What would happen if resistance was allowed to stabilise at 65C before the next step down in temperature?As far as i understood the most of the drift happens in the first 30 minutes at high temperature ... sub sequential thermal cycle cause drift but this became less evident cycle by cycle.
Need to do another experiment with long resting times. Something like this should be appropriate:
- 30 minutes at 25°
- 30 minutes at 30°
- 6 hours at 65°
- 12 hours at 30°
Up to now I have measured this things:
1. when the temperature is stabilised after a temperature change there is always some drift
2. this "drift" is proportional the the dt
3. drift is negative when temperature dt is positive (and viceversa)
4. when temperature goes back to "ambient temperature" this drift is still there and measurable
5. resistor with lower TC generally drift lesser than the ones with higher TC
6. most of the drift is recovered (or it drift back) after many hours of resting at "ambient temperature"
7. this drift effect reduces much with many therm cycles
Points 6 and 7 are known facts and observable in data but I still need to confirm with appropriate experiment that is not a multimeter drift or some changes in the measurement methods I made in last days (changed leads and probes from cheap mini grabber to Pomona golden plated ones).