Unlocking Calibration - Keithley 7711 User Manual

Remote interface
ROUT:MULT:CLOS <clist>
— Returns list of all closed channels.
ROUT:MULT:CLOS?
ROUT:MULT:CLOS:STAT? <clist>
— Closes channels 1 and 5 to OUT A and OUT B respectively
ROUT:OPEN:ALL
The following command is not available:
ROUT:MULT:OPEN <clist>
NOTE
For example, if a Model 7711/7712 is installed in slot 1 and the ROUT:MULT:OPEN (@101) com-
mand is sent, a -221, "Settings Conflict" error would be reported.
DMM measurements
None of the channels of the 7711/7712 module are connected to the internal DMM (the channels cannot be connected to the
backplane). If your test system requires DMM measurements, you can use a measure card in one of the other mainframe slots
or you can use the front panel inputs of the Model 27xx.
Remember to use multiple channel operation to control the 7711/7712 module and system channel operation to control a
measure card for DMM measurements. If you attempt to close a 7711/7712 module channel using front panel system channel
operation, the message "NO MEAS CARD" will be displayed briefly.
If you use front panel inputs for measurements, make sure that the front panel INPUT switch is in the out (F) position.
S-parameters
S-parameters allow a text string of up to 238 ASCII characters to be stored on a module. This can be used for system
calibration of cable and module losses. The calibration text string is stored on the module, independent of the Model 27xx
mainframe.

Unlocking calibration

Use the following sequence of commands to unlock calibration (factory default code):
CAL:PROT:CODE "KI0027xx"
CAL:PROT:CARD1:INIT
CAL:PROT:CARD1:SPAR "......"
CAL:PROT:CARD1:SAVE
where: = 00 (for 2700)
xx
= 01 (for 2701)
xx
= 50 (for 2750)
xx
NOTE Your mainframe calibration unlock code will remain the factory default code unless it is changed.
12
— Closes specified channels (unlisted channels not affected unless in the same bank).
— Query closed channels in list (1 = closed).
— Invalid command for the Model 7711/7712 module.