1、BSI Standards PublicationBS EN ISO 4892-3:2016Plastics Methods ofexposure to laboratory lightsourcesPart 3: Fluorescent UV lampsBS EN ISO 4892-3:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO 4892-3:2016. It supersedes BS EN ISO 4892-3:2013 which iswit
2、hdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/21, Testing of plastics.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. U
3、sers are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 88549 5 ICS 83.080.01 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authorit
4、y of the Standards Policy and Strategy Committee on 31 March 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 4892-3 March 2016 ICS 83.080.01 Supersedes EN ISO 4892-3:2013English Version Plastics - Methods of expo
5、sure to laboratory light sources -Part 3: Fluorescent UV lamps (ISO 4892-3:2016) Plastiques - Mthodes dexposition des sources lumineuses de laboratoire - Partie 3: Lampes fluorescentes UV (ISO 4892-3:2016) Kunststoffe - Knstliches Bestrahlen oder Bewittern in Gerten - Teil 3: UV-Leuchtstofflampen (I
6、SO 4892-3:2016) This European Standard was approved by CEN on 23 January 2016. 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 bib
7、liographical 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 respo
8、nsibility 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 Rep
9、ublic 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 COMIT EUROPEN DE NORM
10、ALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 4892-3:2016 EBS EN ISO 4892-3:2016EN ISO 4892-3:2016 (E) 3 European
11、foreword This document (EN ISO 4892-3:2016) 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 public
12、ation of an identical text or by endorsement, at the latest by September 2016, and conflicting national standards shall be withdrawn at the latest by September 2016. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENEL
13、EC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 4892-3:2013. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belg
14、ium, 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, Switze
15、rland, Turkey and the United Kingdom. Endorsement notice The text of ISO 4892-3:2016 has been approved by CEN as EN ISO 4892-3:2016 without any modification. BS EN ISO 4892-3:2016ISO 4892-3:2016(E)Foreword iv1 Scope . 12 Normative references 13 Principle 14 Apparatus . 24.1 Laboratory light source .
16、 24.2 Test chamber 54.3 Radiometer . 54.4 Black-panel/black-standard thermometer . 54.5 Wetting . 64.5.1 General 64.5.2 Spray and condensation system . 64.6 Specimen holders . 64.7 Apparatus to assess changes in properties 65 Test specimens 66 Test conditions . 76.1 Radiation 76.2 Temperature 76.3 C
17、ondensation and spray cycles . 76.4 Cycles with dark periods 76.5 Sets of exposure conditions . 77 Procedure. 87.1 General . 87.2 Mounting the test specimens 87.3 Exposure . 87.4 Measurement of radiant exposure . 97.5 Determination of changes in properties after exposure . 98 Exposure report 9Annex
18、A (informative) Relative irradiance of typical fluorescent UV lamps 10Bibliography .16 ISO 2016 All rights reserved iiiContents PageBS EN ISO 4892-3:2016ISO 4892-3:2016(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO memb
19、er 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, government
20、al and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance a
21、re described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is
22、drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or
23、on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assess
24、ment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 6, Ageing, chemical and environmental resist
25、ance.This fourth edition cancels and replaces the third edition (ISO 4892-3:2013), of which it constitutes a minor revision with the following change: in A.2.3, further information on lamp combination is added.ISO 4892 consists of the following parts, under the general title Plastics Methods of expo
26、sure 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 2016 All rights reservedBS EN ISO 4892-3:2016INTERNATIONAL STANDARD ISO 4892-3:2016(E)Plastics Methods of exposure to laboratory light sources Par
27、t 3: Fluorescent UV lamps1 ScopeThis part of ISO 4892 specifies methods for exposing specimens to fluorescent UV radiation, heat and water in apparatus designed to simulate the weathering effects that occur when materials are exposed in actual end-use environments to global solar radiation, or to so
28、lar radiation through window glass.The specimens are exposed to fluorescent UV lamps under controlled environmental conditions (temperature, humidity and/or water). Different types of fluorescent UV lamp can be used to meet all the requirements for testing different materials.Specimen preparation an
29、d evaluation of the results are covered in other International Standards for specific materials.General guidance is given in ISO 4892-1.NOTE Fluorescent UV lamp exposures for paints, varnishes and other coatings are described in ISO 11507.2 Normative referencesThe following documents, in whole or in
30、 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
31、colour and variations in properties after exposure to daylight under glass, natural weathering or laboratory light sourcesISO 4892-1, Plastics Methods of exposure to laboratory light sources Part 1: General guidance3 Principle3.1 Fluorescent UV lamps, when following the manufacturers recommendations
32、 for lamp maintenance and/or rotation, may be used to simulate the spectral irradiance of global solar radiation in the short wavelength ultraviolet (UV) region of the spectrum.3.2 Specimens are exposed to various levels of UV radiation, heat and moisture (see 3.4) under controlled environmental con
33、ditions.3.3 The exposure conditions may be varied by selection of the following:a) type of fluorescent UV lamp;b) irradiance level;c) temperature during the UV exposure;d) type of wetting (see 3.4); ISO 2016 All rights reserved 1BS EN ISO 4892-3:2016ISO 4892-3:2016(E)e) wetting temperature and cycle
34、;f) timing of the UV/dark cycle.3.4 Wetting is usually produced by condensation of water vapour on to the exposed specimen surface or by spraying the test specimens with demineralized/deionized water.3.5 The procedure(s) may include measurement of the irradiance and the radiant exposure in the plane
35、 of the specimen.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 types of apparatus or to differ
36、ent types of lamp should not be made unless an appropriate statistical relationship has been established between the different types of equipment for the material to be tested.4 Apparatus4.1 Laboratory light source4.1.1 Fluorescent UV lamps are fluorescent lamps in which radiant emission in the ultr
37、aviolet region of the spectrum, i.e. below 400 nm, makes up at least 80 % of the total light output. There are three types of fluorescent UV lamp used in this part of ISO 4892. UVA-340 (type 1A) fluorescent UV lamp: these lamps have a radiant emission below 300 nm of less than 1 % of the total light
38、 output, have an emission peak at 343 nm, and are more commonly identified as UVA-340 for simulation of global solar radiation from 300 nm to 340 nm (see Table 1). Figure A.1 is a graph of spectral irradiance from 250 nm to 400 nm of a typical UVA-340 (type 1A) fluorescent lamp compared to global so
39、lar radiation. UVA-351 (type 1B) fluorescent UV lamp: these lamps have a radiant emission below 310 nm of less than 1 % of the total light output, have a peak emission at 353 nm, and are more commonly identified as UVA-351 for simulation of the UV portion of solar radiation behind window glass (see
40、Table 2). Figure A.2 is a graph of spectral irradiance from 250 nm to 400 nm of a typical UVA-351 (type 1B) fluorescent UV lamp compared to global solar radiation filtered by window glass. UVB-313 (type 2) fluorescent UV lamp: these lamps are more commonly identified as UVB-313 and have a radiant em
41、ission below 300 nm that is more than 10 % of the total output and a peak emission at 313 nm (see Table 3). Figure A.3 is a graph of the spectral irradiance from 250 nm to 400 nm of two typical UVB-313 (type 2) fluorescent lamps compared to global solar radiation. UVB-313 (type 2) lamps may be used
42、only by agreement between the parties concerned. Such agreement shall be stated in the test report. Four different UV lamps used as one combination: these four different UV lamps are used together as one combination with a suited filter. See Figure A.4 in A.2.3.NOTE 1 UVB-313 (type 2) lamps have a s
43、pectral distribution of radiation, which peaks near the 313 nm mercury line and can emit radiation down to = 254 nm, which can initiate ageing processes that never occur in end-use environments.NOTE 2 The solar spectral irradiance for a number of different atmospheric conditions is described in CIE
44、Publication No. 85. The benchmark global solar radiation used in this part of ISO 4892 is from CIE Publication No. 85:1989, Table 4.4.1.2 Unless otherwise specified, UVA-340 (type 1A) fluorescent UV lamps shall be used to simulate the UV part of global solar radiation (see Table 4, method A). Unless
45、 otherwise specified, UVA-351 (type 1B) 2 ISO 2016 All rights reservedBS EN ISO 4892-3:2016ISO 4892-3:2016(E)lamps shall be used to simulate the UV part of solar radiation through window glass (see Table 4, method B). The four-lamp UV combination may be used (see A.2.3) and shall be stated in the te
46、st report.4.1.3 Fluorescent lamps age significantly with extended use. If an automatic irradiance control system is not used, follow the apparatus manufacturers instructions on the procedure necessary to maintain the desired irradiance.4.1.4 Irradiance uniformity shall be in accordance with the requ
47、irements specified in ISO 4892-1. Requirements for periodic repositioning of specimens when irradiance within the exposure area is less than 90 % of the peak irradiance are described in ISO 4892-1.Table 1 Relative ultraviolet spectral irradiance for UVA-340 (type 1A) lamps for global solar UV radiat
48、ion (method A)a,bSpectral passband = wavelength in nanometres (nm)Minimumc%CIE No. 85:1989, Table 4d,e%Maximumc% 290 0 0,1290 320 5,9 5,4 9,3320 360 60,9 38,2 65,5360 400 26,5 56,4 32,8aThis table gives the irradiance in the given passband, expressed as a percentage of the total irradiance between 2
49、90 nm and 400 nm. To determine whether or not a specific UVA-340 (type 1A) lamp meets the requirements of this table, the spectral irradiance from 250 nm to 400 nm shall be measured. Typically, this is done in 2 nm increments. The total irradiance in each passband is then summed and divided by the total irradiance between 290 nm and 400 nm.bThe minimum and maximum limits for UVA-340 (type 1A) lamps in this table are based on more than 60 spectral irradiance measurements with UVA-340 (type 1A) lamps from different
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