Thread: Question What ohm-age should they be?
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Old Dec 09, 2012, 07:26 AM
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Jack
USA, ME, Ellsworth
Joined May 2008
18,098 Posts
Quote:
Originally Posted by Odysis View Post
A multimeter is really only good for 0.1ohm, and even then not all. My $5 cheapy measures a dead short as 0.6ohms!

A milliohmmeter is a special device, capable of measuring down around 0.001ohms.

Good to hear you found the issue with one, hopefully the rest are just as easy.
But it is better than nothing for checking motors.

I use a non-RMS old Fluke (79-II?) and it will do the same thing (showing the resistance in the test leads) but that can be a good thing. I see the 0.6 between the leads, then check a winding and it should be about the same, maybe a little higher. And if the readings are not the same and steady you can spot a bad or intermittent connection.

I can zero on the leads also and it will give me a 0.0 on shorted leads.

Jack
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