Calibrating a sampling voltmeter using a binary Josephson system

A binary Josephson system was used to characterize an 81/2-digit sampling voltmeter. This voltmeter is the heart of the primary standard for power at 50 Hz or 60 Hz at several National Metrology Institutes (NMIs). In this paper, we present first results on the calibration of the voltmeter under conditions that mimic its use in the power standard set-up. Furthermore, the dependence of the root-mean-square (rms) voltage FRMS on the aperture time is presented.