Plot excel data onto X-Y graph with time stamp

Dear all, I have the same set of data but it is saved in excel format instead of text file now. However i think the column data are separated by tab, i have tried to write some codes but it dont seem to plot out the graph properly. I have no problem ploting out data in text file but not this excel file. Can anyone help out to plot this graph with timestamp?
Attachments:
test4.txt ‏1 KB

I still don't understand your comment 'I have no problem ploting out data in text file'. The Read From Spreadsheet by default uses a tab separator so you should have no problem reading the file. Post the code you have already written so someone can see where your problem is.

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Attachments:
DigitalNSample.vi ‏27 KB
DigitalNSample.vi ‏27 KB

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Plot excel data onto X-Y graph with time stamp

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