The handheld zinc oxide arrester tester is a specialized instrument used for field and laboratory testing of various electrical parameters of arresters. This instrument incorporates advanced technologies such as microcomputer sampling and control, and can measure parameters such as full current, third harmonic, resistive current, resistive current peak value, capacitive current, and active power of the zinc oxide arrester under power frequency voltage. It also displays the voltage and current waveforms and can print out test data.Equipped with a large-screen LCD display and Chinese-language menu prompts, the instrument enhances user interaction, making operation more intuitive. It also provides real-time waveform display on-site. The instrument features simple wiring, high measurement accuracy, and strong reliability. Its compact size, light weight, and integrated design make it easy to carry and operate in the field.