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Can you test a capacitor?

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Old 10 November 2011, 02:18 PM
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alcazar
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Default Can you test a capacitor?

The big one, on my lathe? Without just replacing it?
Old 10 November 2011, 03:47 PM
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Leslie
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First thing is that that it should not be internally shorted-ie it must not pass DC. Obviously it has to be disconnected from its circuitry as you test it.

If it does not, and does not look damaged, it should be ok.

You could also check by charging it up and then seeing if it holds current when you remove the charging current.

Les
Old 10 November 2011, 04:24 PM
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andy97
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Yes you can test most large type capacitors. You will need a capacitance meter or an meter that can read inductive resistance with a high frequency generator. But saying that, by the time you have acquired a meter you might of well bought a replacement capacitor!
Old 10 November 2011, 04:33 PM
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zip106
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Should you be playing about with a fast, spinny thing in your condition?

Old 10 November 2011, 04:42 PM
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Stick your tongue on it, if your eyes light up then it is working fine
Old 10 November 2011, 08:26 PM
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alcazar
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LOL, the stupid thing gave me a right belt up my left arm five years ago when I disconnected it to get the motor re-wound
Old 11 November 2011, 03:13 PM
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Leslie
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Well you could try that again then!

Les
Old 11 November 2011, 04:34 PM
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What? With MY heart?
Old 11 November 2011, 04:36 PM
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zip106
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Originally Posted by alcazar
What? With MY heart?
It'd keep it going a bit longer
Old 12 November 2011, 12:07 PM
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Leslie
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Originally Posted by alcazar
What? With MY heart?
Yes all understood of course.

Try to con someone else to hold the connecting wire while you disconnect it.

Les
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