3 ms·
Hmmh? Some confusion of terms perhaps. You can expose a RTD or even NTC (to bring the point home) to the temperature in question, then measure the resistance i
by guenthert 4y ago
Hmmh? Some confusion of terms perhaps. You can expose a RTD or even NTC (to bring the point home) to the temperature in question, then measure the resistance in a bridge with nearly arbitrarily high resolution. Tadah! Temperature measurement with nK resolution. Of course it doesn't say anything about precision, much less about accuracy nor as you pointed out "The Temperature".
- twawaaay 4y agoTheory is closer to practice in theory than in practice. PT100 is 0,4 Ohm/K. Or 0.0000000004Ohm/nK. This means, at 100Ohm, you are measuring 4 parts per (american) trillion for that nK. Good Luck and please, report how many of those digits were pure noise!
- airbreather 4y agoInstrumentation engineer here, but RTD is not linear? Near linear but usually even for industrial use there is a three term polynomial correction applied. There's a whole standard devoted to the subject, DIN/IEC 60751. Useful reference from TI : https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.ti.com/lit/pdf/snoaa67&ved=2ahUKEwjDuJqAvLf4AhW71DgGHQXQDk0QFnoECAsQAQ&usg=AOvVaw0CcxqxgXS48uFHNQ15W_Zr https://www.google.com/url?sa=t&source=web&rct=j&url=https:/...
- twawaaay 4y agoYeah, it is nonlinear and I did apply three term ploynomial correction as per manufacturers spec sheet.