keithley GPIB control with LabView in loop mode

[Dennis_Knutson]

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luminita wrote:

Hi!

Didn't handle to do it. I can't open as well the examples. My version is 8.5 and do not have any ramp....

Hope to come up with other news soon.....

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Ramp comes with LabVIEW full or higher.

Here's one way to do it with a shift register.

Message Edited by Dennis Knutson on 03-09-2010 08:05 AM

[Aliweal]

Hello Dennis,

Sorry!!, I am beginner with labview8.5.1, my question is how to read the wave continuously from Keithley-2010 without writing everytime.

I already succeed with initializing keithley and the other stuff but I am stuck with this point for long. I tried all the possibilities to take the VISA-Write out of the while-loop but I failed. I used another strategy to read by using "GPIB-read and GPIB-Write" but I got same problem.

Please notice my program runs ok, I could see the wave on the plot, but the way I am doing that is not right and it is less accurate. i need accurate reading for stability measurements.

Regards

Ali

PS: My reading program in the attachment file.

[Dennis_Knutson]

Aliweal,

Why do you continue to ask the same question and in a hijacked thread? You simply cannot do just a read. The instrument will not send any data unless you request it with a query. That is how GPIB instruments work. Your accuracy of the measurement has nothing to do with doing the write and does not pose a problem that I can see.

[Aliweal]

Dear Deinns,

It might be right, the program might not effected with the writing interrupt.

But I am changing the labview program with another HP-VEE program, which

is already exist in my company. My supervisor expect same performance from

labview as HP-VEE. With HP-VEE, I don't have multiple writing, it write once (Initialize) 

and I read for days. I want to use VISA-configuration or something close and just

read the sample from Keithley, but I have also difficulty in that too.

Do you have any hint to start??!!

Thanks in advance

[Dennis_Knutson]

Whatever commands that are being sent by the VEE program are going to be identical to whatever commands you send with LabVIEW, C, VB, etc.

If you are using an NI GPIB card with VEE, then you can turn on NI-spy in MAX and capture what the VEE program is doing. If you are not using an NI card, then I don't know what, if anything can be done.

Exactly what kind of difference are you seeing between the two programs?