Good day everyone!
I'm currently working on a semiconductor measurement software and I'm using LabVIEW (2013 version), USB, and the Keithley 2450 SMU.
Now, in order, to measure the I-V characteristic of the semiconductor I wish to observe, I need the Keithley 2450 SMU in current generator mode, and measure the voltage. Therefore, I need a series of SCPI commands, to execute the process.
My problem begins, when I ought to use current sweep. The Keithley 2450 SMU won't accept the current sweep command, and the changes, which the command orders. Everything else works, but the beforementioned. Here is the SCPI code I tried (the Keithley 2450 manual also suggests it should work):
//
*RST
SOUR:FUNC CURR
SOUR:CURR:RANG 0.02 % 20mA
SENS:FUNC "VOLT"
SENS:VOLT:RANG 200
SOUR
WE:CURR:LIN 0, 0.02, 20, 1e-3, 1, FIXED
INIT
//
When I open manually the source sweep setting after I run the SCPI commands, the Keithley 2450 SMU[u] isn't changing the sweep settings[/u], in the graph menu nothing (or noise) can be seen, and of course I always get warnings, trigger model failure, and constant current limit problem.
Could you please help me with the current sweeping problem ? If so, could you suggest the correct SCPI commands ?
Yours Thankfully,
Bence