【摘要】 本文介绍用一组真空可变间隙电容器,在60Hz～10kHz频率范围内,绝对测定参考电容器损耗因数的结果。在测量过程中采用了完全替代法及微差法,以消除测量装置引入的误差;并用微处理机对测量数据用最小二乘法进行处理,以消除某些由于人的因素产生的误差。测量结果用环形交叉电容器进行了核对,在1kHz时,测定10、100pF电容器损耗因数的绝对不确定度（2σ）分别为1.5×10^-7和1×10^-7。更多还原

【Abstract】 This paper describes the results of an absolute measurement of dissipation factor of standard capacitors within the frequency range from 60Hz to 10kHz, in terms of a group of parallel-plate guard-ring capacitors whose electrode separation can be adjusted while maintaining a vacuum condition. Successive bridge measurements are made with the substitution and the differential methods, so that the systematic error of the measuring equipment can be eliminated. The measured values are calculated with the least square method by a microcomputer, to eliminate the error of observation. The values obtained for absolute dissipation of standard capacitor BR-27 (1pF) agree with the values measured in terms of a toroidal cross-capacitor within 0.1ppm. The determinated values of dissipation factor of the two capacitors 10pF and 100pF have an estimated uncertainty (2σ) of 0.15ppm and 0.1ppm respectively.更多还原