Calibration of High Accuracy Wattmeters with a Standard Generator

After recalling the methods used to calibrate primary standard wattmeters, the paper describes the development of a standard generator of ac power, based on a computable ac/dc transfer generator with two ac voltage outputs (2 X 10 Veff). The methods used to calibrate the individual elements of the power generator are described. Estimates of the stability and of the total uncertainty (based on the analysis of the individual uncertainty terms) are given.