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Proceedings Paper

Performance tests of two Robertson-Berger type UV meters Solar Light Model 500 and 501
Author(s): Kirsti Leszczynski; Kari Jokela; Reijo Visuri; Laura Huurto; Janne Simola; Tapani Koskela; Petteri Taalas; Antti Aarva
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Paper Abstract

Solar calibrations and laboratory tests were performed for erythemally weighted Robertson- Berger type UV radiometers. The test instruments included four Solar Light Model 500 and two Model 501 meters. The solar calibrations were performed at different elevation angles with relatively clear skies. The absolutely calibrated Optronic 742 spectroradiometer was used as a reference instrument and the measurement results were normalized to the temperature of 25 degree(s)C. The uncertainty of the spectroradiometric measurements is estimated to be +/- 8%. The absolute average calibration factors obtained varied from 1.05 to 1.16 for Model 500 meters and from 0.93 to 0.98 for two Model 501 meters. The spectral responsivity and cosine responses were found to be satisfactory for both meter types. To obtain better knowledge of the thermal properties of the Solar Light Model 500 meters a temperature sensor was installed at the underside of the green filter located just below the phosphor layer. The obtained temperature coefficient based on the green filter temperature measurements was 0.80%/ degree(s)C. The overall uncertainty of Solar Light Model 501 measurements is estimated to be +/- 11% and according to the phosphor temperature corrected SL 500 measurements +/- 14%. Without temperature correction the uncertainty of Model 500 measurements increases up to +/- 19%.

Paper Details

Date Published: 2 November 1993
PDF: 12 pages
Proc. SPIE 2049, Atmospheric Radiation, (2 November 1993); doi: 10.1117/12.163508
Show Author Affiliations
Kirsti Leszczynski, Finnish Ctr. for Radiation and Nuclear Safety (Finland)
Kari Jokela, Finnish Ctr. for Radiation and Nuclear Safety (Finland)
Reijo Visuri, Finnish Ctr. for Radiation and Nuclear Safety (Finland)
Laura Huurto, Finnish Ctr. for Radiation and Nuclear Safety (Finland)
Janne Simola, Finnish Ctr. for Radiation and Nuclear Safety (Finland)
Tapani Koskela, Finnish Meteorological Institute (Finland)
Petteri Taalas, Finnish Meteorological Institute (Finland)
Antti Aarva, Finnish Meteorological Institute (Finland)


Published in SPIE Proceedings Vol. 2049:
Atmospheric Radiation
Knut H. Stamnes, Editor(s)

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