Loop elimination, cold junction compensation and high-end thermocouple amplifier circuit diagram

Published:2011/6/23 2:41:00 Author:Ecco | Keyword: Loop elimination, cold junction compensation , high-end , thermocouple amplifier | From:SeekIC

The loop elimination, cold junction compensation and high-end thermocouple amplifier circuit composed of ISO102 and INA101are shown as the chart, it has the fuctions of ground loop elimination, cold junction compensation and high-end off. This circuit uses the K thermocouple to test temperature in the field, the temperature signal is converted to voltage signal, amplified by instrumentation amplifier INA101 and sent to ISO102, isolated and amplified, output by ISO102. Resistor Rc is used to set the INA101's gain. The feature of circuit is that K thermocouple is connected to the ground of ISO102 secondary side, then it will form the same potential, thereby it eliminates the interference caused by ground loop.



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