Download Manual

Operation
3-17
4-wire resistance tests
More precise measurements over a wider range of system and DUT conditions can be
obtained by using the 4-wire measurement scheme shown in Figure 3-2. Here, separate sense
leads from the Model 2000 Multimeter are routed through the scanner to the resistor under test.
The extra set of sense leads minimizes the effects of voltage drops across the test leads, greatly
reducing measurement errors with lower DUT resistances. Note, however, that an extra two
poles of switching are required for each resistor tested. For this reason, only five resistors can be
tested using this configuration.
Figure 3-2
4-wire resistance
test connections
2000-SCAN
Out A
HI
Sense
HI
1
1
5
5
DUTs
(5)
LO
DMM Rear Panel
(Model 2001/2002 shown)
6
Sense
LO
Out B
10
A. Test Configuration
HI
Sense HI
Ω
2001
R
Sense LO
LO
2000-SCAN
DUT
B. Simplified Equivalent Circuit