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1、BRITISH STANDARD BS EN ISO 4892-2:2006 Plastics Methods of exposure to laboratory light sources Part 2: Xenon-arc lamps The European Standard EN ISO 4892-2:2006 has the status of a British Standard ICS 83.080.01 ? BS EN ISO 4892-2:2006 This British Standard was published under the authority of the S
2、tandards Policy and Strategy Committee on 10 March 2006 BSI 10 March 2006 ISBN 0 580 47184 5 National foreword This British Standard is the official English language version of EN ISO 4892-2:2006. It is identical with ISO 4892-2:2006. It supersedes BS EN ISO 4892-2:2000 which is withdrawn. The UK pa
3、rticipation in its preparation was entrusted to Technical Committee PRI/21, Testing of plastics, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or
4、 European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to incl
5、ude all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enqui
6、ries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page,
7、the ISO title page, pages ii to iv, pages 1 to 10, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS
8、O 4892-2 February 2006 ICS 83.080.01Supersedes EN ISO 4892-2:1999 English Version Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc lamps (ISO 4892-2:2006) Plastiques - Mthodes dexposition des sources lumineuses de laboratoire - Partie 2: Lampes arc au xnon (ISO 4892-2:2
9、006) Kunststoffe - Knstliches Bestrahlen oder Bewittern in Gerten - Teil 2: Xenonbogenlampen (ISO 4892-2:2006) This European Standard was approved by CEN on 28 October 2005. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europ
10、ean 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 Central Secretariat or to any CEN member. This European Standard exists in three official versions (English,
11、 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech
12、Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPE
13、N DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2006 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4892-2:2006: E EN ISO 4892-2:2006 Foreword This document (EN ISO 4892-
14、2:2006) 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 IBN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by en
15、dorsement, at the latest by August 2006, and conflicting national standards shall be withdrawn at the latest by August 2006. This document supersedes EN ISO 4892-2:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to im
16、plement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and Uni
17、ted Kingdom. Endorsement notice The text of ISO 4892-2:2006 has been approved by CEN as EN ISO 4892-2:2006 without any modifications. Reference number ISO 4892-2:2006(E) INTERNATIONAL STANDARD ISO 4892-2 Second edition 2006-02-01 Plastics Methods of exposure to laboratory light sources Part 2: Xenon
18、-arc lamps Plastiques Mthodes dexposition des sources lumineuses de laboratoire Partie 2: Lampes arc au xnon EN ISO 4892-2:2006 ii iii 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 8 8 Exposure rep
19、ort 8 Annex A (informative) Filtered xenon-arc radiation Spectral power distribution. 9 Bibliography. 10 EN ISO 4892-2:2006 iv Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Internati
20、onal 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 IS
21、O, 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 co
22、mmittees 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
23、 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 resi
24、stance. This second edition cancels and replaces the first edition (ISO 4892-2:1994), which has been technically revised. 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
25、3: Fluorescent UV lamps Part 4: Open-flame carbon-arc lamps EN ISO 4892-2:2006 1 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 wea
26、thering 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 so
27、urce 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 descr
28、ibed 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 458
29、2, 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 3 Principle 3.1 A xenon arc, fitted with su
30、itable 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 condit
31、ions. 3.3 The exposure conditions may be varied by selection of a) the light filter(s); b) the irradiance level; EN ISO 4892-2:2006 2 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 hu
32、midity 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 conde
33、nsation of water vapour onto the surfaces of the specimens. 3.5 The procedure may 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 specimen
34、s 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
35、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-wavelen
36、gth 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 specim
37、ens, 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. 85:198
38、9. 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
39、1 (see also Annex A). EN ISO 4892-2:2006 3 Table 1 Relative spectral irradiance of xenon-arc lamps with daylight filters a, b (method A) Spectral passband ( = wavelength in nm) Minimum c % CIE No. 85:1989, Table 4 d, e % Maximum c % 290 0,15 290 u u 320 2,6 5,4 7,9 320 u 360 28,2 38,2 39,8 360 u 400
40、 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 me
41、asured 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 with water- and air-cooled xenon-arc lam
42、ps with daylight filters from different production lots and of various ages 3, 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 th
43、e 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 a
44、ny 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
45、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
46、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 a
47、nd 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
48、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 o
49、f the relative spectral irradiance in the UV region are given in Table 2 (see also Annex A). EN ISO 4892-2:2006 4 Table 2 Relative spectral irradiance for xenon-arc lamps with window glass filters a, b (method B) Spectral passband Minimum c CIE No. 85:1989, Table 4 plus effect of window glass d, e Maximum c ( = wavelength in nm) % % % 300 0,29 300 u u 320 0,1 u 1 2,8 320 u 360 23,8 33,1 35,5 360 u 400 62,4 66,0 76,2 a This table give