Opening And Closing Channels; Front Panel Operation - Keithley 2790 User Manual

Model 2790 SourceMeter

Opening and closing channels

Multiple channel operations are used to control 7751, 7752, and 7753 channels:
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•
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To control the appropriate switching module, the slot number must be included with the
switching module channel number. The channel assignment is formatted as follows:
SCH where: S is the slot number (1 or 2)
Examples:
NOTE

Front panel operation

As shown in
7753 channels:
After closing or opening a single channel:
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•
•
NOTE
®
Switch System User's Manual
Only the specified channels are opened or closed. Unspecified channels are not
affected.
Relays to connect signals to the backplane (DMM) of the Model 2790 do not close
automatically. You must explicitly close them to perform a measurement. For
example, with a DUT connected to channel 1 of a 7751, 7752, or 7753 module, you
would have to close channels 1, 14, and 18 to measure it with the Model 2790.
Closed channels are not displayed by the Model 2790 while in the normal display
state. Closed channels can be viewed from the VIEW item of the CARD menu (see
"Viewing closed channels" for details).
CH is the channel number
101 = Slot 1, Channel 1
218 = Slot 2, Channel 18
Interlock of the 7751/7752/7753 must be enabled in order to close channel 18,
19, or 21 and open channel 20. See
ated with open interlock and see "Interlock" in
interlock.
Figure 2-4, the OPEN and CLOSE keys are used to control 7751, 7752, and
A message indicating the action (i.e., "101 CLOSED") will be displayed briefly.
To close another channel, simply key in the channel number and press ENTER.
Press EXIT to exit from the open/close menu structure.
The edit keys (left, right, up, and down arrow keys) are used to display a channel
number. Pressing ENTER opens or closes the channel.
"Open interlock errors" for errors associ-
Section 5 for details on using the
2-13