National Calibration Facility for Retroreflective Traffic Control Materials (2005)

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C-1 APPENDIX C SAMPLE CALIBRATION REPORT REPORT OF CALIBRATION Special Photometric Tests for Submitted Retroreflective Sheeting 37100S for a white prismatic retroreflective sample with S/N: NIST20001 Submitted by: Company ABC Attn.: John Doe 100 1st Avenue Hometown, MD 10000 (See your Purchase Order No. XYZ, dated December 32, 2000) 1. Calibration Item A white prismatic retroreflective sample manufactured by Company ABC was calibrated for coefficient of retroreflected luminance. The sample designation number scribed on the back of the sample is NIST20001. 2. Description of the Calibration The first paragraph describes the calibration and what NIST scale it is based. Also stated is when the NIST scale was last realized and what international definition it is based. The details of the NIST coefficient of retroreflected luminance unit are described in reference [1]. The second paragraph states briefly the procedure used to calibrate the item and any particular details. The room temperature, instrument ambient temperature and relative humidity are stated for when the calibration was performed.

REPORT OF CALIBRATION S/N: NIST20001 Calibration of coefficient of retroreflected luminance Company ABC Calibration Date: December 33, 2005 NIST Test No.: 844/222333-05 Page 2 of 3 C-2 3. Results of the Calibration The results of the calibration are shown in Table 1. The relative expanded uncertainty (with coverage factor k=2) is stated. The uncertainty budget is shown in Table 2. The NIST policy on uncertainty statements is described in reference [2]. Table 1. Results of Calibration Observation Entrance Entrance Rotation Coeff. of Item Angle Angle 1 Angle 2 Angle Retroreflected Designation [°] [°] [°] [°] Luminance [cd/lx/m2] NIST20001 0.200 -4.00 0.00 0.00 4.0854 4. General Information More specific details are added in this section. The Calibration Report shall not be reproduced except in full, without the written approval of NIST. Prepared by: C. Cameron Miller Optical Technology Division Physics Laboratory (301) 975-4713 Approved by: Yoshihiro Ohno For the Director, National Institute of Standards and Technology (301) 975-2321 References: [1] C. Miller, NIST Special Publication 250-XX “Retroreflection Calibration” (2005). [2] B. N. Taylor and C. E. Kuyatt, "Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results," NIST Technical Note 1297 (1993).

REPORT OF CALIBRATION S/N: NIST20001 Calibration of coefficient of retroreflected luminance Company ABC Calibration Date: December 33, 2005 NIST Test No.: 844/222333-05 Page 3 of 3 C-3 Table 2. Uncertainty budget for this calibration Uncertainty Component Type Rel. Standard Uncertainty (%) Various Items B 0.18 Various Items B 0.08 Various Items B 0.01 Various Items A 0.04 Various Items B 0.11 Various Items A 0.30 Relative combined standard uncertainty 0.XX Relative expanded uncertainty (k=2) 0.XX

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