The Model 100 calibration system consists of a uniform heating plate, controller, and Type K thermocouple that is used to heat and test metal samples over the temperature range of ambient to 950°F (510°C). This system provides a fast and simple offline method to verify the accuracy of infrared sensors and thermocouple probes on specific test samples. It is used to determine the proper TRUSET setting, SIF (Surface Index Factor) adjustment, and/or emissivity of a surface by using a thin wire thermocouple embedded in the test sample. It is commonly used as a reference source for characterizing aluminum and other low emissivity materials plus it can be used as an approximate blackbody reference when looking at a flat black painted metal surface. This calibration system eliminates the uncertainty regarding application errors associated with surface emissivity.