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Do Not Click mouse to advance Slides. Press PAUSE To Hold Any Slide. GHI “ ProCAT ”. The Lowest Cost 8 Channel Analyzer Tailored With All Needed Functions To Increase Your 6DOF Productivity. This Delays the slide. Subjects For Your Consideration. The Basic Rules Of Defect Precipitation

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ghi procat

Do Not Click mouse to advance


Press PAUSE To Hold Any Slide


The Lowest Cost 8 Channel Analyzer Tailored With All Needed Functions To Increase Your 6DOF Productivity

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subjects for your consideration
Subjects For Your Consideration
  • The Basic Rules Of Defect Precipitation
  • Why 6DOF Users Need Spectrum Analyzers
  • Description Of ProCAT
  • ProCAT’s Competitive Advantages
  • Lowest Priced 8 Channel Analyzer
  • Ease Of Use
  • Key Features
  • The ProCAT Configurations

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rules of defect precipitation
Rules Of Defect Precipitation

The following slides describe the Basic Rules of

defect precipitation. The are the “Golden Rules”[1].

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1 if you re not stressing the flaw you re wasting your time 1
#1 If You’re Not Stressing The Flaw, You’re Wasting Your Time.[1]
  • Basic Physics – Components Accumulate Fatigue Through Vibration @ their self-resonant frequency Fr.[2]
  • Basic Screening Requirement – Accumulated Fatigue Must Exceed Flaw Fatigue Limit @ Fr.
  • Input Energy MUST Match Flaw Susceptibility - Type, Rate, & Resonant Frequency Fr.
  • Input Energy Must Reach Potential Flaws To Make Them Fail
  • Flaws Not Under Critical Stress Have “Infinite Life”
  • There is no Guarantee Input Energy Will Reach Flaw Sites – Job 1 is to Determine if it Does at an Input Energy That is Above a Critical Level.
  • A Screen is Faster if Excitation is Uniform Since Fewer Steps at Increasing Stress Levels Will be Needed.

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2 what you don t know can ruin your screen 1
#2 “What You Don’t Know CAN Ruin Your Screen”[1]
  • Knowledge of Product Response is Essential
  • Stress Transmission Paths to The Flaw Site Control Screening Effectiveness
  • Thermal & Vibration Surveys are VALUE-ADDED Development Tools
  • Surveys Help Match PRODUCT RESPONSE With INPUT ENERGY Characteristics
  • As a Rule, PRODUCT RESPONSE Spectrums MUST be ENVELOPED by the INPUT ENERGY Spectrum
  • Survey Data Applies to More than One Product Type

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3 mother nature always sides with physics 1
#3 “Mother Nature Always Sides With Physics”[1]
  • Reasons Stress Characteristics Don’t Match Product Response:
  • Test Machines Have Distinct LIMITATIONS Due to Combinations of Two Principles:
    • Thermal Change Rates TOO Slow or TOO Fast –
    • Insufficient Thermal Stress at Flaw Sites
    • Vibration Holes or Spikes in Input Spectrum in Relation to Table/Fixture Position –
    • Too Little or Too Much Stress at Both Flaw and Non-Flaw Sites

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5 there are no magic facilities or methodologies 1
#5 There Are NO Magic Facilities or Methodologies[1]
  • Facilities Can Only Accomplish What Physics Allows
  • Physics, Not Marketing, Determines Whether A Screening Chamber Can Provide Adequate Stress
  • It’s NOT a Case of “Turn-it-on-and-trust-me.”

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what spectrum analyzers do
What Spectrum Analyzers Do
  • Only Effective Means to Measure The Process
  • Verify If Hank’s Rules & Papoulis’ Law Are Met
    • In a Nut Shell, Since Fatigue Comes From Self Resonance, Determine If Product Resonances Are Sufficiently Excited
    • Help Identify Fixture Non-Uniformity of Transmission
    • Improve Screen Uniformity – Reduce Over And Under Stressing
    • Improve Your HALT/HASS Process, Increase Effectiveness
    • Determine Fatiguing Differences Between Facilities, Machines, Tables, Fixtures, and Products
    • Minimize $creen Time, Lower Co$t$

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much to learn from a psd
Much To Learn From A PSD

This illustration, PSDs from two different tables shows different effectiveness

RED - More Power For Low Resonant Frequency Products

Blue - More Power For High Resonant Frequency Products

Plot of power g2/Hz for band of frequencies to correlate with product fr frequencies..

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description of procat
8 Parallel Channels w/BNC Inputs Each With ICP Conditioning For Voltage Mode

Passive Fixed Cutoff AA Filters

FFT Math Uses PC Resources

32 KB Data Blocks Produce 16 K Line FFTs For 12.5 K Lines @ 0.7 Hz Line Resolution Plots

Stream To HD Mode For Post Processing

Easy Windows ICON Interface

Single Click Control

Waveform Plots With gRMS

PSD Plots With gRMS

Single & Quad Spectral Plots

PSD, FFT, Transfer Function with Coherence, & Fatigue Potential Analysis

Selectable Averaging

Spectrum Zooms For Hi Res Plots

Interchannel Overlays

Saved Spectral Signature Modes Track Changes

Save/Recall Spectrums From HD

Exports Spectrums in ASCII For EXCEL or Other 3rd Party Needs

Tower And Portable Versions

Description Of ProCAT

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procat s advantages
ProCAT’s Advantages
  • Very Low Price Per Channel
  • 8 Parallel Conditioned Channels
  • Easy Operation - Zero Training Needed!
  • 12.5 KHz Bandwidth with 0.7Hz FFT Line Resolution
  • Multiple Successive Zooms And Restores
  • Zoomed PSDs With Recomputed Narrowband gRMS
  • Only Analyzer With Fatigue DP(f) Function
  • Exports Data in EU’s Eliminating Converting
  • Desktop And Portable Versions
  • Specifically Tailored For HALT/HASS Machines
    • Everything you need, Nothing you don’t!

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lowest price channel
Lowest Price/Channel
  • 8 Ch in Desktop For Less Than $10K
  • Tailoring Makes A High Quality Analyzer Affordable
  • No Signal Conditioning To Buy For Voltage Mode ICP Sensors – (mV/g sensitivities)
  • Also Compatible With Current Mode Sensors
  • Includes 8 Ch Of Anti-Alias Filters

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easy to use easy to learn
Easy To Use – Easy To Learn
  • Windows™ Based – Menu Driven
  • Just Select A Desired Function And Click
  • Paint With Mouse For Zoom Plots
  • Simple Setup Table With Default Selections For:
    • Number Of Averages
    • Log - Log or Log - Linear Plots
    • Weighting Window Types
    • Channels To Overlay – With Common Grid & Cursor Readout
    • Channels For Transfer Function Analysis
    • Modes: Single Shot, Continuous, Or Streaming to Disk
    • Sensor Attributes And Programmable Gain w/Auto Scale Re-Setting

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the easy setup screen
The Easy Setup Screen

Most Are Default Settings, But May Be Changed

Streaming To Disk Settings Display Available Space On Disk, Selections For Total Streaming Time Or Number Of Files.

Plot Modes, Weighting Windows, Averaging, And Sensor Calibration Values And Engineering Units Are Set From This Screen.

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bandwidth resolution
  • 32 KB Data Block Produces 16 K Line FFT
  • FFT Line Resolution = 0.7 Hz
  • PSD, TF, DP(f) Frequency Resolution = 1.4 Hz
  • Display Bandwidth = 1 Hz to 12.5 KHz
  • 12.5 K Line Plots Zoomable Up To 25 Times For High Resolution 512 Line Bands
  • Zoomed Plots Are Auto scaled
  • Un-Zoomed Saved Files Are Zoomable After Recall

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paint to zoom plots
Paint–To–Zoom Plots
  • Eliminates Need For Setup Changes For Different Bandwidths or Resolution
    • Click And Drag - Paint Portion Of Spectrum To Any Desired Display Bandwidth
    • On Button Release – Painted Portion Fills Screen
    • Plot Axes Are Automatically Rescaled
    • New Narrowband gRMS Is Displayed
  • Operates on All Spectrums, Overlays, As Well As Recalled Files & Signatures

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special modes functions
Special Modes/Functions
  • Quad Overlay Plots
    • Shows Before/After Spectrums From Four Sensor Positions
  • Signature Mode -
    • Confirms Same Performance When Reproducing Test Setups
    • Tracks Wear, Validates Equality Between Different Machines –Tables or Fixtures
  • Streaming Mode -
    • Saves Long Term Environmental Data While Analyzing
    • Provides Post-Processing For Different Analysis After Recall
    • Records End Use Environments To Correlate EOL With HALT/HASS Levels
  • ASCII Export -
    • Output Spectral Data in Smoothed EXCEL Compatible Format

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procat s quad plot mode
ProCAT’s Quad Plot Mode

Four Of Any Spectra on One Display

All With Active Cursors, Independent Zoom Expansions And Readouts

Each May be Overlaid With Old Data or Data From Different Channels

For PSD’s and Damage Potential Spectra

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procat transfer function
ProCAT Transfer Function

Transfer Function is the difference, shown in spectral amplitude, between two input channels

One use is to show the transmission losses or gains through a fixture and at what frequencies

The Coherence plot at the bottom shows the phase relation between the input and output

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procat s damage metric
ProCAT’s Damage Metric

This Overlay Shows Fatigue Magnitude As Mag2/Hz For Each Flaw fr Frequency

Overlay Shows 2 Different Exposure Times, Different by Factor of 10

This is Seen in DP(f) Readout @ Same fr

fRMS Values Differ by Factor of Square Root of 10x Time Difference – 3.16



fRMS: #2 20.0 #2 65.9

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desktop system configuration
Desktop System Configuration

PCI Bus Cards, DAC and AA Filters Plus Sensor Conditioning

I/O Cables,

8 CH Input Box,

Auto-loading Software.

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portable procat configuration
Portable ProCAT Configuration

Self Contained Notebook

Based System

Optional 12V DC Operation

Optional SCSI HD

For Extended Recording Time And Archiving

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example of dp f use
Example Of DP(f) Use
  • DP(f) spectrums were measured from two 6DOF machines produced by the same manufacturer.
  • Both were running @ 10 gRMS.
  • Sensors were located at front-left quadrant locations on each table.
  • DP fRMS Indicated that machine #2 produced two times as much fatigue as machine #1, overall.
  • This suggests that screen time costs of machine #2 can be 1/2 those of machine #1 for the same screen results, and also that unless exposure time compensation is made, some products with critical fr may have different EOL.

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machine 1 vs machine 2
Machine # 1 vs Machine # 2

From two similar machines, same table locations, @10 gRMS.

Overall, #2 produces 2 times more fatigue than #1.

At 508 Hz, #2 produces 386X more fatigue than #1.

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why you need procat
Why YOU Need ProCAT
  • Improve $creen Program Re$ults, Improve Product Reliability, Cut $creening Costs, Vastly Improve EOL Uniformity of Your Products.
  • This Leads to:
    • Your Firm’$ Enhanced Overall Image of Technical $uperiority, Increa$ed Product Reputation,
    • Your Increased Personal Stature By Improving Your $creening Program’s Results
  • Add Your Name To The Growing List Of $atisfied Customers
    • Users Include: QualMark, Dell, DTI, Whirlpool, Seagate, Pierce

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  • Caruso, H., “The Golden Rules of Successful ESS,” 1st U. Of Maryland/GHI Systems Workshop for Repetitive Shock (RS) Machine Users, University of Maryland, 22 March 1995, Edited By Henderson, G.
  • Papoulis Law of Gaussianity Rome AFB.
  • Svensson, T., and Torstensson, H.. 1993, “Utilization of Fatigue Damage Response Spectrum in the Evaluation of Transport Stresses,” 1993 Proceedings, IES, Vol 2., pp. 191-194.
  • Henderson, G., and Piersol, A.G., “Fatigue Damage Related Descriptor for Random Vibration Test Environments,” Sound and Vibration, October, 1995, pp. 20-24.
  • Connon, S. “Methods of Combination of Spectra- Fatigue Damage Spectrum Method,” August 2002, IEST Meeting, Phoenix, AZ
  • Anon, Qualmark Sales Meeting, November, 2003, Denver, CO.

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thanks for looking at procat

Thanks For Looking At ProCAT




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