Slow is not a problem in our applications the loop takes care of that. Will look in to PT 100. Bert Kehren In a message dated 7/21/2014 8:19:48 A.M. Eastern Daylight Time, [email protected] writes:
NTC are not that very stable, they are amorphous material winch could recrystallize slowly and therefore change it's electrical behavior , PT100 style is more reliable since it is pure metal 73 Alex On 7/21/2014 1:22 AM, Attila Kinali wrote: > On Sun, 20 Jul 2014 23:18:38 -0700 > "Tom Van Baak" <[email protected]> wrote: > >> To satisfy my curiosity and get actual data I'd like to place 6 or more >> tiny analog high-resolution temperature sensors all around the OCXO of a >> Trimble Thunderbolt. That's high-resolution both in temperature and in time. >> In other words, no fake accuracy "averaging" allowed. The goal is to observe >> thermal gradients in real-time and see how good, or how bad, the correlation >> is among crystal temperature, case temperature, and DS1620 temperature >> sensor (which is mounted a considerable distance from the OCXO). The same >> technique, and maybe even the same conclusions, might apply to Rb. > May i ask what speaks about using PT100/PT1000 or NTCs? > > NTCs are dirt cheap, but might need some calibration first, to > get to time-nuts standards. But PT100 aren't that much more expensive > either. > > eg: > The NTCALUG03 by Vishay don't look too bad, or if you want PT100 > the M310 by Heraeus. The KN1510 by Heraeus look also nice, but are > a tad bit more expensive (about 20USD/pcs) > > > Attila Kinali > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
