Direct traceability of the portable QASUME irradiance scale to the primary irradiance standard of the PTB

摘要: The portable Quality Assurance of Spectral UV Measurements in Europe (QASUME) irradiance scale has been directly compared to the primary standard (blackbody BB3200pg) Physikalisch-Technische Bundesanstalt (PTB) using travelling spectroradiometer QASUME. average blackbody spectral based on three different temperatures (2940?K, 2997?K and 3059?K) was 0.7% greater than QASUME low-power lamps. This is fully consistent with expanded uncertainty (k = 2) 4% ultraviolet (UV) wavelength range 2.6% above 400?nm scale. If these measurements are used establish scale, then its substantially reduced 2.5% 2.0% 400?nm.