This series of program-controlled ultra-high voltage testers?are designed to provide high-voltage withstand voltage test and analysis for high-voltage optocouplers, high-voltage relays, high-voltage switches, PV modules and other devices with high insulation resistance. High-speed MCU and large-scale digital circuits are used. The designed high-performance safety tester, the output voltage, the rise and fall of the output voltage, and the frequency of the output voltage are completely controlled by the MCU, which can display the breakdown current value and voltage value in real time, and has a wireless remote control function. PLC, RS232C, RS485, USB, LAN interface, it is convenient to form a comprehensive test system with computer or PLC system. It can quickly and accurately measure the safety of household appliances, instruments, lighting appliances, electric heating tools, computers, and information equipment. The sine wave required for the output high voltage is generated by the DDS principle, and the negative feedback technology is used to make the output waveform pure and stable