Sampling rate

[DataLogger2]

I  am using the VI Logger Lite to sample and record data.  I have a USB-9233 device and have created a data logging task using VI Logger.  I am new to creating Labview VIs and tasks. 

I have set up the task to sample at 40000Hz for 1200000 scans (ie. to sample for 30 seconds).  However when I get the data back, the text file header says it's sampling at 2e-5 s (50000 Hz) and records 1200000 points in 24 seconds. 

How can I sample at the set sampling rate, or create a VI using DAQmx to sample and log data for me?

Thanks.

[devchander]

This DAQmx Vi should log data in the manner you want

regards

Dev

Message Edited by devchander on 03-01-2006 06:59 AM

[DataLogger2]

Thanks for the help and the VI!

I am now having a problem with the channels...the default device and channel listed is: PXI1Slot2/ai0.  If I run the VI I get an error message (200220) that says the device identifier is invalid.  If I change the channel name to Dev1/ai1 from the pull down menu, I get the same error message.

How can I fix this problem?

Thanks

[devchander]

Go to MAX>> Devices and interfaces>>daqmx devices, and  find the device name of the DAQ card you want to acquire from.

Now enter this Device ID and channel number (as per NI-DAQmx physical channel naming convention) in the physical channels control  to acquire from that channel

Hope this helps

Regards

Dev