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ASTM E2540 PDF
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Standard Test Method for Measurement of Retroreflective Signs Using a Portable Retroreflectometer at a 0.5 Degree Observation Angle
| Published by | Publication Date | Number of Pages |
| ASTM | 02/01/2022 | 7 |
ASTM E2540 – Standard Test Method for Measurement of Retroreflective Signs Using a Portable Retroreflectometerat a 0.5 Degree Observation Angle
1.1”This test method covers measurement of the retroreflective properties of sign materials such as traffic signs and symbols (vertical surfaces) using a portable retroreflectometer that can be used in the field. The portable retroreflectometer is a hand-held instrument with a defined standard geometry that can be placed in contact with sign material to measure the retroreflection in a standard geometry. The measurements can be compared to minimum requirements to determine the need for replacement. Entrance and observation angles specified in this test method are those used currently in the United States and may differ from the angles used elsewhere in the world.
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