A multifrequency quadrature bridge

Author

Bohacek, J.

Author_Institution

Fac. of Electr. Eng., Czech Tech. Univ., Prague

Volume

1

fYear

2001

fDate

21-23 May 2001

Firstpage

102

Abstract

A coaxial multifrequency quadrature bridge for linking capacitance and resistance standards has been realized. A precision ratio transformer having two cores and two secondary windings forms the fixed ratio arms of the bridge and two eight-decade two-stage inductive voltage dividers are used for the in-phase balancing. Most frequently, the bridge is used to calibrate 10 nF standard capacitors by comparing them with 12 906 Ω or 10000 Ω reference resistors. The calibration uncertainty (k=2) is less than 1 part in 10⁵ in a frequency range from 400 Hz to 5 kHz. After being calibrated by means of the quadrature bridge, the 10 nF capacitors serve as reference standards for calibration of capacitors of lower values

Keywords

bridge circuits; calibration; capacitance measurement; capacitors; electric resistance measurement; measurement standards; measurement uncertainty; resistors; voltage dividers; 10 nF; 10000 ohm; 12906 ohm; capacitance standards; coaxial multifrequency quadrature bridge; fixed ratio arms; in-phase balancing; inductive voltage dividers; low calibration uncertainty; precision ratio transformer; reference resistors; resistance standards; standard capacitors; Arm; Bridge circuits; Calibration; Capacitance; Capacitors; Coaxial components; Joining processes; Resistors; Transformer cores; Uncertainty;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 2001. IMTC 2001. Proceedings of the 18th IEEE

Conference_Location

Budapest

ISSN

1091-5281

Print_ISBN

0-7803-6646-8

Type

conf

DOI

10.1109/IMTC.2001.928795

Filename

928795