Flexible system for precision and automatic comparison of AC measuring devices

Author

Pogliano, Umberto ; Bosco, Gian Carlo ; La Paglia, Giuseppe ; Zago, Giancarlo

Author_Institution

Instituto Elettrotecnico Nazionale ´´Galileo Ferraris´´, Torino, Italy

Volume

42

Issue

2

fYear

1993

fDate

4/1/1993 12:00:00 AM

Firstpage

295

Lastpage

300

Abstract

A multipurpose modular system for comparison of AC-DC converters and other AC measuring devices was built at IEN. It allows the performance of measurements for a large set of devices in a wide range of voltages and currents. In particular, for currents up to 2 A, a special transconductance amplifier that supplies the current keeping the conjunction point of the two devices under comparison virtually at ground potential is integrated. The comparison system takes full advantage of automatic procedures, but with accuracy typical of the best manual systems. For example, groups of single-junction thermal converter comparisons show a typical spread (1σ) of less than 1×10^-7

Keywords

calibration; computerised instrumentation; convertors; electric current measurement; measurement standards; voltage measurement; 0.2 to 1000 V; 2 A; 2.5 mA to 20 A; AC measuring devices; AC-DC converters; IEN; automatic comparison; multipurpose modular system; transconductance amplifier; AC-DC power converters; Calibration; Current measurement; Current supplies; Measurement standards; Measurement uncertainty; Microcomputers; Transconductance; Voltage; Voltmeters;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.278569

Filename

278569