Keywords: cooling curve method, testing principle, probe, controllable temperature, heating furnace, heating, temperature, recording, cooling process, data,

　　The test principle of the cooling curve method is: place the test probe in a temperature-controllable heating furnace to heat to the specified temperature, and then quickly throw it into the medium to be tested. The data acquisition system records the cooling process data in real time. After A/D conversion, the computer processes, calculates and outputs the data to the printer, print out the complete cooling process curve and cooling rate curve and data report. In order to ensure the test accuracy, multiple clutter filtering and abnormal data correction systems are often added in the process of data processing and calculation to eliminate interference.

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