Ultra-High Resistance Measurement Based On Offset Current Compensation

被引：0
|
作者：
Wang, Xiaojun [1 ]
Zhao, Yongjie [2 ]
Xue, Jian [2 ]
机构：
[1] Southeast Univ, Key Lab Measurement & Control Complex Syst Engn, Minist Educ, Nanjing, Jiangsu, Peoples R China
[2] Nanjing Tongsheng Instrument Technol Co Ltd, Nanjing, Jiangsu, Peoples R China
来源：
MECHATRONICS, ROBOTICS AND AUTOMATION, PTS 1-3 | 2013年 / 373-375卷
关键词：
Ultra-High Resistance Measurement; Offset Current; compensation;
D O I：
10.4028/www.scientific.net/AMM.373-375.856
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
An on-line offset current compensation method is proposed to improve ultra-high resistance (UHR) measurement more accurately and reliably. Iterative compensation algorithm is firstly adopted to generate compensation current by adjusting the compensation DAC to decrease the offset current to approximate zero, and then on-line offset current measurement algorithm is employed to ensure the time-varying offset current is always in an appropriate range. This algorithm can maintain a continuous unsaturated measurement process. Experiment results show that the uncertainty (k=2) is 1.4% for 10(14)Omega and 5.5% for 10(15)Omega under +/- 1000V based on the offset current compensation method proposed, which has been successfully implemented in a commercial UHR meter.
引用
收藏
页码：856 / +
页数：2
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