Keithley 2790 User Manual

6-6 Model 2790 SourceMeter
®
Switch System User’s Manual
Keithley 7702 module
The 40 two-wire (or 20 four-wire) input channels of the 7702 module make it ideal to test
multiple DUT. With system channel operation, a single channel closure connects a DUT to
the Model 2790 DMM for measurement. Testing multiple DUT can be further automated
using the scanning feature of the Model 2790. Once configured, the testing process can be
started with a single press of a button (or when commanded for remote programming).
NOTE Details on scanning 7702 channels are provided in Section 7 of the Model 2790
Reference Manual.
Figure 6-3 shows the simplified test circuit for using the Ω4 function of the Model 2790
with the 7702 module to measure low ohm DUT. The DUT is connected to channels 1 and
21 of the 7702. When channel 1 is closed using system channel operation, the DUT con-
nects to the DMM of the Model 2790.
Figure 6-3
Using Model 2790 4-wire ohms with 7702 module (low ohms measurements)
DMM
Ω4
Input HI
Input LO
Sense HI
Sense LO
DUT
1
Keithley 7702
= Channel closed by user (system channel operation).
The channels that also close when Ch 1 is closed are not
shown. These include the paired input channel (Ch 21) the
4-pole relay (Ch 43) and backplane channels (Chs 44 and 45).
Keithley 2790
1

Keithley 2790 Specifications

General

Brand	Keithley
Model	2790
Category	Switch
Language	English