A Bridge for Scaling to Higher Resistance from the QHR

Published

August 21, 2003

Author(s)

Randolph Elmquist, Dean G. Jarrett

Abstract

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)

Pub Type

Conferences

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Keywords

quantized Hall resistance, resistance scaling, calibration, Electrical resistance

Citation

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], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=31323 (Accessed November 3, 2025)