A method for calibrating a temperature measuring device having a temperature measuring unit and having at least one sensor connectable to the temperature measuring unit, wherein a temperature calibrator having a sensor mount is provided into which the at least one sensor of the temperature measuring device is inserted and is heated to a test temperature while the at least one sensor is connected to the temperature measuring unit by a sensor cable, wherein the method at least comprises the following steps: - providing a temperature calibrator having a communication module; - setting up a communication channel for data transmission between the temperature calibrator and the temperature measuring device by the communication module; and - transmitting a calibration value from the temperature calibrator to the temperature measuring device by means of the communication channel., wherein the at least one sensor has an ID carrier readable optically or by means of an electromagnetic signal and the temperature calibrator comprises an ID reading unit, wherein the ID carrier of the at least one sensor is read by the temperature calibrator for the automatic recognition of the at least one sensor before the calibration of the ID carrier of the at least one sensor, wherein a data memory is integrated in the temperature calibrator, wherein at least the calibration value is stored, in association, for every calibrated sensor in the data memory, and wherein, on consecutive calibrations of a sensor, an analysis of calibration values being carried out by means of the temperature calibrator so that an aging profile is prepared for every calibrated sensor. wherein the method at least comprises the following steps: - providing a temperature calibrator having a communication module; - setting up a communication channel for data transmission between the temperature calibrator and the temperature measuring device by the communication module; and - transmitting a calibration value from the temperature calibrator to the temperature measuring device by means of the communication channel., - providing a temperature calibrator having a communication module; - setting up a communication channel for data transmission between the temperature calibrator and the temperature measuring device by the communication module; and - transmitting a calibration value from the temperature calibrator to the temperature measuring device by means of the communication channel., wherein the at least one sensor has an ID carrier readable optically or by means of an electromagnetic signal and the temperature calibrator comprises an ID reading unit, wherein the ID carrier of the at least one sensor is read by the temperature calibrator for the automatic recognition of the at least one sensor before the calibration of the ID carrier of the at least one sensor, wherein a data memory is integrated in the temperature calibrator, wherein at least the calibration value is stored, in association, for every calibrated sensor in the data memory, and wherein, on consecutive calibrations of a sensor, an analysis of calibration values being carried out by means of the temperature calibrator so that an aging profile is prepared for every calibrated sensor.