Model 8010 High Power Device Test Fixture User's Manual
Section 3: Working with devices and instruments
8010-900-01 Rev. C / March 2017
3-9
The 4-wire sensing method, as shown in the following figure, minimizes or eliminates the effects of
lead resistance by measuring the voltage across the resistor under test with a second set of test
leads. Because of the high input impedance of the voltmeter, the current through the sense leads is
negligible, and the measured voltage is essentially the same as the voltage across the resistor under
test.
Figure 17: Four-wire resistance sensing
Four-wire remote sense is recommended when device resistances are low enough (less than 1 k
Ω
)
that resistance in the test leads will cause significant error in the measurement. For more
information, in the Series 2600 or Model 2651 Reference Manual, see DUT test connections for
information on two-wire and four-wire sensing.
If you are using remote sense connections in the Model 8010, you must enable remote sense on the
instrument.
