[volt-nuts] How accurate is a fluke after 9 years
tmicallef at gmail.com
Fri May 15 15:17:19 EDT 2015
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?
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> 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.
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