An Equipment for Voltage-Transducers Calibration Oriented to the Uncertainty Estimate in DSP-Based Measurements

Nominal accuracy specifications of voltage transducers cannot be used to determine the uncertainty affecting the instantaneous values of the output signals; hence, the uncertainty in the measurements performed by DSP-based instruments cannot be estimated. A programmable equipment, which is designed to solve such a problem and which implements the characterization procedure of analog-signal conditioning blocks described in a previous contribution, is presented in this paper. The uncertainty sources located in the hardware of the setup are analyzed, and their effects on the measurement results are evaluated. Finally, on the basis of the equipment metrological characterization, the performance of the implemented methodology is discussed.