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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
Published in:
Instrumentation and Measurement, IEEE Transactions on
(Volume:50
,
Issue:
6
)
Date of Publication: Dec 2001
- Page(s):
- 1630 - 1633
- ISSN :
- 0018-9456
- INSPEC Accession Number:
- 7187092
- Digital Object Identifier :
- 10.1109/19.982957
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 06 August 2002
- Issue Date :
- Dec 2001
- Sponsored by :
- IEEE Instrumentation and Measurement Society
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