A new method for evaluating measurement uncertainty of AC impedance

Based on measurement of AC impedance, this paper presents a new method for evaluating measurement uncertainty of AC impedance. The method of equal potential measurement is introduced, which can calibrate AC impedance and trace to voltage ratio standard and phase standard by adjusting the current in the circuit. What's more, the measurement data of 1 kHz, 100 Ω is given in the paper, whose measurement uncertainty is evaluated.