PTB News 3.2020 – Within the scope of a European metrology research project, PTB is investigating the utilizability of novel quantum Hall resistance standards based on graphene for impedance metrology. The activities aim to develop quantum-based impedance bridges to simplify the calibration of electrical AC voltage quantities for practice-oriented, flexible and efficient use, e.g. in calibration laboratories or in industry. The first measurements performed have already shown very good reproducibility and demonstrated the new method’s potential.
