Calibrate to mark (the scale of a measuring instrument) so that reading can be made in the appropriate units.

Industry Calibration The lack of ambiguity in the definition still allows companies to adopt there own meanings.  However, most quality test and measurement organisations understand calibration to mean ensuring that the instrument reads appropriately.  This includes the adjustment of the instrument whether it is inside or outside of the manufacturers specification.  Results are taken both before and after any adjustments.