Radiometric Traceability for Pyranometer Calibration Based on High Flux LEDs and Reference Detector

Indian Journal of Pure & Applied Physics

article

Abdallah M Karmalawi¹ 

[1] Division of Photometry and Radiometry, National Institute of Standards

关键词: Pyranometer;    Radiometer;    WRR;    Radiometric traceability;    Article;   

DOI  :  10.56042/ijpap.v61i4.68963

来源: National Institute of Science Communication and Information Resources

【 摘 要 】

This article aims to establish a new system for pyranometer calibration traceable to the radiometric chain. Different spectrum high flux LEDs have been used as tunable irradiance sources. The calibration procedure, uncertainty budget, and traceability chain of the solar irradiance measurements are presented. Additionally, the results were evaluated using a reference pyranometer, calibrated traceable to radiometric traceability and World Radiometric Reference (WRR). The uncertainty values are also estimated to be around 1.19 % (k = 2) for LEDs-based pyranometer-pyranometer calibration (WRR traceability), and about 0.68 % (k = 2) for reference standard radiometer based (Radiometric traceability). The deviation between the reference pyranometer and the pyranometer under test was about 0.8% using LED at 655nm for irradiance of 500 W/m2.The sensitivity results have been evaluated by reference standard pyranometer traceable to WRR using a xenon lamp as a solar source, with a deviation of about 1 %.

【 授权许可】

Unknown