William Couture wrote:
> Could someone kindly describe what is being measured and how this
> works?  I'm not have much luck with Gargoyle...
> 
> Thanks!
>    Bill
> 

I have not heard of that but maybe you mean four wire measurement?

If so, it is a method of resistance measurement that improves accuracy 
by not including the IR drop of the lead pair that supply the current to 
the resistance under test.

Two wire ohm meters supply constant current to a resistance and measure 
the voltage drop.  But they also include the drop of the leads.

With four wire measurement, the second pair are connected directly 
across the resistance to be measured.  The first pair supply current, 
the second pair go to the voltmeter that measures the IR drop.  Since 
the voltmeter has a high input impedance, the second pair of leads has 
an IR drop error that is very, very small.

It is a very good method for very low resistances.

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