Title :
Automated system for inductance realization traceable to AC resistance with a three-voltmeter method
Author :
Callegaro, Luca ; Elia, Vincenzo D.
Author_Institution :
Ist. Elettrotechnico Nazional Galileo Ferraris, Torino, Italy
Abstract :
An automatic system for the comparison of unlike impedances in the range 1Ω-10 MΩ, based on the three-voltage method, has been constructed and is undergoing extensive tests as a system for realization of the inductance scale at IEN in the range 100 μH-10 H at frequencies of 120 Hz and 1 kHz. The main features of the system are: a two-phase direct-digital synthesis generator for energizing the standards, complete four terminal pair definition of the standards with automatic servosystems, the use of a single high-accuracy voltmeter and a switching unit, optical links for the distribution of frequency references. Measurements at metrological level have been performed at 1 kHz with inductors in the range 10 mH-1 H
Keywords :
direct digital synthesis; inductance measurement; measurement standards; voltmeters; AC resistance; IEN; automated system; automatic servosystems; four terminal pair definition; frequency references; high-accuracy voltmeter; inductance realization; inductance scale; switching unit; three-voltmeter method; two-phase direct-digital synthesis generator; Automatic testing; Frequency synthesizers; Impedance; Inductance; Inductors; Optical fiber communication; Performance evaluation; Servosystems; System testing; Voltmeters;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2000. IMTC 2000. Proceedings of the 17th IEEE
Conference_Location :
Baltimore, MD
Print_ISBN :
0-7803-5890-2
DOI :
10.1109/IMTC.2000.848822
