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 2003 NCSL International Workshop and Symposium
August 17-21, 2003
Tampa, FL, USA
National Conference of Standards Laboratories (NCSL)
and Jarrett, D.
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 September 27, 2023)