The practical realisation of voltage, current, power and energy in the sinusoidal and time varying regime are performed in this laboratory, with traceability to the fundamental constants through Josephson and quantum Hall effects.
Thermal ac-dc transfer and high-accuracy waveform sampling methods are employed. The available measurement systems are:
- an automatic electromotive force comparator;
- digital phase comparators;
- primary sampling wattmeter and broadband digitisers for power and "power quality" measurements.