1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 4892-2:2013Plastics Methods ofexposure to laboratory lightsourcesPart 2: Xenon-arc lamps (ISO 4892-2:2013)BS EN ISO 4892-2:2013 BRITISH STANDARDNational forewordThis Br
2、itish Standard is the UK implementation of EN ISO4892-2:2013. It supersedes BS EN ISO 4892-2:2006+A1:2009 which iswithdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/21, Testing of plastics.A list of organizations represented on this committee can beobtained on
3、request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 69490 5ICS 83.080.01Compliance with a Britis
4、h Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2013.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4892-2 March 20
5、13 ICS 83.080.01 Supersedes EN ISO 4892-2:2006English Version Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps (ISO 4892-2:2013) Plastiques - Mthodes dexposition des sources lumineuses de laboratoire - Partie 2: lampes arc au xnon (ISO 4892-2:2013) Kunststoffe - K
6、nstliches Bestrahlen oder Bewittern in Gerten - Teil 2: Xenonbogenlampen (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 sta
7、tus 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, G
8、erman). 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, Croa
9、tia, 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 U
10、nited Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4892-
11、2:2013: EBS EN ISO 4892-2:2013EN ISO 4892-2:2013 (E) 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 gi
12、ven 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 documen
13、t 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 b
14、ound 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, Portu
15、gal, 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. BS EN ISO 4892-2:2013ISO 4892-2:2013(E) ISO 2013 All rights reserved iiiContents PageFo
16、reword iv1 Scope . 12 Normative references 13 Principle 14 Apparatus . 24.1 Laboratory light source . 24.2 Test chamber 44.3 Radiometer . 54.4 Black-standard/black-panel thermometer . 54.5 Wetting and humidity-control equipment 54.6 Specimen holders . 54.7 Apparatus to assess changes in properties 6
17、5 Test specimens 66 Exposure conditions . 66.1 Radiation 66.2 Temperature 66.3 Relative humidity of chamber air . 76.4 Spray cycle 76.5 Cycles with dark periods 86.6 Sets of exposure conditions . 87 Procedure. 97.1 General . 97.2 Mounting the test specimens 97.3 Exposure . 97.4 Measurement of radian
18、t exposure . 97.5 Determination of changes in properties after exposure . 98 Exposure report 9Annex A (informative) Filtered xenon-arc radiation Relative spectral irradiance 10Annex B (normative) Additional exposure cycles 11Bibliography .13BS EN ISO 4892-2:2013ISO 4892-2:2013(E)ForewordISO (the Int
19、ernational 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 ha
20、s 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
21、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
22、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 a
23、ll 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 th
24、e 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 lampsiv ISO 2013 All rights r
25、eservedBS EN ISO 4892-2:2013INTERNATIONAL STANDARD ISO 4892-2:2013(E)Plastics Methods of exposure to laboratory light sources Part 2: Xenon-arc lamps1 ScopeThis part of ISO 4892 specifies methods for exposing specimens to xenon-arc light in the presence of moisture to reproduce the weathering effect
26、s (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 guidan
27、ce is given in ISO 4892-1.NOTE Xenon-arc exposures of paints and varnishes are described in ISO 11341.2 Normative referencesThe 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 cite
28、d 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 sourcesISO 4892-1, Pla
29、stics Methods of exposure to laboratory light sources Part 1: General guidanceISO 9370, Plastics Instrumental determination of radiant exposure in weathering tests General guidance and basic test method3 Principle3.1 A xenon arc, fitted with filters, is used to simulate the relative spectral irradia
30、nce 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 ofa) the light filter(s);b) the
31、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 1BS EN ISO 4892-2:201
32、3ISO 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
33、.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 Interc
34、omparison 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 Apparatus4.1 Laboratory light source4.1.1 GeneralThe light source shall com
35、prise 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 ir
36、radiance 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
37、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 filt
38、ersFilters 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 reservedBS EN ISO 4892-2
39、:2013ISO 4892-2:2013(E)Table 1 Relative spectral irradiance of xenon-arc lamps with daylight filtersab(method A)Spectral passband ( = wavelength in nm)Minimumc%CIE No. 85:1989, Table 4de%Maximumc% 290 0,15290 320 2,6 5,4 7,9320 360 28,2 38,2 39,8360 400 54,2 56,4 67,5aThis table gives the irradiance
40、 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 irradianc
41、e 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.bThe minimum and maximum limits in this table are based on more than 100 spectral irradiance measurements with water- and air-cooled xenon-arc lamps with
42、 daylight filters from different production lots and of various ages,3used 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 fo
43、r all the measurements.cThe 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 individu
44、al 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 tole
45、rances. Contact the manufacturer of the xenon-arc apparatus for specific spectral irradiance data for the xenon-arc lamp and filters used.dThe 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
46、 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.eFor the solar spectrum represented by Table 4 in CIE No. 85:1989, the UV irradiance (between 290 nm and 400 nm) is 1
47、1 % 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
48、 specimens being exposed and their reflectance properties.4.1.3 Spectral irradiance of xenon-arc lamps with window glass filtersFilters 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
49、spectral irradiance in the UV region are given in Table 2 (see also Annex A).Table 2 Relative spectral irradiance for xenon-arc lamps with window glass filtersab(method B)Spectral passband ( = wavelength in nm)Minimumc%CIE No. 85:1989, Table 4, plus effect of window glassde%Maximumc% 300 0,29300 320 0,1 1 2,8320 360 23,8 33,1 35,5 ISO 2013 All rights reserved 3BS EN ISO 4892-2:2013ISO 4892-2:2013(E)Spectral passband ( = wavelength in nm)Minimumc%CIE No. 85:1989, Table 4, plus effect of window glas
