The invention relates to a method for recognizing a fault when processing input data in a processing system to form a data packet which contains output data and a test data item, the test data item being formed in order to confirm the validity of the output data. The frit was tunneled during sol-gel reaction. An information display unit is coupled to the information acquisition unit and the information acquisition unit is further configured to determine a display location based on the data obtained from the one or more sensors.