Keithley 708B Reference Manual page 509

Section 8: Troubleshooting guide
To identify installed switching cards from the remote command interface:
Use print(slot[X].idn)to query and identify installed switching cards:
print(slot[X].idn)
Where: X = slot number (from 1 to 6 for Model 707B or 1 for Model 708B)
Example
To get a list of all switching cards installed in the slots of a Model 707B, send the following command
over the remote command interface:
for x=1,6 do print (slot[x].idn) end
The response will be similar to the following:
7174, 8x12 Fast Low-I Matrix, 01.00a, <Module Serial Number>
7072, 8x12 Semi Matrix, 01.00a, <Module Serial Number>
Empty Slot
Empty Slot
Empty Slot
Empty Slot
8-12
Models 707B and 708B Switching Matrix Reference Manual
707B-901-01 Rev. A / August 2010