Hi all, I have a small problem. I have a new thermistor and a new 
thermostat I am working on. The thermistor is paired with a standard 
thermometer. As I cycle the thermistor (between about 20 and 50 deg C) I 
can see it does not go back to the original value. Just how much is a 
new thermistor supposed to drift (in percent). It's a low cost unit but 
not that low. I have worked with thermistors before and this one seems 
way out of line. I see a 4% difference after a cycle from 20 to 50C, 
coming back to 20C, and it takes ages (~10 minutes ~) to return to the 
original value for the last 5 degrees (way more than the reference 
thermometer glued to it). That is enormous imho. I think that I have a 
faulty part, but I would like to know if someone has seen such problems. 
My circuit dissipates less than 1mW in the thermistor so that cannot be 
the reason.

tia,
Peter
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