I do have an ESI SR1 10Kohm standard, but I'm not sure its accurate enough.......time to look around I suppose.
BTW, I understand that TV twin lead, the copper wire type, makes a good test lead for the 3458 measurements. It seems reasonable, although the leakage resistance might be questionable. Randy On Sun, Aug 17, 2014 at 1:36 PM, Todd Micallef <[email protected]> wrote: > Randy, > > Next thing you know, you will be looking at a 10K standard resistor to go > with that 3458A and possible 732A. > > Todd > > > On Sun, Aug 17, 2014 at 3:51 PM, Randy Evans <[email protected]> > wrote: > > > 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. > > > _______________________________________________ > 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.
