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Benstone Fieldpaq II User Manual

Dynamic signal analyzer
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FieldpaqⅡ Ⅱ Ⅱ Ⅱ Dynamic Signal Analyzer
User Manual
Edition: December, 2013
Benstone Instruments, Inc.- 32905 Northland Court- St. Paul, MN 55045
Telephone : 651-257-6500
www.benstone.com
Copyright ©2005,6 all rights reserved

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  • Page 1 FieldpaqⅡ Ⅱ Ⅱ Ⅱ Dynamic Signal Analyzer User Manual Edition: December, 2013 Benstone Instruments, Inc.- 32905 Northland Court- St. Paul, MN 55045 Telephone : 651-257-6500 www.benstone.com Copyright ©2005,6 all rights reserved...

  • Page 2: Table Of Contents

    Contents WELCOME ..........................4 SYSTEM CONTENTS ....................4 QUALITY CONTROL - CALIBRATION ................4 USING THIS MANUAL..................... 4 HELP..........................5 INTRODUCTION ........................6 LAYOUT OF THE FIELDPAQ Ⅱ Ⅱ Ⅱ Ⅱ ..................6 MAIN KEYPAD ........................ 7 FUNCTION KEYPAD ....................... 8 CONNECTORS........................
  • Page 3 4.19 NAVIG ATING THE DISPL AY OF WATERFALL PLOT ......53 4.20 ENVELOPE SCANNING ..................... 56 4.21 TOOLS ........................... 57 BALANCER PROGRAM ....................... 58 RUN BALANCER PROGRAM..................58 MAIN DISPLAY ......................58 EXIT ..........................59 PREFERENCE....................... 61 TOOLS .......................... 61 BALANCING .........................

  • Page 4: Welcome

    The Benstone Instruments Dynamic Signal Analyzer is very flexible. Your system may have come with only one software feature, but the FieldpaqⅡ is designed for easy upgrade of software features as needed by the user.

  • Page 5: Help

    1.4 Help Benstone Instruments wants to help you get the most from your system. If there is anything else we can do, please feel free to call or Email us. Telephone : 651-257-6500 Fax : 651-357-4004 Service or Calibration : support@benstone.com...

  • Page 6: Introduction

    2 Introduction This chapter gives a general introduction to the FieldpaqⅡ. It provides an overview of the layout, keypad, connectors and other hard ware features. Detail of the individual operation of each function will be described in later chapters Layout of the FieldpaqⅡ Ⅱ Ⅱ Ⅱ ò...

  • Page 7: Main Keypad

    main keypad ò Navigation keys – Use these keys to move a focus or a cursor in the following occasions : ¢ Move a cursor to left or right ¢ Move the focus in a list of options ¢ Select an active window ò...

  • Page 8: Function Keypad

    function keypad There are 4 function keys underneath the LCD screen. The function of each key is defined by the corresponding menu at the bottom of the LCD screen. Note : Most of the functions can be accessed by both the keypad and by clicking on the touch screen with your fingers.

  • Page 9: Turning On

    Turning On Press and hold the on/off key to turn on your FieldpaqⅡ. It takes several seconds to load the operational system, and then the instrument will show you the main display as follows. Double tap the icon to run a program Your display will show the icons of programs installed.

  • Page 10: Charging The Battery

    2.6 Charging the battery The FieldpaqⅡ is designed to run continuously up to 6 hours with a fully charged battery. When you turn on your FieldpaqⅡ, you can see the condition of the battery power gage at the lower right corner of the screen. To charge your FieldpaqⅡ, plug the connector of power supply to the DC connector of FieldpaqⅡ.

  • Page 11: Specification

    Specification Operating System Windows CE Number of Input Channels 2+2 analog channels and 1 aux channel BNC on 2 Input Channels, 6 pin Lemo on Auxiliary Channel, Connector Style 3 pin LEMO power supply and 4 pin LEMO triaxial input Channel Coupling AC, DC, IEPE Auxiliary Channel...

  • Page 12: Utility Program

    3 Utility Program Run the utility program from the main display of FieldpaqⅡ. This program allows you to review the system information, programs installed on this instrument and setting up the system parameters. Use “cancel” key to leave program. In the Utility software, there are three main menus : System Menu, Option Menu and Program List.

  • Page 13: Option Menu

    The FieldpaqⅡ has a built-in time lock for certain programs. If you have a demo version of a particular software, the time lock will display how much remaining time is left. If you need to get a demo program for evaluation, please contact Benstone Instruments for help.
  • Page 14 To install a new program or a demo program, you’ll have to get a key code from Benstone Instruments first. Then you can tap the “Install” button to conduct the installation which will guide you through the install process.

  • Page 15: Fft Program

    4 FFT Program 4.1 Run FFT program Move the focus to highlight the FFT software program, and then press [OK] to run this program. Or double tap the program icon with your finger to run this program. Navigating the displays The main display (below) shows the measured data in up to two windows, i.e., Pane A and Pane B respectively.
  • Page 16 Selecting an active window To select an active window, you can either use the keypads to select, or select by tapping the desired window directly. Using the Keypads Press Cancel key to make the title bar of the active window turn red. And then use the navigation keys to move the red focus to the desired window.

  • Page 17: Soft Key Menu : File

    4.3 Soft key menu : File File Management allows you to properly navigate the system to save, rename, and load files. Tap the file button on the screen or press F1 key to open the file menu. Press [cancel] key or tap the file button again to close the window. Exit : Exits this program.
  • Page 18 File Manager : The file manager is an utility to cut, copy, paste, delete new folder, or rename. File Manager-Edit menu : Pressing “Select All” will select all files in the directory or “Unselect” will unselect all files selected. After you have selected the files, you can cut, copy, paste, or delete the files into another directory if desired.
  • Page 19 Save Setup : Selecting Save Setup opens up a new window for saving the setup parameters into a file (.fs2). You can save the setup, rename the file name, or create a new directory as shown in the previous pages. Open Data : Selecting Open Data to open a saved data file as well as the associated setup parameters.

  • Page 20: Soft Key Menu : Setup

    Soft key menu : Setup The Setup menu has five submenus : Mode, Measurement setup, Channel setup, Engineering unit and Envelope. Each will be described in detail in the following sections. To enter a submenu, use the navigation keys to move right or left, and then press [OK] to enter the menu.

  • Page 21: Measurement Menu

    Envelope Scanning : The program performs envelope filter scanning for determining the best choice of envelope filter. 4.6 Measurement Menu : Setting up the measurement parameters Measurement Menu allows the user to select various parameters relating to the measurement and how to set up the measurement. Frequency Band : Band, Lines, Zoom, Start Frequency Average :Average type, Average number, Overlap, Preview, Overload/Reject Trigger : Trigger On/Off, channel, level, slope, delay %...
  • Page 22 Zoom : Select either On or Off. The Zoom FFT allows you to put the resolution lines in a specified band for greater resolution. Start Freq : Input the desired starting frequency of the Zoom FFT in the input box. You must have the Zoom FFT feature turned on to activate this feature. Select this by pressing the [OK] button of the [Navigation Keypad].
  • Page 23 Trigger : Type : Select Off, Ext, Ext, Ch 1, Ch 2, Ch 3 or Ch 4 to specify the desired input channel for triggering functionality. The trigger function is used to control the timing of data acquisition. If the trigger function is on, the system will always wait for a trigger signal to acquire data on the selected input channel.

  • Page 24: Channel Menu : Setting Up The Parameters Of Input Channels

    4.7 Channel Menu : Setting up the parameters of input channels Channel Setup Menu allows the user to select various parameters related to each channel. Channel On/Off selection, Input range, Coupling type, Window type, Force factor, Exponential factor Channel ID, Auto Advance, Advance number Select channel setup to define each channel according to what you are measuring.
  • Page 25 Definition of exponential function : x(t) = log (-Bt) Definition of exponential factor X : X = log (-Bt) at t = T, where T is the length of the time block. Actually X is the attenuation rate of the exponential window at the end of the time block.
  • Page 26 each other, so you can auto advance only the channels you wish to advance. Advance Number : Advances the number of Channel ID after you save the file. Channel ID for machines : You can define the channel ID by a combination of 3 hierarchy levels. The point ID helps you to identify the location and direction of your measurements.

  • Page 27: Engineering Unit Menu : Setting Up The Engineering Units

    4.8 Engineering Unit Menu Engineering Unit Menu : Allows the user to select various parameters that relate to the sensor type used, as well as the unit(s) displayed. Sensor Type, sensor Unit (SU) Sensitivity mV/SU Display unit (DU) dB reference (DU), Int/Diff, weighting, User defined unit Detection, HP Filter, Unit detection table The Engineering Unit menu allows the user to specify the type of sensor you are connecting to, the units to be measured, the units to be displayed and weighting...
  • Page 28 Sensitivity mV/SU : This is a user selectable input value. Enter the sensitivity of the device you are connecting to in the input box. Use the [Navigation Keypad] and enter the value via the keypad and press [OK] when complete. Display Unit (DU) : If you select Acceleration, and want to display velocity for example, you can select this here.
  • Page 29 Weighting : Select No, A, C, or default or User Define. A and C weighting is for acoustic measurements. Default weighting is an example of user defined weighting. You may edit the default weighting from a PC with Microsoft Notepad and save it with a different filename with extension name .xml.
  • Page 30 Unit Table : This is where information for each sensor type is stored. For example, the sensor unit for Acceleration can be defined as g, gal, and m/s . If you select g, then the available display unit values are g, gal, m/s , mm/s, in/s cm/s, mil, um.

  • Page 31: Envelope Setup

    4.9 Envelope setup Setting up the parameters of Envelope spectrum and select the bearing data from the bearing database. Envelope On or Off : Selecting Envelope On will enable the envelope spectrum measurements, which is used for bearing fault frequencies analysis. Because Envelope spectrum is calculated from Hilbert transform which takes over a lot of CPU time, this algorithm will slow down the realtime performance of your analyzer.
  • Page 32 For example, the power spectrum of a bearing which is at the early stage of outer race damage may look like the following plot. We may observe that there is vibration energy at the frequency band of 2.6kHz, 6.59kHz and 12.49 kHz, etc.
  • Page 33 The bearing database contains information of bearing fault frequencies. The standard bearing database contains only 500 bearings. You can edit your own database with the utility software provided by Benstone Instruments. FTF = Fundamental Train Frequency (frequency of cage) FTFO = Use FTFO when the outer race is rotating.

  • Page 34: Soft Key Menu : Display

    4.10 Soft Key Menu : Display Press the Display soft key to display the soft key menu. Selecting and navigating the displays have been discussed in the previous pages. In the following paragraphs, we will describe functions available for each function. Trace Setup : Select this option will display the trace setup menu for the active window.
  • Page 35 X-Unit : Select the unit of axis from Hz and RPM. X-Axis : Select to display the X axis in linear or log scale. Scale : Auto, Fix X, Fix Y, Full Scale, Zoom The Scale function allows you to change what is displayed. There are five functions with the Scale function, Auto, Fix, X, Fix Y and the Hot Key.
  • Page 36 HOT KEY for zoom in and zoom out By pressing the [Plus] key several times, you can zoom in on the x-axis 10 levels to quickly zoom in on a feature of interest. Note : [Plus] key zooms in the area centered by the cursor, and [Minus] key zooms out the scale.
  • Page 37 Hot Key of Cursor : By pressing the [dot] key, you will be able to toggle to each selection : Off, Single, Harmonic, Harmonic + Single, and Peak. Note : The type of cursor in use is shown with an icon in the status bar. Couple cursors : This function makes the cursors in two different data windows move together.
  • Page 38 BG Color : Select black or white back ground color for the data window. Bearing Frequency : Show or hide the bearing fault frequencies on the spectral plot. Add layout : Add a previously saved layout file to the list. Delete layout : Delete a layout file from the list.

  • Page 39: Trace Setup

    4.11 Trace Setup Select the Trace Setup icon to enter the menu of Trace Setup. From this menu you can setup the display format for the active window. You can press OK button or tap the arrow button on the left hand side of the window to display or close the Trace Setup menu.
  • Page 40 Complex Spectrum Sx(f) : This is also known as Linear Spectrum , which is derived from the Fourier transform of x(t) Note that spectrum is a complex function which has both real and imaginary part. Alternatively, it can be displayed in Amplitude and Phase, too. Due to the vectorial nature of linear spectrum, its averaged result may not be correct unless that the time data is synchronized by an appropriate triggering.When the phase data is not required, it is recommended to use the auto power spectrum.
  • Page 41 Coherence Hxy(f) : The coherence function is an indication function that describes the relation of two signal. Hxy(f) = (|Sxy(f)|)/(|Sx(f)| |Sy(f)|) The value of Coherence is between 0 and 1. When the two signal x(t) and y(t) is completely correlated, its value is 1.0. When the two signals are uncorrelated, the function is 0.

  • Page 42: Selecting The Type Of Y Axis From Trace Setup Menu

    4.13 Selecting the type of Y axis from Trace Setup menu Tap the icon or use the navigation keys to select the type of Y axis. The Y Axis functions will show what is available for each selected function. Function : Available selections for each function Spectrum : Linear, Log, dB, Real, Imaginary, Phase.

  • Page 43: Setting Up Data Traces Displayed In The Data Window

    4.14 Setting up data traces displayed in the data window One data window can show up to four data traces at one time, so there are four trace buttons in the menu bars. You have the option to turn off some of the traces or to assign a channel to perform a trace independently, i.e., only look at Channel 2, for example.

  • Page 44: Soft Key Menu : Tools

    4.15 Soft key menu : Tools The Tools menu contains several useful utilities, including IEPE check, TTL Out, RPM ON, Time in DU, Note, Calibration, and cursor marking. IEPE Check This function help to check the power and the bias voltage of your IEPE sensors’...
  • Page 45 Select “Power” to check the IEPE power supply of your FieldpaqⅡ. To conduct the checking, discount all sensors and select Verify. In normal condition, the power supply of all channels should be around 24.7 Volts. If the result shows abnormal voltage levels, please contact Benstone Instruments for assistant. TTL Out : The TTL Out allows you to have the FieldpaqⅡ...
  • Page 46 Time in DU : The auto conversion from Sensor unit (SU) to Display unit (DU) is not applicable to time domain data during real-time measurement. (see Section 4.10 Engineering Unit Menu : Setting up the Engineering Units). However, after the measurement is stop, you can use this function to show your time waveform data in Display Unit.
  • Page 47 Note : Use this tool to add a note to your measurement. The Note you selected or created will you saved as a part of the data file. You can also use the note for generating a default file name in the file name option menu. With the Note tool, you can identify your data file easily among many files.
  • Page 48 Note: The illustrating displays for this example are from the 4 channel analyzer impaq Elite. They are slightly different from that of Fieldpaq II. 1. Enter Channel Setup and change the Coupling of channel 1 as IEPE (In this example...
  • Page 49 2. Enter Engineering Unit setup, and change the sensor type of channel 1 as Sound 3. From the main display, select Tools/Calibration. 4. Select Unit as dB, input Calibration frequency as 1000 Hz. 5. Turn on the calibration signal of the calibrator, and then select “Acquire signal” In this example we got Test Amp=67.988 dB...
  • Page 50 6. Input the Reference Amplitude as 94 dB, which is exactly the amplitude level generated by the calibrator 7. The system derives the calibrated sensitivity as 50.052 mV/Pa. You can acquire the calibration signal again to see if the calibration result is correct or not. Press OK to leave calibration menu, and then the calibrated sensitivity will be saved to the Engineering Unit table.

  • Page 51: Status Bar

    Mark cursor : Select Mark Cursor will add a label showing the cursor values. After marking a cursor, you can move the cursor to other location and mark it again. Undo Mark Cursor : Select Undo Mark Cursor to cancel the previous cursor label. Clear All Marks : Select Clear All Marks to delete all the cursor labels.

  • Page 52: Waterfall Measurement

    Another very useful program for varying speed measurement is “Order Tracking” analysis. Please contact Benstone Instruments for more information about this application. 4.18 Step Control of Waterfall Measurements AS you select Waterfall mode, please select the way of controlling measurement steps.

  • Page 53: Navigating The Display Of Waterfall Plot

    Note : That some of the measurements may be skipped if the rotation speed ramps too fast. To measure a start up process, set the Stop RPM greater then the Start RPM. For a coast down process, the Start RPM must be greater than the Stop RPM.
  • Page 54 Channel : Because only one waterfall plot can be displayed on the screen at one time, you can choose the channel data for display from this menu. Adjust View Angle : Select this option to adjust the view angle of waterfall plot. And then use navigation keys to adjust the view angle.
  • Page 55 Y-Scale : Select this option to adjust the range of Y-axis. Auto : Conduct auto scaling on the Y-axis. Bottom Up and Down Use these two options to tune the bottom (the minimal value of Y-axis) of the waterfall plot up or down. When the traces of interested signal are mixed up with noise floor, you may use these options to hide the unwanted noise from the plot.

  • Page 56: Envelope Scanning

    Cursor : Select the type of cursor for waterfall or intensity map plot. Trace Cursor Select the trace cursor (horizontal) for the waterfall or intensity map plot. Use navigation keys to move left or right to move the cursor. A trace cursor highlights the spectrum trace at its position.

  • Page 57: Tools

    results on a waterfall plot. For example, the plot below is the envelope scanning result of a damaged bearing. From this example you can see that the envelope spectrum shows clear bearing signal when the envelope filter is set at 3.2 kHz and 12.7 kHz. Hence you can set the center of envelope filter at one of these frequencies for a better measurement quality.

  • Page 58: Balancer Program

    Balancer Program Description The Balancer program is designed so that you can balance rotors of various types on various machines. The FieldpaqⅡ allows the user to balance a rotor on a machine in-the-field without the aid of a computer. W e have developed several balancing programs that will quickly and easily balance the rotors through a step by step process that the user follows.

  • Page 59: Main Display

    Main Display On the rotor balancing main display, select the action you would like to do : Single Planes, Dual Planes, Overhung, Three Planes, Four Planes, 3 Balancers, Continue a saved Job, or Redo a saved job, Exit, Preference or Tools. Single Plane Balancing : Select this icon to begin single plane balancing on a new rotor, including...

  • Page 60: Continue A Saved Job

    including trial weight process calculating balancing coefficients. Three plane Balancing : Select this icon to begin Three plane balancing on a new rotor as shown in the picture, including trial weight process and calculating the balancing coefficients. Four plane Balancing : Select this icon to begin Four plane balancing on a new rotor as shown in the picture, including trial weight process and calculating the balancing coefficients.

  • Page 61: Preference

    Exit Press exit to exit Balancer. Preference Unit System : You can choose unit in Metric or in Imperial. Tools About : Show the Software and Firmware Version. IEPE Check : Check the IEPE Power or IEPE BIAS. This utility is used to check the condition of the sensor and cables.

  • Page 62: Single Plane

    Balancing setup After selecting a balancing job (single plane, dual planes, etc.) from the main display, the next display you will enter various parameters for each type of balancing setup as shown in the displays below. It should be pointed out that the sensor positions (CH1, CH2, CH3, CH4) as shown on each display must be mounted on the machine as shown in the picture for accurate results.
  • Page 63 Setup page for four plane balancing Number of measurement points : Using a single point for balancing will rely entirely on only one sensor on each balancing plane to generate the balancing coefficients. In most cases, this is adequate to balance rotors. However, it may be necessary to use multi-point balancing for more accurate balancing results.
  • Page 64 Coast down 1X : This function is for plotting the 1X (first order) vibration signal during coast down on your rotating machine. This plotted information is very useful in understanding your machine’s behavior during different operating rpms. This will be explained in more detail in section 4.10 of the manual. During your balancing process, you balance at a static rpm.
  • Page 65 Tolerance : Selecting Tolerance on the main display will open up a Tolerance setup window. This window allows you to enter the desired ISO Grade for the balance job. ISO 1940 Grade : Select from the pull-down menu one of the following grades. When you select [Applied to Tolerance] it will apply the values as shown in the columns below.
  • Page 66 Max Speed : Enter the maximum Speed you expect the rotor to go. This value is used for calculating the Maximum allowable unbalance according to ISO 1940. Residual Unbalance : Residual unbalance is the allowable unbalance value remaining after the balancing job is completed as defined in the ISO 1940 standard.

  • Page 67: Dual Plane

    Phase correction Allow you to input the rotational direction and locations of the sensors. By specifying the locations of sensors, the balancing program is able to measure the absolute physical phase of the vibration signals. If you are going to measure 1X vibration during coast down process, it is necessary to input the locations of sensor correctly.

  • Page 68: Balancers - Single Plane

    Sensor Type : Select Acceleration, Velocity, or Displacement. Sensor Unit (SU) : Select Gs, m/s2, in/s2, or m/s, in/s when Velocity is selected or m, um, mil or inch when displacement is selected. Sensitivity mV/ SU : This is an input box for the user to enter the correct sensitivity for the sensor used.
  • Page 69 Balancing a rotor is an interactive measurement process. There are several steps with balancing, and we have comments at the bottom of each screen to prompt the user to the next step. Notice the rotation speed is now displayed. In this example, it is 3565 RPM. The bottom window shows “reading rotation speed, press “OK”...

  • Page 70: Balancers - Dual Plane

    5.11 Heavy spot estimation (1X polar plot) If 1X coast down option is selected in the balancing setup menu, the program will start to automatically make measurements of 1X and plot as the rotor starts decreasing the speed. The vibration level and phase of the 1X traces are shown in the under resonance, close to the 1 resonance and over resonance examples.
  • Page 71 Operational speed Close to the 1 resonance example : When rotational speed is close to the 1 resonance of the structure, the 1X coast down trace will look like a curve, as illustrated by the following figure. As the machine coasts down to a lower speed, the phase becomes constant once again.
  • Page 72 Operational speed 5.12 Trial weight Trial weights are necessary in the balancing process to balance your rotor. You can choose to add or subtract (cut) weight on the plane. If you are adding weight, you are physically attaching a weight to the rotor. If you are removing weight, you are physically removing the weight (or material) from a rotor.

  • Page 73: Redo A Saved Job

    5.13 Multiple point balancing and projected vibration When multiple point balancing is conducted, the program will derive more than one set of balancing coefficients. These different balancing coefficients may lead to different balancing mass instructions. To understand this phenomena better, we’ll use an example for illustration as follows : Suppose we select two points for a single plane balancing job.
  • Page 74 Case B Balancing with coefficient from point two : If we balance the rotor using coefficient from point two (Still using one coefficient), (using the standard balancing algorithms) we expect to reduce the vibration of point two from B to B2 which indicates perfectly balanced. But in this case, the vibration at point one is changes from point A to A2, which is not satisfactory.
  • Page 75 Case C : Case C : Projected vibration for point one Project vibration for point two Case D Balancing with least squares calculation with weighting : Adding a larger weighting factor to balancing reduces the vibration more at one point. (Likewise adding a smaller weighting will reduce the vibration less.) What does weighting do? The process of weighting involves emphasizing the contribution of some aspects of a phenomenon (or of a set of data) to a final effect or result, giving them more weight in the analysis.
  • Page 76 Case D : Case D : Projected vibration for point one Project vibration for point two With 1.0 weighting applied With 0.5 weighting applied Weighting applied Weighting applied Least Squares Multi-point to point 1 : to point 2 : Calculation? balancing? Case A Not applicable...

  • Page 77: Balancers Mass

    5.14 Balancing Mass After the vibration measurements with trial weight(s), the program will show you the location and amount of the balancing mass required to balance the rotor. Direction : toggle the direction of the polar plots as counter-clockwise or clockwise.

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