How to implement SCPI commands for setting current sweeps with current source (Keithley 6221)

[m.donatti]

Hi,

I'm trying to perform a similar sine sweep with Keithley 6221, obtaining the "Error -222 Parameter data out of range" every attempt to set the current below 1uA remotely.

I'm able to configure the sine wave from the front panel as expected, generating sine waves down to 2pA peak.

Any suggestions?

Thanks in advance.

[m.donatti]

I've figured out.

The error code is related to the VI KE6221 -- Set Wave Amplitude. The current is sent as fractional number, every current below 1uA is interpreted as 0, giving the Error 222 - Out of Range. I've changed the format to scientific, now the 6221 sine wave is working as expected.

PS: The set wave offset value has the same issue.