Title :
A high-frequency thermal power comparator
Author :
Budovsky, I. ; Gibbes, A.M. ; Arthur, D.C.
Author_Institution :
Nat. Meas. Lab., CSIRO, Lindfield, NSW, Australia
Abstract :
A new thermal power comparator (TPC) is described that covers a frequency range from power frequencies to 200 kHz. The TPC features a resistive voltage divider and shunts, and a thermal multiplier with two differential high-impedance inputs. It incorporates novel developments in the method of reducing LF and HF errors in the power comparison.
Keywords :
analogue multipliers; calibration; comparators (circuits); differential amplifiers; measurement errors; measurement uncertainty; power measurement; transfer standards; voltage dividers; 200 kHz; AC-DC difference; HF errors; HF thermal power comparator; LF errors; calibration; differential amplifiers; differential high-impedance inputs; error reduction; power-frequency standard; resistive voltage divider; shunts; thermal multiplier; transfer standard; uncertainties; Australia; Calibration; Differential amplifiers; Frequency; Hafnium; Instruments; Inverters; Laboratories; Thermal resistance; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1998 Conference on
Conference_Location :
Washington, DC, USA
Print_ISBN :
0-7803-5018-9
DOI :
10.1109/CPEM.1998.700047
