Communication with a Keithley 195A through a Prologix USB-GPIB interface

[Atcold]

I would like to interace a laptop with a Keithley 195A (Digital Multimeter).

The only available hardware interface is the GPIB.

On a laptop the available interface is USB.

Than a Prologix USB-GPIB Controller 6.0 device is what should do the job.

Attached there are a sample program from Prologix, a (hopefully) working program for the DMM from Kithley, and what I did (a simple copy and paste).

Result: after running the command ++addr 16, with the program from Prologix (just to start the communication.. I know, I will optimise the program) the program I realised do change the setting of the DMM. Say, I set a Ohm measuring, and the reles switch, but not value is read from the instrument.

What do I miss, or where is the error?

Many thanks

[Atcold · Accepted solution]

Solved!

The following command was missing:

++auto 1 //Turn on read-after-write and address instrument to talk

Let's now optimise the program! ^^

[Atcold]

Here there is the final version!

[Atcold]

Update!

[Mick_R]

I've just got Prologix USB-GPIB adapter and I cant make LV and MAX to find it . Could you help with this?

I have Windows 7 . I have installed  2.08.14 WHQL driver for Prologix  and  NI  488 and VISA drivers.

MAX can not find any device.  although,  Prologix GPIB Configurator communicate with my GPIB instruments OK.

[Dennis_Knutson]

Why would you think MAX should find it? The only thing MAX or LabVIEW is going to find is a new serial port. Installing NI-488 was a waste of time since you are not using an NI 488 controller.

[Naitse_TB]

Hello mate!
I aprreciate your answer with your definitive program.
I was doing a program for the Impedance Analyzer HP 4192A and it helped a lot.