METHOD FOR CALIBRATING A GAS SENSOR

摘要

The invention relates to a method for calibrating a gas sensor (1) for determining the concentration of a gas component in a measurement gas chamber (2), wherein the gas sensor (1) has at least one hollow chamber (130) which is connected to the measurement gas chamber (2) via a diffusion barrier (120) and wherein the gas sensor (1) has at least one electrochemical pump cell (3) for electrochemical pumping the gas component into or out of the hollow chamber (130), wherein the method has at least two inward pumping phases (E1, E2) in which the gas component is pumped by the electrochemical pump cell (3) into the hollow chamber (130) and wherein the method has at least two outward pumping phases (A1, A2) in which the gas component is pumped out of the hollow chamber (130) by the electrochemical pump cell (3), wherein, on the basis of at least one feature of the pump current during the outward pumping phases (Maus), at least one piece of information (I) for calibrating the gas sensor (1) is generated, in particular a calibration value (I), preferably the value of a limiting current of the electrochemical outward pumping out of the hollow chamber (130) at a specific measurement gas composition or a value of the diffusion resistance of the diffusion barrier (130) for a specific measurement gas composition, characterized in that a parameter (Rhoein) affecting the inward pumping is specified differently in the at least two inward pumping phases (E1, E2).