Abstract:Based on USB Bus, Design the miniaturization, modularization, all-purpose digital multimeter with self-reacting, photoelectric isolate, TRMS/DC, self-correcting technology. This multimeter has higher accuracy and stability, 5½ The digital display of location, can finish the measurement of projects such as DVC,AVC,DVI.AVI, resistance of Line 2/4 etc., and can work for ATS ad digital multimeter module.