Method for calibrating a temperature sensor located in a process of automation technology

A temperature measuring apparatus comprising a temperature sensor in a process of automation technology, and a control/evaluation unit for performing the following method:

• ascertaining at least one variable for calibrating the temperature sensor during the process from the temperature sensor, which is to be calibrated, by measuring the temperature of the process for at least one cycle of the process after installation of the temperature sensor in the process, wherein the variables are a temperature measuring range, a reference temperature and a time span;
• specifying the temperature measuring range, which is passed through in the recurring process of automation technology;
• specifying the reference temperature arising in the temperature measuring range;
• specifying the time span, during which the temperature measured values plateau in the temperature measuring range;
• determining temperature measured values by using of the temperature sensor;
• detecting whether temperature measured values plateau in the temperature measuring range during the specified time span;
• and
• correcting the measured value of temperature in the temperature measuring range to the reference temperature.