Automatic self-calibration system for digital teraohmmeter

摘要

An automatic self-calibration system for digital teraohmmeter wherein a built-in standard resistor is provided. The system is able to calibrate the values of the key components by taking the standard resistor as reference. The calibration procedure of the invention is controlled by a computer and executed automatically. The system is used to measure high- resistance standards up to 10.sup.15 &OHgr; where the standard uncertainty does not exceed 100 ppm after a traceable calibration.