Final Report on COOMET Supplementary Comparison COOMET.PR-S5 (COOMET 429/CU/08)

Abstract

Main text This report gives the results of the COOMET Supplementary Comparison COOMET.PR-S5 of Regular Spectral Transmittance 250 nm to 635 nm (COOMET Project 429/CU/08). The NIM participating in the comparison are: National Metrology Research Institute of Cuba (INIMET), Brazilian National Institute of Metrology, Standardization and Industrial Quality (INMETRO), State Institute of Metrology of Belarus (BelGIM), SMU Slovak Institute of Metrology (Slovakia), and the National Scientific Center "Ukrainian Institute of Metrology" (NSC IM. Ukraine). Ukraine's designated institute in this area of Photometry and Radiometry field is NSC IM, thus, the standard measurement data of the Ukrmetrteststandard (All-Ukrainian state research and production center for standardization, metrology, certification and protection of consumer rights) are not included in the main part of this report, and were not used to evaluate the comparison reference values (RV) and RV differences. They are only presented in the Annex. INMETRO of Brazil participates with two spectrophotometers. INIMET was the pilot for the comparison. The comparison object was a set of four neutral glass filters with different values of regular spectral transmittance. The comparison is performed following the requirements of program participation sequential measurements. The pilot measured twice, at the beginning and at the end. To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database https://www.bipm.org/kcdb/. The final report has been peer-reviewed and approved for publication by the CCPR, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).