Michael Ross via EV wrote:
Keep in mind that many hand held meters cannot accurately report mOhms. You should look up the specs on your meter to see what it is actually capable of.
Indeed, most normal meters are inaccurate below about 1 ohm. Their own lead wires and internal circuitry adds more resistance than that.
There are special meters for measuring very low resistance values (usually called "milli-ohm" or "micro-ohm" meters. They usually make 4-wire measurements. Four wires connect to the unknown resistance; two supply a known current, and the other two measure the (tiny) voltage produced by this current. This method cancels out the resistance of the wires and connections themselves.
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