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scanrate of LabView konfigured with USB6009

Hi,
 
I am a USB 6009 user. I use the VI Start - Read - Stop in LabView to read analog input. But i found that the number of values and the scanrate read from the sensor which connected to USB 6009 is too low. Should I increase the scanrate inoder to get more values in my diagramm? How could I increase the scanrate per sample per channel in LabView configured with USB 6009?
 
Thanks your reading,
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Hi Junren,

The USB-6009 is physical bordered.
I post for you this link about the USB- 6009 and the hardware description.


http://sine.ni.com/nips/cds/view/p/lang/de/nid/14605


I don`t know if this DAQ OK for your application . You can look for that in the hardware description.

Would you post more informations about your application?Then I can recommend the best solution for your.


AmirG

Nationale Instruments

 

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Hi,
First of all i want to thank ur reply.
 
The situation Im facing is as follow:
 As written on the technical data sheet, the maximum scanrate is 48 k Sampling per second. I use 2 analog input channel. Therefore at Base configuration utility i set it as continous, Scanrate:22000,No Trigger. This is the possible maximum scanrate i can set.
In my LabView programm, I use the Reading VI in a For-Loop, which N=100. On the same page there is VI Wait until next ms Multiple with a constant 1000. It means whole this process will run for 100 seconds. At the same time i use a VI LabView measurement data write. I need to save the data which read from sensor in a folder, which later i could open with Excel. Now the problem is the data saved is not much enough. There is just exactly 100 values saved within this 100 seconds. How could I increase number of saved values wihtin this 100 seconds? Initially I though maybe the scanrate is not high enough, that's why less values been saved. But now it seems that even i set the scanrate per channel in configuration utility at maximum, it brings nothing. Do you have any idea, inoder to increase the saved values within this 100 seconds?
I save the roughly view of my programm in a picture file by attachment. Hope it could help. Thanks a lot.
 
Junren    
 
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Hi Junren,
I don´t know how many values do you need.
but:
     If you need only 200 values you should change For-Loop N=200 and Wait until next ms of 500.
     So you proces run 100 seconds and you have 200 values.

The formel is For-Loop N*2 and Wait until next ms Multiple (constante/2).
Hope that helps!

AmirG
National Instruments

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Hi AmirG,

Thanks a lot. It functions. I get the number of values i want.

See u.

Junren.

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