Do we know what this “Long Term Aging Process” is or is it proprietary?
On Sat, Sep 26, 2020 at 5:03 PM Bruce Griffiths <[email protected]> wrote: > Drift ~1-2mK per year for suitably conditioned thermistors at 25C: > > > https://www.littelfuse.com/technical-resources/technical-centers/temperature-sensors/thermistor-info/thermistor-terminology/stability.aspx > > > > Bruce > > > On 27 September 2020 at 11:15 Bob kb8tq <[email protected]> wrote: > > > > > > > > > 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. > > > > _______________________________________________ > > 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. > > -- Jeremy Nichols Sent from my iPad 6. _______________________________________________ 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.
