Full definition
Correction of dynamic unbalance in a rotor (fan, impeller, drum) in situ without dismounting it, by adding correction mass based on vibration measurements with an analyzer. Process: measure vibration at correction plane(s), add trial mass, measure vibration change, calculate correction mass and angle by vector trigonometry. ISO 1940-1 defines balancing quality grades G (G1, G2.5, G6.3, G16). Equipment: SKF MARLIN, Emerson CSI 2140, Pruftechnik Vibxpert. Reduces vibration by >80%.