State Primary Standard of Unit Volume Activity of Radon-222
Reproduction and maintenance of the unit of volume activity of radon-222 in air.
Dissemination of the unit of volume activity of radon-222 in air to the working standards and also (in particular cases) to the working instruments of the measuring technology by means of the method of direct measurements in accordance with DSTU 3536-97 “Metrology. National verification scheme for measuring instruments of volume activity of radon-222”.
Metrological characteristics | ||
Range | from 30 Bq/m3 to 3×104 Bq/m3 | |
Uncertainty by type A (uA) | 2⋅10-2 | |
Uncertainty by type B (uB) | 0,79⋅10-2 | |
Total standard uncertainty (uC) | 2,15⋅10-2 | |
Extended uncertainty (U) | 4,3⋅10-2 | |