Todd and Bill, Thanks for the input. The 3.6 K thermistor reading seems viable and i will pursue it further.
I may have over committed myself to modifying the HP-419A, the Fluke 845A, buying the 3458A and looking at buying a Fluke 732A. So much to do and so little time. Thanks again, Randy On Sun, Aug 17, 2014 at 11:48 AM, Bill Gold <[email protected]> wrote: > Randy: > > I have 6 ea Fluke 732A instruments. The results of being an over the > edge and deeply obsessed "Volt Nut", they just kept adding (reproducing?) > over the years. My readings for the themistors range from 3.407K OHMS to > 4.514K OHMS and all work just fine. 3.6K OHMS would seem just fine to me. > It really depends upon the final inside temp of the oven assembly. The one > with 3.407K OHMS measures around 47.5 degrees C while the others are around > 45 C. It is the stability of this reading over time that is very > important. > Fluke says that it could change as much as 10 ohms per month but mine are > rock solid for years and years. > > Bill > > ----- Original Message ----- > From: "Randy Evans" <[email protected]> > To: <[email protected]> > Sent: Sunday, August 17, 2014 11:08 AM > Subject: [volt-nuts] Fluke 732A themistor reading > > > > Can anyone tell me what value to expect for a Fluke 732A thermistor > > reading? I am looking to get a used 732A and one of the things I was > told > > to look for is to measure the thermistor reading after the unit has > heated > > up for at least an hour. I saw in one of the posts that a "typical" > > reading was 4950 ohms. One vendor I asked said he measured about 3600 > ohms > > after a two hour warmup. I was concerned that this is too low. What do > you > > guys think? > > > > Thanks, > > > > Randy > > _______________________________________________ > > volt-nuts mailing list -- [email protected] > > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > and follow the instructions there. > > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there. > _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
