High Precision Low-cost Method of Resistance Measurement
Qing Li · Yibiao jishu yu chuanganqi · 2011
In this paper,several co mmonly used current method of resistance measurement were analyzed and measurement of their characteristics caused problems,so as to propose a new measurement method.This method eliminates the changes in the test environment,especially temperature gain of the circuit due to changes in offset voltage drift and the impact on measurement accuracy,low-cost devices can be used to achieve high-precision resistance measurements.The results show that:from 5 ℃ to 35 ℃ ambient temperature,10 mΩ~1 MΩ full-scale range,the maximum measurement error is 0.05%.