METHOD FOR CHECKING THE FUNCTION OF A PRESSURE SENSOR

摘要

The invention relates to a method for checking the function of a pressure sensor for detecting the pressure in a medium, wherein the pressure sensor comprises a pressure measuring cell having an elastic membrane, on which a first electromechanical transducer and a second electromechanical transducer are arranged, and a temperature sensor for detecting the temperature at the two transducers. The first electromechanical transducer has a first temperature characteristic curve that represents the error influence of the temperature on the measurement result of the first electromechanical transducer, and the second electromechanical transducer has a second temperature characteristic curve that represents the error influence of the temperature on the measurement result of the second electromechanical transducer. The two temperature characteristic curves have been adapted to each other in an adjustment procedure. By calculating the difference between the temperature-compensated measured values, faulty function of the temperature sensor and/or of the electromechanical transducers can be determined if said difference significantly exceeds or falls below a specified threshold value.