Products > Test Equipment
Old Fluke Multimeters
ModemHead:
Thanks @drtaylor for sharing that information!
rsjsouza:
+1. Thanks for the information. It is really nice to see the developer's inside scoop... :)
retiredcaps:
--- Quote from: drtaylor on December 17, 2015, 06:00:02 pm ---Regarding the PTC. The original part was made by a company no longer in existence.
BTW, the overload protection in the ohms range is rated to 300V, not 1000V. This is due to the breakdown rating of the PTC. So a cheap alternative that will not compromise performance is the Epcos B59885C0120A070. This is a PTC rated at 500V. These are in stock at DigiKey.
--- End quote ---
In my research over the last couple of years, the only PTC that is rated at 1000V and 1.1k ohm is the YS4020.
http://www.cdiweb.com/datasheets/ge_thermometrics/ys4019.pdf
Unfortunately, no one stocks it.
rrinker:
Great thread to run across. I have an 8012A that I snagged on a dumpster dive some 10 years ago. Currently my only bench dmm, and it gets used regularly. So far no troubles but I suppose it's only a matter of time before some capacitors call it quits.
--Randy
billfernandez:
Greetings all. It's wonderful to find this thread. I bought a Fluke 8060A in 1983 when I was working on the Macintosh at Apple. IT was expensive, but I wanted a really good meter that would last a long time, and it has! It's been a real workhorse, and as far as I know still works perfectly (though I've learned from this thread that it would be prudent to replace some caps).
I just recently bought a modern meter (Extech EX540) to replace it, but I still like my 8060A better -- and have always appreciated and benefited from the fast continuity response! The Extech sucks at this simple function.
I used to work at Siliconix (a now defunct semiconductor manufacturer) and when there I learned that we were making a custom chip (I think a hybrid analog/digital A/D converter) for Fluke meters. I had thought they were for the 8060, but I guess not. DRTaylor, do you have any recollection of what I'm talking about?
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