APPLICATION OF ACTIVE COMPENSATED FOUR-COAXIAL CABLES TO AC RESISTANCE STANDARDS COMPARISON
F. Cabiati, V. D'Elia
Abstract:
The general features of active connection structures based on four-coaxial cables are summarised and their application to four-port resistance standards to allow them to be compared by means of a conventional transformer bridge is shown. As a test of the measurement method, a comparison between the easurements performed at IEN and at the CTU on a well characterised resistance standard with nominal value equal to the quantised Hall resistance at the i = 2 plateau (12 906,4 W) has been carried out. Some details about the eference resistor, the calculable resistors and the measuring systems are reported together with the results of the comparison.
Keywords:
impedance measurement, multiconductor coaxial cable, ac standard resistor
