Standard Practice for perating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials

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标准简介

Designation: G155-13 Standard Practice for perating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials11. Scope1.1 This practice covers the basic principles and operatingprocedures for using xenon arc light and water apparatusintended to reproduce the weathering effects that occur whenmaterials are exposed to sunlight (either direct or throughwindow glass) and moisture as rain or dew in actual use.Thispractice is limited to the procedures for obtaining, mcasuring.and controlling conclitions of exposure.A number of exposureprocedures are listed in an appendix; however,this practice6. Apparatus6.l Laboratovy Lighs Source—The light source shall be oneor more quartz jacketed xenon arc lamps which emit radiationfrom below 270 nm in the ultrawiolet through the visiblespectrum and into the infrared. In order for xenon arcs tosimulate terrestrial daylight.filters must be used to removeshort wavelength Uv radiation. Filters to reduce irradiance atwavelengths shorter than 310 nm must be used lo simulatedaylight filtered through window glass.In addition.filters toremove infrared radiation may bc used to prevent unrealisticheating of test specimens that can cause thermal degradat

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