Name: Keithley 2701
Brand: Keithley
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Model 2701 User’s Manual Getting Started 1-33

Figure 1-5

Connection to DMM for 4-wire function (system channel 106 closed)

NOTE Switching module channels can also be controlled using multiple channel opera-

tion. This allows individual control of all module channels (switches). Multiple

channel operation should only be used by experienced service personnel who

recognize the dangers associated with multiple channel closures. See Section 2

for details.

Close/open operation

The following points on operation pertain to system channel operation only:

• Only one input channel (or channel pair) is closed at one time. When you close an

input channel, the previously closed input channel(s) will open.

• When a system channel is closed, the channel number will be displayed on the

Model 2701. The slot number for the module is also displayed. For example, “103”

indicates that system input channel 3 for a module in slot 1 is closed.

• The paired channel for a 4-wire function is not displayed. Only the system channel

number is displayed. For example, in Figure 1-5, channel number 106 will be dis-

played with the Model 7707 installed in slot 1 of the mainframe.

• Switching modules that have current measurement capability have separate chan-

nels reserved exclusively for the DCI and ACI functions. For example, the

Model 7700 has channels 21 and 22 reserved for amps measurements. With the

DCI or ACI function selected, only channels 21 and 22 can be closed. These chan-

nels cannot be accessed on any other function.

DUT

DMM DMM

7700

Switching Module

7700

Switching Module

Input

Ch 6

Sense

Ch 16

Input

Sense

Ch 16

Ch 6

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