Ultra-High Resistance Measurement Based on Offset Current Compensation

Xiao Jun Wang; Yong Jie Zhao; Jian Xue

doi:10.4028/www.scientific.net/AMM.373-375.856

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 373-375Ultra-High Resistance Measurement Based on Offset...

Ultra-High Resistance Measurement Based on Offset Current Compensation

Abstract:

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 10¹⁴Ω and 5.5% for 10¹⁵Ω under ±1000V based on the offset current compensation method proposed, which has been successfully implemented in a commercial UHR meter.

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Periodical:

Applied Mechanics and Materials (Volumes 373-375)

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856-860

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.373-375.856

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Online since:

August 2013

Authors:

Xiao Jun Wang, Yong Jie Zhao, Jian Xue

Keywords:

Compensation, Offset Current, Ultra-High Resistance Measurement

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