System 1 Tips Tricks Vol3 Issue 4 Apr 2012 Collect Slow Roll Data


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System 1 Tips Tricks Vol3 Issue 4 Apr 2012 Collect Slow Roll Data

  1. 1. April 2012, Volume 3, Issue 4 BENTLY NEVADA™ SYSTEM 1® TIPS & TRICKSDear System 1® User,In this issue, we’ll show you how to collect slow roll reference data. Slow roll data is collected from proximityprobes observing a rotating shaft when the rotational speeds are too slow to contribute any meaningful rotor-dynamic effects in thesignal. Using slow roll reference data can be helpful when diagnosing a machine issue. It lets you remove unwanted runout to get abetter picture of the machine at running speed, but this technique should be used with caution. At the end of this article you will finda link to an Orbit article describing the use of slow roll data in detail.We hope you enjoy this issue!Sincerely,Your North America FAE teamThis month’s tip by: Michael Thevanh, Field Application Engineer, Houston, TXVersions: User Level:All Power User Diagnostic UserApplies to: IT GroupSystem 1 Plots / Tools Mid Level User Occasional User New User Collecting Slow Roll Reference Data1 To collect slow roll data, the machine should be operating below 300 RPM 1. Open the System1 Enterprise and Display. 3. If “Collection Groups” is not visible, go to “View” → “Collection Groups” 5. Select “Data Collection” → “Collect Reference Data” 4. Select the Collection Group you want to collect the slow roll data for and Right click 2. Click the Collection Groups tab
  2. 2. 2 2. In the “Mark Sample As” box, enable “System Default” if you are using this reference dataset in Decision support 1. Give your dataset a meaningful Dataset Name (No spaces or special characters) and Description 3. Click “OK”3 Using your dataset for compensation 1. Open up an Orbit Plot 2. Right click on the plot and select “Set Compensation” → “Select Reference Sample”
  3. 3. 4 1. Select Reference Sample listed in the Dataset Manager 2. For paired and full spectrum plots, you can specify Reference Dataset for each primary and secondary variable 3. Click “OK”5 This is the compensated plot (highly exaggerated to show the effects) Link to slow roll compensation Orbit Article
  4. 4. DID YOU KNOW?In January 2011, GE acquired SmartSignal, a company you know as a provider of predictive diagnostic softwareand monitoring services. SmartSignal software is used to anticipate, prevent and avoid equipment failure. But, as aBently Nevada System 1® user, how does this new development affect you?The SmartSignal solution can significantly “turbo charge” your investment in System 1. It quickly analyzes dataand identifies equipment that is at risk. It filters your data accurately and earlier in the degradation of equipment,giving you more time to take actions to mitigate an impending failure. This solution applies to all critical equipment,both rotating and non-rotating, across all OEMs. Click here to get more information on the SmartSignal or Betteryet, register below for the SmartSignal Webinar on 18 July!!Bently Nevada Technical Support:bntechsupport@ge.com775-215-1818Bently Nevada website: 1 Blog (You’ll need to join the forum):