Online testing, monitoring, recording AC Leakage current. It is used to find out the cause of insulation failure, to find the circuit of insulation fault, to monitor the intermittent leakage fault, to see the time of insulation failure, the inspection circuit and so on. The current clamp adopts magnetic shielding and digital integration technology, which has strong anti-interference and high precision. System clock function. Data storage function, large storage space. Equipped with RS232 interface, communication lines and software, monitoring software with online real-time monitoring and historical data reading, access, preservation, statements and other functions.