Determination of the deviation of indication from the fitting curve fa
The deviation from the fitting curve shall be determined for each torque step for the
indication as a function of the torque using an equation of the 1st, 2nd or 3rd degree
without absolute term. The equation used shall be stated in the calibration certificate.
The equation shall be calculated as the least squares fit.
The deviation from the fitting curve shall be calculated from the following equation (7).