State Primary Standard of Units of Spectral Density of Energy Brightness, Spectral Density of Radiation Force and Spectral Density of Energy Illumination; Radiation Power and Energy Illumination
Reproduction and maintenance of the units of spectral density of radiance, spectral density of radiant intensity and spectral density of irradiance; of the radiant power and irradiance.
Transferring of the sizes of the units of spectral density of the radiance, spectral density of radiant intensity and spectral density of irradiance; of the radiant power and irradiance to the working standard and working measurement instruments by means of the methods of indirect measurements and comparison with the help of the comparator in accordance with DSTU “Metrology. National verification scheme for measuring instruments of spectral density of the radiance in the wavelength range from 0,2 μm to 25 μm; spectral density of radiant intensity and spectral density of irradiance in the wavelength range from 0,2 μm to 2,5 μm; radiant power, radiant intensity and irradiance in the spectral intervals with the width from 1·10-4 μm to 2·10-2 μm in the wavelength range from 0,2 μm to 2,5 μm”.
Metrological characteristics | |||
Range | from 4⋅104 W/cp⋅m3 до 3⋅1011 W/cp⋅m3 from 3 W/cp⋅m to 3⋅107 W/cp⋅m from 10 W/m3 to 1⋅108 W/m3 | from 1⋅10-7 W to 1⋅10-3 W from 5⋅10-4 W/m2 to 5 W/m2 | |
Uncertainty by type A (uA) | 0,05 % | 0,3 % | |
Uncertainty by type B (uB) | 0,62 % | 0,2 % | |
Total standard uncertainty (uC) | 0,8 % | 0,36 % | |
Extended uncertainty (U) | 1,6 % | 0,72 % | |