Products > Test Equipment
Repair of a Vintage Simpson 461-2 DMM
xrunner:
Waiting on parts again, I thought I'd try to clean up the case. I ran into a problem. It looks like it has specks of paint on it. I've tried all these cleaners -
Alcohol
Simple Green
Paint thinner
Soap and water
Orange degreaser
I can't get rid of the specks.
Any ideas?
lowimpedance:
Must be some difficult 'Sh!t' to remove if none of what you tried made any impression at all!!.
what about ;
WD40, kerosine, mineral turps. Best to try a small spot first if the case is plastic.
Cant say if you will have any luck with those either, so maybe just live with the specks.
You should be looking at the display not the case anyway :P.
If you do get it off post back the magic liquid that did it.
Seems you have a bit of a thing for old multimeters !.
You know the HP3435a had a touch hold probe assembly similar to the Fluke 80T-H which is used with the 8010, 12 and 50 series.
The 34112a, (the small hole between the V/ohm and COM terminals is for this probe!).
If you want to add to your collection of oldies see if you can get a HP3476a/b, (that's one odd looking beast!).
robrenz:
--- Quote from: xrunner on February 18, 2015, 11:40:40 pm ---Waiting on parts again, I thought I'd try to clean up the case. I ran into a problem. It looks like it has specks of paint on it. I've tried all these cleaners -
Alcohol
Simple Green
Paint thinner
Soap and water
Orange degreaser
I can't get rid of the specks.
Any ideas?
--- End quote ---
Use a magic sponge with any of the cleaners above. It may take quite a bit of rubbing and I would be very careful on the printed info as it may take the print off also. You may also see if the individual specks will pop off with a soft plastic scraper.
It looks a lot like house fly crap which is fairly hard to get off also.
Excavatoree:
I've had good luck with "goop" brand hand cleaner, but sometimes it works very slowly. Apply, let set, wait, rub, wait, apply more, wait, rinse off, evaluate, apply more, rub, wait, apply more, and on and on
cosmicray:
--- Quote from: xrunner on February 18, 2015, 11:40:40 pm ---I can't get rid of the specks.
Any ideas?
--- End quote ---
Can you scrape any of them with a fingernail ? Alternate idea would be an old toothbrush with a bit of toothpaste. Toothpaste, depending on the brand, is a mild abrasive. Might try the baking soda and peroxide kind.
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