The EEC-51 adopts EC impedance plane and Time-based technique, time base curve and EC signal planar graph of real time multi-screen displays testing object All of operations can be handed by instrument’s hint, keypad controlled Standard testing applications are stored in soft and hard disks so that can be transfer anytime The important testing results those can be stored in the soft and hard disks can be freezed up in the screen with words and printed or copied anytime