I use my 731B for both 10v standard, and to dial in microvolts. Since I'm always switching the unit, does anyone know if it would be a good idea to treat the contacts with Deoxit Gold?
On Sat, Mar 21, 2015 at 7:54 PM, Bill Gold <[email protected]> wrote: > Richard: > > I have one 731B that I have had for 15 or more years. I have only been > plotting drift for the last 10 years. This was done against a bank of four > 732A references. The maximum drift that I have observed is about -1.5 ppm > over that 10 year period. This is as best as I can determine without > having > a Josephson Junction Array. During the first 5 years of that period it > seemed to drift around +0.4 ppm total, but then in December 2010 I moved to > a new home and at that time it seems to have a -1.5ppm total drift over the > next 5 years. Not too sure why. So as far as yearly drift I guess you > could say that it averages around -0.15 ppm per year over that 10 year > period. As far as temperature dependence, all of this is over a range of > 20C to 24C depending upon the temperature of the room. I cannot separate > the temp variations from the DC noise but just a casual look at the chart > for the past 6 years it seems to indicate that this 731B output goes down > with a higher room temp and vice versa but less than 0.4 ppm total over > that > range of temps. > > Does this one beat specs, you bet! Others may not be this good > however. > > Bill > > ----- Original Message ----- > From: "Richard Moore" <[email protected]> > To: <[email protected]> > Sent: Saturday, March 21, 2015 1:02 PM > Subject: [volt-nuts] Fluke 731B > > > > Hi all — realisitcally, what sort of stability can be expected from a > fully functional 731B regarding variation in ambient temp a few degrees C > around 23, and for long-term drift? > > > > Fluke’s specs are very conservative, and I think the 731 is far better > than the specs would lead you to believe, but I have no practical > experience > with these units. > > _______________________________________________ > > 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.
