Time Waveform Analysis A uniquely effective three-day course

An essential skill for experienced vibration analysts

Time waveform analysis is a powerful condition monitoring tool yet it is often misunderstood and as a result, underutilized. Even the most experienced vibration analysts will learn new techniques and have the opportunity to develop this essential analytical skill.

You will learn the relationship between the FFT spectrum and the time waveform and how different fault conditions can be diagnosed that would otherwise be missed using only FFT spectra, such as gearbox tooth faults, bearing faults, flow related faults, lubrication problems, misalignment, looseness, impacts and rubs. You will learn how the type and severity of the fault changes the signal shape in both amplitude and frequency. You will also learn how to set up your instruments for data collection, signal processing, alarms and special tests.

TWA

TWA TIME WAVEFORM ANALYSIS COURSE

Course Overview The Time Waveform Analysis (TWA) class is three days of instruction in the use of TWA to correctly diagnose machine faults that are difficult or impossible to detect and diagnose using FFT spectrum analysis. Attendees should be experienced in the use of data collection, FFT analysis, vibration instrumentation and software. Attendees will learn in a hands-on type of class how to set up and collect the time waveform correctly, how to analyze the data and determine machine faults and severity. Attendees will also compete in teams on case histories with actual data to practice their new skills and cement the knowledge they have gained during the class.

The listening

This uniquely effective three-day class is a combination of “Listening and Learning” with one common goal – enabling you to achieve a thorough and lasting understanding of all aspects of the time waveform (TW) from theory through application. The “Listening” – which takes up about 40% of the three-day class time – comes in Mobius’ familiar form of highly animated instructional modules that cover a variety of TW-related subjects ranging from the underlying principles (signal shapes and processing) to TW setup to analysis of the TW. The Mobius simulators will make complex signal processing, data acquisition and analysis topics easy to understand. You will be challenged with hands-on (and brains-on) exercises with real case history data to apply your new knowledge and build skills and confidence.

The highly-energized, lab exercises

In the second part of the class, you will be part of a three-person team. We will provide computers and software with the analytical tools like what you have at your work. You will be presented with real data from real case studies where real faults await your real diagnosis. You will need to think creatively to understand what the data is telling you and correctly diagnose the machine fault. To make things more interesting, your team will be pitted against the other teams in a spirited competition to correctly identify the machine fault and do it as efficiently (i.e. cheaply) as possible. The result is a highly effective learning environment and experience you’ll never forget.

Our public courses are conducted by an experienced, certified Mobius Institute instructor at Mobius Institute authorized training centers in 50 countries throughout the world. See the Mobius institute website at www.mobiusinstitute.com to see the courses scheduled in your area. All of our training courses are also offered at your site, so if you have several people to train, we can come to your location.

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Course Details Format: 3 days at a public course venue, where 40% is formal training and the remainder of the course is provided in a lab format, where teams will diagnose real machine problems in a highly effective and energized learning format

Optional: Examination, 70% passing grade (given at the end of the public course session)

CEUs: 3

Course Prerequisite: Typical certification level equivalent to ISO Category II is recommended but not required

Certification: A course certificate will be given to those who successfully pass the examination.

Outcome: You will come away from this course with a deep understanding of how to set up and collect the time waveform correctly, and how to analyze the data and determine machine faults and severity

Topics Covered • Time waveform and the FFT

o Signal shapes, impactso How faults affect the signal shapeo Modulation and beating

• The T-formulao Signal processing, sampling rates

vs Fmaxo Samples vs LOR, practical setupo Resolving frequencies on the time

waveform• Proper selection of sample rate, record length

and amplitude units• Fault detection and pattern recognition• Understanding beating, modulation and

distortion

• Fault conditions and their waveforms:o Gear faults, rolling element bearing

faults, misalignment, looseness,lubrication, impacts, rubs, cavitation, andturbulence.

• Time waveform analysiso Proper selection of amplitude units,

signal distortiono Amplitude modulation and beat

frequencies• The comprehensive approach to TWA

o Using the right tools for the right job• Lab exercises to develop skills through problems

and appropriate corrective action

TWA Course - Candidate Profile:

• You have at least two years of vibrationanalysis experience

• You want to be a more capable andconfident vibration analyst

• You want to become more proficient atanalyzing time waveform data

• You want to fully understand auto-correlation, circle plots and timesynchronous averaging

• You want actual experience properlysetting up and analyzing time waveformdata

• You want to test your knowledge throughanalysis and diagnosis of real machinedata and faults

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CONTACT MOBIUS TO LEARN MORE

Take your next step by contacting us. You can reach us by email at learn@mobiusinstitute.com or call us toll free in North America at (877) 550-3400 or worldwide at (+1) 615-216-4811.

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MOBIUS INSTITUTE is a worldwide provider of Reliability Improvement, Vibration Analysis and Precision Maintenance education for plant managers, reliability engineers and condition monitoring technicians, allowing plants to be successful in implementing reliability improvement programs through delivery of more easily understandable and comprehensive training of Reliability and Vibration Analysis via public, in-plant and online education programs. Since 1999, Mobius Institute has delivered superior education through its Crystal Clear™ methodology that uses innovative 3D animations and software simulations that make complex topics easier to understand. Mobius Institute has training centers in 50 countries and its certification body is ISO 18436-1 and ISO/IEC 17024 accredited.

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