Uncertainty Evaluation on Measurement Results of Electrical Conductivity of H96 Brass Bar

The uncertainty sources of electrical conductivity (EC) of the metal conductor in measurement course were analyzed, and the uncertainty on measurement results of electrical conductivity of H96 brass bar was evaluated. The results show that the uncertainty sources of electrical conductivity of the metal conductor in measurement course mainly included ambient temperature measurement, sample gauge length, diameter measurement, resistance measurement, data rounding and so on; the uncertainty report of electrical conductivity of H96 brass bar measurement results was EC=54%IACS, U=2%IACS, k=2.