Problem reading GPIB in 2400 swV Linear Stair with DCV -gpib.vi

[PeteC82]

Hi, I'm trying to execute a simple sweep V, measure I routine for my Keithley 2400 sourcemeter using code from Keithley's website.

I can talk to the Keithley ok, and the readout from the Keithley front panel during a sweep makes sense but somehow the data aren't being saved correctly into LabVIEW. e.g. The recorded voltage swings wildly from ~1E10-3 to ~1E10+38. Another symptom is that if I ask for 10 data points, I get 25.

Can anyone help?

[hmarcano]

Try using the instrument driver instead of making you own, that should help. Try the following link:

http://sine.ni.com/apps/utf8/niid_web_display.model_page?p_model_id=1583

Hope it helps