I need my Vi to save only one point of data every 30 seconds

Hello

I have trouble getting my VI to make only one point of data every 30 seconds. I collect a couple and the temperature. If you take a look at the queue of lvm, you will see that I have two data points every 30 seconds. I want only the VI to take one. I can do this by going to the DAQ assistant and change the mode of acquisition of N samples 1-sample (on request), but if I do this I am not able to see my couple of graph in real time.  In addition the VI takes data about every 30 seconds. Is there a way I can strengthen this also?

1. change your graph of couple to be a graph.  A graph has a history associated with him, so he keeps old values in a circular buffer for you.  A chart shows just the last thing written in it.

2. change your sample of Compression to be 64.  It is currently set at 30, which means that you will end up with 2 samples in your data.  That's why you write 2 samples when write you it.

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