Vibration Analysis ISO CAT III

Introduction

If you’re ready to become a senior vibration analyst, capable of diagnosing all common fault conditions and leading Category I and II analysts, then this is the course for you.

The Category III course is designed for experienced professionals who are already confident with spectrum analysis and wish to advance further. You will deepen your understanding of signal processing, time waveform and phase analysis, cross-channel testing, machine dynamics, and fault correction. This course is ideal for those looking to lead a condition monitoring program or team.

You will learn to diagnose a wide range of faults in rolling element and sleeve bearing machines using a variety of techniques, including spectral analysis, high-frequency detection methods, time waveforms, and phase readings.

You will also explore machine dynamics—such as natural frequencies and resonance—learn how to perform resonance testing, and apply corrective actions. The course includes training on both single- and cross-channel measurement techniques using your vibration analyzer.

Upon completing the Category III course, you’ll be fully prepared to establish and manage a successful vibration analysis program and mentor junior analysts.

After the training, you can sit the certification exam with confidence. Successful candidates will be certified to ISO 18436-2 Category III through the Mobius Institute Board of Certification (MIBoC)—an internationally recognized body accredited to ISO/IEC 17024, the highest global standard in personnel certification.

Join the global community of Mobius-certified analysts and take the next step in your vibration analysis career.

Who should attend

This course is ideal for:

      • Individuals with CAT II certification and minimum 36 months experience

      • Experts operating or optimizing vibration analysis programs

      • Reliability or senior maintenance engineers

Benefits

There is a great deal to learn, but it will help you to perform your role with confidence. The topics covered in this course include:

  • Review of condition monitoring technologies and the ISO standards

  • Signal processing and data acquisition

  • Time waveform analysis

  • Phase analysis

  • Dynamics (natural frequencies and resonance)

  • Testing for natural frequencies

  • Operating Deflection Shape (ODS) analysis

  • Modal analysis and intro to FEA

  • Correcting resonances

  • Rolling element bearing fault detection

  • Journal bearing fault detection

  • Electric motor testing

  • Pumps, fans, and compressors

  • Gearbox fault detection

  • Corrective action

  • Running a successful condition monitoring program

  • Acceptance testing

  • Review of ISO standards

The key is that with the VCAT-III course, you will transition from being a vibration analyst who should be supervised to a person who is capable of running the program, being a senior consultant, solving difficult problems, and taking a leadership role.

Course Outline

TOPICS COVERED

Signal processing

  • Filters: Low pass, band pass, high pass, band stop
  • Sampling, aliasing, dynamic range
  • Signal-to-noise ratio
  • Resolution, Fmax, data collection time
  • Averaging: linear, overlap, peak hold, time synchronous
  • Windowing and leakage
  • Order tracking
  • Cross-channel measurements
  • Correlation and coherence

Time waveform analysis

  • Collecting data – ensuring you have the correct setup
  • When should you use time waveform analysis?
  • Diagnosing unbalance, misalignment, bent shaft, eccentricity, cocked bearing, resonance, looseness, and other conditions

Phase analysis

  • Collecting data
  • Bubble diagrams
  • Diagnosing unbalance, misalignment, bent shaft, eccentricity, cocked bearing, resonance, looseness, and other conditions

Dynamics (natural frequencies and resonance)

  • Natural frequencies and resonances
  • Mass, stiffness, and damping
  • SDOF and MDOF

Testing for natural frequencies

  • Run-up coast down tests
  • Bode plots and Nyquist (polar) plots
  • Impact and bump tests

Operating Deflection Shape (ODS) analysis

  • Can we prove the existence of a natural frequency?
  • Visualizing vibration
  • Setting up the job
  • Collecting phase readings correctly
  • Interpreting the deflection shape
  • Using Motion Amplification

Modal analysis and intro to FEA

  • How does modal analysis differ from ODS?
  • How does Finite Element Analysis (FEA) differ from modal analysis
  • A quick review of the modal testing process

Correcting resonances

  • The effect of mass and stiffness
  • Beware of nodal points
  • Adding damping
  • A ‘trial and error’ approach
  • A ‘scientific’ approach
  • Isolation
  • Tuned absorbers and tuned mass dampers

Rolling element bearing fault detection

  • Why do bearings fail?
  • Cocked bearing, sliding on the shaft or inside the housing, looseness
  • EDM and DC motors and VFDs
  • Bearing frequencies and what to do when you don’t have all the details
  • The four stages of bearing degradation
  • Ultrasound
  • High-frequency detection techniques
  • Shock Pulse, Spike Energy, Peak Vue, and other techniques
  • Demodulation/enveloping
  • Selecting the correct filter settings
  • Spectrum analysis
  • Time waveform analysis
  • Low-speed bearings

Journal bearing fault detection

  • What are journal bearings?
  • Measuring displacement
  • Introduction to orbit plots
  • Using your analyzer to acquire orbit plots
  • Introduction to centerline diagrams
  • Eccentricity ratio
  • Glitch removal
  • How the orbit changes with pre-load, unbalance, misalignment, instabilities, oil whir and whip

Electric motor testing

  • How do motors work?
  • Diagnosing a range of fault conditions: eccentric rotor, eccentric stator, soft foot, phasing, broken rotor bars, rotor bar, and stator slot pass frequencies
  • Motor current analysis

Pumps, fans, and compressors

  • Unique fault conditions
  • Flow turbulence, recirculation, cavitation

Gearbox fault detection

  • Spectrum analysis versus time waveform analysis
  • Wear particle analysis
  • Gearmesh, gear assembly phase frequency (and common factors)
  • Tooth load, broken teeth, gear eccentricity and misalignment, backlash and more

Corrective action

  • General maintenance repair activities
  • Review of the balancing process and ISO balance grades
  • Review of shaft alignment procedures

Running a successful condition monitoring program

  • Defining the program
  • Setting baselines
  • Setting alarms: band, envelope/mask, statistical
  • Setting goals and expectations (avoiding common problems)
  • Report generation
  • Reporting success stories

Acceptance testing

Review of ISO standards

 

 

 

 

 

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  • Duration
    5 days
  • Format
    Online / In-house / Public
  • Prerequisite
    None ( Who should attend?)
  • Certificate
    Issued by Mobius Institute, ISO 18436-2 & ISO 17024 accredited. Globally recognized.