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Casella CEL-960 User Manual

Human vibration meter
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CEL-960 Human Vibration Meter
HB4040-01
User Manual
CASELLA MEASUREMENT
Regent House,
Wolseley Road,
Kempston,
Bedford,
MK42 7JY, U.K.
Phone: +44 (0) 1234 844 100
Fax: +44 (0) 1234 841 490
E-mail: info@casellacel.com
Web: www.casellameasurement.com

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  • Page 1 CEL-960 Human Vibration Meter HB4040-01 User Manual CASELLA MEASUREMENT Regent House, Wolseley Road, Kempston, Bedford, MK42 7JY, U.K. Phone: +44 (0) 1234 844 100 Fax: +44 (0) 1234 841 490 E-mail: info@casellacel.com Web: www.casellameasurement.com...

  • Page 2: Table Of Contents

    Battery LED ....................... 8 2.2.4 Alarm LED ......................8 On/Off key ......................... 9 Charging the battery ....................... 10 Using the CEL-960 in stand-alone mode ................11 Introduction ........................11 Calibration of CEL-960 ..................... 11 Measurement mode ......................11 Data reading mode ......................11 Using the CEL-960 with a PDA..................
  • Page 3 CEL-960 Human Vibration Meter 4.4.2 Creation / Editing / Deletion of a ‘Workshop’ ..........14 4.4.3 Assignment / Removal of a CEL-960 to/from a ‘Workshop’ ......15 4.4.4 Reading / Writing of time and date ............... 16 Configuration management screen ................. 16 4.5.1...
  • Page 4 CEL-960 Human Vibration Meter 5.4.2 Data transfer via USB..................46 dB96 System errors ......................48 Technical specifications ....................50 Standards ........................50 Metrology ........................50 Memory module ......................51 Battery ..........................51 Physical characteristics ....................52 Comment on the influence of the electromagnetic environment ........52 Maintenance ........................

  • Page 5: General

    CEL-960 Human Vibration Meter General Introduction The CEL-960 is a unique concept in the measurement of human vibration since, unlike other instruments, the person making the measurement can stand remotely from the subject being monitored and thus not interfere with their work, which makes it particularly ideal for mobile operatives such as fork lift truck drivers.

  • Page 6: Displayed Values

    CEL-960 Human Vibration Meter o Time constant. o Alarm threshold. Possibility to program measurement in terms of starting date and duration (3 different modes): o Immediate. o Delayed. o On a presence detector (with the WB transducer only) Large storage capacity (1 GB flash memory).

  • Page 7: Layout Of The Cel-960 Instrument

    HSE in the UK, NIOSH in the US. 2.1.2 Charger / Download connector A USB-type connector is used to charge the CEL-960 with the charger provided (see section 2.4). It is also be used to read the internal memory. Casella CEL...

  • Page 8: Led's

    CEL-960 instrument. It lights up as soon as the charger is connected to the CEL-960. It is: Permanently green during the charging process (turns off at the end of the process).

  • Page 9: On/Off Key

    The CEL-960 is “Off”: slightly pressing this key will set the instrument in stand-by mode, the measurement (On/Off) LED is active and green. The CEL-960 is “Off”: pressing the On/Off key for about 3 s will set the instrument in measurement mode (immediate start) with the current measurement configuration i.e.

  • Page 10: Charging The Battery

    To do so, connect CEL-960 to the charger base. The Battery LED lights up in red upon connection, then turns green indicating that the charging process has started and is in progress.

  • Page 11: Using The Cel-960 In Stand-Alone Mode

    3 Using the CEL-960 in stand-alone mode 3.1 Introduction Although the CEL-960 has been designed to be operated coupled with a PDA or PC that acts, as the user interface, it can be used in stand-alone mode. In this case, the CEL-960 can perform measurements and store them, according to the measurement configuration previously used.

  • Page 12: Using The Cel-960 With A Pda

    This is the most advanced operating mode for the CEL-960, which gives it unrivalled power and user-friendliness required to study occupational vibration. The PDA is used to set up the CEL-960 in a „workshop‟, then to monitor up to five instruments simultaneously.

  • Page 13: Menu Bar

    When the software program is started for the first time, the user is prompted for a licence number, which will allow unlocking operating modes and options. The software will not operate without this number. After launching the dB96 program, the user must „search‟ for the CEL-960(s) present in the wireless communication range using the key.

  • Page 14: Main Screen

    The left part of the screen shows the list of instruments that can be assigned to the „workshop‟ (this list is built up as CEL-960 instruments are detected in the immediate surroundings of the PDA). Already assigned instruments are listed in the right part of the screen.

  • Page 15: Assignment / Removal Of A Cel-960 To/From A 'Workshop

    4.4.3 Assignment / Removal of a CEL-960 to/from a ‘Workshop’ Once an instrument is selected in the list on the left (click on the CEL-960 serial number to select it), the operator can assign the instrument to a „workshop‟ as...

  • Page 16: Reading / Writing Of Time And Date

    CEL-960 Human Vibration Meter Selecting icon will remove the selected instrument from the „workshop‟ and place it in the list on the left. CEL-960 no longer appears on the top right of the screen. 4.4.4 Reading / Writing of time and date...

  • Page 17: Measurement Configuration Screen

    4.5.1 Measurement configuration screen Suited to the CEL-960 operating mode (whole body, hand arm, free), this screen is more or less detailed depending on the presence of the audio and spectrum option. Some of these screens below are only available in CEL-960 Expert.
  • Page 18 CEL-960 Human Vibration Meter  If the keyboard hides the table bottoms, the user can click on the keyboard icon , so that the keyboard is minimised and the hidden parts are shown. 4.5.1.2 Configuration of measurement results This part of the measurement configuration allows the operator selecting only results that he/she wants to see displayed and stored.
  • Page 19 CEL-960 Human Vibration Meter The different triggering options are as follows: Overload: as soon as the vibration signal overloads, CEL-960 indicates it by activating the LED. Exceeding A(8): as soon as the exposure level A(8) is exceeded, the alarm LED is activated.
  • Page 20 CEL-960 Human Vibration Meter 4.5.1.4 Configuration of the audio recording (option) The recording of the vibration signal is an option that is available in whole-body, hand-arm and free mode. In the configuration screen, the operator can select: The sampling frequency ranging from 256 Hz to 8192 Hz.

  • Page 21: Start-Up Configuration Screen

    : the operator must be seated for, e.g., 10 s, for data storage to start and leave the seat for 5 minutes for CEL-960 to stop data acquisition. Casella CEL...
  • Page 22 , when the cursor is placed on the hours, minutes or seconds field. The value of each field can also be entered through the keyboard. If the “duration” key is not checked, the CEL-960 will record results until the battery is empty or until the operator stops the measurement (see shutdown procedure with the PC).
  • Page 23 CEL-960 Human Vibration Meter To program this start mode, the operator must enter: The configuration name. The measurement starting date and time, by successively selecting the different fields for the date and time, using either the arrows, or the keyboard.

  • Page 24: System Configuration Screen

    LEDs by checking the “discreet mode” box. The LED that indicates by blinking that CEL-960 is in measurement mode is disabled. There is thus no difference between a CEL-960 instrument that is running and one that is shut down.

  • Page 25: Measurement Mode

    CEL-960 battery, if the expected measurement duration is not suitable.  The end date and time predicted by the CEL-960 takes into account the battery capacity and the memory capacity. Once the ending date and time are validated for a CEL-960, a “configuration activation”...

  • Page 26: Measurement Screen

    Visual display of measurement results The results screen displays the results, as well as the status of the selected CEL-960. To select a CEL-960 instrument, click on its icon on the right side of the screen. A frame surrounds the active CEL-960 instrument.
  • Page 27 CEL-960 Human Vibration Meter animated icon represents a CEL-960 in measurement mode, while icon represents an instrument waiting to start. Also shown is: Status of the CEL-960 battery. Expected measurement ending date for the selected CEL-960. 4.6.1.1.2 The results area The results area consists of 4 areas: Area “acceleration and coding, overload and under-load indicators”.
  • Page 28  After the measurement is started „waiting‟ is displayed on the PC screen until the CEL-960 measurement has stabilised. The recording of data and the real-time display start as soon as the sign appears on the selected CEL-960.  Overload...

  • Page 29: Measurement Stop

    Once the measurement is stopped, the Measurement (On/Off) LED remains on (green), then after 5 min, the LED blinks for a few seconds and the CEL-960 shuts down. On the PC, the screen below is displayed, listing all global results programmed in the configuration.

  • Page 30: Transfer / Deletion Of Files

    12:07:06. 4.8.1 Transfer via Bluetooth When the measurement is stopped, the user can transfer the list of files stored in the different CEL-960 instruments, then retrieve signal (.wav) files and store them in a folder on the PC. Casella CEL...
  • Page 31 To do so, he/she must select the corresponding CEL-960 instrument and click on icon . The files in the CEL-960 will be shown, as per the example below. All measurements can be transferred to the folder indicated at the bottom of the screen “\My Document”, by clicking on...
  • Page 32 CEL-960 Human Vibration Meter Check part or all of the signal files associated with the *.BIV file and click on icon to transfer them to the folder containing the *.BIV file.  Due to their potentially large size, it is recommended that signal files are transferred to a PC using the USB connection.

  • Page 33: Transfer Via Usb On Pc

    For a quick transfer of large files the USB connection should be used. When CEL- 960 is connected to the PC via the USB cable, the CEL-960 memory will be displayed in the file explorer as a mass storage system (See section 5.4.2).

  • Page 34: Reading Data Stored On The Pc

    4.8.3.2 Deletion of *.WAV signal files When the CEL-960 includes the „signal‟ recording (.wav file) option, *.WAV files can be associated with *.BIV data files. These files will be automatically deleted when the *.BIV file with which they are associated is deleted. However only 500 *.WAV...
  • Page 35 CEL-960 Human Vibration Meter These screens allow stored data to be viewed. The first screen displays the list of all measurement folders (after each measurement, a specific folder is created in the root folder). On this screen, the result file “GR_010003_081007_1827724.xml”, which is displayed below the list of measurement folders, is a global results file (*.BIV), the time data of which has not been transferred to the PC.

  • Page 36: Secondary Functions

    View available memory. 4.10.1 Connection When the CEL-960 instrument is on but is not connected by Bluetooth to dB96, the operator can force a connection by clicking on „Connect‟. 4.10.2 Disconnection If it is necessary to disconnect a CEL-960 with the connected PC, select „disconnect‟.

  • Page 37: Calibration Of Cel-960

     Whatever the calibration type, the relevant transducer must be connected. This function can be used to start calibrating CEL-960 from the PC. In addition to classic calibration, this calibration includes offset calibration. Depending on the type of transducer to calibrate (mono-axial or tri-axial), the number of channels will be 1 or 3.
  • Page 38 CEL-960 Human Vibration Meter 4.10.3.2 Calibration using a dynamic calibrator The transducer will need to be screwed onto the calibrator in accordance with the operating procedure of the calibrator. For the calibration of whole body transducers, the transducers must be removed from the seat pad.

  • Page 39: Measurement Start

    If icon is displayed in a screen, this means that the PC is attempting to connect to CEL-960. Check that the Bluetooth communication LED is on and is blinking. Otherwise, turn CEL-960 on, quit the window, then the software and restart the operation.

  • Page 40: Measurement Stop

    4.10.5 Measurement stop The measurement can be forced to stop using this command. 4.10.6 Rename the instrument The operator can associate the name of the individual wearing the CEL-960 or any other identification information with the instrument number. 4.10.7 Factory configuration With this function, the operator can know the intrinsic characteristics of the CEL- 960.

  • Page 41: Auto Test

     To do this auto test, the transducer must be present on the instrument.  Caution: the auto test destroys all data present in the CEL-960 memory. Do a backup before starting this action. The following tests are performed: Bluetooth communication.

  • Page 42: Sdcard Memory Formatting

    CEL-960 Human Vibration Meter Measurement of the voltage of the analogue part. Measurement of consumed current. The test results are displayed in green if the test is OK and in red if tolerances are exceeded. Background noise level in the 0.4Hz-4kHz band.

  • Page 43: Creating A Transducer

    CEL-960 Human Vibration Meter Screen 1 Screen 2 4.10.11 Creating a transducer The operator can define the characteristics of a transducer if designed to operate with a CEL-960. In this case, the information relative to this transducer must be entered in the screen below.
  • Page 44 Quit the screen by clicking on the “Cancel” icon  Contact the Customer Service Department before doing this operation, should you find the provided instructions not clear enough.  We recommend doing this operation with the PDA at close range to the CEL-960 (50 cm maximum). Casella CEL...

  • Page 45: Using The Cel-960 With A Pc

    If Bluetooth is not integrated in the PC, an external Bluetooth dongle can be connected, which will be automatically detected by the computer. Turn CEL-960 on by pressing on the On/Off key 5.2 Launching software dB96 on the PC After launching the application, the user of dB96 version PC is displayed: it is exactly the same as the interface of PDA version PC.

  • Page 46: Data Transfer

    CEL-960 Human Vibration Meter Please refer to the previous chapter “Using CEL-960 with a PDA” for a description of all functions. 5.4 Data transfer To process data recorded on the CEL-960 instrument using a spreadsheet or dB98 software, the operator must first transfer them from the CEL-960 to the PC.
  • Page 47 CEL-960 Human Vibration Meter In this case, the CEL-960 must be connected to the PC using the USB cable. The CEL-960‟s storage memory will be displayed in the Explorer as an additional disk. The “Data” folder contains all *.BIV time data files, while the WAV folder contains all folders for the “signal”...

  • Page 48: Db96 System Errors

    CEL-960 Human Vibration Meter 6 dB96 System errors dB96 may display alarms generated by CEL-960, which are more or less explicit. Errors are numbered and can be cross referenced with the table below to understand the nature of the issue. Some of the errors below indicate and major fault, meaning the instrument will need to be returned for repair to our customer service department.
  • Page 49 CEL-960 Human Vibration Meter SDCARD codec ALARM_CONFLIT_SDCARD_CODEC conflict for SPI access Test card ALARM_COM_BOARD_TEST communication problem Very low battery 1024 ALARM_VERY_LOW_BAT alarm Battery problem or 2048 ALARM_SUPPLY_CONSO analogue voltage or consumption alarm Problem accessing 4096 ALARM_ACCES_SDCARD SD card Timeout on TX of...

  • Page 50: Technical Specifications

    CEL-960 Human Vibration Meter 7 Technical specifications 7.1 Standards ISO 8041 (2005). ETSI EN 300 328 V1.5.1 (2004) NF EN 61000-6-1 NF EN 61000-6-2 NF EN 61000-6-3 NF EN 61000-6-4 (2001) EN 61010-1 (2001) 7.2 Metrology Whole body mode Hand arm mode...

  • Page 51: Memory Module

    CEL-960 Human Vibration Meter Spectrum (option) Octave 1 Hz - 2kHz 1 Hz - 2kHz 1/3 octave 0.8Hz- 2.5kHz 0.8Hz- 2.5kHz Signal mode (option) Sampling frequency 256-8192Hz 256-8192Hz Depends on the calibration frequency Depends on the calibration frequency Pre-trigger From 0 s to 16 s...

  • Page 52: Physical Characteristics

    CEL-960 Human Vibration Meter Transducers WBA001 WBA001 + DJB120 Other Communication Bluetooth OFF Communication Bluetooth ON Charging time: 6h. 7.5 Physical characteristics Dimensions: 100 mm * 55 mm * 25 mm. Total weight: 140g. IP53 protection. 7.6 Comment on the influence of the electromagnetic environment As they are subjected to electrostatic discharges, measured level can be altered.

  • Page 53: Maintenance

    Refer to section 4.10.3 « Auto test ». 8.2 Disposal In no event should the CEL-960 be thrown in a litter bin. It must be disposed of according to the WEEE Directive*. A WEEE-compliant disposal and recycling procedure should be applied.

  • Page 54: Icons Used In Db96 Control Software

    CEL-960 Human Vibration Meter 9 Icons used in dB96 Control Software Symbol Explanation Symbol Explanation CEL-960 is Search CEL-960 over the wireless network unselected Display all CEL-960 detected by the CEL-960 selected wireless connection Go to measurement Read measurement configuration...

  • Page 55: Glossary Of Terms & Formulae

    CEL-960 Human Vibration Meter 10 Glossary of terms & formulae 10.1 Terms a: Band limit frequency-weighted RMS acceleration in m/s² ax: Band limit frequency-weighted RMS acceleration, x axis ay: Band limit frequency-weighted RMS acceleration: y axis az: Band limit frequency-weighted RMS acceleration: z axis aw: Frequency-weighted RMS acceleration (Wd, Wk, Wh filter) in m/s²...
  • Page 56 CEL-960 Human Vibration Meter MTVV: maximum value of mobile RMS acceleration )= 1/ (t) dt MTVV= max (aw(t )) exponential integration VDV: vibration dose in m/s 1.75 VDV= (t) dt ahv: overall hand-arm vibration acceleration = (a A(8): daily exposure to hand-arm vibrations (m/s...

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Cel-960 hb4040-01

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