1、Designation:G15213Standard Practice forOperating Open Flame Carbon Arc Light Apparatus forExposure of Nonmetallic Materials1This standard is issued under the fixed designation G152;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This practice covers the basic principles and operatingprocedures for using open flame carbon-arc light and watera
3、pparatus intended to reproduce the weathering effects thatoccur when materials are exposed to sunlight(either direct orthrough window glass)and moisture as rain or dew in actualuse.This practice is limited to the procedures for obtaining,measuring,and controlling conditions of exposure.A numberof ex
4、posure procedures are listed in an appendix;however,thispractice does not specify the exposure conditions best suitedfor the material to be tested.NOTE1Practice G151 describes performance criteria for all exposuredevices that use laboratory light sources.This practice replaces PracticeG23,which desc
5、ribes very specific designs for devices used for carbon-arcexposures.The apparatus described in Practice G23 is covered by thispractice.1.2 Test specimens are exposed to filtered open flamecarbon arc light under controlled environmental conditions.Different filters are described.1.3 Specimen prepara
6、tion and evaluation of the results arecovered in methods or specifications for specific materials.General guidance is given in Practice G151 and ISO 4892-1.More specific information about methods for determining thechange in properties after exposure and reporting these resultsis described in Practi
7、ce D5870.1.4 The values stated in SI units are to be regarded as thestandard.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine
8、 the applica-bility of regulatory limitations prior to use.1.5.1 Should any ozone be generated from the operation ofthe light source,it shall be carried away from the testspecimens and operating personnel by an exhaust system.1.6 This practice is technically similar to ISO 4892-4.2.Referenced Docume
9、nts2.1 ASTM Standards:2D3980 Practice for Interlaboratory Testing of Paint andRelated Materials(Withdrawn 1998)3D5870 Practice for Calculating Property Retention Index ofPlasticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodG23 Practice for Operating
10、 Light-Exposure Apparatus(Carbon-Arc Type)With and Without Water for Exposureof Nonmetallic Materials(Withdrawn 2000)3G113 Terminology Relating to Natural and Artificial Weath-ering Tests of Nonmetallic MaterialsG151 Practice for Exposing Nonmetallic Materials inAccel-erated Test Devices that Use La
11、boratory Light Sources2.2 CIE Standard:CIE-Publ.No.85:Recommendations for the IntegratedIrradiance and the Spectral Distribution of SimulatedSolar Radiation for Testing Purposes42.3 ISO Standards:ISO 4892-1 PlasticsMethods of Exposure to LaboratoryLight Sources,Part 1,General Guidance4ISO 4892-4 Pla
12、sticsMethods of Exposure to LaboratoryLight Sources,Part 4,Open-Flame Carbon Arc Lamp43.Terminology3.1 DefinitionsThe definitions given in Terminology G113are applicable to this practice.3.1.1 As used in this practice,the term sunlight is identicalto the terms daylight and solar irradiance,global as
13、 they aredefined in Terminology G113.1This practice is under the jurisdiction ofASTM Committee G03 on Weatheringand Durability and is the direct responsibility of Subcommittee G03.03 onSimulatedand Controlled Exposure Tests.Current edition approved July 1,2013.Published July 2013.Originally approved
14、in 1997.Last previous edition approved in 2006 as G152 06.DOI:10.1520/G0152-13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe
15、ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM In
16、ternational,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Summary of Practice4.1 Specimens are exposed to repetitive cycles of light andmoisture under controlled environmental conditions.4.1.1 Moisture usually is produced by spraying the testspecimen with demineralized/deionized water or by condensa-tion of water vapor onto the specimen.4.2 The exposure condition may be varied by selection of:4.2.1 Light source filter,4.2.2 The type of moisture exposure,4.2.3