This Series Of Programmable Voltage Tester Are Using High-Speed MCU And Large Scale Digital Circuit Design Of High Performance Safety Test Instrument,The Size Of The Output Voltage,The The Rise And Fall Of Output Voltage,The Frequency Of Output Voltage Are Controlled By The MCU Completely.It Can Display The Breakdown Current Value And The Voltage Value In Real Time.And Has The Function Of Software Calibration.Can Test The Breakdown Voltage,Leakage Current And Other Electrical Safety Performance Indicators Of Various Objects Intuitive,Accurate And Fast.And It Can Be Used As A High Voltage Source To Test The Performance Of Components And The Whole Machine.It contains RK7110,RK7120,RK9910A,RK9920A,RK9910B,RK9920B Series Programmable withstanding Voltage tester.