How to Record Waveform graph data( both axes: X and Y)

[srsnerdshack]

Hello,

I have to take a voltage from a Pressure sensor through my NI USB 6009.The DC voltage will be varying and continuous.

I am displaying it on a graph as hown in the VI.

1) How do I record the data in form of text? I want to record the amplitude(Y axis) ( as many points as possible, say every second) as well as the time data(X axis).

This will be printed to my project report. I have to take readings every second, which is difficult to do with a cursor, manually.

2) How do I print the waveform on the graph ? We cannot do a printscreen.

3) Can I replay a graph later, even if the pressure sensor is disconnected?

Can the graph data be stored somehow, but the amplitude(Y axis) and time data(X axis) must remain unchanged from the original.

Also the DAQ 6009 is ultimately going to be inside a control design and simulation loop.(As attached in second file)

Now the problem is that every time the loop repeats the previous value gets erased.

Please help.

Thank You very much.

record data.vi

record data2.vi

Edited March 11, 2011 by srsnerdshack