Keithley 2400 not being recognized by Labview/MAX

[Andrew D]

I am trying to control a Keithley 2400 source meter from Labview. While I have downloaded the most recent Labview drivers for the device, I am unable to use them as I cannot get Labview to 'see' the device. The source meter is connected to the PC via an NI GPIB-USB-HS cable which is recognized by the device manager. However, in MAX when I scan for GPIB devices it says 'instruments not found'. Any ideas how to debug this?

More details:

Latest version of VISA is installed and has been used successfully to drive RS-232 devices.

The instrument works with the same cable and setup on a different PC that is also running Labview 2009.

[BROhan]

Hi Andrew D,

The biggest clue that you provided was that the instrument was working with the same cable on a different PC. Thanks for thoroughly explaining your previous troubleshooting techniques.

What operating system are you using, and what version of the NI-488.2 driver are you using? Are all the drivers the same between the two computers?

Since your GPIB-USB-HS cable is showing up in MAX, I would argue that the NI-488.2 driver is installed correctly. And the LabVIEW driver for the 2400 isn't necessary to recognize the instrument's presence in MAX. I would suggest trying a different USB port on the same computer, and rechecking the connection between GPIB cable and the 2400. I know this seems naive, but there may be an improper connection or misaligned pins.

Let us know how these steps turn out.

[JÞB]

the same cable and setup on another PC

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I see three possible sources of trouble here since the GPIB controler is seen but the 2400 is not and the 2400 is apparently correctly configured to communicate on GPIB (as a quick aside- the unit is 488.0 compliant so any bus you hang it on will downgrade to LOW speed and the HS-GPIB advantage is gone)

1) another device on the bus in the offending system is on the same address.

2) the offending system violates one or more GPIB bus requirements (too much cable, too many devices, not enough devices powered)

3) the offending system has a hardware issue (bad handshake driver on one device, bad cable in the system)

Try removing all equipment from the bus and use a short cable between just the 2400 and the PC.

[kiethly 2400 Source meter driver]

I have installed a student edition of LABview 2010 which has been activated .

I downloaded the Kiethly 2400 source meter but i am not able to open it since it is searching for 24XX.lvlib file .

Where can i find the library ?

What has gone wrong with this ?

Thanks,

Shreyas

[Dennis_Knutson]

You installed it to the incorrect place, probably. It should be in the instr.lib folder.

[kiethly 2400 Source meter driver]

Thanks a lot !!! 

its working now.

So do we have to copy all the drivers into this folder for proper functioning ???

[Dennis_Knutson]

No, but then you have to some editing.