1-8 Getting Started Model 2750 Multimeter/Switch System User’s Manual
Pseudocards
Using remote programming, you can assign a pseudocard to an empty switching module
slot. With a pseudocard “installed,” the Model 2750 will operate as if the switching mod-
ule is installed in the Model 2750. This feature allows you to configure your system with-
out having the actual switching module installed in the unit. There is a pseudocard for
every Keithley Model 77XX series switching module. For details, see “Pseudocards,”
page 2-6.
Identifying installed switching modules
On power-up, the model numbers of installed switching modules are displayed briefly.
While in the normal display state, slot indicators on the right side of the display indicate
which slots have a switching module or pseudocard installed.
NOTE If a Model 7700, 7701, 7702, 7703, 7705, 7708, or 7709 switching module is
removed while the Model 2750 is on, the slot indicator for that slot will remain
on, and the instrument will operate as if the module is installed. That is, the
Model 2750 will operate as if the pseudocard is installed.
If a Model 7706 or 7707 is removed while power is on, error +523 “Card hard-
ware error” will occur, and the module will be removed from the system.
In general, it is not recommended to install or remove switching modules with
the power on.
The CARD menu and remote query commands can be used to identify modules installed
in the mainframe. For details, see “Switching module installation and connections,”
page 2-3.
2750-900-01.book Page 8 Wednesday, August 3, 2011 7:56 AM
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