Generally, respiratory volumes are measured. Respiratory capacities are calculated from sundry combinations of the measured volumes. The table and the chart here gives a virtuous description of this:
http://en.wikipedia.org/wiki/Lung_volume...
From this chart, you can see that all capacity (including FVC) cannot be measured with a spirometer. Also, the residual volume (RV) is not measured next to a spirometer.
I hope that helps!
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