Calibrating temperature sensors of weathering devices by means of contactless temperature measurement

A method for calibrating a temperature sensor by use of a reference temperature sensor, wherein

• the temperature sensor is comprised of a first plate and a temperature-dependent electric component which is included in an electric circuit, wherein the emissivity of the surface of the first plate is unknown, and
• a reference temperature sensor is comprised of a second plate, wherein the emissivity of the surface of the second plate is known;
• the method comprising:
• producing a variable temperature on the surface of the first plate of the temperature sensor and on the surface of the second plate of the reference temperature sensor by applying a radiation corresponding to the solar spectrum simultaneously to the surface of the first plate and to the surface of the second plate,
• measuring the temperature of the surface of the second plate of the reference temperature sensor in a contactless fashion, and
• calibrating an output signal of the electric circuit with the measured temperature.

A method for calibrating a temperature sensor for use in an apparatus for the artificial weathering of samples, wherein

• the temperature sensor is comprised of a plate and a temperature-dependent electric component included in an electric circuit,
• the method comprising:
• providing an apparatus for the artificial weathering of samples, the apparatus comprising a chamber and a radiation source for the emission of radiation corresponding to the solar spectrum,
• producing a variable temperature on a surface of the plate of the temperature sensor by placing the temperature sensor inside the chamber of the apparatus such that the surface of the plate is directed towards the radiation source,
• measuring the temperature of the surface of the plate in a contactless fashion, and
• calibrating an output signal of the electric circuit with the measured temperature.