Frank, The sticker was from the cal lab, as a reminder I guess. I have firmware 9.2 (from the calram download software) but you said the latest is 9.1? I forgot to take a picture of the EPROM chips' labels inside the unit and I closed it back up now... There were six chips.
I may put the RAM chips just because, since I will have the board out and there are sockets already. It looks like the unit was indeed manufactured in 2009 and the NV-RAM chips are OEM, so it is fairly recent. Didier On Sat, Oct 26, 2019 at 6:57 PM Frank Stellmach <[email protected]> wrote: > Didier, > > it's quite unusual to have battery stickers on the back - maybe somebody > already had replaced these. > > Btw, KS would probably replace the complete board (for a fortune) by the > SnapHat version, as they don't replace the DALLAS chips any more. > > As you have the old board, yes, only the 2kB / small DALLAS nvSRAM > contains the calibration data, the 2x 32kB contains setup / STATE, > procedures, BASIC programs, and alike, so their content does not have to > be restored. Only if you have programmed something, like the short cut > keys F1 .. F9, you would have to re-program that afterwards, but > directly over the GPIB. > > The 4 empty sockets are for 4x32kB volatile RAMs (62256 type) which > stores / buffers measurement data, that's not intended for additional > firmware. > KS demands about 500$ for an upgrade, and 30 years ago, on my first > 3458A, I already upgraded this option 01 for a few bucks (about 4 x 5$/€ > today). > > You should also update the firmware to the latest version 8.1 or 9.1, as > older versions have several bugs. > > Therefore, check the EPROM(s), if you have six 64kB of them, or only > one 512kB. > For both versions, FW images are available. > > Frank > > > _______________________________________________ > 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.
