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An intercomparison of resistance standards at 10 kilo-ohm and 1 kilo-ohm was carried out by transporting four resistors to various laboratories where measurements were made in terms of the local standards. The results of these measurements are presented in terms of the representation of the ohm used at the Bureau International des Poids et Mesures (BIPM). The methods adopted by each laboratory are described briefly and the uncertainties of the measurements are discussed. The typical overall standard error of the linear fit to all the data is +/-0.2 ppm. These results demonstrate that resistance intercomparisons can be carried out at the one standard level of about +/- 0.2 ppm or twice the one standard deviation uncertainty of the participating laboratories, whichever is the greater. Any changes in the values of the travelling resistors, other than the natural drift, appear to be less than 0.1 ppm. Resistors of the type used in this intercomparison are suitable for comparing the resistance standards of national laboratories at the level of uncertainty quoted above.

Additional information

Authors: JONES R G, National Physical Laboratory, Teddington (GB)
Bibliographic Reference: EUR 12945 EN (1990) 35 pp., MF, ECU 4, blow-up copy ECU 5
Availability: (2)
Record Number: 199110071 / Last updated on: 1994-12-02
Original language: en
Available languages: en
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