March 2000

Rotating Equipment/Instrumentation

Effective machinery monitoring: getting the most for your investment

Here's why, when, where and how to make the effort

Sela, U., Sequoia Engineering and Design Associates

Design of many machinery monitoring systems relies on four implied assumptions. These assumptions are not necessarily spelled out, but nevertheless such concepts have influenced the design of most process machinery monitoring systems. These concepts lead to designs that often fail to achieve their objective because plant operators have been left out of the picture. Thus – instead of discussing Fourier transforms or the beauty of a Nyquist plot – why, when, where and how a plant should spend the effort and investment to monitor process machinery will be clarified. The four implied assumptions are: Careful machinery vibration monitoring is sufficient to yield substantial retu

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