In some applications the used sensors for acquisition systems either cannot be calibrated or they have lost their calibration. In such cases, when a functional relation between the acquired magnitudes is known, an off-line calibration of the sensor based on the functional relation is possible, using a regularization technique presented in the paper. The method was applied to the calibration of the sensors used in the acquisition system of currents in an electrolysis cell from ALRO Slatina plant.

Keywords: Uncalibrated sensors, Tikhonov regularization, Off-line calibration, Noisy signal.