SIST EN ISO 877-3:2018

Plastics - Methods of exposure to solar radiation - Part 3: Intensified weathering using concentrated solar radiation (ISO 877-3:2018)

This document specifies a method for exposing plastics to concentrated solar radiation using reflecting
concentrators to accelerate the weathering processes. The purpose is to assess property changes
produced after specified stages of such exposures. The reflecting concentrators used in these exposures
are sometimes referred to as “Fresnel reflectors” because in cross-section the array of mirrors used to
concentrate the solar radiation resembles the cross-section of a Fresnel lens.
General guidance concerning the scope of the ISO 877 series is given in ISO 877-1.
NOTE Additional information about solar concentrating exposures, including a partial list of standards in
which they are specified, is given in the Bibliography.

Kunststoffe - Freibewitterung - Teil 3: Beschleunigte Bewitterung mit gebündelter Sonnenstrahlung (ISO 877-3:2018)

Dieses Dokument legt ein Verfahren für die Beanspruchung von Kunststoffen mit gebündelter Sonnen-strahlung unter Verwendung von Fresnel-Sammelspiegeln zur Beschleunigung der Bewitterungsvorgänge fest. Das Ziel ist es, die Eigenschaftsänderungen, die nach bestimmten Stufen derartiger Beanspruchungen eintreten, zu beurteilen. Die bei diesen Beanspruchungen verwendeten Sammelspiegel werden mitunter als - Fresnel-Sammelspiegel - bezeichnet, weil der Querschnitt der Spiegelanordnung, die zur Bündelung der Sonnenstrahlung angewendet wird, dem Querschnitt einer Fresnel-Linse ähnelt.
Eine allgemeine Anleitung, die den Anwendungsbereich von ISO 877 betrifft, ist in ISO 877-1 angegeben.
ANMERKUNG Zu zusätzlichen Informationen über Beanspruchungen mit gebündelter Sonnenstrahlung einschließlich einer Teilliste von Normen, in denen diese festgelegt sind, siehe Literaturhinweise.

Plastiques - Méthodes d'exposition au rayonnement solaire - Partie 3: Exposition intensifiée par rayonnement solaire concentré (ISO 877-3:2018)

ISO 877-3:2018 spécifie une méthode d'exposition des plastiques à un rayonnement solaire concentré à l'aide de concentrateurs réfléchissants pour accélérer le processus d'exposition aux intempéries. L'objectif consiste à évaluer les changements produits après des phases d'exposition spécifiées. Les concentrateurs réfléchissants utilisés dans ces essais d'exposition sont parfois désignés sous le nom de «miroirs de Fresnel» car, vu en coupe transversale, le jeu de miroirs utilisé pour concentrer le rayonnement solaire ressemble à la coupe transversale d'une lentille de Fresnel.
Des lignes directrices générales relatives au domaine d'application de la série ISO 877 sont données dans l'ISO 877‑1.
NOTE       Des informations supplémentaires concernant les essais d'exposition à un rayonnement solaire concentré, y compris une liste partielle des normes dans lesquelles ils sont spécifiés, sont données dans la Bibliographie.

Polimerni materiali - Metode izpostavitve vremenskim vplivom - 3. del: Pospešeni vremenski vpliv z uporabo koncentriranega sončnega sevanja (ISO 877-3:2018)

Ta dokument določa metodo za izpostavitev plastike koncentriranemu sončnemu žarčenju z odbojnimi solarnimi koncentratorji za pospešitev vremenskega vpliva. Njegov namen je oceniti spremembe lastnosti, do katerih pride po določenih stopnjah take izpostavitve. Za odbojne koncentratorje, ki se uporabljajo pri teh izpostavitvah, se včasih uporablja izraz »Fresnelovi kolektorji«, ker je razporeditev ogledal, ki se uporablja za koncentracijo sončnega žarčenja, v prerezu podobna Fresnelovi leči.
Splošni napotki v zvezi s področjem uporabe skupine standardov ISO 877 so podani v standardu ISO 877-1.
OPOMBA: Več informacij o izpostavitvah koncentriranemu sončnemu žarčenju, vključno z nepopolnim seznamom standardov, v katerih so določene, je podanih v bibliografiji.

General Information

• Status: Published
• Public Enquiry End Date: 25-Oct-2016
• Publication Date: 08-Jul-2018
• ICS: 83.080.01 - Plastics in general
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 18-Jun-2018
• Due Date: 23-Aug-2018
• Completion Date: 09-Jul-2018
• Ref Project: EN ISO 877-3:2018 - Plastics - Methods of exposure to solar radiation - Part 3: Intensified weathering using concentrated solar radiation (ISO 877-3:2018)

Relations

• Revised: SIST EN ISO 877-3:2012 - Plastics - Methods of exposure to solar radiation - Part 3: Intensified weathering using concentrated solar radiation (ISO 877-3:2009)
• Effective Date: 15-Oct-2014
• Replaces: SIST EN ISO 877-3:2012 - Plastics - Methods of exposure to solar radiation - Part 3: Intensified weathering using concentrated solar radiation (ISO 877-3:2009)
• Effective Date: 13-Jun-2018

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 877-3:2018
01-september-2018
1DGRPHãþD
SIST EN ISO 877-3:2012
3ROLPHUQLPDWHULDOL0HWRGHL]SRVWDYLWYHYUHPHQVNLPYSOLYRPGHO3RVSHãHQL
YUHPHQVNLYSOLY]XSRUDERNRQFHQWULUDQHJDVRQþQHJDVHYDQMD,62
Plastics - Methods of exposure to solar radiation - Part 3: Intensified weathering using
concentrated solar radiation (ISO 877-3:2018)
Kunststoffe - Freibewitterung - Teil 3: Beschleunigte Bewitterung mit gebündelter
Sonnenstrahlung (ISO 877-3:2018)
Plastiques - Méthodes d'exposition au rayonnement solaire - Partie 3: Exposition
intensifiée par rayonnement solaire concentré (ISO 877-3:2018)
Ta slovenski standard je istoveten z: EN ISO 877-3:2018
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 877-3:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN ISO 877-3:2018

---------------------- Page: 2 ----------------------

SIST EN ISO 877-3:2018


EN ISO 877-3
EUROPEAN STANDARD

NORME EUROPÉENNE

June 2018
EUROPÄISCHE NORM
ICS 83.080.01 Supersedes EN ISO 877-3:2010
English Version

Plastics - Methods of exposure to solar radiation - Part 3:
Intensified weathering using concentrated solar radiation
(ISO 877-3:2018)
Plastiques - Méthodes d'exposition au rayonnement Kunststoffe - Freibewitterung - Teil 3: Beschleunigte
solaire - Partie 3: Exposition intensifiée par Bewitterung mit gebündelter Sonnenstrahlung (ISO
rayonnement solaire concentré (ISO 877-3:2018) 877-3:2018)
This European Standard was approved by CEN on 19 April 2018.

CEN 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 CEN
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 CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.





EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 877-3:2018 E
worldwide for CEN national Members.

---------------------- Page: 3 ----------------------

SIST EN ISO 877-3:2018
EN ISO 877-3:2018 (E)
Contents Page
European foreword . 3

2

---------------------- Page: 4 ----------------------

SIST EN ISO 877-3:2018
EN ISO 877-3:2018 (E)
European foreword
This document (EN ISO 877-3:2018) has been prepared by Technical Committee ISO/TC 61 “Plastics” in
collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2018, and conflicting national standards
shall be withdrawn at the latest by December 2018.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 877-3:2010.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 877-3:2018 has been approved by CEN as EN ISO 877-3:2018 without any modification.
3

---------------------- Page: 5 ----------------------

SIST EN ISO 877-3:2018

---------------------- Page: 6 ----------------------

SIST EN ISO 877-3:2018
INTERNATIONAL ISO
STANDARD 877-3
Second edition
2018-04
Plastics — Methods of exposure to
solar radiation —
Part 3:
Intensified weathering using
concentrated solar radiation
Plastiques — Méthodes d'exposition au rayonnement solaire —
Partie 3: Exposition intensifiée par rayonnement solaire concentré
Reference number
ISO 877-3:2018(E)
©
ISO 2018

---------------------- Page: 7 ----------------------

SIST EN ISO 877-3:2018
ISO 877-3:2018(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2018 – All rights reserved

---------------------- Page: 8 ----------------------

SIST EN ISO 877-3:2018
ISO 877-3:2018(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 2
6 Test specimens. 3
7 Exposure conditions . 3
7.1 Orientation of mirrors . 3
7.2 Exposure site . 4
7.3 Temperature control . 4
7.4 Irradiance level . 5
8 Exposure stages . 6
8.1 General . 6
8.2 Solar radiant exposure . 6
8.2.1 Guidance for selection of the exposure stage . 6
8.2.2 Instrumental measurement of solar radiant exposure . 6
9 Procedure. 7
9.1 Mounting of test specimens . 7
9.2 Mounting of reference materials (if used) . 7
9.3 Climatic observations . 7
9.4 Exposure of test specimens . 7
9.4.1 General. 7
9.4.2 Exposure cycles . 7
9.4.3 Testing under glass . 7
10 Expression of results . 8
10.1 Determination of changes in properties . 8
10.2 Climatic conditions and observations . 8
10.2.1 General. 8
10.2.2 Temperature . 8
10.2.3 Relative humidity . 8
10.2.4 Levels (values) of exposure stages . 8
10.2.5 Precipitation . 9
10.2.6 Time of wetness . 9
10.2.7 Other observations . 9
11 Test report . 9
Bibliography .10
© ISO 2018 – All rights reserved iii

---------------------- Page: 9 ----------------------

SIST EN ISO 877-3:2018
ISO 877-3:2018(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 6, Ageing,
chemical and environmental resistance.
This second edition cancels and replaces the first edition (ISO 877-3:2009), which has been technically
revised.
A list of all the parts in the ISO 877 series can be found on the ISO website.
iv © ISO 2018 – All rights reserved

---------------------- Page: 10 ----------------------

SIST EN ISO 877-3:2018
ISO 877-3:2018(E)

Introduction
The International Organization for Standardization (ISO) draws attention to the fact that it is claimed
that compliance with this document may involve the use of patents concerning temperature control
described in 7.3
ISO takes no position concerning the evidence, validity and scope of this patent right.
The holder of this patent right has assured ISO that he/she is willing to negotiate licences under
reasonable and non-discriminatory terms and conditions with applicants throughout the world. In
this respect, the statement of the holder of this patent right is registered with ISO. Information may be
obtained from:
Atlas Material Testing Technology LLC
Intellectual Property
45601 North 47th Avenue
Phoenix, Arizona 85087, USA
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those identified above. ISO shall not be held responsible for identifying any or
all such patent rights.
© ISO 2018 – All rights reserved v

---------------------- Page: 11 ----------------------

SIST EN ISO 877-3:2018

---------------------- Page: 12 ----------------------

SIST EN ISO 877-3:2018
INTERNATIONAL STANDARD ISO 877-3:2018(E)
Plastics — Methods of exposure to solar radiation —
Part 3:
Intensified weathering using concentrated solar radiation
1 Scope
This document specifies a method for exposing plastics to concentrated solar radiation using reflecting
concentrators to accelerate the weathering processes. The purpose is to assess property changes
produced after specified stages of such exposures. The reflecting concentrators used in these exposures
are sometimes referred to as “Fresnel reflectors” because in cross-section the array of mirrors used to
concentrate the solar radiation resembles the cross-section of a Fresnel lens.
General guidance concerning the scope of the ISO 877 series is given in ISO 877-1.
NOTE Additional information about solar concentrating exposures, including a partial list of standards in
which they are specified, is given in the Bibliography.
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.
ISO 877-1, Plastics — Methods of exposure to solar radiation — Part 1: General guidance
ISO 877-2, Plastics — Methods of exposure to solar radiation — Part 2: Direct weathering and exposure
behind window glass
ISO 4892-1, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance
ASTM G90, Standard Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials
Using Concentrated Natural Sunlight
ASTM G179, Standard Specification for Metal Black Panel and White Panel Temperature Devices for Natural
Weathering Tests
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http:// www .electropedia .org/
— ISO Online browsing platform: available at https:// www .iso .org/ obp
4 Principle
This docume
...

SLOVENSKI STANDARD
oSIST prEN ISO 877-3:2016
01-oktober-2016
3ROLPHUQLPDWHULDOL0HWRGHL]SRVWDYLWYHYUHPHQVNLPYSOLYRPGHO3RVSHãHQL
YUHPHQVNLYSOLY]XSRUDERNRQFHQWULUDQHJDVRQþQHJDVHYDQMD,62',6

Plastics - Methods of exposure to solar radiation - Part 3: Intensified weathering using
concentrated solar radiation (ISO/DIS 877-3:2016)
Kunststoffe - Freibewitterung - Teil 3: Beschleunigte Bewitterung mit gebündelter
Sonnenstrahlung (ISO/DIS 877-3:2016)
Plastiques - Méthodes d'exposition au rayonnement solaire - Partie 3: Exposition
intensifiée par rayonnement solaire concentré (ISO/DIS 877-3:2016)
Ta slovenski standard je istoveten z: prEN ISO 877-3
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
oSIST prEN ISO 877-3:2016 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN ISO 877-3:2016

---------------------- Page: 2 ----------------------
oSIST prEN ISO 877-3:2016
DRAFT INTERNATIONAL STANDARD
ISO/DIS 877-3
ISO/TC 61/SC 6 Secretariat: DIN
Voting begins on: Voting terminates on:
2016-08-03 2016-10-25
Plastics — Methods of exposure to solar radiation —
Part 3:
Intensified weathering using concentrated solar radiation
Plastiques — Méthodes d’exposition au rayonnement solaire —
Partie 3: Exposition intensifiée par rayonnement solaire concentré
ICS: 83.080.01
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
ISO/CEN PARALLEL PROCESSING
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 877-3:2016(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2016

---------------------- Page: 3 ----------------------
oSIST prEN ISO 877-3:2016
ISO/DIS 877-3:2016(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

---------------------- Page: 4 ----------------------
oSIST prEN ISO 877-3:2016
ISO/DIS 877-3:2016(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus . 1
4.1 General requirements . 1
4.2 Apparatus for measurement of climatic factors . 3
5 Test specimens. 3
6 Exposure conditions . 4
6.1 Orientation of mirrors . 4
6.2 Exposure site . 4
6.3 Temperature control . 4
6.4 Irradiance level . 5
7 Exposure stages . 6
7.1 General . 6
7.2 Solar radiant exposure . 6
7.2.1 Guidance for selection of the exposure stage . 6
7.2.2 Instrumental measurement of solar radiant exposure . 6
8 Procedure. 7
8.1 Mounting of test specimens . 7
8.2 Mounting of reference materials (if used) . 7
8.3 Climatic observations . 7
8.4 Exposure of test specimens . 7
8.4.1 General. 7
8.4.2 Exposure cycles . 7
8.4.3 Testing under glass . 7
9 Expression of results . 8
9.1 Determination of changes in properties . 8
9.2 Climatic conditions . 8
9.2.1 Climatic observations . 8
10 Test report . 9
Bibliography .10
© ISO 2016 – All rights reserved iii

---------------------- Page: 5 ----------------------
oSIST prEN ISO 877-3:2016
ISO/DIS 877-3:2016(E)

Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment,
as well as information about ISO’s adherence to the World Trade Organization (WTO) principles in the
Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 61/SC 6.
This second edition cancels and replaces the first edition (ISO 877-3:2009), which has been technically
revised.
ISO 877 consists of the following parts, under the general title Plastics — Methods of exposure to solar
radiation:
— Part 1: General guidance
— Part 2: Direct weathering and exposure behind window glass
— Part 3: Intensified weathering using concentrated solar radiation
iv © ISO 2016 – All rights reserved

---------------------- Page: 6 ----------------------
oSIST prEN ISO 877-3:2016
ISO/DIS 877-3:2016(E)

Introduction
The International Organization for Standardization (ISO) draws attention to the fact that it is claimed
that compliance with this document may involve the use of American patents US 6659638 B1,
US 7318672 B2 and US 4807247 concerning the temperature control discussed in 6.3. ISO takes no
position concerning the evidence, validity and scope of these patent rights.
The holder of these patent rights has assured ISO that he is willing to negotiate licences under reasonable
and non-discriminatory terms and conditions with applicants throughout the world. In this respect, the
statement of the holder of these patent rights is registered with ISO. Information may be obtained from:
Atlas Material Testing Technology LLC
Intellectual Property
45601 North 47th Avenue
Phoenix, Arizona 85087, USA
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights other than those identified above. ISO shall not be held responsible for identifying any or
all such patent rights.
© ISO 2016 – All rights reserved v

---------------------- Page: 7 ----------------------
oSIST prEN ISO 877-3:2016

---------------------- Page: 8 ----------------------
oSIST prEN ISO 877-3:2016
DRAFT INTERNATIONAL STANDARD ISO/DIS 877-3:2016(E)
Plastics — Methods of exposure to solar radiation —
Part 3:
Intensified weathering using concentrated solar radiation
1 Scope
This part of ISO 877 specifies a method for exposing plastics to concentrated solar radiation using
reflecting concentrators to accelerate the weathering processes. The purpose is to assess property
changes produced after specified stages of such exposures. General guidance concerning the scope of
ISO 877 is given in ISO/DIS 877-1:2016, Clause 1. The reflecting concentrators used in these exposures
are sometimes referred to as “Fresnel reflectors” because in cross-section the array of mirrors used to
concentrate the solar radiation resembles the cross-section of a Fresnel lens.
For additional information about solar concentrating exposures, including a partial list of standards in
which they are specified, refer to the Bibliography.
2 Normative references
The following referenced documents are indispensable for the application 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.
ISO/DIS 877-1:2016, Plastics — Methods of exposure to solar radiation — Part 1: General guidance
ISO 4582, Plastics — Determination of changes in colour and variations in properties after exposure to
daylight under glass, natural weathering or laboratory light sources
ISO 4892-1, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance
ASTM G 90, Standard Practice for Performing Accelerated Outdoor Weathering of Nonmetallic Materials
Using Concentrated Natural Sunlight
ASTM G 179, Standard Specification for Metal Black Panel and White Panel Temperature Devices for
Natural Weathering Tests
3 Principle
This part of ISO 877 describes a method for performing accelerated weathering on plastics using
intensified solar radiation. General guidance is given in ISO/DIS 877-1:2016, Clause 4.
4 Apparatus
4.1 General requirements
Refer to ISO/DIS 877-1:2016, 5.1, for general requirements.
All requirements for the solar concentrating device, operation of the device and measurement of the
solar radiation within the specimen exposure area shall be in accordance with ASTM G 90. See Figures 1
and 2 for schematic diagrams of the two types of test apparatus.
© ISO 2016 – All rights reserved 1

---------------------- Page: 9 ----------------------
oSIST prEN ISO 877-3:2016
ISO/DIS 877-3:2016(E)

Key
1 air plenum 6 mirror 11 clutch disc for elevation drive
2 air blower 7 gear box 12 solar cells with shadow hat
3 rotor assembly 8 mast for manual elevation adjustment 13 specimen protection door
4 air deflector 9 air flow switch 14 door release mechanism
5 A-frame assembly 10 water spray nozzles
Figure 1 — Schematic diagram of test apparatus with single-axis tracking
and manual elevation adjustment
2 © ISO 2016 – All rights reserved

---------------------- Page: 10 ----------------------
oSIST prEN ISO 877-3:2016
ISO/DIS 877-3:2016(E)

Key
1 air plenum 7 gear box for elevation drive 13 solar cells with shadow hat
2 air blower 8 control box 14 specimen protection door
3 rotor assembly 9 gear box for azimuth drive 15 door release mechanism
4 turntable assembly 10 air flow switch 16 air deflector
5 A-frame assembly 11 water spray nozzles
6 mirror 12 clutch disc for elevation drive
Figure 2 — Schematic diagram of test apparatus with dual-axis tracking
4.2 Apparatus for measurement of climatic factors
Refer to ISO/DIS 877-1:2016, 5.2.
5 Test specimens
Refer to ISO/DIS 877-1:2016, Clause 6.
NOTE When irregularly shaped specimens are used, air flow and specimen cooling may be adversely
affected. In addition, irradiance will not be uniform on all surfaces of a shaped specimen.
© ISO 2016 – All rights reserved 3

---------------------- Page: 11 ----------------------
oSIST prEN ISO 877-3:2016
ISO/DIS 877-3:2016(E)

6 Exposure conditions
6.1 Orientation of mirrors
For specific information on the orientation of the mirrors, refer to ASTM G 90.
6.2 Exposure site
Fresnel-reflecting solar concentrating devices operate mos
...