Opening And Closing 7702 Channels; Channel Assignments - Keithley 2790 User Manual

Model 2790 SourceMeter

Opening and closing 7702 channels

Normally, system channel operation is used to control 7702 input channels.
NOTE
The following points summarize system channel operation. Details on system channel
operation for the 7702 module is provided in Section 2 of the Model 2790 Reference
Manual.
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Channel assignments

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:
®
Switch System User's Manual
It is not recommended, but multiple channel operation can be used to control a
7702 module. For multiple channel operation, the 7702 module is controlled in
basically the same way that a 7751/7752/7753 module is controlled (see
Section 2), except that multiple channel control (:ROUT:MULT) must be used to
control the 7702 module. More details on multiple channel operation is provided in
Section 2 of the Model 2790 Reference Manual.
When an input channel is closed for a 2-wire function, a backplane isolation chan-
nel automatically closes to connect the input to the DMM of Model 2790.
Ω 2 function selected, closing channel 1 also closes channel 45.
Example: With the
When an input channel is closed for a 4-wire function or operation, the two back-
plane isolation channels and the 2-pole/4-pole relay also close to connect the input
to the DMM.
Ω 4 function selected, closing channel 1 also closes channel 21
Example: With the
(paired channel), 45 (backplane channels), and 43 (2-pole/4-pole relay).
While in the normal measurement display state, only the input channel that is
closed is displayed on the Model 2790. For a 4-wire operation, the paired input
channel is not displayed.
Only one input channel (and its paired input channel for 4-wire) can be closed at
the same time. When you close another input channel, the previous input channel
opens.
CH is the channel number
101 = Slot 1, Channel 1
218 = Slot 2, Channel 18
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