Background:The direct current power supply is one of the most important subsystems of heavy ion research facility in Lanzhou(HIRFL)

and the accuracy of control parameters has significant influence on power supply status judgment and beam tuning effect.Purpose:To optimize the control parameters which can secure the power supply’s read value is consistent with set value

the fundamental process of power supply’s consistency calibration is introduced in this paper.Methods:The principle of linear transformation is used to derive control parameters’ formulas

and a calibration program which based on LabVIEW is designed.Results:The program gets power supply’s operation data through dynamic data exchange technique;then it calculates optimized control parameters.Conclusions:Both real calibration and simulation result indicate that the used method is correct

and the optimized control parameters can fulfill the accuracy requirement of power supply’s consistency calibration.