The invention relates to a method for start-up of a sensor, comprising at least the following steps: performing a factory adjustment during the manufacture of the sensor; permanent storage of adjustment data from the factory adjustment in a memory of the sensor; delivering the sensor to the customer; and performing an initial user adjustment. The method is characterized in that adjustment data from the initial user adjustment in the memory of the sensor are stored permanently, thereby making it possible to improve the status evaluation of the sensor. The invention further relates to a computer program product, a machine-readable data carrier and a sensor.