XTR112 114 thermocouple measuring circuit diagram of a loop

  
As shown, the OPA277 constitute inverting amplifier, inverting amplifier use high input impedance characteristics can be reduced and the loop thermocouple offset drift. 50 pote
XTR112 114 thermocouple measuring circuit diagram of a loop - schematic

ntiometer for calibration, adjustable-inverting input of the amplifier bias so that J-type thermocouple in the operating temperature range corresponding to the output current 4 ~ 20mA.




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