Quality assurance of reference standards from nine European solar-ultraviolet monitoring laboratories.
A program for quality assurance of reference standards has been initiated among nine solar-UV monitoring laboratories. By means of a traveling lamp package that comprises several 1000-W ANSI code DXW-type quartz-halogen lamps, a 0.1-ohm shunt, and a 6-1/2 digit voltmeter, the irradiance scales used by the nine laboratories were compared with one another; a relative uncertainty of 1.2% was found. The comparison of 15 reference standards yielded differences of as much as 9%; the average difference was less than 3%.
Gröbner
Julian
J
European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra, Italy. julian.groebner@jrc.it
Rembges
Diana
D
Bais
Alkiviadis F
AF
Blumthaler
Mario
M
Cabot
Thierry
T
Josefsson
Weine
W
Koskela
Tapani
T
Thorseth
Trond M
TM
Webb
Ann R
AR
Wester
Ulf
U