I am interfacing Keithley 6220 current source by Labveiw 8.6 through GPIB bus and KUSB 488A. I am using example VI which is provided with Keithley drivers for current sweep. I don’t have any problem in sweeping the current in micro or milliamps. But when try to sweep in nanoampere (even the step level in nanoampere), it shows error message “-222” which stands for “Parameter data out of range”.
Can anybody please help me to resolve this error to sweep in nanoampere (stop level as well as step level in nA). I am herewith attaching the the VI which I am using. Front Panel during run (which shows my controls) and the error message are also been attached.
Thanks in advance
Front panel.doc
KE622x -- Execute Current Sweep Example.vi