AIM QuTE: Automated Impedance Metrology extending the Quantum Toolbox for Electricity

Abstract

Abstract. The "Automated impedance metrology extending the quantum toolbox for electricity" project (AIM QuTE) will extend Josephson impedance bridges capabilities to the whole complex plane with the best level of uncertainties (0.05 ppm). In parallel, fully digital bridges will be developed to reduce the operator workload imposed on national metrology institutes for the realisation of the impedances scales and for calibrations. The target level of uncertainty for these fully digital bridges is parts in 10 -7. Furthermore, sub-pF standards will be developed to establish traceability of very small capacitances. An electronic impedance simulator, which will cover a very large region of the complex impedance plane, will also be realised, it will significantly reduce the number of standards required to link traceability of top level calibration laboratories to national metrology institutes.

The Role and Importance of Digital Impedance Bridges in Contemporary Metrology

“…Ponadto stabilizacja temperatury modułów w obudowie PXI jest niewystarczająca. Dlatego też krajowe instytuty metrologiczne, we współpracy z uczelniami lub producentami sprzętu elektronicznego, podejmują próby konstruowania własnych rozwiązań niekomercyjnych [23][24][25]. W ostatnim dziesięcioleciu niekwantowe mostki impedancyjne wdrożyły do stosowania instytuty metrologiczne m.in.…”

“…Najważniejszą zaletą i nowością systemu, w porównaniu z alternatywnymi rozwiązaniami [14,16], jest zastosowanie dwukanałowego precyzyjnego syntetyzowanego cyfrowo źródła napięcia przemiennego [24]. Opracował je zespół badaczy z Politechniki Śląskiej w ramach międzynarodowego projektu EMPIR SIB53 AIM QuTE: Automated impedance metrology extending the quantum toolbox for electricity [23,25]. Uproszczony schemat ideowy mostka przedstawiono na rys.…”

An international comparison of phase angle standards between the novel impedance bridges of CMI, INRIM and METAS

“…The project, running from 2013 to 2016, brought together National Metrology Institutes (NMIs) from Spain, Czech Republic, Italy, France, Switzerland, Poland, Finland, Germany, Sweden, Denmark and Turkey and a German calibration laboratory. A full description of the project is presented in [27] and on the project website [28].…”

Primary measurement method for the characterisation of impedance standard in the mΩ range

“…Currently, In order to improve traceability of impedance results in the full complex plane, a few impedance bridges and impedance standards have recently been developed [4][5][6][7]. Results of comparison of electrical impedance standards have recently been reported in the framework of the AIMQute project [8]. That comparison, which is the first of its kind, involves a standard impedance angle with a phase angle of ±30 • and ±60 • and, and a magnitude ranging from about 100 Ω to 1 MΩ.…”