For those interested in calibration/adjustment of the Solartron 7081, I am doing that.
> Gesendet: Montag, 01. Juli 2019 um 19:07 Uhr > Von: "m k" <[email protected]> > An: "'Discussion of precise voltage measurement'" <[email protected]> > Betreff: Re: [volt-nuts] What are the best of the low(ish) cost 8.5 digit > multimeters? > > I know one of the Transmille employees in the UK, I suspect they would be > happy to calibrate other brands, I suggest giving them a call. > > ________________________________ > From: volt-nuts <[email protected]> on behalf of David C. > Partridge <[email protected]> > Sent: 01 July 2019 02:28 > To: 'Discussion of precise voltage measurement' > Subject: Re: [volt-nuts] What are the best of the low(ish) cost 8.5 digit > multimeters? > > Sad to say that Ametek no longer provide any support for the 7081. They also > scrapped the Commodore PETs they had with the calibration software for the > 7071 and 7081 (I so wish I could have acquired one of those). > > The huge "elephant in the room" problem is finding a calibration lab with an > error budget that's actually good enough to calibrate *any* 8.5 digit meter. > More like than not (barring faults) your meter will probably be more accurate > and stable than any of their calibration equipment. I don't know of any in > the UK apart from Fluke and Keysight (I would love to hear that there are > others). Keysight UK can't do the top spec calibration on a 3458A (so > called Loveland calibration) so if you want that, AFAIK it has be return > shipped to California, USA (though I've heard that Germany *may* have a > Josephson junction setup). Of course it's not under power for that time and > you risk destruction of the custom VFDs ... > > I suspect that my Datron 4808 is as good as or better than most cal labs in > the UK (though there must be some with at least one calibrated Fluke > 5700A/5720A/5730A or Datron 4808 or similar). > > PS Transmille produce an 8ppm calibrator (4010) and a 4/9ppm meter (8100) so > could probably do the job, but whether they'd do "other brand" calibration ? > > David > > -----Original Message----- > From: volt-nuts [mailto:[email protected]] On Behalf Of J. L. > Trantham > Sent: 01 July 2019 01:21 > To: 'Discussion of precise voltage measurement' > Subject: Re: [volt-nuts] What are the best of the low(ish) cost 8.5 digit > multimeters? > > David, > > Have you considered the Solartron/Ametek 7081? > > If I'm not mistaken, you posted some images of their EPROM's several years > ago. > > It's slow sampling at 8.5 digit resolution but seems user friendly and, at > least several years ago, was able to be calibrated by Ametek in England. I > sent two over there for calibration. > > Good luck. > > Joe > > > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ > volt-nuts mailing list -- [email protected] > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/volt-nuts_lists.febo.com and follow the instructions there.
