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2-28 Close/Open Switching Module Channels Model 2701 User’s Manual

Figure 2-10

Testing DUT 1

Test procedure:

NOTES The following test procedure assumes a Model 7700 switching module installed

in slot 1 of the mainframe.

The procedure assumes that the instrument is operating in the continuous

measurement (triggering) mode (see “Defaults and user setups,” page 1-22).

Do not use the following procedure to perform thermocouple temperature

measurements with the INTernal or EXTernal reference junction selected. The

SIMulated reference junction will instead be used resulting in invalid readings.

The “ERR” annunciator will turn on to indicate that the integrity of the

temperature reading is questionable.

DMM

Model 7700 Switching Module

Model 2701

Slot 1

Equivalent Circuit

DUT

Ch 23

(Closed)

DMM

Mutliple channel operation:

Open channels

Close channel 123

Close channel 125

Close channel 101

Close channel 111

DUT

External

Source

External

Source

Input

Ch 25

Ch 1

Sense

Ch 24

Ch 11

Sense

Keithley 2701 User Manual

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