Mine is also B15 /A02
'KEITHLEY INSTRUMENTS INC.,MODEL 2015,104xxxx,B15 /A02 \n'
Btw:
I just read a warning aimed at someone , wanting to upgrade a 2000 (same measurement engine) , it was mentioned that the CAL values would be lost , after an upgrade
My meter came (from KJDS) with a May-2011 Cal , and i'd hate to loose that.
/Bingo
That would be me
, I own two working and one work in progress 2000's.
One of my (now) working 2000's was originally faulty. It would power up , but hang. After lots of messing around I determined that the firmware didn't like what was in the i2c eeprom.
A few more diagnostics and I had changed a few parts of the i2c enough that the meter worked okay.
So - I asked Keithley if there were any bugs which might have caused this (the meter had very early firmware). Well they had no reports of any such events - but did suggest my firmware was very old - and I should send it in to be upgraded. Well the meter cost me 100ukp - and I had blanks and a cat like curiosity - so they made the firmware available on the Keithley support forums - yes that was my doing. Unfortunately when I changed the firmware - all calibration was lost and I had to re-calibrate.
So that was the reason for my big fat warning - the format of your i2c from your old firmware may not be compatible with your new firmware ( and certainly some firmware has different calibration requirements ). The only sensible things for the firmware to do would either wipe the data and require recal - or convert the data - with the proviso it might not be as accurate as previously due to missing data for new calibration methods.
Here is the link indicating calibration methods change
http://forum.keithley.com/phpBB3/viewtopic.php?f=32&t=59520&sid=67a7e8d133d86195a0a2ef443100dbe7And here the discussion on the eeprom issue which led to this.
K2000 eeprom problem
http://forum.keithley.com/phpBB3/viewtopic.php?f=32&t=6600&sid=67a7e8d133d86195a0a2ef443100dbe7