System Switch/Multimeter User's Manual Section 4: Closing and Op
ening Switching Module Channels
-900-01 Rev. A / August 2007 4-
Assume a switching module is installed in Slot 1 of the mainframe, and a 4-wire function, such
as Ω4, is selected. When Channel 1001 is closed using the Close key, the Channel 1 relay and
the input backplane isolation relay (Channel 1911) closes to connect the channel to DMM Input.
Also, the Channel 11 relay and the sense backplane isolation relay (Channel 1922) closes to
connect the paired channel to DMM Sense.
Figure 4-4: Four-wire function
Identifying installed modules and viewing closed channels
Use the SLOT key to scroll through the model numbers, description, as well as the firmware
revision of the installed switching module(s).
Switching module queries (remote operation)
Use print(slot[x].idn)to query and identify installed switching modules and channels that
are closed:
print(slot[x].idn)
where: x = slot number (from 1 to 6)
The following example uses the print(slot[x].idn) to determine which switching modules
(or pseudocards) are installed in the Series 3700.
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