Investigation of Temperature Coefficients of New Impedance Standards

The paper addresses issues related to the temperature stability of new impedance standards used at National Measurement Institutes. A brief description of the new infrastructure for impedance metrology recently developed in Poland is provided. Additionally, the paper presents the results of measurements of temperature coefficients for four-port resistance standards. It also includes a brief report on the stability test results of a set of temperature-controlled (ovenized) standard capacitors. The findings indicate very good temperature stability of the impedance of the standards and serve as an important source of information for selecting environmental conditions during comparisons at the highest metrological level.