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Design of Pt100 thermistor calibration module

2020-12-06 11:08:15 Procedural ape without hair loss

I shared with you about PT100 Of The corresponding table of thermal resistance temperature resistance and How to use Excel Accurate analysis of tables PT100 Temperature resistance relationship .

This blog shares a PT100 Calibration circuit , Hope to help friends in need .

It's caused by , Prepare to use PT100 Thermal resistance , Make one that can be tested -40℃~230℃ Module , Need to use resistance calibration , The calculation shows that 84Ω near -40℃,187Ω near 230℃, The required resistor can meet the calibration requirements .

  For this purpose, a simple calibration module is made , The output can be selected using the switch 84Ω perhaps 187Ω resistance , To achieve calibration .

The schematic effect is as follows :

PCB The effect is as follows :

  The calibration circuit can be concerned with the official account of WeChat , Reply key :PT100 Calibration module , Access to resources ~

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