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

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 <volt-nuts@febo.com> 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 -- volt-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there.

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: tmicallef@gmail.com > Date: Fri, 15 May 2015 15:17:19 -0400 > To: info@electronicsandbooks.com; electronicsandbooks@yahoo.com; volt-nuts@febo.com > 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 <volt-nuts@febo.com> 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 -- volt-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > > and follow the instructions there. > _______________________________________________ > volt-nuts mailing list -- volt-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts > and follow the instructions there.