6-8 Model 2790 SourceMeter
®
Switch System User’s Manual
Keithley 7751, 7752, and 7753 modules
The 7751, 7752, and 7753 modules can also be used with the Ω2 and Ω4 functions of the
Model 2790. However, since these modules do not support system channel operation, the
user must close all appropriate channels using multiple channel operation to make the con-
nection to the DUT. Details on multiple channel operation are provided in Section 2.
Figure 6-5 shows the simplified test circuit for using the Ω4 function of the Model 2790
with the 7751/7752/7753 module to measure the resistance of a DUT. The DUT is con-
nected to channels 10 and 11 (Bank 4) of the 7751/7752/7753. To connect the DUT to the
DMM of the Model 2790, channels 10, 11, 13, 18, and 19 must be closed. Note that the
voltage across the DUT is not sensed through the fuse resistance (see “Fuse resistance
considerations,” page 6-2), so that measurement accuracy is not affected by fuses.
Figure 6-5
Using Model 2790 4-wire ohms with 7751/7752/7753 module
(low ohms measurements)
DMM
Ω4
Input HI
Input LO
Sense HI
Sense LO
DUT
18
Ch 10
Ch 11
= Channel closed by user (multiple channel operation).
Keithley 2790
19
19
18
10
11
10
11
13
13
Source HI
Source LO
Sense HI
Sense LO
Keithley 7751/7752/7753
Fuse
Resistance
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