Thanks for answers.
Could you tell me an example of a isothermal block in practise? i found some info saying - isothermic connector made of copper. What is it? Big piece of copper? I think this principle is used in multimeter, because my TC is joined in one end.
I'm afraid that these specially designed amplifiers are way too expensive for me.
I'm interested in temperatures from 20-70C°, i am doing some experiments with the shape memory alloy springs and i need to know and keep their transformation temperature. So 8 bit's should be enough for these temperatures. I know that TC is non - linear, and i was wondering how it is compensated in the multimeter. But i was going to test TC in different temperatures and make a table for it's output's comparing to the temperature, so i make coeficients at 25C° to temperatures from 20 to 30 degrees, and so on, 2C° accuracy is ok for me now.
If i understand CJC right - we need to know the ambient temperature, and according to it we choose value for TC electric output from lookup table. But i've found a K type lookup table with data that seems to be absolute values from -200C to 1200C°. And i was thinking of using this, deciding the temperature directly from the lookup table, e.g. i have 1mV output, i look in table, and i see that it's 25C°. So i guess now this CJC effect is doing this for me?