Automated system for inductance realization traceable to AC resistance with a three-voltmeter method

Author

Callegaro, Luca ; Elia, Vincenzo D.

Author_Institution

Ist. Elettrotecnico Nazionale Galileo Ferraris, Torino, Italy

Volume

50

Issue

6

fYear

2001

fDate

12/1/2001 12:00:00 AM

Firstpage

1630

Lastpage

1633

Abstract

An automatic system for the comparison of unlike impedances in the range 1 Ω-10 kΩ, based on the three-voltmeter method, has been constructed and is undergoing extensive tests as a system for realization of the inductance scale at the Istituto Elettrotecnico Nazionale Galileo Ferraris (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, and optical links for the distribution of frequency references. Measurements at the metrological level have been performed at 1 kHz with inductors in the range 10 mH-1 H

Keywords

direct digital synthesis; electric impedance measurement; electric resistance measurement; inductance measurement; measurement standards; voltmeters; 1 kHz; 1 ohm to 10 kohm; 120 Hz; AC resistance measurement; automated system; four-terminal pair; impedance measurement; inductance measurement; measurement standard; optical link; reference frequency distribution; servosystem; 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;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.982957

Filename

982957