[volt-nuts] How accurate is a fluke after 9 years

[Tom Knox]

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 at gmail.com
> Date: Fri, 15 May 2015 15:17:19 -0400
> To: info at electronicsandbooks.com; electronicsandbooks at yahoo.com; volt-nuts at 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 at 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
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