ACCURATE UNIVERSAL SET OF AUTOMATIC COMPARATORS FOR IMPEDANCE PARAMETERS UNITS REPRODUCTION AND TRANSFER

M. Surdu, A. Lameko, D. Surdu, S. Kursin, M. Mukharovsky, A. Akhmadov,S. Shevkun

Abstract

Comparison and unit transfer of the impedance parameter is provided using a lot of different very complicate manual bridges with numerous different standards. The main world-renowned laboratories (BIPM, NIST, NML, NPL, PTB, VNIIM, etc) in developed countries have their own primary standards, based on the Calculable Capacitor and appropriate transformer bridges, on the Quantum Hall Resistance and appropriate bridges and very accurate quadrature bridges for comparison of different impedance parameters, having original constructions. All these bridges constitute a very complicate set of devices that have long and intricate balance processes. In addition, these bridges and standards are divided into different sets and are disposed in various laboratories. The process of calibration and traceability is, therefore, complicate and very expensive. The project (No 2244, Science and Technology Center in Ukraine, see site www.stcu.int) supported by the USA and the EU, was aimed to create the set of accurate automatic bridges-comparators and the set of thermostated intermediary standards for impedance units traceability and reproduction. Here we show the results of the implementation of this project.

Keywords

impedance, measurement, traceability, unit reproduction, precision, uncertainty

Download

IMEKO-TC4-2011-026.pdf

DOI

-

IMEKO TC

TC4 - Measurement of Electrical Quantities

Back to the proceedings