1.3 Temperature . 16
6.1.4 Humidity . 17
6.1.5 Spray cycle . 17
6.1.6 Mounting of test specimen(s) . 17
6.1.7 Ozone and other contaminating gases . 17
6.1.8 Surface contamination . 17
6.2 Initial measurements . 17
6.3 Testing . 17
6.3.1 General . 17
6.3.2 Test duration . 18
6.3.3 Test procedure . 18
6.3.4 Ancillary environmental conditions . 18
6.4 Final measurements . 18

7 Information to be given in the relevant specification . 19
8 Information to be given in the test report. 19
Annex (informative) Interpretation of results .
Annex A (informative) Standard solar spectral irradiance . 23
Annex B (informative) Radiation source . 25
B.1 General . 25
B.2 Filters . 25
B.3 Uniformity of irradiance . 25
Annex C (informative) Typical apparatus for weathering . 26
Annex D (informative) Instrumentation . 28
D.1 General . 28
D.2 Measurement of irradiance . 28
D.3 Measurement of spectral distribution irradiance . 28
D.4 Measurement of temperature . 28
D.5 Difference between insulated black panel and uninsulated black panel
thermometer . 29
Bibliography . 30

Figure 1 – Global solar spectral irradiance at the earth´s surface for relative air mass 1
sea level . 9
Figure 2 – Test procedures A, B and C Sa 1, Sa 2 and Sa 3 . 15
Figure C.1 – Example of test apparatus . 26
Figure C.2 – Example of test apparatus with flat array . 27

Table – Calculated spectral distribution values .
Table 1 – Spectral energy distribution irradiance . 9
Table 2 – Minimum and maximum levels of the relative spectral irradiance . 11
Table 3 – Relative spectral irradiance of xenon-arc lamp(s) with daylight filters . 16
Table 4 – Relative spectral irradiance for xenon-arc lamp(s) with window glass filters . 16
Table 5 – Exposure cycles . 18
Table A.1 – Comparison of basic atmospheric conditions used for the solar spectrum
defined in ASTM G 177 and that defined in CIE 85:1989, Table 4 . 24
Table A.2 – Irradiance comparison for the ASTM G 177 solar spectrum and the
CIE 85:1989, Table 4, solar spectrum . 24

– 4 – IEC 60068-2-5:2018 RLV © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION

____________
ENVIRONMENTAL TESTING –
Part 2-5: Tests – Test Sa: Simulated solar radiation at ground level and
guidance for solar radiation testing and weathering

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
...

IEC 60068-2-5 ®
Edition 3.0 2018-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 2-5: Tests – Test S: Simulated solar radiation at ground level and guidance
for solar radiation testing and weathering

Essais d’environnement –
Partie 2-5: Essais – Essai S: Rayonnement solaire simulé au niveau du sol et
recommandations pour les essais de rayonnement solaire et le vieillissement
aux intempéries
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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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

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IEC 60068-2-5 ®
Edition 3.0 2018-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Environmental testing –
Part 2-5: Tests – Test S: Simulated solar radiation at ground level and guidance

for solar radiation testing and weathering

Essais d’environnement –
Partie 2-5: Essais – Essai S: Rayonnement solaire simulé au niveau du sol et

recommandations pour les essais de rayonnement solaire et le vieillissement

aux intempéries
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.040 ISBN 978-2-8322-6149-1

– 2 – IEC 60068-2-5:2018 © IEC 2018
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 General remarks . 8
4.1 Overview. 8
4.2 Irradiance of solar radiation . 8
4.3 Spectral irradiance of solar radiation . 8
4.4 Radiation source . 9
5 Test method Sa: thermal effect test . 9
5.1 Conditioning . 9
5.1.1 General . 9
5.1.2 Temperature . 9
5.1.3 Humidity . 9
5.1.4 Ozone and other contamination gases . 10
5.1.5 Surface contamination . 10
5.1.6 Mounting of test specimen(s) . 10
5.1.7 Test facility . 10
5.1.8 Test apparatus . 10
5.2 Initial measurements . 11
5.3 Testing . 11
5.3.1 General . 11
5.3.2 Procedure Sa 1 – 24 h cycle, 8 h irradiation and 16 h darkness,
repeated as required . 11
5.3.3 Procedure Sa 2 – 24 h cycle, 20 h irradiation and 4 h darkness,
repeated as required . 11
5.3.4 Procedure Sa 3 – Continuous irradiation as required . 11
5.4 Final measurements . 13
6 Test method Sb: Weathering test with or without wetting . 13
6.1 Test apparatus . 13
6.1.1 Laboratory radiation source . 13
6.1.2 Test chamber. 14
6.1.3 Temperature . 14
6.1.4 Humidity . 15
6.1.5 Spray cycle . 15
6.1.6 Mounting of test specimen(s) . 15
6.1.7 Ozone and other contaminating gases . 15
6.1.8 Surface contamination . 15
6.2 Initial measurements . 15
6.3 Testing . 15
6.3.1 General . 15
6.3.2 Test duration . 16
6.3.3 Test procedure . 16
6.3.4 Ancillary environmental conditions . 16
6.4 Final measurements . 16

7 Information to be given in the relevant specification . 17
8 Information to be given in the test report. 17
Annex A (informative) Standard solar spectral irradiance . 18
Annex B (informative) Radiation source . 20
B.1 General . 20
B.2 Filters . 20
B.3 Uniformity of irradiance . 20
Annex C (informative) Typical apparatus for weathering . 21
Annex D (informative) Instrumentation . 23
D.1 General . 23
D.2 Measurement of irradiance . 23
D.3 Measurement of spectral irradiance . 23
D.4 Measurement of temperature . 23
D.5 Difference between insulated black panel and uninsulated black panel
thermometer . 23
Bibliography . 24

Figure 1 – Global solar spectral irradiance at sea level . 8
Figure 2 – Test procedures Sa 1, Sa 2 and Sa 3 . 13
Figure C.1 – Example of test apparatus . 21
Figure C.2 – Example of test apparatus
...