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Model 2701 User’s Manual Close/Open Switching Module Channels 2-11

2. Press ENTER to display the prompt to close a channel (CLOSE CH: XXX).

3. Using , , , and , key in the three-digit channel you want to select.

4. Press ENTER. The channel closes and the CHAN annunciator turns on.

Figure 2-4

System channel operation — specifying measurement channel to close

An invalid channel cannot be closed and will cause one of the following error messages to

be brieﬂy displayed:

INVALID CHAN — This message indicates that the channel is not a valid measurement

channel. The following actions will cause this error:

• Trying to close a non-measurement channel, such as a backplane isolation channel,

a channel that sets the pole mode, or a channel that cannot be internally connected

to the DMM.

• Trying to close an amps channel while on a non-amps function. The DCI or ACI

function must be selected in order to close an amps channel.

• Trying to close a paired-channel while on a 4-wire function. For the Model 7700,

channels 1 through 10 are paired to channels 11 through 20 for a 4-wire function.

If, for example, you try to close channel 12 while on the Ω4 function, the

INVALID CHAN error will occur.

• Trying to close a switching module channel that does not exist.

TOO SMALL or TOO LARGE — These messages also indicate an invalid channel. TOO

SMALL indicates that the speciﬁed channel and any other lower numbered channel is

invalid. TOO LARGE indicates that the speciﬁed channel and any other higher numbered

channel is invalid.

CLOSEOPEN

CLOSE CH: XXX

CLOSE:SINGLE

Press CLOSE key

Display SINGLE option

and press ENTER

Specify channel number (XXX)

and press ENTER

Keithley 2701 User Manual

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