Ron:
I have been buiding this circuit in my office where camera is not allowed.Basic idea is to find the resistance of a welded joint.I pass a known current to the welded joint and measure the voltage drop across it.Depending upon the value of the resistance ( typical 10~14 mΩ for my application) voltage drop will vary.I need to amplify the milllivolts getting across the welded joints to the gain of 1000 so that I can get Vout of 0~10 Volts( since I am getting in millivolts,my PLC input is 0~10Volts amplification is must with accuracy and linearity).
These type of applications are working in my office in more numbers but all of them are supplied by my suppliers.
I have been buiding this circuit in my office where camera is not allowed.Basic idea is to find the resistance of a welded joint.I pass a known current to the welded joint and measure the voltage drop across it.Depending upon the value of the resistance ( typical 10~14 mΩ for my application) voltage drop will vary.I need to amplify the milllivolts getting across the welded joints to the gain of 1000 so that I can get Vout of 0~10 Volts( since I am getting in millivolts,my PLC input is 0~10Volts amplification is must with accuracy and linearity).
These type of applications are working in my office in more numbers but all of them are supplied by my suppliers.
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