IRD Balancing 258 User Manual
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IRD Balancing 258 User Manual

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Model 258
User Manual Part No. ED48618 - Revision A
User Manual
Copyright © 2006

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Summary of Contents for IRD Balancing 258

  • Page 1 Model 258 User Manual Part No. ED48618 - Revision A User Manual Copyright © 2006...
  • Page 2 IRD Balancing, LLC Headquarters for IRD Balancing USA: 4740 Allmond Avenue, Louisville, KY, 40209,Tel:1(502)366-0916, Fax: 1(502)238-1001 Sales and Suport for IRD Balancing USA: 651-A Lakeview Plaza Blvd.,Worthington, OH 43085, Tel:1(614)431-5256, Fax:1(614)238-1001 For technical support, contact:support@irdbalancing.com Europe: Unit 4J, Brymau Three Estates, River Lane, Saltney, Chester, CH4 8RQ, England, Tel: +44 (0) 1244-682222, Fax: +44 (0) 1244-677977 Mexico: Miguel G.
  • Page 3 RETURN PROCEDURE pay shipping charges to IRD Balancing, return shipping charges shall be covered by IRD Balancing. To return a product to IRD Balancing please contact our customer service The above mentioned warranty does department, they will issue a RMA...
  • Page 4 This page intentionally blank.

  • Page 5: Table Of Contents

    How to Set System “Control Panel” Settings 1-16 Machinery Balancing Module Model 258 Balancing Overview ..... Single-Plane Balancing Overview....How to Set Up the Model 258 for a Single-Plane Procedure ............How to Perform a Single-Plane Procedure .. Two-Plane Balancing Procedure Overview.. 2-21 How to Set Up a Two-Plane Procedure..

  • Page 7: Introduction To The Model 258

    User Manual Conventions As you use this manual, you'll discover certain conventions used: Bold type is used to indicate text that appears in a Model 258 menu or data screen. Italics are used to emphasize important information.

  • Page 8: The Model 258 Handheld

    Model 258. Chapter 3, Analyzer Module - Describes how to set up and perform FFT analysis and phase measurements on the Model 258. Chapter 4, Bump Test Module – Describes how to set up and perform bump tests (also known as hammer tests) using the Model 258.
  • Page 9 The Model 258 has a high resolution, supertwist, color graphic liquid crystal display (LCD). When you first turn on the Model 258, the IRDtitle screen initially displays, showing your device’s firmware version number. After a few seconds, the Model 258 automatically displays its Home screen showing the available operating modes.
  • Page 10 Help Mode On the Home screen, select the Help icon (?) to access the Model 258’s help feature, or, from other screens, press the Help function button to access the Model 258’s context sensitive help. The help screen displays and the help topic associated with your current Model 258 activity highlights.
  • Page 11 Press and hold the 0 / up arrow button, alternate functions display. Arrow Buttons The four buttons in the center of the Model 258 are identified as the up, down, left, and right arrow buttons. Use of these buttons depends on your activity: Home Screen –...
  • Page 12 Introduction to the Model 258 battery status current time Figure 1 - 4. The Home Screen. Setup Screens – In a setup screen, use the up/down arrow buttons to highlight the field whose setting you wish to change. With the desired field highlighted, use the right/left arrow buttons to open/close the field, displaying its available settings.
  • Page 13 Introduction to the Model 258 The Model 258 Handheld message area prompt area Figure 1 - 5. The Analyzer Module’s Setup Screen. Beneath setup fields, setup and data display screens provide a message area and a prompt area that display messages/prompts relative to the current activity.
  • Page 14 Printing Model 258 Screens Using the Keypad The Model 258 enables you to print the current display screen using its RS232 connector, its IrDA port (for printers with IrDA support), or to save display screens as graphic files to its internal disk for printing or use on a host computer.
  • Page 15 Power Adapter/Battery Charger in a poorly ventilated area, as overheating may occur. Install and Charge the Model 258 Battery Prior to using the Model 258 for the first time, place the Lithium-Ion battery pack (BP-8) in the device and charge the battery for a Model 258...
  • Page 16 You can operate the Model 258 from the external power adapter/battery charger while waiting for the battery to charge. Once the battery is fully charged (or the Model 258 is connected to the Power Adapter/Battery Charger), it is ready for operation. Battery Life Primary power for the Model 258 is provided by battery packs.
  • Page 17 If the instrument is running from battery power only, removing the battery causes the Model 258 to shut off power to the LCD display and to PC cards. The Model 258 may lose any data stored in RAM. To avoid these problems, use the following procedure to replace the battery pack in an active Model 258 running on battery power: •...
  • Page 18 Not all application modules support the Y input or the trigger input. Power/Trigger/USB Connector To charge your Model 258’s batteries, connect the Power Adapter/Battery Charger to the unit’s Power connector. When power is being supplied to the unit, this connector is available for USB communications with the host computer using the supplied the splitter cable.
  • Page 19 Model 258 using ActiveSync, and Conformance Check surveys along with Analyzer, Bump Test, and Recorder analysis data stored on the Model 258 may be copied (backed up) to a host computer using ActiveSync. To download a free version of Microsoft ActiveSync, and for details on how to use ActiveSync, contact the Microsoft Corporation via their website at www.microsoft.com.
  • Page 20 Model 258. How to Perform a Hard Reset To hard reset your Model 258: • With the Model 258 OFF, unscrew the battery cover on the back of the unit. • Using a 1/16...
  • Page 21 Introduction to the Model 258 The Model 258 Handheld Model 258 Specifications Environmental CSA and FM: Class I, Division 2, Groups A, B, C, D CE Rated IP Rating: IP 65 Temperature Range Storage: -20°C to +60°C (-4°F to +140°F) Temperature Range Operating: -10°C to +50°C (+14°F to +122°F)

  • Page 22: How To Set System "Control Panel" Settings

    Introduction to the Model 258 How to Set System “Control Panel” Settings Overview This section describes Control Panel mode options that determine various Model 258 measurement setting defaults and system preferences. To access the Control Panel screen: • From the Home screen, use the left, right, up, and/or down arrows to select the Control Panel option.
  • Page 23 When ActiveSync synchronizes data between the Model 258 and PC, it synchronizes the date / time on the Model 258 to the PC’s date / time. To prevent the date / time being set incorrectly, ensure the Model 258’s Time Zone setting match that of the PC.
  • Page 24 Home screen, all display text appears in the specified language. After specifying changes to Control Panel screen settings, press the OK function button to store your new settings in the Mod el 258. The Home screen re-display. 1 - 18...

  • Page 25: Model 258 Balancing Overview

    Buffered Outputs • Laser tachometer However, if a TTL trigger is not available, the Model 258 allows for an external analog trigger, with an appropriate trigger threshold. Single-Plane Balancing Overview Regardless of whether you are performing a single or two-plane balancing procedure, all balancing procedures progress through basic “runs”...
  • Page 26 (reference run readings). Input the trial weight amount and placement angle into the Model 258. 4 - Perform the Trial Run Spin - With the trial weight securely attached, start the machine again, and perform a trial run with the trial weight.

  • Page 27: How To Set Up The Model 258 For A Single-Plane Procedure

    Machinery Balancing Module How to Set Up the Model 258 for a Single-Plane Procedure 8 - Perform a Trim Run Spin - Start the machine and perform a trim run to verify the machine is balanced within tolerances. If not, additional trim runs may be performed.
  • Page 28 • On the Model 258, select Balancing from the Home screen. The Balance Setup screen displays. Figure 2 - 2. The Balance Setup Screen.
  • Page 29 (from the shaft center to the position of the weight). Either mm, cm, m, inch, feet, EU. This information is used if you wish the Model 258 to estimate your trial weight for you.
  • Page 30 RMS detection. This replicates the measurement method used with older instruments, allowing newer Model 258 recorded values to remain equivalent. 2 - 6 Model 258...
  • Page 31 Machinery Balancing Module How to Set Up the Model 258 for a Single-Plane Procedure Detection options include Peak, Pk-Pk, and RMS. The default setting is Peak for acceleration and velocity, and Peak- to-Peak (Pk-Pk) for displacement. Number of Averages – Specify the number of spectral averages to be included in the measurement.

  • Page 32: How To Perform A Single-Plane Procedure

    How to Perform a Single-Plane Procedure After setting up your balance measuring equipment, and setting the Model 258’s balancing measurement parameters, you are ready to perform the single-plane balancing procedure. Perform the Reference Run To begin the single-plane balancing procedure: •...
  • Page 33 The Add Trial Weight Screen. • Stop the machine. • On the Model 258, enter the Mass, Angle and Radius for the trial weight you are attaching to the machine. A negative number can be entered if trial weight is removed, instead of added.
  • Page 34 30% change in magnitude, or a 30 degree change in phase, or both). With the 30/30 rule satisfied, the Model 258 uses differences between the reference run readings and trial run readings to compute the influence coefficient, which it uses to compute the permanent correction weight solution.
  • Page 35 (or select Yes if you plan to leave the trial weight attached). The Correction Weight – Solution screen displays. Add the Correction Weight Figure 2 - 8. The Correction Weight - Solution Screen. Model 258 2- 11 User Manual...
  • Page 36 Angle (1) / Angle (2) – Applicable only if you split weights. Allows you to specify the placement angle for the two weights. Both angles must be specified for weight recalculation. The Model 258 recalculates the weight for each position based on the relative phase between the correction weight and the split weight locations.
  • Page 37 • From the Correction Run screen, press an Enter button to proceed. You are prompted whether you wish to perform a trim run. Model 258 2- 13 User Manual...
  • Page 38 1 Weight - Solution screen displays the trim weight data (or select No to end the balance job). If Necessary, Attach a Trim Weight Figure 2 - 11. The Trim 1 Weight - Solution Screen. 2 - 14 Model 258 User Manual...
  • Page 39 Balancing Data Summary Screens The Summary function button is available from all balancing screens. • Press the Summary function button to display your procedure’s Vibration Summary Table. Figure 2 - 12. The Vibration Summary Table Screen. Model 258 2- 15 User Manual...
  • Page 40 All weights used in your balancing runs list with an adjacent check box. To select the weights you wish to combine: • Use the arrow keys to highlight the weights you wish to combine and press the Select function button to select (or 2 - 16 Model 258 User Manual...
  • Page 41 How to Estimate Trial Weights At times, you may wish the Model 258 to calculate the trial weight for you. The Trial Weight Estimate is based on the criteria that the trial run centrifugal force does not exceed 10% of the bearing shaft load.
  • Page 42 To save your balancing job: • From any screen on which it is available, select the Memory function button. The Memory - Internal screen displays the names and dates of all previously saved balance jobs. 2 - 18 Model 258 User Manual...
  • Page 43 Go to ... screen. • Alternatively, during a balancing job, hold down the (0) key, a Go to function button displays. Press the Go to function button to display the job’s Go to ... screen. Model 258 2- 19 User Manual...
  • Page 44 • If necessary, resume the balancing procedure from this screen. Alternatively, you may simply reference the balancing data and press the Esc function button to quit the Balancing application. 2 - 20 Model 258 User Manual...

  • Page 45: Two-Plane Balancing Procedure Overview

    Stop - First, with the machine stopped, set up the balancing equipment and mark your tachometer reference point on the rotor or shaft. Use Model 258 Setup menu options to configure balancing measurement parameters for the balancing run sequence. 2 - Perform the Reference Runs (Planes 1 and 2) Spin - Start the machine and perform two reference runs (initial runs), one on each balancing plane.
  • Page 46 “trim” weight that can be added to further balance the plane. 8B - Perform a Correction Weight Run on Plane 2 Spin - Perform a Correction Run on Plane 2. 2 - 22 Model 258 User Manual...

  • Page 47: How To Set Up A Two-Plane Procedure

    Setup options specific to two-plane procedures are detailed below. Reference the How to Set Up the Model 258 for a Single-plane Procedure section for all other settings that apply to both single and two-plane balancing. Model 258...
  • Page 48 CH1. For two-plane balancing with two sensors, set one plane’s sensor as CH1, the other plane’s sensor as CH2. Coupling – (Reference the above <Plane> field description.) Determines the type of signal acquired for the sensor(s). Options are: 2 - 24 Model 258 User Manual...

  • Page 49: How To Perform A Two-Plane Procedure

    How to Perform a Two-Plane Procedure After setting up your balance measuring equipment, and setting the Model 258’s balancing measurement parameters, you are ready to perform the two-plane balancing procedure. Perform the Reference Runs To begin the two-plane balancing procedure: •...
  • Page 50 Machinery Balancing Module • Verify the sensor and press OK. The Model 258 initiates the reference run measurements for Plane 1. The Initial Run – Plane 1 screen displays the measurement results. Figure 2 - 19. The Initial Run – Plane 1 Screen.
  • Page 51 From the Initial Run – Plane 2 screen, press an Enter button. The Add Trial Weight – Plane 1 screen displays. Figure 2 - 21. The Add Trial Weight – Plane 1 Screen. • Stop the machine. Model 258 2- 27 User Manual...
  • Page 52 Machinery Balancing Module • On the Model 258, enter the Mass, Angle and Radius for the trial weight you are attaching to Plane 1. A negative number can be entered if trial weight is removed, instead of added. Trial weights are typically attached at zero degrees.
  • Page 53 Typically, select No, as you typically plan to remove the temporary trial weight (or select Yes if you plan to leave the trial weight attached). The Add Trial Weight – Plane 2 screen displays. Model 258 2- 29 User Manual...
  • Page 54 • Stop the machine. • On the Model 258, enter the Mass, Angle and Radius for the trial weight you are attaching to Plane 2 (typically the same weight used on Plane 1). A negative number can be entered if trial weight is removed, instead of added.
  • Page 55 From the Trail Run 2 – Plane 1 screen, press an Enter button to proceed. You are prompted to verify the sensor is attached to the bearing nearest Plane 2. • Verify the sensor and press OK. The Trial Run 2 – Plane 2 screen displays. Model 258 2- 31 User Manual...
  • Page 56 Typically, select No, as you typically plan to remove the temporary trial weight (or select Yes if you plan to leave the trial weight attached). The Correction Weight - Solution screen displays for Plane 1 of 2. 2 - 32 Model 258 User Manual...
  • Page 57 • Use the Plane field to view each Plane’s correction weight data. Model 258 2- 33 User Manual...
  • Page 58 Plane 2. • Verify the sensor and press OK. The Correction Run – Plane 2 screen displays, , showing the amount of residual unbalance on Plane 2 with the correction weights attached. 2 - 34 Model 258 User Manual...
  • Page 59 You are prompted whether you wish to trim the residual unbalance. • If necessary, select Yes to proceed with trim runs. The Trim 1 Weight - Solution screen displays the trim weight data (or select No to end the balance job). Model 258 2- 35 User Manual...
  • Page 60 Verify whether the amount of residual unbalance is within specifications. • From the Trim Run – Plane 1 screen, press an Enter button. You are prompted to verify the sensor is attached to the bearing nearest Plane 2. 2 - 36 Model 258 User Manual...
  • Page 61 When you press No to the “Trim Residual?” prompt, the Vibration Summary Table automatically displays a summary of your job’s balancing data. Model 258 2- 37 User Manual...

  • Page 62: Static-Couple Balancing Procedure Overview

    In as such, on the Model 258, the static-couple procedure is identical to the two-plane procedure except Correction Weight and Trim Weight screens show three correction weights for the static- couple procedure: •...

  • Page 63: How To Set Up A Static-Couple Procedure

    (or four if you split the static weight), all static-couple balancing run procedures are identical to the two-plane balancing procedures. Reference this appendix’s How to Perform a Two- Plane Procedure section for details. Model 258 2- 39 User Manual...

  • Page 65: Analyzer Module

    FFT spectrum and phase analysis purposes. After data collection, the measurement’s data may be stored in the Model 258 for future review, and can be transferred to the host computer in comma separated value format (.csv) for import and analysis into the Analysis and reporting module or spreadsheet applications such as Microsoft Excel.
  • Page 66 Review Data – Initiates the Analyzer – Review Data screen allowing you to review saved measurement data. • From the Analyzer menu, select Setup,. the Analyzer - Setup screen displays. 3 - 2 Model 258 User Manual...
  • Page 67 (mV) per Engineering Unit (EU). Y-axis units – Derives the measurement type and units. Options include Accel G, Accel m/s , Vel IPS, Vel mm/s, Disp µm, Disp mil, Disp thou, gE (enveloped acceleration), Time. Model 258 3- 3 User Manual...
  • Page 68 Performing an Analyzer Measurement • From the Setup screen, press the Start function button to begin data collection. The Analyzer – Taking Data screen displays the FFT spectrum and, if specified, the comparative phase reading. 3 - 4 Model 258 User Manual...
  • Page 69 Figure 3 - 3. Example of an Env. Acc. Measurement’s Analyzer Display. With exponential averaging, the Model 258 continuously averages readings to minimize the noise level. Press the Pause function button to pause the acquisition process, then press Start to continue acquisition.

  • Page 70: Saving Analyzer Spectra

    Example of an Enveloped Acceleration (gE) Analyzer Display. Saving Analyzer Spectra • From the Analyzer – Taking Data screen, press the Save function button to name and save the current Analyzer measurement results for later review 3 - 6 Model 258 User Manual...
  • Page 71 Analyzer spectra are stored in comma separated value format (.csv) in the Model 258’s Mobile Device/Internal Disk/Analyzer folder. These .csv spectra files may be viewed with the Model 258’s Analyzer module, or may be copied to the host computer and viewed with Microsoft Excel or other analysis software.

  • Page 73: Bump Test Module

    If a spectrum is taken while the object is vibrating due to the impact, spectral peaks result, pinpointing the object's natural frequencies. The Model 258 can be used to capture this vibration response and to display a spectrum showing the resonant or natural frequencies.
  • Page 74 Review Data – Initiates the Bump Test – Review Data screen allowing you to review saved bump test data. • From the Bump Test menu, select Setup, the Bump Test - Setup screen displays. 4 - 2 Model 258 User Manual...
  • Page 75 Filter – The drop-down list displays High-pass filter settings. (Typically 2 Hz) Freq Range (Fmax)– Use the alphanumeric keypad to enter the FFT upper full-scale frequency, up to 40,000 Hz (2,400,000 CPM). (Typically 1000 Hz for normal machinery speeds) Model 258 4- 3 User Manual...
  • Page 76 (typically 400 lines). Avg. Type – (Pk Hold or Exponential) For bump tests, specify Peak Hold averaging. The Model 258 holds the highest spectral peak for each hammer hit. For exponential averaging, the Model 258 averages multiple hits to minimize the noise level, however, you must pause the averaging process after the last hit.

  • Page 77: Saving Bump Test Data

    Bump test spectra are stored in comma separated value format (.csv) in the Model 258’s Mobile Device/Internal Disk/Analyzer folder. These .csv spectra files may be viewed with the Model 258’s Bump Test or Analyzer modules, or may be copied to the host computer and viewed with Microsoft Excel or other host application.

  • Page 78: Glossary Of Terms

    Condition Monitoring - Determining the condition of a machine by interpretation of measurements taken either periodically or continuously while the machine is running. CPM - Cycles per minute. CPS - Cycles per second. Also referred to as Hertz (Hz). Glossary Model 258 User Manual...
  • Page 79 Keyphasor Phase Reference Sensor - A signal used in rotating machinery measurements, generated by a sensor observing a once-per-revolution event. (Keyphasor is a Bently-Nevada trade name.) Linear Averaging - In a DSA, averaging of time records that results in reduction of asynchronous components. Model 258 Glossary User Manual...
  • Page 80 Sensitivity - The ratio of magnitude of an output to the magnitude of a quantity measured. Also the smallest input signal to which an instrument can respond. Sensor - A transducer that senses and converts a physical phenomenon to an analog electrical signal. Glossary Model 258 User Manual...
  • Page 81 Magnitude of cyclic motion; may be expressed as acceleration, velocity, or displacement. Defined by frequency and timebased components. Waveform - A presentation or display of the instantaneous amplitude of a signal as a function of time. Model 258 Glossary User Manual...

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