Coaxial Shunts as AC–DC Transfer Standards of Current

Author

Pogliano, Umberto ; Bosco, Gian Carlo ; Serazio, Danilo

Author_Institution

Electromagn. Div., Ist. Naz. di Ricerca Metrologica, Turin

Volume

58

Issue

4

fYear

2009

fDate

4/1/2009 12:00:00 AM

Firstpage

872

Lastpage

877

Abstract

A new type of coaxial shunt, with nominal current ranges from 20 mA to 20 A, has been designed at the Istituto Nazionale di Ricerca Metrologica (INRIM). Depending on the nominal current, different construction methods have been employed. For current ranges between 100 mA and 20 A, the shunts are made using disk structures, either with surface mount (SMD) resistors or resistive layers. To reduce coupling, the structures have a very small magnetic interaction between the input current and the output voltage circuits, resulting in a flat response over a wide frequency range. This paper presents design and construction details of these shunts, as well as measurement results and plans for further development.

Keywords

electric current measurement; resistors; surface mount technology; AC-DC current transfer standards; INRIM; Istituto Nazionale di Ricerca Metrologica; coaxial shunts; current 20 mA to 20 A; disk structures; resistive layers; surface mount resistors; Current measurement; electric variable measurement; resistors; thick-film resistors; transfer standards;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

Conference_Location

12/16/2008 12:00:00 AM

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2008.2008469

Filename

4717236