Method for compensating for a temperature shock on a capacitive pressure-measuring cell

A method for compensating for a temperature shock on a capacitive pressure-measuring cell, which has a measuring capacitor (CM) and a reference capacitor (CR), and, in an evaluation unit, a measured pressure value p is obtained by forming the quotient Q from the capacitance values of the reference capacitor (CR) and the measuring capacitor (CM), and a measured pressure value pM is obtained using the measuring capacitor (CM),

• wherein the temperature shock is identified by comparing the measured pressure values p and pM with each other and the gradient dD of the difference value D of both values is monitored with regard to whether a predefined threshold value is exceeded,
• characterized by the following method steps:
• in a calibration procedure, storing a first correction factor k1 in a lookup table;
• continuously recording and evaluating the difference D;
• multiplying the determined difference value D by the first correction factor k1 and adding the result of the multiplying step to the measured pressure value p to determine a corrected measured pressure value;
• and
• outputting the corrected measured pressure value for further processing.