Thermocouple temperature measurement circuit with the cold contact point compensation

Published:2011/5/26 8:22:00 Author:Christina | Keyword: Thermocouple, temperature measurement, cold contact point, compensation | From:SeekIC

The thermocouple temperature measurement circuit with the cold contact point compensation is as shown. This circuit is composed of the preamplifier LM321 and the operational amplifier LM308A. The LM321 has the temperature characteristic of lμV/℃. If the maladjustment voltage is zero, the temperature drift is zero too; if there is the maladjustment voltage, it will produce the temperature drift, this temperature drift can be used in the thermocouple's cold contact point compensation.



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