Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
tggzzz:
--- Quote from: med6753 on May 12, 2018, 12:01:36 pm ---The A5 board: This is a 2465. The EAROM chip in the Buffer (Option) board in my 2465 DMS does take intermittent checksum errors so there seems to be some truth in that rumor.
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At what point in the operation is that error visible? Power up, after 5mins inactivity which IIRC causes a write to the EAROM, etc?
Specmaster:
--- Quote from: med6753 on May 12, 2018, 12:01:36 pm ---mnem, those 2 parts are exactly what I need. :-+ You still have my snail mail address, right? Isn't great when a fellow TEA'er can help each other with their addiction? :-DD Hopefully I can return the favor one day. :-/O
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Totally agree and I think it goes on a lot, sometimes in the background rather then publicly as well, I know that from personal experience :-+
med6753:
--- Quote from: tggzzz on May 12, 2018, 12:09:59 pm ---
--- Quote from: med6753 on May 12, 2018, 12:01:36 pm ---The A5 board: This is a 2465. The EAROM chip in the Buffer (Option) board in my 2465 DMS does take intermittent checksum errors so there seems to be some truth in that rumor.
--- End quote ---
At what point in the operation is that error visible? Power up, after 5mins inactivity which IIRC causes a write to the EAROM, etc?
--- End quote ---
It takes a "Buffer Board Checksum Error" on initial power up when it goes thru the self tests. It clears and the scope appears to operate normally. That EAROM stores the cal data for the DMM option and the Counter/Trigger option only. It does not affect the mainframe. Despite that checksum error I have been able to calibrate the DMM and the Counter and they appear to operate OK.
med6753:
In between fixing the 465 and this new 2465 I was able to complete the power supply modification to the Fluke 8000A DMM. It now has a regulated 5V supply built up and installed. It's kind of a bodge but it does work and it is secure and safe. Just to the left of the new board are the 7815 and 7915 regulators for the +/- 15V supplies. I've had it on for several hours now and the measurement drift for all practical purposes is gone. All that's left is final check of calibration and it's a wrap.
AF6LJ:
Good deal, and a well executed mod.
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