Thanks for the reply,
Unfortunately cant try this out now as my DAQ usb is in the lab. A few more questions, do I place the while loop around the whole of the VI just leaving the write to file VI outside of it? Or is it just a select few components that go into the while loop? Im not exactly sure what the loop sample rate is but we have been running the standard voltage aquisition VI at 10 000Hz, is this what you meant or is this a different sample rate?
When it comes to writing the file all I am going for is a series of voltage readings against time to plot on an excel graph. Apologies for my lack of knowledge, started learning labview last week:)
Thanks again,
Dave