Division 3.3.5 Measurement equipment

For the measurement of the torque independent losses, the measurement equipment requirements as specified for Option 1 in 3.1.4. shall apply.

For the measurement of the torque dependent losses, the following requirements shall apply:

The torque sensor measurement uncertainty shall be below 5 % of the measured torque loss or 1 Nm (whichever value is larger).

The use of torque sensors with higher measurement uncertainties is allowed if the parts of the uncertainty exceeding 5 % or 1 Nm can be calculated and the smaller of those parts is added to the measured torque loss.

The torque measurement uncertainty shall be calculated and included as described under 3.3.9.

Other measurement equipment requirements as specified for Option 1 in 3.1.4. shall apply.