>> Surely the AC errors if any must be associated with the A2 AC Convertor board - 03458-66502? >> Dave Why should this be a hardware error??? It's much much more probable, that this is a natural drift phenomenon. This is 'as found' and the 'as left' report is missing, that would tell the whole story. Anyhow, this can very probably be adjusted by the regular calibration process. Frank

On 16 January 2018 at 23:06, Dr. Frank <frank.stellmach@freenet.de> wrote: > Surely the AC errors if any must be associated with the A2 AC Convertor >>> board - 03458-66502? >> Dave >>> >> > Why should this be a hardware error??? > > It's much much more probable, that this is a natural drift phenomenon. > This is 'as found' and the 'as left' report is missing, that would tell the > whole story. > > Anyhow, this can very probably be adjusted by the regular calibration > process. > > Frank > But given that Keysight calibration includes adjustments free of charge, the fact it was not adjusted suggests that it can not be adjusted. The AC board 03458-66502 is obsolete, but the replacement (03458-66512) https://www.keysight.com/my/faces/partDetail.jspx?partNumber=03458-66512 is $2243.00with a $439 trade-in. So the AC board price is $1794, which is not inconsistent with a 2100 Euro repair bill. Dave

I think the only option for repair, out of warranty or out of repair agreement, is 'Per Incident' which the KS website lists as $2851.00. This is a 'one charge fits all' kind of repair price. It comes with a calibration as well. It's what makes the repair agreement attractive as 'insurance' on such an expensive instrument. Joe -----Original Message----- From: volt-nuts [mailto:volt-nuts-bounces@febo.com] On Behalf Of Dr. David Kirkby Sent: Tuesday, January 16, 2018 5:35 PM To: Discussion of precise voltage measurement Subject: Re: [volt-nuts] What's the probability of a random used 3458A passing a Keysight calibration? On 16 January 2018 at 23:06, Dr. Frank <frank.stellmach@freenet.de> wrote: > Surely the AC errors if any must be associated with the A2 AC > Convertor >>> board - 03458-66502? >> Dave >>> >> > Why should this be a hardware error??? > > It's much much more probable, that this is a natural drift phenomenon. > This is 'as found' and the 'as left' report is missing, that would > tell the whole story. > > Anyhow, this can very probably be adjusted by the regular calibration > process. > > Frank > But given that Keysight calibration includes adjustments free of charge, the fact it was not adjusted suggests that it can not be adjusted. The AC board 03458-66502 is obsolete, but the replacement (03458-66512) https://www.keysight.com/my/faces/partDetail.jspx?partNumber=03458-66512 is $2243.00with a $439 trade-in. So the AC board price is $1794, which is not inconsistent with a 2100 Euro repair bill. Dave _______________________________________________ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.