Temp. cooling curve measurement for metal sample thermoanalysis - triggers standard exponential signal and later compares cooling sample temp. with standard

摘要

A temperature transducer the voltage output of which represents the sample temperature feeds two difference circuits one through a two pole switch. The output of this feeds a control network incorporating a standard resistance capacitance time constant, which supplies a feedback signal via the two pole switch to the same difference network. By switching the signals in the correct sequence, the temperature and voltage decay can be started simultaneously, and a check of their later difference registered via the second difference circuit. The network may use a glass fibre infrared transmission line between sample and pyrometer transducer.