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Analysis & Diagnostic Systems

Portable Vibration Analysis System  Kenjin

Product Overview

Kenjin is compact, lightweight and transportable

Making it an excellent choice for vibration analysis on plant assets without permanent analysis system, and also for acquisition of transient data during startup/shutdown. This system can save time and money due to ease of use.


  • Easy data acquisition during startup/shutdown, as well as in abnormal conditions.
  • Abnormal machine conditions are easily identified to help prevent damage and catastrophic failures.


· Compact, lightweight, transportable
Dimensions: 96 (W) × 224 (H)×163 (D) mm Weigth: 2.6 Kg
· Instant setup and on-site data analysis
This simple system is user friendly and efficiently provides the necessary information to analyze conditions of your critical assets.
· High-speed data acquisition
Fast data acquisition intervals of trend data 0.1 sec and waveform data 0.1 sec.
(Time may vary, depending on the number of inputs and FFT lines.)
· Sophisticated data analysis and various graphs
The software provides a variety of analytical graphs which are optimized for the type of machinery and condition, satisfying stringent demands of vibration analysts and plant personnel.
· User-friendly operability and plotting functions
Intuitive software interaction with drag & drop display manipulation, graph area switching tab, etc.

System Configuration

Ability to connect to existing vibration monitoring systems using buffered outputs make Kenjin a perfect solution for any plant.


Steam turbines, Gas turbines, Hydro turbines Electric generators, Feed pumps, Fans, Blowers, Compressors, BOP machinery, Rotating equipment critical to your facility

Data Display Examples

· Polar Plot
This shows the vibration vector at the time of critical startup/shutdown of the machine. From this plot, the user can observe the balancing condition, vibration levels and critical speed during the startup/shutdown of the machine.
Displayed data (Switchable display): 1X, 2X
This allows over lay of current data on top of past data.
· Waterfall Plot
This plot is used to analyze changes in frequency components that occur over time.
Cascade plot can also be displayed with width (z-axis) as rotation speed to analyze changes in frequency components in relation to changes in rotation speed.
· Trend Plot
This plot displays short term and long term chronological changes using a line chart.
Displayed data (multiple selections are allowed): Rotation speed, GAP, OA, 0.5X amplitude, 0.5X phase, 1X amplitude, 1X phase, 2X amplitude, 2X phase, Not-1X amplitude, nX1 to nX4 amplitude and phase, Smax amplitude, various alarm setting values.
· Campbell Plot (optional)
With horizontal axis as rotation speed and vertical axis as vibration frequency, the graph displays straight lines of individual orders emanating from the origin, as well as circles of amplitude proportional to the amplitude level. This plot is used to analyze rotation speed to vibration level relationship and frequency change, and to visually determine whether or not the series of vibration aligns with a specific order or specific frequency component.
· Orbit and Waveform Plot
This plot composes signals from each X and Y sensor and displays the dynamic motion of the center of a rotating shaft.
The Orbit plot helps to identify any abnormal status including imbalance, misalignment, oil whirl and oil whip.
· Bode Plot
This plot displays the amplitude and phase in separate graphs with rotation speed used as the horizontal axis.
From this plot, the user can see the vibration status and critical speed during the startup/shutdown of the machine.
Displayed data (Switchable display): 1X, 2X
This allows over lay of current data on top of past data.

Case Studies

· Unbalanced Vibration
The most common abnormal vibration is due to the mismatch between shaft center and mass center, due to manufacturing error or machine components missing.
The characteristic of the vibration generates the rotation synchronous component (1X), which is sine wave or similar. Vibration becomes largest at critical speed.

  • S-V Plot

  • Spectrum Plot
· Oil Whirl Vibration
Self-excited, unstable vibration typical for sleeve bearing supported rotating machinery. Possible causes include effects from the shape of the sleeve bearing, oil film characteristics, etc. Normally, this vibration appears at two or less times lower the critical speed, and the frequency is around half the rotation synchronous frequency (0.5X).

  • S-V Plot

  • Spectrum Plot
· Misalignment Vibration
Vibration that occurs when the shaft centers of driving rotating machinery and its associated driven rotating machinery are not properly aligned. Typically the vibration includes rotation synchronous frequency component (1X) and harmonic components (2X, 3X).

  • Orbit & Waveform Plot

  • Spectrum Plot

  • Orbit & Waveform Plot

  • Spectrum Plot

· Loss of Rotor Component
When a piece of rotor component is lost/flies off, unbalanced vibration condition suddenly changes. The typical phenomenon includes sudden changes in the amplitude and phase angle (vibration vector) of the rotation synchronous frequency component (1X).

Polar plot

User-friendly Operability

infiSYS RV-200 (hardware & software) has a simple user interface, that is easy and instinctively operated by most plant personnel.
Quick learning of graphic display.

· Drag & Drop
From tree at left to display area at right, desired plots can be displayed anywhere you want.
· Tile Display
Instant pickup of desired channel plot from tile display window. Channel plot specific window opens with one click.
· Page Switching Tab
Desired graph display page can be displayed simply by switching the tabs. A step to create a new page is also simple. (Up to 20 pages.)

Product Catalog

  • Portable Vibration Analysis System  Kenjin
    Portable Vibration Analysis System  Kenjin


Series Model Name Specification Sheet
Kenjin Kenjin System Download (PDF)
KJ-2000B Portable Data Acquisition Unit Download (PDF)
XJ-2100 Software Download (PDF)

TEL:81-3-3263-4411 FAX:81-3-3262-2171

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