Measurement of Thermoelectric Power Sensors Using a Thermal Voltage Converter of 1 kHz to 1 MHz

To measure the calibration factor or the effective efficiency of thermoelectric power sensors (PSs) in the low frequency range a reference thermal voltage converter (TVC) is employed. A modified RF voltage measurement system enables us to transfer the RF voltage standard of the TVC to the PS. The standard RF power is obtained from the RF voltage at the input of the PS and the measured conductance of the PS. Comparing the RF power to DC substituted power of the PS gives the effective efficiency. Evaluated measurement uncertainty is 1.7% ( k=2) in the frequency range of 1 kHz to 1 MHz.