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.
