Text: A signal used in rotating machinery measurements, generated by a transducer (usually a proximity probe) observing a once-per-turn gap change event on the rotating shaft. The transducer output signal is represented as one voltage pulse per shaft revolution. This signal can be used for measuring phase angle (e.g., for balancing) and shaft rotative speed, for relating the vibration and rotation frequencies, and as a reference for determining shaft bow and runout. By providing the above information it is used as a general tool in performing analysis of vibration signals to determine machine malfunctions.

See Also: KEYPHASOR TRANSDUCER, KEYPHASOR PULSE, KEYPHASOR EVENT

Source: 100