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ASTM G Standard Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials. ASTM G Standard Practice for Operating Xenon Arc. Light Apparatus for UV Exposure of Nonmetallic Materials. View on Information Provider website. Engaged Expert Terry Candlish discusses ASTM G and G tests which are used to evaluate sunlight and moisture exposure. ASTM.

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ASTM Ga(General)_百度文库

The ASTM G and G tests empower manufacturers to design products that can withstand exposure to sunlight and moisture. Different types of xenon arc light sources and different?

When required, provision shall be made for the spraying of water on the test specimen, for the formation of condensate on the exposed face of the specimen or for the immersion of the test specimen in water. Condensation may be produced on the face of the specimens by spraying the rear side of the specimens to cool them below the dew point. See Practice D for detailed guidance. Weatherometers used in the G and G tests approximate performance via intense exposure to the damaging elements in sunlight.

F For the benchmark solar spectrum, the UV irradiance to nm is 9. Consult the applicable test method or material speci? Thermometers shall conform to the g15 found in Practice G The glass transmission is the average for a series of single strength window glasses tested as part of a research study for ASTM Subcommittee G3. B Xstm data in Table 1 are based on the rectangular integration of spectral power distributions for water and air cooled xenon-arcs with daylight?

Therefore, these bulbs are useful for testing interior applications. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Users of this asmt are expressly advised that determination g1155 the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. When reproducibility in results from an exposure test conducted according to this practice have not been established through round-robin testing, performance requirements for materials shall be speci?


D The benchmark solar radiation data is de? Therefore, no reference shall sstm made to results from the use of this practice unless accompanied by a report detailing the specific operating conditions in conformance with the Report Section. Annex A1 states how to determine relative spectral irradiance.

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G26— Method C — continuous exposure to light with no water spray Uses window glass? The total irradiance in each wavelength bandpass is then summed and divided by the speci? Different type and different size asrm operating in different wattage ranges may be utilized in different sizes and types of apparatus.

Use of this equation requires that each spectral interval must be the same for example, 2 nm throughout the spectral region used. The repositioning schedule shall be agreed upon by all interested parties.

When these holders are used, they may be? After inspection, the test asmt shall be returned to the test chamber with its test surface in the same orientation as previously tested. Moisture takes its own toll on surfaces, and the combination of sunlight and moisture can amplify damage, costing millions of dollars of depreciation each year. Current astmm approved Oct.

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.

ASTM G154 and G155 Explained

As such, the ASTM G and G tests produce comparative, not absolute data, but these comparative evaluations can still prove extremely valuable to designers. If required for example, destructive testing asfm, use unexposed? See Appendix X4 for more information comparing the solar radiation data used in the standard with that for CIE 85 Table 4. Recreate specialized conditions zstm filters. Control samples and multiple material samples produce the best comparative data.

B The data in Table 2 are based on the rectangular integration of 36 spectral power distributions for water cooled and air cooled xenon-arcs with window glass?


Your comments will receive careful consideration at a meeting of the responsible technical committee, which you asm attend. These conditions are provided for reference only see Table X3. Cycles 5 and 6 have been commonly used for indoor textile materials. Prior to exposing the specimens, quantify the appropriate properties in accordance with recognized international standards. The percentages of UV and visible irradiances on samples exposed in xenon arc devices with window glass?

ASTM G and G Explained | Element

Because xenon arc light is most similar asym natural sunlight, we generally use the ASTM G test for outdoor weatherization testing. Our team understands that florescent light has lower correlation to sunlight than xenon arc light; therefore, we generally recommend using the ASTM G fluorescent test to test for interior exposure i.

Link to Active This link will always route to the current Active version of the standard. Test results can be expected to differ between exposures using xenon arc devices in which the spectral power distributions differ by as much as that allowed by the tolerances. This allows for accurate comparison.

Brass, steel, or copper shall not be used in the vicinity of the test specimens. For determining conformance to the relative spectral irradiance requirements for a xenon-arc with extended UV?

Any backing used may affect test results and shall be agreed upon in advance between the interested parties. In the ASTM G test, xenon arc lamps simulate full-spectrum sunlight within a controlled test chamber. In round-robin studies conducted by Subcommittee G Exposures are not intended to simulate the deterioration caused by localized weather phenomena, such as atmospheric pollution, biological attack, and saltwater exposure.

See Appendix X4 for more information comparing the solar radiation data used in this standard with that for CIE 85 Table 4.