Abstract: A method and apparatus are provided for obtaining the rotational speed of a pump system or other suitable rotating equipment having a self-contained pump electrical equipment power supply. The method features, before being rectified, directing one phase of AC power through a zero crossing circuit that identifies an instant of time the AC voltage crosses from one polarity to the other polarity and triggers a square wave pulse for each instant time. In operation, the AC voltage is detected when it crosses from a negative polarity to a positive polarity, or vice versa. The method also includes steps for measuring the period of the square wave pulse and calculating the speed of the pump or other rotating equipment.

Abstract: An electrical power supply for powering electrical pump instrumentation and process control equipment associated with a pump having a rotating member. The power supply includes an electrical current generator driven by the rotating member of the pump, and a voltage regulator for regulating the output of the generator.

Abstract: A method is provided of identifying a rotating bearing defect featuring the steps of measuring the vibration of the rotating bearing to obtain a waveform signal; filtering the waveform signal to remove unwanted signal frequencies; enveloping the filtered waveform signal to obtain an enveloped low frequency time waveform; and synchronizing the enveloped low frequency time waveform to the running speed of the rotating bearing in such a way to preserve the phase relationship between the tachometer pulse and bearing defect to obtain a time synchronized waveform. The method may include the step of measuring the rotational speed of the rotating bearing; and the step of measuring the rotational speed of the rotating bearing comprises measuring the rotational speed of the rotating bearing with a tachometer.

Abstract: An electrical power supply for powering electrical pump instrumentation and process control equipment associated with a pump having a rotating member. The power supply includes an electrical current generator driven by the rotating member of the pump, and a voltage regulator for regulating the output of the generator.

Abstract: A method of identifying a rotating bearing defect comprising the includes of: measuring the vibration of the rotating bearing to obtain a waveform signal; filtering the waveform signal to remove unwanted signal frequencies; enveloping the filtered waveform signal to obtain an enveloped low frequency time waveform; and synchronizing the enveloped low frequency time waveform to the running speed of the rotating bearing to obtain a time synchronized waveform.

Abstract: A method and system for determining pump cavitation is disclosed. In accordance with the principle of the invention, changes in dynamic fluid pressure within a pump are monitored and compared to a determined cavitation alarm pressure. The determined cavitation pressure is determined as a known percentage of a known non-cavitation pressure. Fluid cavitation is determined when the change in dynamic fluid pressure falls below the determined cavitation alarm pressure. In a further aspect of the invention, a remaining mechanical seal operational life can be determined by maintaining a total time of fluid cavitation and reducing the expected life by the known operational time of the pump and the time the pump is in cavitation.

Abstract: A method and system for determining pump cavitation is disclosed. In accordance with the principle of the invention, changes in dynamic fluid pressure within a pump are monitored and compared to a determined cavitation alarm pressure. The determined cavitation pressure is determined as a known percentage of a known non-cavitation pressure. Fluid cavitation is determined when the change in dynamic fluid pressure falls below the determined cavitation alarm pressure. In a further aspect of the invention, a remaining mechanical seal operational life can be determined by maintaining a total time of fluid cavitation and reducing the expected life by the known operational time of the pump and the time the pump is in cavitation.