Strain-gauge balances must be calibrated before use – i.e. dependency of balance´s signals to the actual loading must be known. WTtech.CZ offers a delivery of Calibration Rigs for external and internal aerodynamics balances resp. multi-component balances in general. Calibration Rigs apply a loading (forces and moments) to the balance and within a connection with calibration software store the data in a calibration file. A balance deformation due to actual loading is automatically compensated by a special device. Calibration matrices are calculated by a special software later.