labview not detecting usb-gpib

[reek_l]

Hey, I just started using Labview, and my first eperiment would involve dealing with a HP multimeter (model-34401 A ). I was using the GPIB/USB of Keithley KUSB-488B. I installed the drivers for the USB and for the muiltimeter. Additionally, I isntalled VISA and NI 488.2. Then, I connected my multimeter to my laptop using the USB port. When, I try scanning for instrument drivers it shows nothing. I even went to NI MAX and VISA, yet I'm unable to see my device. Could anyone please help me out ? 

Thanks.

[Dennis_Knutson]

Why would you install an NI GPIB driver for a Keithley controller? Do their instructions tell you to do that or did you assume any old driver will do? I would suggest installing the driver from Keithley or using an NI controller for the driver you already installed.

[reek_l]

Hey Dennis,

Thanks a lot, I installed the respective drivers, unisntalled NI 488 in the process. Now as I proceed, I see that although VISA is showing me my multimeter in GPIB multimeter its still not seen in MAX.Its showing something like ASRL 10,...LPT. I'm enclosing the screenshot.  Any idea, how come ? Oh , and I also enabled Tulip in VISA options. 

Thanks a lot for the help so far. 

[Dennis_Knutson]

I have very limited experience with the Keithley. If you have the instruments listed as VISA resources and LabVIEW lists them as well, you don't need to have MAX list anything. If they don't show in LabVIEW, there may be s problem with what versions of VISA you have installed. Anything from Keithley should be secondary and NI's as primary.

[reek_l]

Okay thanks, I'll try doing that by starting to create my VI.

[reek_l]

Ok , I've got the drivers installed, LABVIEW is detecting my instrument. Now, how do I get these measurements? Is there any example that I can look  through and use it to measure ? Im new here, and didnt really understand how we're supposed to create a VI that can access it remotly.Oh ! and I have LABVIEW 8.5 

Any help on this will be helpful. Thanks in advance.

[reek_l]

I tried accessing it using a simple VISA read option. I gave the resource name and write buffer as string controls, and VISA resource output as string indicator. I gave return count as 100.  VISA Resource name I gave the Instrument address, and for the write command I gave the command as found in the manual. Then when I execute it, I get an error as shown. 

[Dennis_Knutson]

There are examples for the 34401. Usr Help> Find Examples and look under Hardware Input and Output. You don't show the resource name on that image. You should right click on the VISA Write and select Create Control for y the resource name. That has a pull-down menu that you would select the name. Your name is invalid based on the error. Your write buffet string seems to be just gibberish. I have no idea how you have determined that LabVIEW has detected the instrument.