the present invention provides a novel method and a system of modules for carrying out thermal analysis of cast iron melts . the characterizing step of the method is de - termination of the position of the thermocouples used for recording cooling curves . the system comprises a thermocouple unit , a thermocouple holder , and a sampling unit . the system comprises means for ensuring that the thermocouples are correctly positioned before starting the thermal analysis . the system also comprises means for automatically transferring calibration data regarding the thermocouples .