A Dual-Channel Calibration System for AC Currents and Small AC Voltages

Author

Djokic, Branislav

Author_Institution

Meas. Sci. & Stand., Nat. Res. Council of Canada, Ottawa, ON, Canada

Volume

64

Issue

6

fYear

2015

fDate

Jun-15

Firstpage

1773

Lastpage

1778

Abstract

A new current-comparator-based dual-channel calibration system for AC currents and AC voltages in the millivolt range has been developed. The range of generated currents is 1 mA-5 A, and the range of generated voltages is 1-500 mV. The calibration system in-phase and quadrature expanded measurement uncertainties (k = 2) are within 25 · 10^-6. Although the system has been developed primarily for operation at power frequencies, it is also capable of operating at frequencies up to 1000 Hz with slightly increased uncertainties. The traceability to SI units is established through the calibration of AC voltage by means of AC/DC transfer and DC voltage reference, standard resistor, capacitor, and current comparator ratios.

Keywords

calibration; capacitors; current comparators; electric current measurement; measurement uncertainty; resistors; units (measurement); voltage measurement; AC current measurement; AC voltage calibration; AC voltage measurement; AC-DC transfer; DC voltage reference; SI units; calibration system in-phase measurement uncertainty; capacitor; current 1 mA; current 5 A; current comparator ratio; current comparator-based dual channel calibration system; quadrature expanded measurement uncertainty; standard resistor; voltage 1 mV to 500 mV; Calibration; Capacitors; Current measurement; Resistors; Uncertainty; Voltage measurement; Windings; AC current measurement; AC voltage measurement; calibration; current comparator (CC); digital sampling; measurement uncertainty; measurement uncertainty.;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2015.2408801

Filename

7094300