State Primary Standard for the Unit Volume Activity of Alpha-Emitting Aerosols
Reproduction and maintenance of the units of volume activity of alpha-radiating aerosols.
Dissemination of the units of volume activity of alpha-radiating aerosols to the working standards and working instruments of the increased accuracy by means of the method of direct measurements and with a help of density dilution of aerosols from 10 Bq/m3 to 1·1010 Bq/m3 in accordance with DSTU 7121:2009 “Metrology. National verification scheme for measuring instruments of volume activity of alpha-radiating aerosols”.
Metrological characteristics | ||
Range | from 10 Bq/m3 to 1⋅1010 Bq/m3 | |
Uncertainty by type A (uA) | 3⋅10-2 | |
Uncertainty by type B (uB) | 1,65⋅10-2 | |
Total standard uncertainty (uC) | 3,4⋅10-2 | |
Extended uncertainty (U) | 6,8⋅10-2 | |