Abstarct: In this study, one of the types of high voltage measurement methods called Generating Voltmeter (GVM) was investigated. baxsed on the mentioned method, the desired GVM was designed, simulated and constructed. The effect of parameters such as number of stators slots, material, diameter and thickness of stator and rotor blades, distance between stator and rotor surfaces, distance between stator and high voltage accelerator terminal surfaces, was investigated on operating conditions of the GVM using CST Studio Suite. Design, construction and calibration of a prototype GVM is one of the most important parts of the study. Finally, the desired GVM was designed for using in dynamitron.