Re : Re: Re : KUSB 3108 + Labview 8.5

[deetron]

Hi,

First, I am a full beginner in object programmation and in Labview in particular. I Try to measure two signals from a force balance by using a KUSB 3108 (Keithley) and Labview 8.5. I have install the driver named 'KUSB Rev E' and the interface seems correct. Indeed my .vi allows to measure each analogous input from the KUSB-3108. This .vi is based on the functions from the LV-Link provided by Keithley (in particular CreateAinChan.vi and OLReadSingle.vi). However, if i start the application in order to measure both signal (Ain 0 and 1) at the same time an error occurs :"An attempt was made to access a subsystem that is already in use'. I Understand that there is a problem to simulatenously read on both channels but the data sheet of the 3108 model specify that such measurements is possible and the software provided by Keithley can perform acquisitions on several channels.

Any suggestion to fix this problem and identify the source of this error (unaccurate drivers, hardware configuration...) ??

Thanks for your interest in my quest !!

[R_Duval]

Hello.

Could you send us your code to have a look? Thanks in advance.

Regards.

[deetron]

Thank for your proposition but I find the solution by myself. In fact in the first version of my code I open two different channels by using two CreateAinChan.vi, the good choice to measure simultaneously different channels consists in opening the channels in only one CreatAinChan.vi. For instance, in the input parameters of this .vi you need to specify AIn 0, 1 as input parameter in the channel box. It was easy but I am a beginner.

Thank again for your proposition to help me.

[mizaro]

Hi : I have the same problem with this device, can you share your VI ????

[deetron]

I can send you my vi, just give me your email.

[mizaro]

My e-mail is miguezaro@hotmail.com, and thanks a lot for your help, i really appreciate that...