Switching Loads - Keithley 7013-S Instruction Manual

4.4.3 Switching loads

Figure 4-8 shows a test system that uses the Model 7013
to switch loads on the two outputs of the DUT. This
system also demonstrates how to use a different type of
card with the Model 7013. In this case, a Model 7011
multiplexer card is used to switch the DMM between
Output #1 and Output #2.
With Channel 1 of the Model 7013 closed, Load 1 is
placed on Output #1. With Channel 2 closed, Load 2
HI
Output
#1
LO
DUT
HI
Output
#2
LO
Figure 4-8
Switching loads
7013
CH 1
CH 2
CH 3
CH 4
is placed on Output #1. Note that if both Channels 1
and 2 are closed at the same time, the parallel equiva-
lent of Loads 1 and 2 is seen at the output. Channels 3
and 4 function in a similar manner for Loads 3 and 4 on
Output #2.
Closing Channel 1 of the Model 7011 places the DMM
on Output #1 to measure the voltage drop across the
selected load. Conversely, closing Channel 2 places the
DMM across the selected load for Output #2. To pre-
vent invalid DMM readings, make sure both Channels
1 and 2 are not closed at the same time.
Load Load
2 1
CH 1
CH 2
Load Load
4 3
7011
Mux Card
DMM
OUT
Operation
4-9