Yoz,
Actually, if you refer to the
4472 user manual on page 2-9, there is an explanation of how to enable current excitation. Also, I attached an example of how to do this in LabVIEW 7 using DAQmx calls. This example is also available in the LabVIEW example finder. I hope this helps out, have a good day!
<-*DrkOvrlord*->