Author Topic: Fluke 87 III Over Load indication. (Read 1581 times)

firewalker · « **on:** July 02, 2018, 03:57:51 pm »

Some time my Fluke 87 III displays an Over-Load on volts scale without anything connected. A simple tap on the rotary switch is enough to fix it. Bad contacts?

Alexander.

Fungus · « **Reply #1 on:** July 02, 2018, 09:00:14 pm »

Certainly sounds like it.

Pull it apart and rub them with spit, that usually does the trick.

retiredcaps · « **Reply #2 on:** July 02, 2018, 09:57:57 pm »

See

http://mrmodemhead.com/blog/fluke-83-iii-rotary-switch/

"It basically works and seems to be calibrated correctly, but occasionally when set to measure Ohms, the display will flicker a bit and only display “OL”, regardless of whether the leads are connected to anything, or even shorted together. A slight tap on the rotary switch will cause it to start working correctly again. Odds are, there’s a minor problem with the internal switch contacts."

mzacharias · « **Reply #3 on:** July 04, 2018, 12:56:48 pm »

DeOxit D-100L. Apply directly to switch contacts. Do not use a spray cleaner.

Fungus · « **Reply #4 on:** July 04, 2018, 01:45:24 pm »

I refer you to time 12m02s in this video:


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Author Topic: Fluke 87 III Over Load indication. (Read 1581 times)

firewalker

Fluke 87 III Over Load indication.

Fungus

Re: Fluke 87 III Over Load indication.

retiredcaps

Re: Fluke 87 III Over Load indication.

mzacharias

Re: Fluke 87 III Over Load indication.

Fungus

Re: Fluke 87 III Over Load indication.

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