Prerequisites
Place the sensors on the bearing races in the vertical, horizontal, or both directions.
Overview
Coast Down Peak Hold checks for resonance during a coast down by holding the highest amplitude in a spectrum. When you shut down the equipment, the operational frequency may excite a suspected resonant frequency. If the vibration peak at the shaft turning speed passes through a resonant frequency during the coast down, the amplitude increases at that frequency and indicates resonance. Coast Down Peak Hold displays only the highest frequency in that range.