Characterization of four-terminal-pair resistance standards: a comparison of measurements and theory

Abstract

Coaxial straight-wire resistance standards with calculable frequency dependence, link AC measurements to DC measurements of resistance. Several coaxial standards of values 100 /spl Omega/ and 1000 /spl Omega/ are compared with each other and with other resistance standards at frequencies of 1592 Hz (/spl omega//spl cong/10/sup 4/) and 15920 Hz (/spl omega//spl cong/10/sup 5/) using AC bridges. The data are compared with calculations based on the geometry of this resistor design. Our results provide good assurance that the calculations are accurate for the quadrature component of admittance (phase angle), which is directly proportional to frequency. Frequency-dependent contributions to the in-phase component of admittance, which increase as the square of the frequency, are larger than predicted by the calculations.