What does ATC- temperature calibration mean?

The ATC function is used to compensate for a temperature difference that may occur between the circulator temperature control and a defined measuring point. When using a reference thermometer, the actual temperature can be determined at any measuring point (circulator bath or external application).The ATC function calibrates the circulator control to the reference value. The internal temperature sensor as well as the external sensor (if an external sensor connection exists) possible.