Design of USB-Based Calibration Equipment for Insulation Resistance Meter

Calibration equipment for insulation resistance meter is of importance to ensure the accuracy of insulate test for electrical device.However,the calibration procedure is complicated because of various records and operations.This paper designs the USB-based calibration equipment for insulation resistance meter.The new equipment uses the low-cost microcontroller for data acquisition including temperature,moisture,impendence and voltage.And the data management software is developed based on the virtue instrument techniques.The microcontroller sends data to the computer where the calibration results are then given automatically.The USB-based calibration equipment for insulation resistance meter has the major advantages of reducing manual operations and managing the calibration results,which make the calibration procedure efficiently and automatically.