ISO INTERNATIONAL STANDARD 4892-4 Third edition 2013-07-15 Plastics Methods of exposure to laboratory light sources - Part 4: Open-flame carbon-arc lamps Plastiques-Méthodes d'expositiona des sources lumineuses de laboratoire Partie4:Lampesaarcaucarbone Reference number IS0 4892-4:2013(E) LSO IS02013 IS0 4892-4:2013(E) COPYRIGHT PROTECTED DOCUMENT IS02013 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-1211Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii IS04892-4:2013(E) Contents Page Foreword iv 1 Scope. .1 2 Normativereferences .1 3 Principle 1 4 Apparatus 2 4.1 Laboratorylightsource 2 4.2 Test chamber. 6 4.3 7 Radiometer 4.4 Thermometer 7 4.5 Moisture. 7 4.6 Specimen holders 7 4.7 Apparatustoassesschangesinproperties 7 5 Test specimens 8 6 Testconditions 8 6.1 Temperature 8 6.2 Relative humidity of air. 8 6.3 Spray cycle 8 6.4 Cycles with dark periods 8 7 Procedure. 9 7.1 Mountingthetestspecimens 6 7.2 Exposure 9 7.3 Measurementofradiantexposure 9 7.4 Determination of changes in properties after exposure 9 8 Exposure report 9 Bibliography 10 iii IS0 4892-4:2013(E) Foreword Iso (the International Organizationfor Standardization) is a worldwide federation ofnational standards bodies (iso member bodies).The work of preparing International Standards is normally carried out throughIso technical committees.Each memberbody interested in a subject for whicha 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 closelywiththe InternationalElectrotechnical Commission (IEC) on all matters of electrotechnicalstandardization. The procedures used to develop this document and those intended for its further maintenance are described in theIso/IEc Directives, Part 1. In particular the different approval criteria needed for the differenttypes ofIsodocuments shouldbenoted.Thisdocumentwasdrafted in accordancewiththe editorialrules oftheISO/IEC Directives,Part2.www.iso.org/directives Attention is drawn to the possibilitythat some of the elements of this document maybe the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. Details of anypatent rightsidentified duringthedevelopment ofthe document willbe in the Introduction and/or on theIsolist ofpatent declarationsreceived.www.iso.org/patents Any trade name used in this document is information given for the convenience of users and does not constituteanendorsement. Thecommitteeresponsibleforthis documentisISo/TC61,Plastics, SubcommitteeSC6,Ageing,chemical andenvironmental resistance. This third edition cancels and replaces the second edition (Is0 4892-4:2004), of which it constitutes a minorrevision.ItalsoincorporatesTechnicalCorrigendumIs04892-4:2004/Corr.1:2005. Iso 4892 consists of the following parts, under the general title Plastics-Methods of exposure to laboratory lightsources: Part1:Generalguidance Part2:Xenon-arclamps Part3:FluorescentUVlamps Part4:Open-flamecarbon-arclamps INTERNATIONAL STANDARD IS0 4892-4:2013(E) Plastics Methods of exposure to laboratory light sources Part 4: Open-flame carbon-arc lamps 1 Scope Thispart of Iso4892specifiesmethodsforexposing specimenstoopen-flamecarbon-arclamps inthe presence of moisture to reproduce the weathering effects that occur when materials are exposed in actual end-use environments in daylight or daylightfiltered throughwindowglass. The specimens are exposed to filtered