Standard Practice for Measuring Colorimetric Characteristics of Retroreflectors Under Nighttime Conditions
|Publication Date:||1 January 1995|
|ICS Code (Road equipment and installations):||93.080.30|
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 telespectroradiomete
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 E 808 and the methods for calculation of chromaticity are contained in Test Method E 308.
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.