Development on a High-Precision Intelligent Measurement Instrument for Low-Value Resistance

摘要

A high-precision intelligent measurement instrument for low-value resistance is presented. The marked characteristics of the instrument are large-scale (1μΩ—2MΩ) and high-precision (maximum relative error of 0.05%±2 characters). To eliminate the effect of ineluctable resistances of wires and random contact, the method of four wires measurement is used in the instrument. With a handler interface, the instrument is potential to be connected to a roboticized production line of resistance implementing automatic selection of resistance. Furthermore, PC can communicate with the instrument in virtue of a virtual panel programmed by VC++ 6.0 via RS-232 interface and real-timely monitor the process of production.