Keithley 2000-Scan, Instruction Manual

Page: 52 / 86

Combining 2-pole and 4-pole switching (Models 2001/2002)
The Model 2000-SCAN can combine 2- and 4-pole switching in various combinations. For
example, you might require 4-pole switching for only two resistors, while the remaining
resistors could be tested using conventional 2-pole switching.
Figure 3-3 shows a test configuration using mixed 2-pole and 4-pole switching. Four-pole
switching is used only for device 1 (connected to channels 1 and 6) and device 2 (connected to
channels 2 and 7). Six more resistors are tested using 2-pole switching.
Measurement functions for each scanner channel are defined using the INTERNAL-CHANS
menu available by pressing CONFIG-CHAN (see “Using the scanner with the buffer” on
page 3–13 ). Measurement functions for this test would be set up as follows:
Channels 1 and 2:
Ω
4W
Channels 3, 4, 5 and 8, 10:
Ω
2W
Note that functions cannot be defined for channels 6 and 7 with this application because these
channels are paired with channels 1 and 2 for 4-pole switching.
CH 1
CH 2
CH 3
CH 4
CH 5
CH 6
CH 7
CH 8
CH 9
CH 10
DMM Rear Panel
(Model2001/2002
shown)
DUT's (8)
2000-SCAN
Out A
HI
LO
Input
HI
Input
LO
Sense
HI
Sense
LO
Out B
HI
LO
4-Pole
Connections
2-Pole
Connections
Figure 3-3
Combining 2-pole and
4-pole switching
(Model 2001/2002)
3-18 Operation