[SI-LIST] Re: DC resistance measurement
- From: "Andrew Ingraham" <a.ingraham@xxxxxxxx>
- To: "si-list" <si-list@xxxxxxxxxxxxx>
- Date: Tue, 22 Aug 2006 21:38:45 -0400
Accurate DC resistance measurements sometimes require a "kelvin" or 4-lead
connection ... two leads to pass current through the device, and two
*separate* leads for measuring the resulting voltage drop. That way, I*R
voltage drop across the connection points, leads, etc. is negated.
Regards,
Andy
> Now, we are measure DC resistance of power plane in PCB. The presision
> should be 0.1 mohm at least. However, because of the clamp of the meter,
> the error is about 1m ohm. In another word, the difference between two
> measurement for the same DUT is about 1 mohm. Is there any advice about
> this topic? Anything will be help. In your measurement, how to connect the
> probe to the plane?
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