Why Do I Need to Use Time Waveform Analysis?

January 16, 2018

Condition Monitoring Expert Tip #7 by Mobius Institute Spectrum analysis provides a great deal of information about the health of rotating machinery. But you should consider the spectrum as a summary of the vibration within the machine. The Fast Fourier Transform takes the time waveform and computes how much of each frequency is present and […]

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Why Do I Need to Use Phase Analysis?

December 19, 2017

Condition Monitoring Expert Tip #6 by Mobius Institute The vibration spectrum can provide clear indication of certain fault conditions, but when you see a large peak at the running speed (1X) what will your diagnosis be? What if you also see peaks at 2X and 3X? Now, if you are monitoring a large fan with […]

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Which is the Best Bearing Fault Detection Technique?

December 5, 2017

Condition Monitoring Expert Tip #5 by Mobius Institute Now this is a tricky question to answer… We have a few contenders: high frequency vibration analysis, regular vibration analysis, ultrasound, oil analysis, wear particle analysis, and infrared analysis. Let’s start by ruling a few of them out. Infrared analysis is used to detect heat in a […]

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One Condition Monitoring Technology is Not Enough!

November 7, 2017

Condition Monitoring Expert Tip #4 by Mobius Institute This tip is sponsored by IMVAC (International Machine Vibration Analysis Conference) There is no doubt that technologies such as vibration analysis, oil analysis, ultrasound and infrared are very powerful. They can tell you a great deal about fault conditions in rotating machinery, electrical systems, and more. But if […]

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How to Determine a Vertical Pump’s Natural Frequency

August 29, 2017

There are two commonly used testing methods to determine a vertical pump’s natural frequency. The first method is called a startup or coast down. In order to perform this method a tach signal is required for the speed to be tracked.  The pump is started and the amplitude and phase are recorded during start-up and […]

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