Seeking Feedback - How often have you used a Low Resistance Micro-Ohmmeter?

If you have the time, I'd appreciate if you voted in this poll. I'd like to get a sense of your need and use of low resistance micro-ohmmeters. Thanks.

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kmikemoo over 2 years ago in reply to rscasny +4

rscasny Younger me used to use them to measure contact resistance on high voltage switchgear (aka circuit breakers) and transfer switches. Older me uses it to measure rotor and stator winding resistance…
shabaz over 2 years ago +4

I can imagine them being extremely handy for measuring electrical contacts, such as relays to examine if they are failing, or for checking the resistance quality of shielding or grounding between different…
shabaz over 2 years ago in reply to beacon_dave +4

Interesting use! Maybe the inductance may be an issue, although some meters may be more stable than others. Presumably the industrial meters are more immune to that. Also, some meters may use a slow…

anniel747 over 2 years ago

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rscasny over 2 years ago in reply to anniel747

Curious: could you give an example of how you use it, if it's not classified or anything like that.
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dougw over 2 years ago

I used one when I had access to one - to find shorts.
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baldengineer over 2 years ago

I don't know what one is, but now I want to know.
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kmikemoo over 2 years ago in reply to rscasny

rscasny Younger me used to use them to measure contact resistance on high voltage switchgear (aka circuit breakers) and transfer switches. Older me uses it to measure rotor and stator winding resistance in motors and generators. Anything with single or fractional digit resistance can't really be measured accurately with the Fluke.
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misaz over 2 years ago

never because I do not have any, but sometime I would like to have one for testing current sensing resistors and evaluating resistance of wires.
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anniel747 over 2 years ago in reply to rscasny

High power relay contacts evaluation.
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shabaz over 2 years ago

I can imagine them being extremely handy for measuring electrical contacts, such as relays to examine if they are failing, or for checking the resistance quality of shielding or grounding between different parts of a system or enclosure perhaps!

I don't have a micro-ohmmeter, but do have a couple of milli-ohmmeters (one commercial one, and one that was a DIY project Building Frank's Milliohm Meter that is pretty accurate (and that one has the characteristic that it doesn't pass high current through the device under test [for some applications that's a very useful property, although other applications may not require that]); it can even be used to measure MOSFET on resistance.
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anniel747 over 2 years ago in reply to shabaz

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shabaz over 2 years ago in reply to anniel747

That's correct for shielding, I specifically mentioned just checking "resistance quality" (i.e. a maintenance operation) some may miss that! : )
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