SIST EN ISO 4892-2:2013
(Main)Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps (ISO 4892-2:2013)
Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps (ISO 4892-2:2013)
This part of ISO 4892 specifies methods for exposing specimens to xenon-arc light in the presence of moisture to reproduce the weathering effects (temperature, humidity and/or wetting) that occur when materials are exposed in actual end-use environments to daylight or to daylight filtered through window glass. Specimen preparation and evaluation of the results are covered in other International Standards for specific materials. General guidance is given in ISO 4892-1.
Kunststoffe - Künstliches Bestrahlen oder Bewittern in Geräten - Teil 2: Xenonbogenlampen (ISO 4892-2:2013)
Dieser Teil von ISO 4892 legt die Verfahren fest, bei denen Probekörper in einem Gerät einer Xenonbogenstrahlung,
Wärme und Wasser ausgesetzt werden, um die Bewitterungseffekte nachzubilden, die
auftreten, wenn Werkstoffe in realen, im Endgebrauch vorhandenen Umgebungen der Globalstrahlung oder
Globalstrahlung hinter Fensterglas ausgesetzt sind.
Die Probekörper werden bei geregelten Umgebungsbedingungen (Temperatur, Luftfeuchte und/oder
Benässung) gefilterter Xenonlampenstrahlung ausgesetzt. Um verschiedene Anforderungen zu erfüllen,
können unterschiedliche Typen Xenonbogenlampen und unterschiedliche Filterkombinationen verwendet
werden.
Die Vorbereitung der Probekörper und die Auswertung der Ergebnisse werden in anderen, für bestimmte
Werkstoffe vorgesehenen Internationalen Normen behandelt.
Eine allgemeine Anleitung ist in ISO 4892-1 gegeben.
ANMERKUNG Die Beanspruchung von Beschichtungsstoffen durch Xenonbogenstrahlung ist in ISO 11341 [2]
beschrieben.
Plastiques - Méthodes d'exposition à des sources lumineuses de laboratoire - Partie 2: lampes à arc au xénon (ISO 4892-2:2013)
L'ISO 4892-2:2013 spécifie des méthodes pour l'exposition d'éprouvettes à des sources lumineuses à arc au xénon, en présence d'humidité, pour reproduire les effets de vieillissement (température, humidité et/ou mouillage) qui se produisent lorsque des matériaux sont exposés, dans des environnements d'utilisation finale réels, à la lumière du jour et à la lumière du jour filtrée à travers un vitrage de fenêtre.
Polimerni materiali - Metode izpostavitve laboratorijskim virom svetlobe - 2. del: Ksenonske svetilke (ISO 4892-2:2013)
Ta del standarda ISO 4892 navaja metode izpostavitve primerkov ksenonski svetlobi v vlažnem okolju, kar poustvari vremenske vplive (temperaturo, vlažnost in/ali močenje), do katerih pride, ko so materiali v okolju, kjer se uporabljajo, izpostavljeni neposredni dnevni svetlobi ali dnevni svetlobi, ki se filtrira skozi okensko steklo. Priprava primerkov in vrednotenje rezultatov sta obravnavana v drugih mednarodnih standardih za določene materiale. Splošne smernice so podane v standardu ISO 4892-1.
General Information
Relations
Related Packages
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 4892-2:2013
01-junij-2013
1DGRPHãþD
SIST EN ISO 4892-2:2006
SIST EN ISO 4892-2:2006/A1:2009
Polimerni materiali - Metode izpostavitve laboratorijskim virom svetlobe - 2. del:
Ksenonske svetilke (ISO 4892-2:2013)
Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps (ISO
4892-2:2013)
Kunststoffe - Künstliches Bestrahlen oder Bewittern in Geräten - Teil 2:
Xenonbogenlampen (ISO 4892-2:2013)
Plastiques - Méthodes d'exposition à des sources lumineuses de laboratoire - Partie 2:
lampes à arc au xénon (ISO 4892-2:2013)
Ta slovenski standard je istoveten z: EN ISO 4892-2:2013
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 4892-2:2013 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 4892-2:2013
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SIST EN ISO 4892-2:2013
EUROPEAN STANDARD
EN ISO 4892-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2013
ICS 83.080.01 Supersedes EN ISO 4892-2:2006
English Version
Plastics - Methods of exposure to laboratory light sources - Part
2: Xenon-arc lamps (ISO 4892-2:2013)
Plastiques - Méthodes d'exposition à des sources Kunststoffe - Künstliches Bestrahlen oder Bewittern in
lumineuses de laboratoire - Partie 2: lampes à arc au Geräten - Teil 2: Xenonbogenlampen (ISO 4892-2:2013)
xénon (ISO 4892-2:2013)
This European Standard was approved by CEN on 9 February 2013.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2013 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4892-2:2013: E
worldwide for CEN national Members.
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SIST EN ISO 4892-2:2013
EN ISO 4892-2:2013 (E)
Contents Page
Foreword . 3
2
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SIST EN ISO 4892-2:2013
EN ISO 4892-2:2013 (E)
Foreword
This document (EN ISO 4892-2:2013) 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 September 2013, and conflicting national standards shall be
withdrawn at the latest by September 2013.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 4892-2:2006.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4892-2:2013 has been approved by CEN as EN ISO 4892-2:2013 without any modification.
3
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SIST EN ISO 4892-2:2013
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SIST EN ISO 4892-2:2013
INTERNATIONAL ISO
STANDARD 4892-2
Third edition
2013-03-01
Plastics — Methods of exposure to
laboratory light sources —
Part 2:
Xenon-arc lamps
Plastiques — Méthodes d’exposition à des sources lumineuses de
laboratoire —
Partie 2: Lampes à arc au xénon
Reference number
ISO 4892-2:2013(E)
©
ISO 2013
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SIST EN ISO 4892-2:2013
ISO 4892-2:2013(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2013
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
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2013 – All rights reserved
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SIST EN ISO 4892-2:2013
ISO 4892-2:2013(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Apparatus . 2
4.1 Laboratory light source . 2
4.2 Test chamber . 4
4.3 Radiometer . 5
4.4 Black-standard/black-panel thermometer . 5
4.5 Wetting and humidity-control equipment . 5
4.6 Specimen holders . 5
4.7 Apparatus to assess changes in properties . 6
5 Test specimens. 6
6 Exposure conditions . 6
6.1 Radiation . 6
6.2 Temperature . 6
6.3 Relative humidity of chamber air . 7
6.4 Spray cycle . 7
6.5 Cycles with dark periods . 8
6.6 Sets of exposure conditions . 8
7 Procedure. 9
7.1 General . 9
7.2 Mounting the test specimens . 9
7.3 Exposure . 9
7.4 Measurement of radiant exposure . 9
7.5 Determination of changes in properties after exposure . 9
8 Exposure report . 9
Annex A (informative) Filtered xenon-arc radiation — Relative spectral irradiance .10
Annex B (normative) Additional exposure cycles .11
Bibliography .13
© ISO 2013 – All rights reserved iii
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SIST EN ISO 4892-2:2013
ISO 4892-2:2013(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International
Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies
casting a vote.
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.
ISO 4892-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 6, Ageing,
chemical and environmental resistance.
This third edition cancels and replaces the second edition (ISO 4892-2:2006), which has been technically
revised. It also cancels and replaces the Amendment ISO 4892-2:2006/Amd.1:2009.
ISO 4892 consists of the following parts, under the general title Plastics — Methods of exposure to
laboratory light sources:
— Part 1: General guidance
— Part 2: Xenon-arc lamps
— Part 3: Fluorescent UV lamps
— Part 4: Open-flame carbon-arc lamps
iv © ISO 2013 – All rights reserved
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SIST EN ISO 4892-2:2013
INTERNATIONAL STANDARD ISO 4892-2:2013(E)
Plastics — Methods of exposure to laboratory light sources —
Part 2:
Xenon-arc lamps
1 Scope
This part of ISO 4892 specifies methods for exposing specimens to xenon-arc light in the presence
of moisture to reproduce the weathering effects (temperature, humidity and/or wetting) that occur
when materials are exposed in actual end-use environments to daylight or to daylight filtered through
window glass.
Specimen preparation and evaluation of the results are covered in other International Standards for
specific materials.
General guidance is given in ISO 4892-1.
NOTE Xenon-arc exposures of paints and varnishes are described in ISO 11341.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
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
ISO 9370, Plastics — Instrumental determination of radiant exposure in weathering tests — General
guidance and basic test method
3 Principle
3.1 A xenon arc, fitted with filters, is used to simulate the relative spectral irradiance of daylight in the
ultraviolet (UV) and visible regions of the spectrum.
3.2 Specimens are exposed to various levels of light, heat, relative humidity and water (see 3.4) under
controlled environmental conditions.
3.3 The exposure conditions are varied by selection of
a) the light filter(s);
b) the irradiance level;
c) the temperature during exposure to light;
d) the relative humidity in the chamber during light and dark exposures, when exposure conditions
requiring control of humidity are used;
e) the way the test specimens are wetted (see 3.4);
© ISO 2013 – All rights reserved 1
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SIST EN ISO 4892-2:2013
ISO 4892-2:2013(E)
f) the water temperature and wetting cycle;
g) the relative lengths of the light and dark periods.
3.4 Wetting is produced by spraying the test specimens with demineralized/deionized water, by
immersion in water or by condensation of water vapour onto the surfaces of the specimens.
3.5 The procedure includes measurements of the UV irradiance and UV radiant exposure in the plane
of the specimens.
3.6 It is recommended that a similar material of known performance (a control) be exposed
simultaneously with the test specimens to provide a standard for comparative purposes.
3.7 Intercomparison of results obtained from specimens exposed in different apparatus should not be
made unless an appropriate statistical relationship has been established between the apparatuses for the
particular material exposed.
4 Apparatus
4.1 Laboratory light source
4.1.1 General
The light source shall comprise one or more quartz-jacketed xenon-arc lamps which emit radiation from
below 270 nm in the ultraviolet through the visible spectrum and into the infrared. In order to simulate
daylight, filters shall be used to remove short-wavelength UV radiation (method A, see Table 1). Filters
to minimize irradiance at wavelengths shorter than 310 nm shall be used to simulate daylight through
window glass (method B, see Table 2). In addition, filters to remove infrared radiation may be used to
prevent unrealistic heating of the test specimens, which can cause thermal degradation not experienced
during outdoor exposures.
NOTE Solar spectral irradiance for a number of different atmospheric conditions is described in CIE Publication
No. 85. The benchmark daylight used in this part of ISO 4892 is that defined in Table 4 in CIE No. 85:1989.
4.1.2 Spectral irradiance of xenon-arc lamps with daylight filters
Filters are used to filter xenon-arc emissions in order to simulate daylight (CIE Publication No. 85:1989,
Table 4). The minimum and maximum levels of the relative spectral irradiance in the UV wavelength
range are given in Table 1 (see also Annex A).
2 © ISO 2013 – All rights reserved
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SIST EN ISO 4892-2:2013
ISO 4892-2:2013(E)
ab
Table 1 — Relative spectral irradiance of xenon-arc lamps with daylight filters (method A)
c de c
Spectral passband Minimum CIE No. 85:1989, Table 4 Maximum
(λ = wavelength in nm) % % %
λ < 290 0,15
290 ≤ λ ≤ 320 2,6 5,4 7,9
320 < λ ≤ 360 28,2 38,2 39,8
360 < λ ≤ 400 54,2 56,4 67,5
a
This table gives the irradiance in the given passband, expressed as a percentage of the total irradiance between 290 nm
and 400 nm. To determine whether a specific filter or set of filters for a xenon-arc lamp meets the requirements of this table,
the spectral irradiance must be measured from 250 nm to 400 nm. The total irradiance in each wavelength passband is then
summed and divided by the total irradiance from 290 nm to 400 nm. Typically, this is done in 2 nm increments.
b
The minimum and maximum limits in this table are based on more than 100 spectral irradiance measurements with
[3]
water- and air-cooled xenon-arc lamps with daylight filters from different production lots and of various ages, used in
accordance with the recommendations of the manufacturer. As more spectral irradiance data become available, minor
changes in the limits are possible. The minimum and maximum limits are at least three sigma from the mean for all the
measurements.
c
The minimum and maximum columns will not necessarily sum to 100 % because they represent the minima and maxima
for the measurement data used. For any individual spectral irradiance, the percentages calculated for the passbands in this
table will sum to 100 %. For any individual xenon-arc lamp with daylight filters, the calculated percentage in each passband
shall fall within the minimum and maximum limits given. Exposure results can be expected to differ if obtained using
xenon-arc apparatus in which the spectral irradiances differ by as much as that allowed by the tolerances. Contact the
manufacturer of the xenon-arc apparatus for specific spectral irradiance data for the xenon-arc lamp and filters used.
d
The data from Table 4 in CIE Publication No. 85:1989 is the global solar irradiance on a horizontal surface for an air
mass of 1,0, an ozone column of 0,34 cm at STP, 1,42 cm of precipitable water vapour and a spectral optical depth of aerosol
extinction of 0,1 at 500 nm. These data are target values for xenon-arc lamps with daylight filters.
e
For the solar spectrum represented by Table 4 in CIE No. 85:1989, the UV irradiance (between 290 nm and 400 nm) is
11 % and the visible irradiance (between 400 nm and 800 nm) is 89 %, expressed as a percentage of the total irradiance
between 290 nm and 800 nm. The percentage of the UV irradiance and that of the visible irradiance incident on specimens
exposed in xenon-arc apparatus might vary due to the number of specimens being exposed and their reflectance properties.
4.1.3 Spectral irradiance of xenon-arc lamps with window glass filters
Filters are used to filter the xenon-arc lamp emissions in order to simulate daylight which has passed
through window glass. The minimum and maximum levels of the relative spectral irradiance in the UV
region are given in Table 2 (see also Annex A).
ab
Table 2 — Relative spectral irradiance for xenon-arc lamps with window glass filters (method B)
CIE No. 85:1989, Table 4, plus
c c
Spectral passband Minimum Maximum
de
effect of window glass
(λ = wavelength in nm) % %
%
λ < 300 0,29
300 ≤ λ ≤ 320 0,1 ≤ 1 2,8
320 < λ ≤ 360 23,8 33,1 35,5
© ISO 2013 – All rights reserved 3
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SIST EN ISO 4892-2:2013
ISO 4892-2:2013(E)
Table 2 (continued)
CIE No. 85:1989, Table 4, plus
c c
Spectral passband Minimum Maximum
de
effect of window glass
(λ = wavelength in nm) % %
%
360 < λ ≤400 62,4 66,0 76,2
a
This table gives the irradiance in the given passband, expressed as a percentage of the total irradiance
between 290 nm and 400 nm. To determine whether a specific filter or set of filters for a xenon-arc lamp meets
the requirements of this table, the spectral irradiance must be measured from 250 nm to 400 nm. The total
irradiance in each passband is then summed and divided by the total irradiance between 290 nm and 400 nm.
Typically, this is done in 2 nm increments.
b
The minimum and maximum limits in this table are based on more than 30 spectral irradiance meas-
urements with water- and air-cooled xenon-arc lamps with window glass filters from different production lots
[3]
and of various ages, used in accordance with the recommendations of the manufacturer. As more spectral
irradiance data become available, minor changes in the limits are possible. The minimum and maximum limits
are at least three sigma from the mean for all the measurements.
c
The minimum and maximum columns will not necessarily sum to 100 % because they represent the
minima and maxima for the data used. For any individual spectral irradiance, the percentages calculated for
the passbands in this table will sum to 100 %. For any individual xenon-arc lamp with window glass filters, the
calculated percentage in each passband shall fall within the minimum and maximum limits given. Exposure
results can be expected to differ if obtained using xenon-arc apparatus in which the spectral irradiances differ
by as much as that allowed by the tolerances. Contact the manufacturer of the xenon-arc apparatus for specific
spectral irradiance data for the xenon-arc lamp and filters used.
d
The data from Table 4 in CIE No. 85:1989 plus the effect of window glass was determined by mul-
tiplying the CIE No. 85:1989, Table 4, data by the spectral transmittance of 3-mm-thick window glass (see
ISO 11341). These data are target values for xenon-arc lamps with window glass filters.
e
For the CIE No. 85:1989 plus window glass data, the UV irradiance between 300 nm and 400 nm is typ-
ically about 9 % and the visible irradiance (between 400 nm and 800 nm) is typically about 91 %, expressed as
a percentage of the total irradiance between 300 nm and 800 nm. The percentage of the UV irradiance and that
of the visible irradiance incident on specimens exposed in xenon-arc apparatus might vary due to the number
of specimens being exposed and their reflectance properties.
4.1.4 Irradiance uniformity
The irradiance at any position in the area used for specimen exposure shall be at least 80 % of the
maximum irradiance. Requirements for periodic repositioning of specimens when this requirement is
not met are described in ISO 4892-1.
NOTE For some materials of high reflectivity, high sensitivity to irradiance and temperature, periodic
repositioning of specimens is recommended to ensure uniformity of exposures, even when the irradiance
uniformity in the exposure area is within the limits so that repositioning is not required.
4.2 Test chamber
The design of the test chamber may vary, but it shall be constructed from inert material. In addition
to the controlled irradiance, the test chamber shall provide for control of temperature. For exposures
that require control of humidity, the test chamber shall include humidity-control facilities that meet
the requirements of ISO 4892-1. When required by the exposure used, the apparatus shall also include
facilities for the provision of water spray or the formation of condensate on the surface of the test
specimens, or for the immersion of the specimens in water. Water used for water spray shall meet the
requirements of ISO 4892-1.
The light source(s) shall be located, with respect to the specimens, such that the irradiance at the
specimen surface complies with 6.1.
NOTE If the lamp system (one or more lamps) is centrally positioned in the chamber, the effect of any
eccentricity of the lamp(s) on the uniformity of exposure can be reduced by using a rotating frame carrying the
specimens or by repositioning or rotating the lamps.
4 © ISO 2013 – All rights reserved
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SIST EN ISO 4892-2:2013
ISO 4892-2:2013(E)
Should any ozone be generated from operation of the lamp(s), the lamp(s) shall be isolated from the test
specimens and operating personnel. If the ozone is in an air stream, it shall be vented directly to the
outside of the building.
4.3 Radiometer
When a radiometer is used, it shall comply with the requirements outlined in ISO 4892-1 and ISO 9370.
4.4 Black-standard/black-panel thermometer
The black-standard or black-panel thermometer used shall comply with the requirements for these
devices given in ISO 4892-1.
The preferred maximum surface temperature device is the black-standard thermometer. The relevant
cycles are described in Table 3 and Table B.1.
4.5 Wetting and humidity-control equipment
4.5.1 General
Specimens may be exposed to moisture in the form of water spray or condensation, or by immersion.
Specific exposure conditions using water spray are described in Table 3 (see also Table B.1) and Table 4
(see also Table B.2). If condensation, immersion or other methods are used to expose the specimens to
moisture, details of the procedures and exposure conditions used shall be included in the exposure report.
Table 3 and Table 4 also describe exposure conditions in which the relative humidity is controlled.
Table B.1 and Table B.2 describe exposure conditions in which humidity control is not required.
NOTE The relative humidity of the air can have a significant influence on the photodegradation of polymers.
4.5.2 Relative-humidity control equipment
For exposures where relative-humidity control is required, the location of the sensors used to measure
the humidity shall be as specified in ISO 4892-1.
4.5.3 Spray system
The test chamber may be equipped with a means of directing an intermittent water spray onto the fronts
or backs of the test specimens under specified conditions. The spray shall be uniformly distributed
over the specimens. The spray system shall be made from corrosion-resistant materials that do not
contaminate the water employed.
The water sprayed onto the specimen surfaces shall have a conductivity below 5 µS/cm, contain less
than 1 µg/g dissolved solids and leave no observable stains or deposits on the specimens. Care shall
be taken to keep silica levels below 0,2 µg/g. A combination of deionization and reverse osmosis can be
used to produce water of the desired quality.
4.6 Specimen holders
Specimen holders may be in the form of an open frame, leaving the backs of the specimens exposed, or
they may provide the specimens with a solid backing. They shall be made from inert materials that will
not affect the results of the exposure, for example non-oxidizing alloys of aluminium or stainless steel.
Brass, steel or copper shall not be used in the vicinity of the test specimens. The backing used might
affect the results, as might any space between the backing and the test specimen, particularly with
transparent specimens, and shall be agreed on between the interested parties.
© ISO 2013 – All rights reserved 5
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SIST EN ISO 4892-2:2013
ISO 4892-2:2013(E)
4.7 Apparatus to assess changes in properties
If an International Standard relating to the determination of the properties chosen for monitoring the
changes in properties exists (see, in particular, ISO 4582), the apparatus specified by the International
Standard concerned shall be used.
...
SLOVENSKI STANDARD
oSIST prEN ISO 4892-2:2011
01-maj-2011
Polimerni materiali - Metode izpostavitve laboratorijskim virom svetlobe - 2. del:
Ksenonske svetilke (ISO/DIS 4892-2:2011)
Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps
(ISO/DIS 4892-2:2011)
Kunststoffe - Künstliches Bestrahlen oder Bewittern in Geräten - Teil 2:
Xenonbogenlampen (ISO/DIS 4892-2:2011)
Plastiques - Méthodes d'exposition à des sources lumineuses de laboratoire - Partie 2:
lampes à arc au xénon (ISO/DIS 4892-2:2011)
Ta slovenski standard je istoveten z: prEN ISO 4892-2
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
oSIST prEN ISO 4892-2:2011 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
---------------------- Page: 1 ----------------------
oSIST prEN ISO 4892-2:2011
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oSIST prEN ISO 4892-2:2011
EUROPEAN STANDARD
DRAFT
prEN ISO 4892-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2011
ICS 83.080.01 Will supersede EN ISO 4892-2:2006
English Version
Plastics - Methods of exposure to laboratory light sources - Part
2: Xenon-arc lamps (ISO/DIS 4892-2:2011)
Plastiques - Méthodes d'exposition à des sources Kunststoffe - Künstliches Bestrahlen oder Bewittern in
lumineuses de laboratoire - Partie 2: lampes à arc au Geräten - Teil 2: Xenonbogenlampen (ISO/DIS 4892-
xénon (ISO/DIS 4892-2:2011) 2:2011)
This draft European Standard is submitted to CEN members for parallel enquiry. It has been drawn up by the Technical Committee
CEN/TC 249.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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,
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© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 4892-2:2011: E
worldwide for CEN national Members.
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oSIST prEN ISO 4892-2:2011
prEN ISO 4892-2:2011 (E)
Contents Page
Foreword .3
2
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oSIST prEN ISO 4892-2:2011
prEN ISO 4892-2:2011 (E)
Foreword
This document (prEN ISO 4892-2:2011) 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 document is currently submitted to the parallel Enquiry.
This document will supersede EN ISO 4892-2:2006.
Endorsement notice
The text of ISO/DIS 4892-2:2011 has been approved by CEN as a prEN ISO 4892-2:2011 without any
modification.
3
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oSIST prEN ISO 4892-2:2011
DRAFT INTERNATIONAL STANDARD ISO/DIS 4892-2
ISO/TC 61/SC 6 Secretariat: DIN
Voting begins on Voting terminates on
2011-01-06 2011-06-06
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION • МЕЖДУНАРОДНАЯ ОРГАНИЗАЦИЯ ПО СТАНДАРТИЗАЦИИ • ORGANISATION INTERNATIONALE DE NORMALISATION
Plastics — Methods of exposure to laboratory light sources —
Part 2:
Xenon-arc lamps
Plastiques — Méthodes d'exposition à des sources lumineuses de laboratoire —
Partie 2: Lampes à arc au xénon
(Revision of second edition of ISO 4892-2:2006 and of ISO 4892-2:2006/Amd.1:2009)
ICS 83.080.01
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for Standardization (ISO), and
processed under the ISO-lead mode of collaboration as defined in the Vienna Agreement.
This draft is hereby submitted to the ISO member bodies and to the CEN member bodies for a parallel
five-month enquiry.
Should this draft be accepted, a final draft, established on the basis of comments received, will be
submitted to a parallel two-month approval vote in ISO and formal vote in CEN.
To expedite distribution, this document is circulated as received from the committee
secretariat. ISO Central Secretariat work of editing and text composition will be undertaken at
publication stage.
Pour accélérer la distribution, le présent document est distribué tel qu'il est parvenu du
secrétariat du comité. Le travail de rédaction et de composition de texte sera effectué au
Secrétariat central de l'ISO au stade de publication.
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 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
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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.
© International Organization for Standardization, 2011
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ii © ISO 2011 – All rights reserved
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Contents Page
Foreword .iv
1 Scope.1
2 Normative references.1
3 Principle.1
4 Apparatus.2
5 Test specimens.6
6 Exposure conditions .6
7 Procedure.9
8 Exposure report.9
Annex A (informative) Filtered xenon-arc radiation — Spectral power distribution.10
Annex B (normative) Additional exposure cycles.11
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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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 4892-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 6, Plastics -
Ageing, Chemical and Environmental Resistance.
This second edition cancels and replaces the first edition (ISO 4892-2:2006), of which two high temperature
cycles in Table 3 and Table 4 for method A have] been technically revised. An amendment which describes
exposure cycles for method A and method B with the use of black-panel sensors is incorporated in the normal
text as Table 4 and Table B.2. The cycles from Table 3 and Table 4 with uncontrolled chamber temperature
and uncontrolled humidity are moved to an normative Annex B.
ISO 4892 consists of the following parts, under the general title Plastics — Methods of exposure to laboratory
light sources :
⎯ Part 1: General guidance
⎯ Part 2: Xenon-arc lamps
⎯ Part 3: Fluorescent UV lamps
⎯ Part 4: Open-flame carbon-arc lamps
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Plastics — Methods of exposure to laboratory light sources —
Part 2:
Xenon-arc lamps
1 Scope
This part of ISO 4892 specifies methods for exposing specimens to xenon-arc light in the presence of
moisture to reproduce the weathering effects that occur when materials are exposed in actual end-use
environments to daylight or to daylight filtered through window glass.
The specimens are exposed to filtered xenon-arc light under controlled conditions (temperature, humidity
and/or wetting). Various types of xenon-arc light source and various filter combinations may be used to meet
different requirements.
Specimen preparation and evaluation of the results are covered in other International Standards for specific
materials.
General guidance is given in ISO 4892-1.
NOTE Xenon-arc exposures of paints and varnishes are described in ISO 11341.
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 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
ISO 9370, Plastics — Instrumental determination of radiant exposure in weathering tests — General guidance
and basic test method"
3 Principle
3.1 A xenon arc, fitted with suitable filters and properly maintained, is used to simulate the spectral power
distribution of daylight in the ultraviolet (UV) and visible regions of the spectrum.
3.2 Specimens are exposed to various levels of light, heat, relative humidity and water (see 3.4) under
controlled environmental conditions.
3.3 The exposure conditions may be varied by selection of
a) the light filter(s);
b) the irradiance level;
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c) the temperature during exposure to light;
d) the relative humidity in the chamber during light and dark exposures, when exposure conditions requiring
control of humidity are used;
e) the way the test specimens are wetted (see 3.4);
f) the water temperature and wetting cycle;
g) the relative lengths of the light and dark periods.
3.4 Wetting is usually produced by spraying the test specimens with demineralized/deionized water, by
immersion in water or by condensation of water vapour onto the surfaces of the specimens.
3.5 The procedure shall include measurements of the irradiance and radiant exposure in the plane of the
specimens.
3.6 It is recommended that a similar material of known performance (a control) be exposed simultaneously
with the test specimens to provide a standard for comparative purposes.
3.7 Intercomparison of results obtained from specimens exposed in different apparatus should not be made
unless an appropriate statistical relationship has been established between the apparatuses for the particular
material exposed.
4 Apparatus
4.1 Laboratory light source
4.1.1 General
The light source shall comprise one or more quartz-jacketed xenon-arc lamps which emit radiation from below
270 nm in the ultraviolet through the visible spectrum and into the infrared. In order to simulate daylight, filters
shall be used to remove short-wavelength UV radiation (method A, see Table 1). Filters to minimize irradiance
at wavelengths shorter than 310 nm shall be used to simulate daylight through window glass (method B, see
Table 2). In addition, filters to remove infrared radiation may be used to prevent unrealistic heating of the test
specimens, which can cause thermal degradation not experienced during outdoor exposures.
NOTE Solar spectral irradiance for a number of different atmospheric conditions is described in CIE Publication
No. 85. The benchmark daylight used in this part of ISO 4892 is that defined in Table 4 in CIE No. 85:1989.
4.1.2 Spectral irradiance of xenon-arc lamps with daylight filters
Filters are used to filter xenon-arc emissions in order to simulate daylight (CIE Publication No. 85:1989,
Table 4). The minimum and maximum levels of the relative spectral irradiance in the UV wavelength range are
given in Table 1 (see also Annex A).
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a, b
Table 1 — Relative spectral irradiance of xenon-arc lamps with daylight filters (method A)
c d, e c
Spectral passband Minimum CIE No. 85:1989, Table 4 Maximum
(λ = wavelength in nm) % % %
λ < 290 0,15
≤
290 λ ≤ 320 2,6 5,4 7,9
320 < λ ≤ 360 28,2 38,2 39,8
≤
360 < λ 400 54,2 56,4 67,5
a
This table gives the irradiance in the given passband, expressed as a percentage of the total irradiance between
290 nm and 400 nm. To determine whether a specific filter or set of filters for a xenon-arc lamp meets the
requirements of this table, the spectral irradiance must be measured from 250 nm to 400 nm. The total irradiance in
each wavelength passband is then summed and divided by the total irradiance from 290 nm to 400 nm.
b
The minimum and maximum limits in this table are based on more than 100 spectral irradiance measurements
[3]
with water- and air-cooled xenon-arc lamps with daylight filters from different production lots and of various ages ,
used in accordance with the recommendations of the manufacturer. As more spectral irradiance data become
available, minor changes in the limits are possible. The minimum and maximum limits are at least three sigma from the
mean for all the measurements.
c
The minimum and maximum columns will not necessarily sum to 100 % because they represent the minima and
maxima for the measurement data used. For any individual spectral irradiance, the percentages calculated for the
passbands in this table will sum to 100 %. For any individual xenon-arc lamp with daylight filters, the calculated
percentage in each passband shall fall within the minimum and maximum limits given. Exposure results can be
expected to differ if obtained using xenon-arc apparatus in which the spectral irradiances differ by as much as that
allowed by the tolerances. Contact the manufacturer of the xenon-arc apparatus for specific spectral irradiance data
for the xenon-arc lamp and filters used.
d
The data from Table 4 in CIE Publication No. 85:1989 is the global solar irradiance on a horizontal surface for an
air mass of 1,0, an ozone column of 0,34 cm at STP, 1,42 cm of precipitable water vapour and a spectral optical depth
of aerosol extinction of 0,1 at 500 nm. These data are target values for xenon-arc lamps with daylight filters.
e
For the solar spectrum represented by Table 4 in CIE No. 85:1989, the UV irradiance (between 290 nm and
400 nm) is 11 % and the visible irradiance (between 400 nm and 800 nm) is 89 %, expressed as a percentage of the
total irradiance between 290 nm and 800 nm. The percentage of the UV irradiance and that of the visible irradiance
incident on specimens exposed in xenon-arc apparatus may vary due to the number of specimens being exposed and
their reflectance properties.
4.1.3 Spectral irradiance of xenon-arc lamps with window glass filters
Filters are used to filter the xenon-arc lamp emissions in order to simulate daylight which has passed through
window glass. The minimum and maximum levels of the relative spectral irradiance in the UV region are given
in Table 2 (see also Annex A).
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a, b
Table 2 — Relative spectral irradiance for xenon-arc lamps with window glass filters (method B)
c c
Spectral passband Minimum CIE No. 85:1989, Table 4 Maximum
d, e
plus effect of window glass
(λ = wavelength in nm) % % %
λ < 300 0,29
300 ≤ λ ≤ 320 0,1 ≤ 1 2,8
320 < λ ≤ 360 23,8 33,1 35,5
≤
360 < λ 400 62,4 66,0 76,2
a
This table gives the irradiance in the given passband, expressed as a percentage of the total irradiance between
290 nm and 400 nm. To determine whether a specific filter or set of filters for a xenon-arc lamp meets the
requirements of this table, the spectral irradiance must be measured from 250 nm to 400 nm. The total irradiance in
each passband is then summed and divided by the total irradiance between 290 nm and 400 nm.
b
The minimum and maximum limits in this table are based on more than 30 spectral irradiance measurements with
[3]
water- and air-cooled xenon-arc lamps with window glass filters from different production lots and of various ages ,
used in accordance with the recommendations of the manufacturer. As more spectral irradiance data become
available, minor changes in the limits are possible. The minimum and maximum limits are at least three sigma from the
mean for all the measurements.
c
The minimum and maximum columns will not necessarily sum to 100 % because they represent the minima and
maxima for the data used. For any individual spectral irradiance, the percentages calculated for the passbands in this
table will sum to 100 %. For any individual xenon-arc lamp with window glass filters, the calculated percentage in each
passband shall fall within the minimum and maximum limits given. Exposure results can be expected to differ if
obtained using xenon-arc apparatus in which the spectral irradiances differ by as much as that allowed by the
tolerances. Contact the manufacturer of the xenon-arc apparatus for specific spectral irradiance data for the xenon-arc
lamp and filters used.
d
The data from Table 4 in CIE No. 85:1989 plus the effect of window glass was determined by multiplying the CIE
No. 85:1989, Table 4, data by the spectral transmittance of 3-mm-thick window glass (see ISO 11341). These data are
target values for xenon-arc lamps with window glass filters.
e
For the CIE No. 85:1989 plus window glass data, the UV irradiance between 300 nm and 400 nm is typically
about 9 % and the visible irradiance (between 400 nm and 800 nm) is typically about 91 %, expressed as a
percentage of the total irradiance between 300 nm and 800 nm. The percentage of the UV irradiance and that of the
visible irradiance incident on specimens exposed in xenon-arc apparatus may vary due to the number of specimens
being exposed and their reflectance properties.
4.1.4 Irradiance uniformity
The irradiance at any position in the area used for specimen exposure shall be at least 80 % of the maximum
irradiance. Requirements for periodic repositioning of specimens when this requirement is not met are
described in ISO 4892-1.
NOTE For some materials of high reflectivity, high sensitivity to irradiance and temperature, periodic repositioning of
specimens is recommended to ensure uniformity of exposures, even when the irradiance uniformity in the exposure area
is within the limits so that repositioning is not required.
4.2 Test chamber
The design of the test chamber may vary, but it shall be constructed from inert material. In addition to the
controlled irradiance, the test chamber shall provide for control of temperature. For exposures that require
control of humidity, the test chamber shall include humidity-control facilities that meet the requirements of
ISO 4892-1. When required by the exposure used, the apparatus shall also include facilities for the provision
of water spray or the formation of condensate on the surface of the test specimens, or for the immersion of the
specimens in water. Water used for water spray shall meet the requirements of ISO 4892-1.
The light source(s) shall be located, with respect to the specimens, such that the irradiance at the specimen
surface complies with 6.1.
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NOTE If the lamp system (one or more lamps) is centrally positioned in the chamber, the effect of any eccentricity of
the lamp(s) on the uniformity of exposure may be reduced by using a rotating frame carrying the specimens or by
repositioning or rotating the lamps.
Should any ozone be generated from operation of the lamp(s), the lamp(s) shall be isolated from the test
specimens and operating personnel. If the ozone is in an air stream, it shall be vented directly to the outside of
the building.
4.3 Radiometer
When a radiometer is used, it shall comply with the requirements outlined in ISO 4892-1 and ISO 9370.
4.4 Black-standard/black-panel thermometer
The black-standard or black-panel thermometer used shall comply with the requirements for these devices
given in ISO 4892-1.
NOTE The preferred maximum surface temperature device is the black-standard thermometer. The cycles
are described in Table 3 and Table B.1.
4.5 Wetting and humidity-control equipment
4.5.1 General
Specimens may be exposed to moisture in the form of water spray or condensation, or by immersion. Specific
exposure conditions using water spray are described in Table 3 (see also Annex B Table B.1) and Table 4
(see also Annex B Table B.2). If condensation, immersion or other methods are used to expose the
specimens to moisture, details of the procedures and exposure conditions used shall be included in the
exposure report.
Table 3 and Table 4 also describe exposure conditions in which the relative humidity is controlled. Table B.1
and Table B.2 in Annex B describe exposure conditions in which humidity control is not required.
NOTE The relative humidity of the air can have a significant influence on the photodegradation of polymers.
4.5.2 Relative-humidity control equipment
For exposures where relative-humidity control is required, the location of the sensors used to measure the
humidity shall be as specified in ISO 4892-1.
4.5.3 Spray system
The test chamber shall be equipped with a means of directing an intermittent water spray onto the fronts or
backs of the test specimens under specified conditions. The spray shall be uniformly distributed over the
specimens. The spray system shall be made from corrosion-resistant materials that do not contaminate the
water employed.
The water sprayed onto the specimen surfaces shall have a conductivity below 5 µS/cm, contain less than
1 µg/g dissolved solids and leave no observable stains or deposits on the specimens. Care shall be taken to
keep silica levels below 0,2 µg/g. A combination of deionization and reverse osmosis can be used to produce
water of the desired quality.
4.6 Specimen holders
Specimen holders may be in the form of an open frame, leaving the backs of the specimens exposed, or they
may provide the specimens with a solid backing. They shall be made from inert materials that will not affect
the results of the exposure, for example non-oxidizing alloys of aluminium or stainless steel. Brass, steel or
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copper shall not be used in the vicinity of the test specimens. The backing used may affect the results, as may
any space between the backing and the test specimen, particularly with transparent specimens, and shall be
agreed on between the interested parties.
4.7 Apparatus to assess changes in properties
The apparatus required by the International Standards relating to the determination of the properties chosen
for monitoring (see also ISO 4582) shall be used.
5 Test specimens
Refer to ISO 4892-1.
6 Exposure conditions
6.1 Radiation
Unless otherwise specified, control the irradiance at the levels indicated in Table 3 (see also Annex B
Table B.1) and Table 4 (see also Annex B Table B.2). Other irradiance levels may be used when agreed on
by the interested parties. The irradiance, and the pass band in which it was measured, shall be included in the
exposure report.
6.2 Temperature
6.2.1 Black-standard/black-panel temperature
For referee purposes, Table 3 and Table B.1 in Annex B specifies black-standard temperatures. For normal
work, black-panel thermometers may be used in place of black-standard thermometers (see Table 4 and
Table B.2 in Annex B).
NOTE 1 If a black-panel thermometer is used, the temperature indicated will be 3 °C to 12 °C lower than that indicated
by a black-standard thermometer under typical exposure conditions.
If a black-panel thermometer is used, then the panel material, the type of temperature sensor and the way in
which the sensor is mounted on the panel shall be included in the exposure report.
NOTE 2 If higher temperatures are used as specified in Table 3 and Table 4 for special exposures, the tendency for
specimens to undergo thermal degradation will increase and this may affect the results of such exposures.
Other temperatures may be used when agreed on by the inter
...
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