5.1 The use of this apparatus is intended to induce property changes associated with the end use conditions, including the effects of the UV portion of sunlight, moisture, and heat. These exposures may include a means to introduce moisture to the test specimen. Exposures are not intended to simulate the deterioration caused by localized weather phenomena, such as atmospheric pollution, biological attack, and saltwater exposure. Alternatively, the exposure may simulate the effects of sunlight through window glass. Typically, these exposures would include moisture in the form of condensing humidity.
5.2 Variation in results may be expected when operating conditions are varied within the accepted limits of this practice. Therefore, no reference shall be made to results from the use of this practice unless accompanied by a report detailing the specific operating conditions in conformance with the Section 10.
5.2.1 It is recommended that a similar material of known performance (a control) be exposed simultaneously with the test specimen to provide a standard for comparative purposes. It is recommended that at least three replicates of each material evaluated be exposed in each test to allow for statistical evaluation of results.
1.1 This practice covers the basic principles and operating procedures for using fluorescent UV light, and water apparatus intended to reproduce the weathering effects that occur when materials are exposed to sunlight (either direct or through window glass) and moisture as rain or dew in actual usage. This practice is limited to the procedures for obtaining, measuring, and controlling conditions of exposure. A number of exposure procedures are listed in an appendix; however, this practice does not specify the exposure conditions best suited for the material to be tested.
 for Exposure of Nonmetallic Materials </li><li><a href='/1330954017.html' target=_blank>ISO 4582</a> Plastics — Determination of changes in colour and variations in properties after exposure to glass-filtered solar radiation, natural weathering or laboratory radiation sources</li><li><a href='/8211368.html' target=_blank>ISO 4892-1</a> Plastics - Methods of exposure to laboratory light sources - Part 1: General guidance</li><li><a href='/8164374.html' target=_blank>ISO 4892-3</a> Plastics - Methods of exposure to laboratory light sources - Part 3: Fluorescent UV lamps</li> </ul>
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<h2 class='h4'>ASTM G154-12a history</h2><ul><li><span class='label label-default'>2023</span> <a href='/1037916809.html' target=_blank>ASTM G154-23</a> Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Materials</li><li><span class='label label-default'>2016</span> <a href='/7733638.html' target=_blank>ASTM G154-16</a> Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials</li><li><span class='label label-default'>2012</span> <a href='/6622910.html' target=_blank>ASTM G154-12a</a> Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials</li><li><span class='label label-default'>2012</span> <a href='/6590386.html' target=_blank>ASTM G154-12</a> Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials</li><li><span class='label label-default'>2006</span> <a href='/5706892.html' target=_blank>ASTM G154-06</a> Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials</li><li><span class='label label-default'>2005</span> <a href='/1130227725.html' target=_blank>ASTM G154-05</a> Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials</li><li><span class='label label-default'>2004</span> <a href='/5722909.html' target=_blank>ASTM G154-04</a> Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials</li><li><span class='label label-default'>2000</span> <a href='/5714390.html' target=_blank>ASTM G154-00ae1</a> Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials</li><li><span class='label label-default'>2000</span> <a href='/5714391.html' target=_blank>ASTM G154-00a</a> Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials</li><li><span class='label label-default'>2000</span> <a href='/5714392.html' target=_blank>ASTM G154-00</a> Standard Practice for Operating Fluorescent Light Apparatus for UV Exposure of Nonmetallic Materials</li></ul> <!--History -->
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