Automating wide-band AC/DC transfer measurements

A semiautomatic rms ac/dc transfer standard that permits a 30-fold increase in the rate at which transfer measurements can be made is described. The precision of measurement is ±50 ppm in the automatic mode and ±10 ppm in the manual mode. A novel contactless overload protection circuit is included which allows waveforms of any crest factor up to the breakdown voltages of the components to be measured. The instrument is suitable for programmable operation making it adaptable to systems operation.