关于表计输入阻抗在直流高压分压器检定校准中的影响分析

刘方明; 肖凯; 王海燕; 刘浩; 匡义

doi:10.3969/j.issn.1000-1158.2023.05.15

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计量学报 ›› 2023, Vol. 44 ›› Issue (5) : 771-776. DOI: 10.3969/j.issn.1000-1158.2023.05.15

电磁学计量

关于表计输入阻抗在直流高压分压器检定校准中的影响分析

刘方明^1,2,肖凯^1,2,王海燕^1,2,刘浩^1,2,匡义^1,2

作者信息 +

The Influence of Digital Multimeter Input Impedance in DC High Voltage Dividers Measurement

LIU Fang-ming^1,2,XIAO Kai^1,2,WANG Hai-yan^1,2,LIU Hao^1,2,KUANG Yi^1,2

Author information +

文章历史 +

摘要

目前直流高压分压器通常采用电压比法或差值法进行检定校准,认为低压侧表计输入阻抗会对测量结果有一定的影响,但缺乏定量分析以及理论依据。开展了表计输入阻抗对分压比测量结果影响的试验,通过建立数学模型给出表计输入阻抗对测量结果偏差的计算公式,并提出一种通过影响因子对测量结果进行修正的方法。试验表明通过影响因子修正后的结果与真实测量结果偏差不超过0.01%。

Abstract

Voltage division and subtraction of low-voltage side was used in the DC high voltage dividers measurement.It was generelly assumed that digital multimeter imput impedance has certain effects on the measurement,so far the assuming was lack of theory basis and experimental datas.To prove the assuming, an experiment is carried out and sereval valuable data is presented.Further more,an impact factor of the measurment effect is given out by building the methemetical model, and a revised method is proposed to amend the measurment.The contrast experiment proves that the bias of corrected result is better than 0.01%.

导出引用

刘方明,肖凯,王海燕,刘浩,匡义. 关于表计输入阻抗在直流高压分压器检定校准中的影响分析[J]. 计量学报. 2023, 44(5): 771-776 https://doi.org/10.3969/j.issn.1000-1158.2023.05.15

LIU Fang-ming,XIAO Kai,WANG Hai-yan,LIU Hao,KUANG Yi. The Influence of Digital Multimeter Input Impedance in DC High Voltage Dividers Measurement[J]. Acta Metrologica Sinica. 2023, 44(5): 771-776 https://doi.org/10.3969/j.issn.1000-1158.2023.05.15

中图分类号： TB971

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