How to sweep IV curve using GPIB instrument (ILX 3220)

[scintillahx]

Hi, I'm new to Labview---I learned basic stuff, such as strings,arrays, structures,etc. I have an ILX-3220 current source, NI-488.2,and I want to make an IV curve using a light-emitting-diode. I'm really confused about what I should use. I downloaded intrument drivers from ILX's website.They provide some example VIs, but I can only set one current and read one voltage. I try to configure the block diagram by adding a for loop, then I got lost among the complicated SubVIs. I also tried to use I/O Instrument assistant to communicate with the current source, but apprarently it didn't listen to me . I can input the commands one by one (LAS:LDI 5   LAS:LDV?  LAS:LDI 10  LAS:LDV?.....)----not much differently from writing down by hands. Is there a way to sweep IV curve using ILX 3220?

[Dennis_Knutson]

duplicate post

Please don't post the same question to different boards.