Determination of frequency-independent component of AC-DC transfer difference of SUT's calculable AC voltage standards

The article describes determination of value of frequency-independent component of AC-DC voltage transfer difference of calculable thermal AC voltage standards developed and maintained at Silesian University Technology (SUT). According to our research, the value of this parameter is within ±0.1 μV/V with combined standard uncertainty of 0.4 μV/V. The obtained results will be used to supplement the uncertainty budgets of these standards. The proposed method can be used to determine frequency-independent component of AC-DC voltage transfer differences of thermal AC voltage standards when a quantum AC voltage standard is unavailable.