CESVA VC431 User Manual
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CESVA VC431 User Manual

Triaxial vibrometer
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VC431
Triaxial vibrometer
User's manual
M_VC431_v0014_20150730_EN

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Summary of Contents for CESVA VC431

  • Page 1 VC431 Triaxial vibrometer User’s manual M_VC431_v0014_20150730_EN...

  • Page 3: Table Of Contents

    2.1.3 Powering the accelerometer on and off ..............16 2.2 Starting a measurement ....................17 2.2.1 Starting up the VC431 ...................17 2.2.2 Main menu of the VC431: Selecting applications, options and settings ....18 2.3 Verification of the VC431 .....................19 2.4 Under-range and Overload ..................22 2.5 Measuring with the Hand-Arm (H) application .............22...
  • Page 4 2.13 Sensitivity adjustment ....................39 2.14 Contrast setting ......................40 2.15 Clock setting ......................41 2.16 Test Option........................41 2.17 Switching off the VC431 ....................42 2.18 Precautions and warnings ..................42 3. VIEWING DATA ON PC ....................43 3.1 Installation of the driver ....................43 3.2 Capture Studio Software .....................43 3.2.1 Capture vibrometer data in real time ..............45...
  • Page 5 VC431 Instruction manual 4.8 Effect of the accessories on the accelerometer ............58 4.9 Display ........................58 4.10 Integration time ......................58 4.11 Preheating time ......................59 4.12 Influence of temperature....................59 4.13 Influence of humidity ....................59 4.14 Electromagnetic compatibility ..................59 4.15 Batteries and external powering ................60 4.16 Dimensions and weight .....................60...

  • Page 6: General Description

     National laws and regulations on noise and vibrations: o Whole body in buildings vibrations [ISO 2631-2] The VC431 can also evaluate the effect of vibration on the structure of buildings and the terrain:  The UNE 22-381-93 Standard Control of vibrations produced by blasting with explosives and transmitted by the terrain.
  • Page 7 ), in accordance with the ISO 2631-1 Standard. The VC431 makes it possible to measure vibration in the place where the contact between the human body and the source of vibration (feet, seat or backrest) takes place, always observing the corresponding system of coordinates.
  • Page 8 To perform these measurements it is necessary to have the triaxial accelerometer AC032. The VC431 measures the following functions simultaneously: RMS value of acceleration on the x axis with W weighting RMS value of acceleration on the y axis with W...

  • Page 9: Main Characteristics Of The Vc431

     The memory of the VC431 makes it possible to save both final results and the evolution over time of the parameters measured in hand-arm (H), whole body (W) and buildings (B) applications, and can recalculate them later (if the CSE software is available) for any time interval.

  • Page 10: Description Of The Vc431

    USB rev. 2.0. 11. CN031 cable BINDER 712 connector. Circular male BINDER 4-contact connector of the CN031 cable to be connected to the BINDER 712 female connector of the VC431 vibrometer. 12. Triaxial accelerometer AC031 (Hand-arm). Triaxial accelerometer for use with the hand-arm (H) application.
  • Page 11 VC431 Instruction manual 20. AC033 triaxial accelerometer. Mat-type triaxial accelerometer for use with the whole body (W) application. The length of the accelerometer cable is 2 metres. 21. AA033 adapter for the AC033 accelerometer. Strap adapter for the AC033 on seat...

  • Page 13: Display And Use Of The Keypad

    Instruction manual 1.4 Display and use of the keypad The VC431 has a main menu with icons to access the equipment's main applications, options and adjustments. The top left part of the display always has an indicator showing the current application, option or setting: ...
  • Page 14 The use of the display light reduces instrument battery life. The following tables describe the meaning of the indications used for the buttons of the VC431 in the different adjustments and applications: MAIN MENU BUTTONS / DELETE MEMORY OPTION / SENSITIVITY ADJUSTMENT MENU...
  • Page 15 VC431 Instruction manual BUILDINGS APPLICATION BUTTONS STRUCTURE APPLICATION BUTTONS Key to go back to the main menu Key to go back to the main menu Key to start measurement Key to start or resume measurement Key to end measurement Key to start or resume recording...
  • Page 16 TEST OPTION BUTTONS Key to go back to the main menu Key to check the whole body application check hand-arm application check buildings application Key to start or resume measurement Key to end measurement Key to temporarily halt measurement...

  • Page 17: Operating The Vc431

    If any of these items are missing please contact your official retailer. NOTE: to work with the VC431 you need to have an AC031, AC032 or AC033 triaxial accelerometer. If you did not acquire any of these accelerometers together with the VC431 contact your official retailer.

  • Page 18: Powering The Accelerometer On And Off

    To use this option contact an official retailer. RECOMMENDATIONS: if you do not intend to use the VC431 for a long period of time, remove the batteries from the VC431 to avoid possible damage caused by battery loss. It is advisable to always carry spare batteries 2.1.3 Powering the accelerometer on and off...

  • Page 19: Starting A Measurement

    If you are using the VC431 for the first time or if the last time you switched it off you were not using an application, the main menu will be displayed.

  • Page 20: Main Menu Of The Vc431: Selecting Applications, Options And Settings

    Once the vibrometer is switched on, the main menu or the display of the last application used will be displayed. If the VC431 does not display the main menu you can access it by pressing button. When the VC431 is in the main menu, the following indication will be...

  • Page 21: Verification Of The Vc431

    Note*: the total number of registers (recording or final result) is limited to 256. 2.3 Verification of the VC431 It is advisable to check the VC431 before starting a measurement, adjust sensitivity and, if necessary, check it again after the measurement has been taken.
  • Page 22 Although it is advisable to connect the accelerometer with a screw or by using a mounting magnet (see 4.21). 5. Take the VC431 to the main menu, and use the arrow buttons to select the sensitivity adjustment icon and access it with the button.
  • Page 23 Note*: If you buy the VC431 with accelerometer(s), it comes with the real sensitivity already entered for the accelerometer(s) acquired. The other sensitivities will be the rated ones.

  • Page 24: Under-Range And Overload

    2.4 Under-range and Overload The VC431 has an overload indicator for each function. If there is an overload during measurement, the “·” symbol will be displayed at the top left of the table that displays the value of the function affected. This indication will remain there until the measurement ends.

  • Page 25: Securing The Accelerometer

    VC431 Instruction manual 2.5.1 Securing the accelerometer Make sure that the AC031 accelerometer is properly connected. The accelerometer should be placed at the entry point of the vibration to the worker's hand- arm system so that it will interfere as little as possible in their work. It is usually placed in the centre of the grip area where a motor tool is held.

  • Page 26: Access To The Hand-Arm Application

    For this purpose, simply enter the projection time (tp) that corresponds to the forecast exposure to noise time. By default the VC431 assigns 8 hours to the projection time, but this value can be modified.

  • Page 27: Starting A Measurement/Recording

    If a measurement is taken, no data are saved, although subsequently the final results can be saved with the SAVE RESULTS main menu option: The VC431 measures and displays the following functions:  RMS value of acceleration on the x axis with W weighting ...

  • Page 28: Stopping Or Ending A Measurement/Recording

    Numerical display Graphical display 2.5.6 Stopping or ending a measurement/recording To stop measuring or recording temporarily, press . The measuring status indicator will switch to . To resume measuring or recording, press To end measuring or recording, press . The measuring status indicator will switch If you wish to modify the projection time see 2.5.3.

  • Page 29: Securing The Accelerometer

    VC431 Instruction manual 2.6.1 Securing the accelerometer Make sure that the AC033 accelerometer is properly connected. You need to know the position of the person to be evaluated: If the person is on foot on a vibrating surface, the measurement should be taken in the place where he/she rests his/her foot most frequently;...

  • Page 30: Access To The Whole Body Application

    The Seated orientation maintains the axes marked on the accelerometer and should be used when the person to be is seated (and the point of measurement is the seat or the feet) or is standing. The Backrest orientation automatically changes the x and z axes. This orientation should be used when the person to be evaluated is lying down or seated and the measuring point is the back.

  • Page 31: Preliminary Settings: Orientation Of The Accelerometer And Projection Time

    For this purpose, simply enter the projection time (tp) that corresponds to the forecast exposure to noise time. By default, the VC431 assigns 8 hours to the projection time, but this value can be modified.

  • Page 32: Starting A Measurement/Recording

    If a measurement is taken, no data are saved, although subsequently the final results can be saved with the main menu option: SAVE RESULTS. The VC431 measures and displays the following functions:  RMS value of acceleration on the x axis with W weighting ...

  • Page 33: Stopping Or Ending A Measurement/Recording

    VC431 Instruction manual 2.6.6 Stopping or ending a measurement/recording To stop measuring or recording temporarily, press . The measuring status indicator will switch to . To resume measuring or recording, press . To end a measurement press . The measurement indicator will switch to If you wish to modify projection time, follow the steps indicated in section 2.6.3 The value of...

  • Page 34: Access To The Buildings Application

    If a measurement is taken, no data are saved, although e subsequently the final results can be saved with the SAVE RESULTS main menu option: The VC431 measures and displays the following functions:  RMS value of acceleration on the x axis with W weighting ...

  • Page 35: During Measurement

    VC431 Instruction manual  MTVV : Maximum MTVV value of acceleration with W weighting  MTVV * : Total combined MTVV acceleration value (vector) with W weighting  Measurement time *Parameter defined in the R.D 1367/2007 (Noise Law Regulation), and adopted in the autonomous community legislation and regulations derived from it (such as Law 16/2002 of the Government of Catalonia or Law 5/2009 of Castile and Leon).

  • Page 36: Measuring With The Structure Application (S)

    To make another measurement press To return to the main menu, press 2.8 Measuring with the Structure application (S) The STRUCTURE application is designed to evaluate the effect of vibration on the structure of buildings and terrain, both for short-lasting and stationary vibration. 2.8.1 Securing the accelerometer Make sure that the AC032 accelerometer is properly connected.

  • Page 37: Starting A Measurement/Recording

    To start measuring press . You can save the final result by means of the SAVE FINAL RESULT option on the main menu. The VC431 measures and displays the following functions:  Peak value of the speed vector on the x axis ...

  • Page 38: Ending A Measurement

    With this main menu option you can choose to make a measurement ( ) which will not be saved in the VC431's memory (although you can later save the final result [see 2.9]) or make a recording ( ) which will save the evolution over time of the measurement and the final results in the VC431's memory.

  • Page 39: Viewing A Register

    Number of registers in the VC431's memory (variable value) with regard to the maximum number of registers permitted (256). The list with all the registers in the VC431's memory is displayed in the centre of the display:  To navigate the list, press ...

  • Page 40: Deleting A Register

    Press to return to the initial list with all the registers of the VC431's memory. Other types of file you may find are: - Final results of the STRUCTURE (S) application. - Final results of the TEST option for hand-arm (h), whole body (w), and buildings (b) applications.

  • Page 41: Sensitivity Adjustment

    NOTE: The vibrometer's sensitivity can only be adjusted by authorised and technically qualified personnel. The readjustment of sensitivity leads to loss of traceability in the calibration of the unit. 1) Take the VC431 to the main menu, and use the arrow buttons to select the sensitivity adjustment icon and access it with the button.

  • Page 42: Contrast Setting

    TECHNICAL (4.7 Accelerometers). Remember that the on-display units are mV/ m/s SPECIFICATIONS 2.14 Contrast setting 1) Take the VC431 to the main menu, and use the arrow buttons to select the contrast setting icon and access it with the button.

  • Page 43: Clock Setting

    Instruction manual 2.15 Clock setting Setting to adjust the date and time used for measurements and recordings. Take the VC431 to the main menu, and use the arrow buttons to select the clock setting icon and access it with the button:...

  • Page 44: Switching Off The Vc431

    The VC431 should be checked before and after each measurement. Use the CV211 vibration calibrator (See section 2.3).  Remove the batteries if you do not intend to use the VC431 for a long period of time.  VC431 vibrometer has been built to be used and deliver great reliability for a long time.

  • Page 45: Viewing Data On Pc

    For download the driver, you need to be registered in the website. In VC431's website, also you can find a pdf document with the instructions to know which is the assigned COM port for the communication between VC431 and PC.
  • Page 46 Select the VC431 model and the correct COM port*. Correct COM port*: You must select the COM port assigned to the communication between the PC and VC431. The steps to be followed to ascertain the port number according to the PC OS are described.

  • Page 47: Capture Vibrometer Data In Real Time

    VC431 Instruction manual 3.2.1 Capture vibrometer data in real time CAPTURE Studio allows you to acquire, in real time, all the data measured by the vibrometer. To do so proceed as follows: 1) Switch on the vibrometer and make sure there is no measurement in progress.

  • Page 48: Downloading Registers From The Vibrometer

    4) Request deletion of the memory by any of the following options: Select the option CAPTURE Memory Delete memory Press the button The registers deleted cannot be retrieved. Note*: for further information about the Capture Studio software, refer to the in-program help (HELP  window CESVA Capture Studio HELP).

  • Page 49: Technical Specifications

    Band limiting (2 Hz – 200 Hz) Upper limit: 1.07480 m/s Lower limit: 0.000010748 m/s Note: the speed limit values vary inversely proportionally to frequency Measurement of frequency in the Structure application Maximum error: Note: values for CESVA accelerometers with rated sensitivity.

  • Page 50: Measurement Range

    4.2 Measurement range Measurement Hand-Arm application Measurement range Frequency Band limiting (Hz) UPPER limit LOWER limit UPPER limit LOWER limit (m/s (m/s (m/s (m/s 60.23 0.038 60.27 0.038 95.42 0.038 96.57 0.038 1.25 151.16 0.038 151.43 0.038 239.29 0.038 239.93 0.038 378.1 0.038...
  • Page 51 VC431 Instruction manual 3685.62 0.038 92.986 0.038 3530.58 0.038 70.756 0.038 1000 3213.66 0.038 51.148 0.038 1250 2686.98 0.038 33.97 0.038 1600 2027.68 0.038 20.36 0.038 2000 1405.62 0.038 11.21 0.038 2500 925.68 0.038 5.87 0.038 3150 594.7 0.038 2.99 0.038...
  • Page 52 75.9924 0.00076 44.2244 0.00076 75.9924 0.00076 37.5516 0.00076 12.5 75.9924 0.00076 31.2664 0.00076 75.9772 0.00076 25.65 0.00076 75.9392 0.00076 20.8088 0.00076 75.848 0.00076 16.7428 0.00076 31.5 75.62 0.00076 13.376 0.00076 75.0652 0.00076 10.6096 0.00076 73.7124 0.00076 8.3068 0.00076 70.6116 0.00076 6.33536 0.00076 64.2732...

  • Page 53: Total Noise Inherent In The Reference Environmental Conditions

    VC431 Instruction manual 375.212 0.0038 384.18 0.0038 183.35 0.0038 1.25 378.062 0.0038 382.66 0.0038 184.148 0.0038 379.24 0.0038 368.866 0.0038 187.53 0.0038 379.696 0.0038 338.694 0.0038 201.704 0.0038 379.886 0.0038 293.854 0.0038 240.73 0.0038 3.15 379.962 0.0038 243.124 0.0038 306.698 0.0038...

  • Page 54: Reference Environmental Conditions

    Note*: the inherent total noise is measured with equivalent levels with an integration time of more than 1 minute. 4.4 Reference environmental conditions Reference temperature: 23 °C Reference relative humidity: 50 % 4.5 Electrical tests The AD003 adapter should be used for electrical calibration. Maximum peak to peak electric voltage applicable with the 17 Vpp AD 003 adapter...
  • Page 55 VC431 Instruction manual The following tables show the frequency weightings W as well as the tolerances. Frequency Weighting Wd Factor Tolerance (Hz) (dB) (dB) - 24.09 0.06242 +2/- 0.125 - 20.12 0.09867 +2/- 0.16 - 16.18 0.1553 +2/- - 12.32 0.242...
  • Page 56 Frequency Weighting Wh Factor Tolerance (Hz) (dB) (dB) -36.00 0.01586 +2/- - 31.99 0.02514 +2/- 1.25 - 27.99 0.03985 +2/- - 23.99 0.06314 +2/- - 20.01 0.09992 +2/- - 16.05 0.1576 +2/- 3.15 - 12.18 0.2461 +2/- - 8.51 0.3754 +2/-...
  • Page 57 VC431 Instruction manual Frequency Weighting Wk Factor Tolerance (Hz) (dB) (dB) - 30.11 0.03121 +2/- 0.125 - 26.14 0.04931 +2/- 0.16 - 22.21 0.07756 +2/- - 18.37 0.1207 +2/- 0.25 - 14.74 0.1832 +2/- 0.315 - 11.55 0.2644 +2/-2 - 9.11 0.3504...
  • Page 58 Frequency Weighting Wm Factor Tolerance (Hz) (dB) (dB) -36.00 0.01584 +2/- 0.125 -32.00 0.0251 +2/- 0.16 -28.01 0.03976 +2/- -24.02 0.06293 +2/- 0.25 -20.05 0.09941 +2/- 0.315 -16.12 0.1563 +2/- -12.29 0.243 +2/- -8.67 0.3684 +2/- 0.63 -5.51 0.5304 +2/-2 -3.09 0.7003 +2/-2...

  • Page 59: Accelerometers

    VC431 Instruction manual 4.7 Accelerometers The VC431 is designed to work with these three accelerometers: AC031, AC032 and AC033. AC031 AC032 AC033 Application Buildings Hand-Arm Whole Body Structure Output IEPE IEPE IEPE Transducer Piezoelectric Piezoelectric Piezoelectric Design of the accelerometer...

  • Page 60: Effect Of The Accessories On The Accelerometer

    4.10 Integration time Integration time for the measurement of average times Minimum 1 second 99 hours, 59 minutes and 59 Maximum seconds NOTE: Integration time is equal to the measuring time. The time evolution of the VC431 is set at 1 second.

  • Page 61: Preheating Time

    Operating mode and position that Normal* operating mode of the vibrometer produces the maximum emission according to the accelerometer used (AC031, AC032 or AC033), VC431 in the of radiofrequency upright position, with the main axis of the equipment perpendicular to the direction of propagation of the field with vertical polarisation.

  • Page 62: Batteries And External Powering

    Normal* operating mode of the vibrometer produces maximum according to the accelerometer used susceptibility (minimum (AC031, AC032 or AC033), VC431 in the immunity) to irradiated fields or upright position, with the main axis of the conducted through the power equipment perpendicular to the direction supply of propagation of the field with vertical polarisation.

  • Page 63: Memory

    Similarly, the product bears the following symbol, which indicates that it is subject to selective waste collection. 4.20 Notes Notes If your VC431 ever failed to comply with any of these specifications, contact the nearest official service for repair or adjustment.

  • Page 64: Accessories

    AA031 handle adapter for the AC031 accelerometer AA131 tool adapter for the AC031 accelerometer Accessories included with the AC032 accelerometer CN032 connection cable from the AC032 accelerometer to the VC431 vibrometer (2.90 metres) Accessories included with the AC033 accelerometer AA033 strap adapter for the AC033 accelerometer...

  • Page 65: Annex A: Functions

    VC431 Instruction manual 5. ANNEX A: Functions 5.1 Function summary chart 5.1.1 Hand-Arm (H) application functions Func. Description Hand-Arm (H) Mode functions RMS value of acceleration on the x axis with W weighting RMS value of acceleration on the y axis with W...

  • Page 66: Buildings (B) Application Functions

    5.1.3 Buildings (B) application functions Func. Description Buildings (B) Mode functions RMS value of acceleration on the x axis with W weighting RMS value of acceleration on the y axis with W weighting RMS value of acceleration on the z axis with W weighting Combined RMS acceleration value MTVV...

  • Page 67: Definition Of Functions

    VC431 Instruction manual 5.2 Definition of functions RMS value of acceleration expressed in m/s , defined by the expression:     (t): instant acceleration according to time t and with frequency weighting on the y axis, in m/s duration of the measurement (evaluation) Total vibration value.
  • Page 69 VC431 Instruction manual...
  • Page 72 Maracaibo, 6 – 08030 BARCELONA (SPAIN) Tel. (+34) 934 335 240 – FAX (+34) 933 479 310 info@cesva.com e-mail: www.cesva.com...

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