Division 4.4.7 Assessment of total uncertainty of the torque loss

In the case the calculated uncertainties U_T,in/out are below the following limits, the reported torque loss T_loss,rep shall be regarded as equal to the measured torque loss T_loss .

U_T,_in : 7,5 Nm or 0,25 % of the measured torque, whichever allowed uncertainty value is higher

U_T,_out : 15 Nm or 0,25 % of the measured torque, whichever allowed uncertainty value is higher

In the case of higher calculated uncertainties, the part of the calculated uncertainty exceeding the above specified limits shall be added to T_loss for the reported torque loss T_loss,rep as follows:

If the limits of U_T,in are exceeded:

• T_loss,rep = T_loss + ΔUT_in

• ΔU_T,in = MIN((U_T,in – 0,25 % * T_c) or (U_T,in – 7,5 Nm))

If limits of U_T,out out are exceeded:

• T_loss,rep = T_loss + ΔU_T,out/i_gear

• ΔU_T,out = MIN((U_T,out – 0,25 % * T_c) or (U_T,out – 15Nm))

where:

U_T,in/out

Uncertainty of input/output torque loss measurement separately for input and output torque; [Nm]

i_gear

Axle gear ratio [-]

ΔU_T

The part of the calculated uncertainty exceeding the specified limits