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.
|Country:||Bosnia & Herzegovina|
|Published (Last):||25 May 2016|
|PDF File Size:||5.74 Mb|
|ePub File Size:||17.48 Mb|
|Price:||Free* [*Free Regsitration Required]|
Active view current version of standard. This standard does not purport to address all of the safety concerns, if any, associated with its use.
ASTM G and G Explained | Element
Other integration techniques can be used to evaluate spectral power distribution data, but may give different results. In ASTM G testing, UVA bulbs create the best correlation with outdoor exposure, as they have the closest wavelengths to damaging natural light from to nm. Ordinary glass is essentially transparent to light above about nm. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
Test results can be expected to differ between exposures using devices with?
ASTM G154 and G155 Explained
These numbers represent the characteristic nominal wavelength in nm of peak emission for each of these lamp types. Prior to exposing the specimens, quantify the appropriate properties in accordance with recognized ASTM or international standards.
Typically, these exposures would include moisture in the form of condensing humidity. In these special cases, the use of UVA lamps is recommended since the glass or plastic will? The actual peak emissions are at and nm, respectively. NOTE 1—Practice G describes performance criteria for all exposure aetm that use laboratory light sources.
This practice replaces Practice G 53, which describes very specific designs atm devices used for fluorescent UV exposures. Cycle 6 has been used for high irradiance exposures of coatings and plastics.
Further, because there is little longer wavelength energy, the glass-? The apparatus described in Practice G 53 is covered by this practice.
Last previous edition approved in as G — As a result of?
Hemispherical on 37 Tilted Surface. 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. The default lamp for this and other cycles is the UVB lamps with peak emission at nm, but? Include a control, to act as a weatherization standard. Element has been helping g145-06 make Certain for over years.
g1540-6 Cycle 5 has been used for roo? Different types of fluorescent UV lamp sources are described. These lamps emit different amounts of total energy, but both peak at nm and produce the same UV wavelengths in the same relative proportions.
This practice is limited to the procedures for obtaining, measuring, and controlling conditions of exposure. Brass, steel, or copper shall not be used in the vicinity of the test specimens. Frequently, the irradiance is not controlled in this type of exposure device.
Hemispherical on 37 Tilted Surface. In xenon arc testing, different optical filters may be applied to shift testing conditions for daylight, window glass, or extended UV spectrum exposure. Current edition approved June 5, Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The spray system shall be made from corrosion resistant materials that do not contaminate the water used.
Element provides both types of tests at our ISO accredited testing laboratories. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. For instance, constant exposure with no temperature cycling fails to recreate the expansion and contraction stress that materials face in outdoor locations.