http://us.fluke.com/usen/apps/PM/8846aapplication.htm?flukecmpgn=FPMb-12-10-08
-------- Fluke 8846A Application
Situation:
Using two wires to measure resistance is convenient, but causes  
measurement error. You can virtually eliminate this error by using  
four leads and a multimeter with separate source and measure  
terminals. Unfortunately, adding leads and connections makes the  
measurement more complicated or nearly impossible on miniature surface  
mount devices (SMD). You have additional leads to connect and you may  
have to swap clips and probes as you change from voltage to resistance.
Why measure resistance with four wires? Two-wire resistance  
measurements introduce error due to voltage drop in the test leads.  
Four-wire resistance measurements eliminate current in the voltage  
leads and eliminate this source of error.
A patented new technology from Fluke maintains the convenience of  
using two leads, but delivers the measurement performance of a 4-wire  
method. --------

  WFT Electronics
Denver, CO   720 222 1309
" dent the UNIVERSE "

All ideas, text, drawings and audio , that are originated by WFT  
Electronics ( and it's principals ),  that are included with this  
signature text are to be deemed to be released to the public domain as  
of the date of this communication .

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