“A set of automatic calibration system for beam position detector has been developed in the renovation project of high-energy synchrotron radiation source and Beijing Electron Positron Collider. The system is capable of fully automated probe calibration, meeting application requirements and achieving expected functions. Calibrated within the entire range, the BPM accuracy can reach 40 microns, and calibrated in the local linear region, the BPM accuracy can reach 7 microns.”