Hello everyone, I'm going to make some experimental validations of a welding simulation and when it comes to the thermal field, i've found several signal amplifiers and junction compensation IC's on the literature. I would like to know your experience filtering the noise and acquiring accurate data.
additional information:
GMAW process, AISI 304 material. Thermocouple type R.
thanks in advance.
Basically, thermocouples type R have low sensitivity (10 µV/°C) and a typical exposed junction thermocouple with 32 AWG wire (0.25 mm diameter) will have a resistance of about 15 ohms / meter.
I’ve found an amplifier (LTK001A) and a cold junction compensator (LT1025) that supports thermocouple type R.
Based on their datasheets, I have a circuit proposal that you will find attached.
Your comments suggestions would be greatly appreciated.
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