Products > Test Equipment
Repair of a Fluke 87 lll
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Qmavam:
Hi,
  I have a Fluke 87 lll that had over voltage AC applied.
I checked all the MOVs and they seem fine.
 Any experience fixing an 87 lll that had too much voltage applied?
 What should I look at?
                   Thanks, Mikek
BeBuLamar:
What does it do now? It doesn't power up? Overvotage AC applied how high was the voltage and in which mode the meter was in?
Fungus:

--- Quote from: Qmavam on June 05, 2023, 12:12:57 pm ---Any experience fixing an 87 lll that had too much voltage applied?

--- End quote ---

How much is "too much"?


--- Quote from: Qmavam on June 05, 2023, 12:12:57 pm ---What should I look at?

--- End quote ---

If it powers on and responds then try removing the two clamping transistors to see what happens.
BeBuLamar:
The company I work for had a number of 87III and they tend to have problem with the display. None had any other problems.
Ugur:
Turn it into Ohms and do you see OL on the screen? If not, check the varistors.
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