State Primary Standard of Hardness Units on Brinell and Vickers Scales
Reproduction of the hardness units on the Brinell and Vickers scales and their transfer to the working standards (hardness measures) of the 1st class by means of the method of indirect measurements in accordance with DSTU 3870-99 “Metrology. National verification scheme for measuring instruments of hardness on the Brinell and Vickers scales”.
Metrological characteristics | ||||
Range | from 8 НВ to 450 НВ from 95 НВW to 650 НВW | from 8 НV to 2000 НV | ||
from 9,8 Н to 19,6 Н | from 49,0 Н to 980,7 Н | |||
Uncertainty by type A (uA) | 1⋅10-3 | 2⋅10-3 | 1⋅10-3 | |
Uncertainty by type B (uB) | 1,25⋅10-3 | 2,5⋅10-3 | 1,25⋅10-3 | |
Total standard uncertainty (uC) | 1,6⋅10-3 | 3,2⋅10-3 | 1,6⋅10-3 | |
Extended uncertainty (U) | 3,2⋅10-3 | 6,4⋅10-3 | 3,2⋅10-3 | |