Abstract: The vibration may make centrifuge fault. It is a valuable method for looking up reason of failure to analyze vibrating waveform. The frequency analysis were utilized in real time between P6100 type vertical centrifuges. A forced vibration of the bowl was discovered in lower frequency range. Some improvements were conducted for vibrating monitoring system. The operation safety was reliable because of eliminated damage.

Key words: Centrifuge, Estimation of vibration