The Fluke 5700A and 5720A as well as the Wavetek 4808 and 4800A are pretty amazing I have seen several that appear to have been abused for years without a Cal and are still spot on. Same with many of the HP and Agilent 3458A's. It seems I see more broken then out of spec. Thomas Knox
> From: [email protected] > Date: Fri, 15 May 2015 15:17:19 -0400 > To: [email protected]; [email protected]; > [email protected] > Subject: Re: [volt-nuts] How accurate is a fluke after 9 years > > Frans, > > Do you perform an in-house calibration with a 10V reference and 1 ohm & 10k > resistors? I have been studying the recommended calibration intervals of > Fluke's 57xx series calibrators and I wonder how well the unit maintains its > stability over long intervals between trips to a cal lab. > > Also, if you don't mind, would you give a ballpark figure for the cost of cal > from your cal lab? > > Todd > > Sent from my iPad > > > On May 15, 2015, at 14:50, Electronics and Books via volt-nuts > > <[email protected]> wrote: > > > > My Fluke 5700A calibrator was calibrated today after 9 years. It displays > > how much it deviated from the last calibration. For the both voltage > > references i got 0.0 ppm and for the internal 10k resistor -1.7 ppm. > > Only the amplifier for the 11-22 volt range drifted 1700 ppm for it depends > > on a voltage divider composed of two normal metalfilm resistors. These will > > be replaced by 2 vishay 0.01% resistors which are hopefully more stable. > > > > Regards > > > > Frans > > > > > > > > Discere ne cesses > > _______________________________________________ > > 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.
