Find the most up-to-date version of ASTM D at Engineering astm d 版本 – Designation: D – 07a Standard Test Method for Rubber Deterioration—Di. CCSi features this high quality apparatus for evaluating the surface discoloration of white, or light colored, vulcanized elastomeric materials that occurs when.
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ASTM D von A number in parentheses indicates the year of last reapproval.
uv test astm d1148
A superscript epsilon e indicates an editorial change since the last revision or reapproval. The values given in parentheses are for information only.
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. Summary of Test Method 3. The specimens shall include one or more control specimens of known discoloration characteristics. This change d11488 color of lightcolored rubber surfaces is objectionable to the consumer.
Current edition approved May 1, Originally approved in Last previous edition approved in as D — If without automatic calculations, a computer program should be available for this calculation. The specimen shall be rectangular in shape, 62 by 12 mm 2. If a specimen of this size cannot be prepared from a production part, a modi? They cannot be used interchangeably without supporting data that demonstrates equivalency of the procedures for the materials tested.
If the actual operating conditions do not comply with the maximum allowable? Unless it is known that irradiance uniformity meets this requirement, use one of the procedures described in Practice GSection 5. If the specimens do not completely? The apparatus shall be operated continuously. However, if the test needs to be interrupted to perform routine maintenance or inspection, it should be during a dry period.
Set the irradiance level to 0. Expose specimens to a continuous cycle of 8 h light at 60? C uninsulated black panel temperature followed by 4 h of condensation at 50? C uninsulated black panel temperature.
Rubber UVA UVB Aging Test Machine , Accelerated Weathering Chamber ASTM D
Consult the manufacturer of the apparatus for equivalent broad band irradiance levels at to nm and to nm. NOTE s1148 spray and immersion in water frequently produce different results. In the immersion technique, the test specimens are placed in a chamber that is periodically? The maximum temperature attained by a black colored specimen is determined with the black standard thermometer D1148 held under water on the same plane and distance from the surface as the test specimens.
Rubber UVA UVB Aging Test Machine , Accelerated Weathering Chamber ASTM D1148
The immersion system is made from corrosion resistant materials that do not contaminate the water. Calculate the difference between an unexposed specimen and the exposed specimen, as follows: Either expression is suitable for use in this test method, but one must not mix them together. A complete equation can be found in Practice D Consult the manufacturer of wstm apparatus for the equivalent insulated black panel temperature Black Standard Temperature BST.
Precision ast, Bias 9.
Astn will include any necessary calibrations. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
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