Thank all the people have reply so prompt and sorry for my late reply.
I currently work for a coffee machine company and they asked me to create a test bench to make it easier to test all its components on other machines of the same model.
There is a boiler inside the coffee machine and it has a thermocouple which indicates the internal temperature of the boiler, ~ 90 ° C.
The CPU, (built by my company), reads these values. And if it doesn't get these values, I can't simulate the pressure of the coffee machine and so on.
Doing some measurements I found that the thermocouple, at this particular temperature above, produces 2.7 ° mV at the output (not 3.7 ° mV, sorry).
The best option would be to create something that helps me adjust the range from 0 to 5 mV as I want, so that I can test the various conditions of the motherboards if the temperature is too high or low.
Thanks in advance,
Hope the above can help you understand better.
I would like it to have accuracy of 0.1 mV (if possible), isn't it?