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ASTM-E811:2009 Edition

ASTM-E811:2009 Edition

$40.63

E811-09 Standard Practice for Measuring Colorimetric Characteristics of Retroreflectors Under Nighttime Conditions

Published By Publication Date Number of Pages
ASTM 2009 8
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1.1 This practice describes the instrumental determination of retroreflected chromaticity coordinates of retroreflectors. It includes the techniques used in a photometric range to measure retroreflected (nighttime) chromaticity with either a telecolorimeter or telespectroradiometer.

1.2 This practice covers the general measurement procedures. Additional requirements for specific tests and specifications are described in Section 7.

1.3 The description of the geometry used in the nighttime colorimetry of retroreflectors is described in Practice E808 and the methods for calculation of chromaticity are contained in Practice E308 .

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. 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.

PDF Catalog

PDF Pages PDF Title
1 Scope
Referenced Documents
Terminology
2 Summary of Practice
Significance and Use
3 Use of the CIE Chromaticity Diagram for the Specification of Color
Requirements to be Stated in Specifications
4 Apparatus
Test Specimen and Sample
Calibration and Standardization
5 Procedure
FIG. 1
6 Precision and Bias
FIG. 2
7 Keywords
TABLE 1
TABLE 2
TABLE 3
TABLE 4

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