I couldn't open your VI, but to display a graph as time, right click the axis and select "Format & Presicion", then change the format to Absolute Time or Relative Time. That's it. If you're using Absolute Time, you should use Get Date\time in seconds and To DBL and wire the result into the property X-Scale>>Offset & Multiplier>>Offset to set the t0 of your axis to the current time.
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