PVR Karanth

Dear Neil Pate

Thank you Very much for your answer.

When I am trying with Set current vi for single current setting, it works fine. Even the instrument is working well, as I can sweep manually in nano range.....

Here with i am attaching the snapshot of front panel.  Is the front panel parameter adjustments are correct? Is there any changes are required? 

Snap shot of Front Panel.doc

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