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

Coaxial straight-mire resistance standards with calculable frequency depend ence link ac measurements to de measurements of resistance. Here, several c oaxial standards of values 100 Omega and 1000 Omega are compared with each other and with other resistance standards at frequencies of 1592 Hz (omega congruent to 10(4)) and 15920 Hz (omega congruent to 10(5)) using ac bridge s. The data are compared with calculations based on the geometry of this re sistor design, Our results provide;good assurance that the calculations are accurate for the quadrature component of admittance (phase angle), which i s directly proportional to frequency. Frequency-dependent contributions to the in-phase component of admittance, which increase as the square of the f requency, are larger than predicted by the calculations.