Standard - Mechanical vibration - Evaluation of machine vibration by measurements on non-rotating parts - Part 2: Land-based steam turbines and generators in excess of 50 MW with normal operating speeds of 1500 r/min, 1800 r/min, 3000 r/min and 3600 r/min (ISO 10816-2:2001/Cor 21:2004, IDT) SS-ISO 10816-2/Cor 1:2004 - Swedish Institute for Standards, SIS