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)
ISO 4892-2:2013 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.
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 Xenon-bogenstrahlung, Feuchtigkeit ausgesetzt werden, um die Bewitterungseffekte (Temperatur, Luftfeuchte und/oder Benässung) nachzubilden, die auftreten, wenn Werkstoffe in realen, im Endgebrauch vorhandenen Umgebungen der Globalstrahlung oder Globalstrahlung hinter Fensterglas ausgesetzt sind.
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 [1] 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
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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.
Contents Page
Foreword . 3
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.
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
ISO 4892-2:2013(E)
© 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
Case postale 56 • CH-1211 Geneva 20
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
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 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
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 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
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 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 d
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...