On 2 May 2018 at 18:27, Charles Steinmetz <[email protected]> wrote:
> Dave wrote: > > This has certainty got me thinking about what might be happening, although >> the fact Keysight have said they can't update the EEPROM, suggests they >> have the software to do it. >> > > Or does it mean they have lost the software to do it? Does the cal > certificate have "as received" and "as adjusted" error readings for other > ranges? If not, perhaps they adjusted nothing, which would leave open the > possibility that they simply cannot adjust these meters anymore due to lack > of software. > > Best regards, > > Charles I don't have a cal certificate - only a report of how it was received http://www.kirkbymicrowave.co.uk/tmp/Measurement_report_As_received_1-9957310275-1.pdf and an email saying it can't be updated. ================ Hi David, We’ve a High Resistance Meter for calibration, but the instrument is faulty. Model: 4339B Serial Number: JP1KD01746 Service Order: 1-9957310275 The calibration has failed, I’ve attached a copy of the calibration results. Automated adjustments were attempted. Source Voltage Adjustment could be completed ok, but the Ammeter Adjustment could not be completed. I’ve passed the instrument to our repair team who will investigate the fault, and arrange for a repair quote to be sent out. ================ The fact the source voltage could be adjusted suggests they could update the EEPROM, but I'm puzzled why the ammeter adjustment could not be completed. I'm not sure if they have updated the source voltage at this point. Every voltage is low, but all are in spec. I'd hope they would be able to increase the output voltage a little there. For what it is worth, here's the cal certificate of one I sent in a month or so ago. http://www.kirkbymicrowave.co.uk/tmp/1-9690444179-1-combined-file.pdf I was told that one needs a new CPU. I might have some more information tomorrow, as Keysight (UK) are contacting the USA for support. Dave _______________________________________________ volt-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.
