Keithley 2002

Calibration Command Reference
3-12
:SWITch? (CALibration:PROTected:LLEVel:SWITch?)
Purpose To request the state of the low-level calibration lock.
Format :cal:prot:llev:swit?
Response 0 Low-level calibration locked
1 Low-level calibration unlocked
Description :SWITch? query requests the status of the low-level calibration lock from the instrument. This
:SWITch? query should not be confused with the :SWITch? query that requests the status of the
comprehensive calibration lock (see paragraph 3.3.2.)
Programming Note To unlock low-level calibration, hold in the CAL switch while turning on instrument power.
:CAL:PROT:LLEV:SWIT? Request low-level CAL switch status.
:STEP (CALibration:PROTected:LLEVel:STEP)
Purpose To program individual low-level calibration steps.
Format :cal:prot:llev:step <n>
Parameters 1 20V AC @ 1kHz
2 20V AC @ 30kHz
3 200V AC @ 1kHz
4 200V AC @ 30kHz
5 1.5V AC @ 1kHz
6 200mV AC @ 1kHz
7 5mV AC @ 100kHz
8 0.5mV AC @ 1kHz
9 +100V DC
10 -20V DC
11 Rear inputs short-circuit.
12 20mA AC @ 1kHz
13 2V AC @ 1HZ
Description The :STEP command programs the 13 individual low-level calibration steps; <n> represents the
calibration step number. The appropriate signal must be connected to the instrument when pro-
gramming each step, as summarized in the parameters listed above (see Section 2 for details).
Example :CAL:PROT:LLEV:STEP 7 Program low-level step 7.