一、各国电阻基准概况要提高电气测量的精度,首先要提高基准的稳定性,改进比较技术和标定技术。各国的计量研究机构都努力改进主基准的精度,逐年筛选,以求精益求精,同时为了各国计量单位的一致,每隔数年把基准组送到国际计量局(BIPM)进行比对。 First, the national resistance benchmark Overview To improve the accuracy of electrical measurements, we must first improve the stability of the benchmark to improve the comparison techniques and calibration techniques. Metrology institutes all over the world strive to improve the accuracy of the master benchmark and screen them year by year to keep improving. At the same time, the benchmark groups are sent to the International Bureau of Weights and Measures (BIPM) for comparison every few years for consistency of units of measure.