DIGITAL_TEMPERATURE_MEASURING_CIRCUIT

Published:2009/7/7 2:50:00 Author:May | From:SeekIC

The output voltage of a thermocouple is converted into frequency measured by a digital frequency meter. The measuring set connected with Ni-NiCr thermocouple permits you to measure the temperatures within the range of 5℃ - 800℃ with ±1℃ error. The output thermocouple signal is proportional to the temperature difference between the hot junction and the thermostat kept at 0 ℃, it drives the voltage-to-frequency converter changing the analogue input signal into the output frequency with the conversion ratio adjusted in such a way, that the frequency is equal to the measured temperature in Celsius degrees, e.g., for350℃ the frequency value is 350 Hz.



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