Power sensor calibration and uncertainties

Power measurement accuracy depends on the accuracy of power sensor calibration. Modern power sensors and meters offer much wider dynamic range and more error correction capabilities than the previous generation of power measuring instruments. The test systems used to calibrate the previous generation of power sensors are no longer adequate to calibrate these new sensors. While the fundamental principles of power sensor calibration still apply, there are new requirements that must be addressed. A review of the average power measurement fundamentals will be given. The new calibration system requirements will be discussed. Uncertainty analysis, in accordance with the ISO Guide on the Uncertainty of Measurements, will be presented.