校准

校准	jiào zhǔn	to calibrate
校	jiào	to check; to collate; to proofread
校	xiào	(bound form) school; college / (bound form) (military) field officer
准	zhǔn	to allow / to grant / in accordance with / in the light of
准	zhǔn	accurate / standard / definitely / certainly / about to become (bride, son-in-law etc) / quasi- / para-