Engaged Expert Terry Candlish discusses ASTM G and G tests which are used to evaluate sunlight and moisture exposure. ASTM. ASTM G & G UV Testing. The UV testing was performed on ecomère by Touchstone Labs in Tridelphia, WV, again at the request of Southern . ASTM G – Designation: G – 06 Standard Practice for Operating Fluorescent Light Appara.
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ASTM G and G Explained | Element
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in g154-6 standard. B The data in Table 1 are based on the rectangular integration of 65 spectral power distributions for?
However, there is no simple equation for calculating exposure.
In round-robin studies conducted by Subcommittee G This is because the UVA has a special power distribution in the short wave UV region that is similar to sunlight that has already been? The ASTM G and G tests empower manufacturers to design products that can withstand exposure to sunlight and moisture.
However, each of these variables brings uniquely inaccurate results. Therefore, no reference shall be g54-06 to f154-06 from the use of this practice unless accompanied by a report detailing the specific operating conditions in conformance with Section Following are some representative exposure conditions. We can work with you to ascertain the most cost-effective, accurate testing approach for your material.
As shown in Fig.
The shorter, more damaging UVB wavelengths are the most greatly affected. The spectral power distribution data is for lamps within the aging recommendations of the device manufacturer.
In xenon arc testing, different optical filters may be applied to shift testing conditions for daylight, window glass, or extended UV spectrum exposure. The minimum and maximum data are at least the three sigma limits from the mean for all measurements.
Appendix X2 shows some representative exposure conditions. Element provides both types of tests at our ISO accredited testing laboratories. This may lead to anomalous results. 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.
See Appendix X3 for more information comparing the solar radiation data asgm in this standard with that for CIE 85 Table 4. These lamps emit different amounts of total energy, but both g14-06 at nm and produce the same UV wavelengths in the same relative proportions.
ASTM G154 and G155 Explained
These numbers represent the characteristic nominal wavelength in nm of peak emission for each of these lamp types. Aging of glass can result in a signi? Note—A footnote was added to Table X2. In contrast, UV-A bulbs have a propensity for accelerating color fading and yellowing. NOTE 3—Do not mix different types of lamps. The apparatus described in Practice G 53 is covered by this practice. The previous set points were 0. F For the benchmark solar spectrum, the UV irradiance to nm is 9. This standard does not purport to address all of the safety concerns, if any, associated with its use.
The pH of the water used should be reported. The un-insulated thermometers may be made of either steel or aluminum. Consequently, the use of a radiometer to monitor and control the radiant energy is recommended.
Remember, these accelerated weatherization tests cannot exactly reproduce outdoor conditions, as they cannot account for atm, seasonal variations, local geographical features, and other variables.
Alternatively, the exposure may simulate the effects of sunlight through window glass.