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Comparison of four QHR systems within one month using a temperature and pressure stabilized 100-Ω resistor

2001; Institute of Electrical and Electronics Engineers; Volume: 50; Issue: 2 Linguagem: Inglês

10.1109/19.918111

1557-9662

A. Satrapinski, Heikki Seppä, B. Schumacher, P. Warnecke, F. Delahaye, W. Poirier, François Piquemal,

Quantum and electron transport phenomena

We have carried out a resistance comparison of four QHR systems using a 100-/spl Omega/ resistor in a temperature-controlled and hermetically sealed enclosure, the comparison was performed in November and December 1998, the participants were Bureau International des Poids et Mesures (BIPM), Bureau National de Metrology-Laboratoire Central des Industries Electroniques (BNM-LCIE) France, Physikalisch-Technische Bundesanstalt (PTB) Germany, and Valtion Teknillinen Tutkimuskeskus (VTT Automation) Finland, acting as a pilot laboratory. The comparison results agree within 3 parts in 10/sup 9/ with a relative combined standard uncertainty of /spl plusmn/1/spl times/10/sup -8/.