5.Rotor acceptance criteriaRotor is acceptable if the synchronous compensated vibration amplitudes measured on both runs are within the values specified in the Table 1(reference to API612,6th edition) and /or customer’s specification. The rotor balancing will be than checked again and the residual unbalance recorded: no balancing adjustments shall be made if the value is less than 4 x API ii . A residual unbalance exceeding the limits specified in the API612 (6# edition) is allowed as the rotor has already been submitted to the OS test and the vibration levels were within the limits.