Keithley 7709, Руководство пользователя

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4
Rows 1 and 2
System channel operation (
ROUT:CLOS
command) is used to close Rows 1 and 2 channels to connect a DUT to the DMM.
With a 2-wire function selected (i.e., DCV), system channels 1 through 8 can be closed. When one of these channels is closed,
channel 50 automatically closes to connect Row 1 to the DMM Input.
Figure 2 shows a DUT connected to column 3 of the
matrix. Closing system channel 3 connects the DUT to the DMM.
With a 4-wire function selected (i.e.,
Ω
4), system channels 1 through 4 can be closed. These four channels are paired to chan-
nels 13 through 16 (channel 1 paired to channel 13, channel 2 paired to channel 14, and so on). When one of these system
channels is closed, its paired channel, and channels 49 and 50 also close to connect the DUT to the DMM. As shown in
Figure 3 , closing system channel 3 also closes channels 15, 49, and 50 to connect the DUT to the DMM.
Figure 2
2-wire DUT measurements using Model 27xx DMM
Figure 3
4-wire DUT measurements using Model 27xx DMM
HI
LO
Input
HI
LO
Sense
9
10
11 12 13
14
15 16
50
49
1 2 3 4 5 6 7 8
HI
LO
HI
LO
Col 1
HI LO HI LO HI LO HI LO HI LO HI LO HI LO HI LO
Col 2 Col 3 Col 4
Col 5 Col 6
Col 7 Col 8
Row 1
Row 2
DUT
DMM*
System channel 3 closed to connect DUT to DMM Input. Note that
backplane channel 50 closes automatically.
* 2-wire function
selected.
HI
LO
Input
HI
LO
Sense
9 10 11 12 13 14 15 16
50
49
1 2
3
4 5 6 7
8
HI
LO
HI
LO
Col 1
HI LO HI LO HI LO HI LO HI LO HI LO HI LO HI LO
Col 2
Col 3 Col 4
Col 5 Col 6
Col 7 Col 8
Row 1
Row 2
DUT
DMM*
System channel 3 closed to connect DUT to DMM Input and Sense.
Note that paired channel 15, and backplane channels 49 and 50
close automatically.
* 4-wire function
selected.