cal·i·bra·tion 
(kăl′ə-brāshən)
(kăl′ə-brāshən)n.
1. The act or process of calibrating or the state of being calibrated.
2.
a. A gradation that shows a position or value, as on a measuring instrument.
b. calibrations A set of such gradations: the calibrations on a pressure gauge.