System Switch/Multimeter User's Manual Section 5:
Basic Digital Multimeter (DMM) Operation
-900-01 Rev. A / August 2007 5-
Keep in mind that V
MEAS
includes the voltage drops of the input test leads (Input HI and Input LO).
Therefore, the actual voltage drop across the DUT is V
MEAS
minus the two voltage drops in the
test leads. Since matched inputs are used, the voltage drop is 2 x V
LEAD
. Therefore:
V
DUT
= V
MEAS
- 2(V
LEAD
).
Figure 5-18: Four-wire ratiometric method