The ZC-313 vacuum Interrupter tester abandons the traditional withstand voltage method and uses the magnetic discharge method for measurement, so there is no need to disassemble the arc extinguishing chamber. The use of a single-chip microcomputer for synchronous control and data acquisition processing improves the on-site testing sensitivity of the vacuum degree in the arc extinguishing chamber. This product has a compact structure, a lightweight and compact model, shorter testing time, higher measurement reliability, stability, accuracy, and more complete functions.