ASTM-E809 2008
$44.96
E809-08 Standard Practice for Measuring Photometric Characteristics of Retroreflectors
| Published By | Publication Date | Number of Pages |
| ASTM | 2008 | 11 |
1.1 This practice describes the general procedures for instrumental measurement of the photometric characteristics of retroreflective materials and retroreflective devices.
1.2 This practice is a comprehensive guide to the photometry of retroreflectors but does not include geometric terms that are described in Practice E 808 .
1.3 This practice describes the parameters that are required when stating photometric measurements in specific tests and specifications for retroreflectors.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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 Uses and Applications FIG. 1 |
| 3 | Requirements When Measuring Retroreflectors Apparatus FIG. 2 |
| 4 | Selection of Photometric Range Parameters Test Specimen Calibration TABLE 1 |
| 5 | Test Procedure |
| 6 | Calculation |
| 7 | Report Precision and Bias Keywords A1. METHOD FOR VERIFYING PHOTOPIC RESPONSIVITY A1.1 Scope A1.2 Significance and Use A1.3 Spectroradiometric Procedure |
| 8 | A2. METHOD FOR DETERMINING PHOTORECEPTOR LINEARITY A2.1 Scope A2.2 Apparatus A2.3 Procedure FIG. A2.1 FIG. A2.2 |
| 9 | A2.4 Calculation A2.5 Measuring Linearity by Means of the Light Addition Method FIG. A2.3 |
| 10 | A3. METHOD FOR DETERMINING CORRELATED COLOR TEMPERATURE A3.1 Scope A3.2 Apparatus A3.3 Procedure FIG. A3.1 FIG. A3.2 |
| 11 | REFERENCES |
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