On Tue, 30 Jul 2019 at 00:00, Miguel Yepes <[email protected]> wrote:
> No idea what are you talking about my meter is branded Agilent and by the > looks of it is one of the lastest ones, I need to check the serial to know > for sure. Oh, my error. I thought the photograph you emailed me said HP. A bad memory on my part. it would appear that the latest engineering change to yours was 2005, so 14 years old. I have no idea if there are engineering changes since then. Dave. > > > ________________________________ > From: volt-nuts <[email protected]> on behalf of Dr. David > Kirkby <[email protected]> > Sent: Monday, July 29, 2019 4:37 PM > To: Discussion of precise voltage measurement <[email protected]> > Subject: Re: [volt-nuts] Just got an Agilent 3458A > > On Mon, 29 Jul 2019 at 22:13, Miguel Yepes <[email protected]> wrote: > > > I was told this meter has not been repaired. It is in like new condition. > > It was bought for one job a few years back and them stored for over 2 > years. > > > > It must have been bought second-hand if bought a few years back. Agilent > was split off from HP in 1999. So whilst 1999 is not the latest year a > meter could be badged HP, and still sold by Agilent, it would probably be > 2001 - not all labels were changed overnight. I believe there was a period > of a couple of years, where something could be badged HP, but still sold by > Agilent. So that puts it at least 18 years old. > > There is a rule, > > https://www.eevblog.com/forum/testgear/agilent-hp-serial-number-confusion/ > > which I don't know if it's 100% reliable, that the year of the last design > change is 1960 + the first two digits of the serial number (MY45044988). If > that was so, the last design change was 1960 + 45 = 2005. But if the design > was changed in 2005, that would have been 6 years after HP was split off > into Agilent, so it would be badged Agilent, not HP. > > I suspect that the meter is made from at least two meters, which seems to > be quite common on 3458As. > > Dr David Kirkby Ph.D C.Eng MIET > Kirkby Microwave Ltd > Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, > Essex, CM3 6DT, United Kingdom. > Registered in England and Wales as company number 08914892 > https://www.kirkbymicrowave.co.uk/ > Tel 01621-680100 / +44 1621-680100 > _______________________________________________ > 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. > -- Dr. David Kirkby, _______________________________________________ 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.
