Typical Applications; Resistor Testing; Figure 3-1 2-Wire Resistance Test Connections - Keithley 2000-Scan Instruction Manual

3-16 Operation

Typical applications

Resistor testing

The Model 2000-SCAN can be used to test up to 10 resistors using 2-wire measurements, or
up to five resistors using 4-wire measurements. Such tests use the Model 2000 Ω2 and Ω4
resistance functions.
2-wire resistance tests
Figure 3-1
Model 2000-SCAN card provides the switching function, while the resistance measurements are
made by a Model 2000 Multimeter. Since only 2-pole switching is required for this application,
one Model 2000-SCAN card can be used to switch up to 10 resistors.
Measurement accuracy can be optimized by minimizing residual resistance: make connecting
wires as short as possible and limit the number of connectors to minimize path resistance.
Another technique is to short one of the scanner channel inputs, close the shorted channel, and
then enable the multimeter REL feature to null out path resistance. Leave REL enabled for the
entire test.
Figure 3-1
2-wire resistance
test connections
shows a typical test setup for making 2-wire resistance measurements. The
HI LO
Out A
DMM Rear Panel
(Model 2001/2002 shown)
A. Test Configuration
Ω
Multimeter
B. Simplified Equivalent Circuit
2000-SCAN
1
10
10
DUTs
(10)
R
2000-SCAN DUT
1