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A Bridge for Scaling to Higher Resistance from the QHR



Randolph Elmquist, Dean G. Jarrett


A two-terminal bridge for resistance scaling directly from the quantum Hall resistance (QHR) to higher-resistance values now provides a secondary starting point in decade scaling at NIST, beginning at the 1 M(Ohm) resistance level. This cryogenic bridge has better repeatability and lower uncertainty than Hamon transfer standard scaling. Better scaling will support the high-resistance measurement service at 10 M(Ohm) and above, for which NIST has constructed improved standards with low voltage coefficients. 1 M(Ohm) standard resistors calibrated using this bridge have helped NIST provide better uncertainty for the ongoing NCSLI inter-laboratory comparison using air-type and oil-type 1 M(Ohm) transfer standards.
Proceedings Title
Proceedings 2003 NCSL International Workshop and Symposium
Conference Dates
August 17-21, 2003
Conference Location
Tampa, FL, USA
Conference Title
National Conference of Standards Laboratories (NCSL)


quantized Hall resistance, resistance scaling, calibration, Electrical resistance


Elmquist, R. and Jarrett, D. (2003), A Bridge for Scaling to Higher Resistance from the QHR, Proceedings 2003 NCSL International Workshop and Symposium, Tampa, FL, USA, [online], (Accessed May 29, 2024)


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Created August 20, 2003, Updated October 12, 2021