I searched the boards and found this driver for a Keithley 2400 that should run with Labview 8. I have Labview 8.6. http://sine.ni.com/apps/utf8/niid_web_display.download_page?p_id_guid=25B255F3AA83660EE0440003BA7CCD71 I put the driver folder in the proper location and the vi's are appearing in the selection menu as expected. I have my Keithley 2400 connected to a serial port on COM1. When I simply try to run the initialization VI it doesn't work. I know it's communicating in some form, because my Keithley goes into remote mode and the initialization driver is able to properly read what the model of the Keithley is. When it gets to the VISA read vi it is timing out, but still outputs the correct model identification. I don't understand why it's timing out and not working. Is there something else I should've installed? The driver readme says the only additional software required is NI-VISA 3.2, however I have version 4.4, so I should be fine. I just don't understand why it's "sort of" working. Any help would be greatly appreciated.

You should verify the terminator used to indicate the end of a message from the instrument. The 2400 can use one of 4 different terminators:<CR><CR+LF><LF><LF+CR>I'm not sure which one is the default one. The driver is written assuming <LF>, though it should work if the instrument is configured to use either <LF> or <CR+LF>. If it's configured for one of the other 2 then you will get a timeout error on the read.

LabVIEW

Keithley 2400 driver for Labview 8 not working

Solved!

Based on the solution, it looks like the problem was that improper termination was being used with commands sent to the device. You'll need to verify which termination the instrument is expecting, and make sure that you include those characters with each command sent.

Justin E
National Instruments R&D