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紫外光老化試驗箱ISO4892-2標準以“塑料—暴露于實驗室光源的方法”為總標題，由以下部分組成：第1部分：通則、第2部分：氙弧燈、第3部分：熒光紫外燈、第4部分：開放式碳弧燈，紫外光老化試驗箱ISO 4892 的本部分的附錄A僅作參考之用。中華人民共和國國家標準制定的GB/T 16422.2-1999/ISO4892-2:1994代替GB/T9344--1988標準規(guī)定了塑料實驗室氙弧燈光源的暴露試驗方法。通則在GB/T 16422.1給出.標準所包含的條文，通過在本標準中引用而構成為本標準的條文。本標準出版時，所示版本均為有效。所有標準都會被修訂，使用本標準的各方面探討使用下列標準版本的可能性。
GB/T15596—1995 塑料暴露于玻璃下日光或自然氣候或人工光后顏色和性能變化的測定(eqvISO4582:1980)GB/T16422.1—1996 塑料實驗室光源暴露試驗方法 第1部分：通則(eqvISO4892.1-1994)
ISO4892-2:2013 specifies methods for exposing specimens to xenon-arc light in thepresence of moisture to reproduce the weathering effects (temperature, humidityand/or wetting) that occur when materials are exposed in actual end-useenvironments to daylight or to daylight filtered through window glass.
1 Scope
This part of ISO 4892specifies methods for exposing specimens to xenon-arc light in the presence of moisture to reproduce theweathering effects that occur when materials are exposed in actual end-use environments to daylight orto daylight filtered through window glass.The specimens are exposedto filtered xenon-arc light under controlled conditions (temperature, humidity and/or wetting). Varioustypes of xenon-arc light source and various filter combinations may be used tomeet different requirements.Specimen preparation andevaluation of the results are covered in other International Standards forspecific materials.
General guidance is givenin ISO 4892-1.NOTE Xenon-arc exposures ofpaints and varnishes are described in ISO 11341.
2 Normative references
The following referenceddocuments are indispensable for the application of this document. For dated references, only theedition cited applies. For undated references, the latest edition of thereferenced document (including anyamendments) applies.
ISO 4582, 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, fittedwith suitable filters and properly maintained, is used to simulate the spectralpower distribution of daylight inthe ultraviolet (UV) and visible regions of the spectrum.
3.2 Specimens are exposedto various levels of light, heat, relative humidity and water (see 3.4) under controlled environmental conditions.
3.3 The exposure conditionsmay be varied by selection of
a) the light filter(s);
b) the irradiance level;
如需更多ISO 4892-2標準的信息請訪問http://www.laohuashiyanxiang.com/bz144.html
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