Progress in measurements with the ETF voltage balance

The results of two series of measurements with the ETF-84 voltage balance carried out in 1987 and 1988, using the classical method of weighting, were previously presented by the authors (1988) with the proviso that some systematic errors had not been accounted for. Detailed analyses of these errors are not in progress, as are numerous experiments to determine the possible corrections and to estimate their uncertainties. A method for measuring the capacitive current when moving the high-voltage electrodes with a constant speed is established. In this method, there is no need to measure the AC capacitance between the electrodes