A hipot tester is an instrument used to test the withstand voltage capabilities of electrical devices, insulating materials, and insulating structures. The hipot tester usually consists of three modules: a program-controlled power supply module, a signal acquisition and conditioning module, and a computer control system. The hipot tester is an important tool for checking the voltage withstand capability of insulating materials and insulating structures, so its calibration and maintenance are crucial to ensure the accuracy and reliability of test results.