1. Introduction single phase energy auto-calibration system is a new generation, high precision energy meter calibration equipment. It uses the advanced technology and electronic components available in 90 decade.The test bench can be operated from embedded keyboard or operated from PC software. 2. Feature and function 1) Equipped with electronic phantom load power source, assuring high stability,security and large output capacity. 2)Automatic adjustment of current measurement range. Fault self-detection in voltage amplifier and current amplifier. 3) Equipped with RS-232C interface, can be operated from software. 4) Test results be saved to database, can be inquired from database and can be printed out