Hi Roughly speaking 99.99999% of all OCXO’s use thermistors as temperature sensors. The normal evaluation process on a new one *probably* would catch something < 0.01C over a few months. You may do it a couple different ways depending on the target OCXO. The net result is still in the “golly gee wiz low” sort of range. If you can detect a drift / shift, you disqualify that part and move on to another one. Very few glass bead parts seem to get tossed out …..
Bob > On Sep 26, 2020, at 4:23 PM, John Ponsonby <[email protected]> wrote: > > Have any time-nuts got any data on the long term stability or drift > rates/ageing characteristics of thermistors? I am concerned with ability of > holding temperature constant at the milliK level for years. I reckon that if > one can measure it one can control it. Conversely if one can't measure it, > because of the instability of the sensor, one can't control it. > John Ponsonby > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
