Micromega Dynamics SA

Micromega Dynamics SA

- Hand Arm Vibration Dosimeter Software

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The Vib@Work hand-arm range consists of two types of sensor (200G and 5000G) and the “HASensor” and “HAViewer” software. Used individually or in combination, the vibration dosimeters enable the measurement of the hand-arm vibration exposure of an operator using hand-held or hand-guided vibrating tools in accordance with the 2002/44/EC European directive (commonly known as the “vibration directive”).

The 'HASensor' software allows the user :

  • to enter the measurement configuration details (tools used by the operator during his/her working day, position and orientation of the sensors on these tools).
  • to prepare the sensor(s) for measurement.
  • to access - following a period of use of the tools by the operator - the measurements acquired from the sensor(s).
  • to automatically calculate and display the partial (for each tool) and total (for a given operator) exposure values in a simple manner.

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  • Microsoft® Windows® XP (Service Pack 2), Windows Vista® or Windows 7®.
  • Microsoft®.NET Framework 2.0.
  • Hard disk drive with 20Mb of available space.
  • CD-ROM reader.
  • VGA graphics card or compatible video graphics driver at up to 256K colours or higher.
  • Keyboard.
  • Microsoft® mouse or compatible pointing device.
  • Free USB port on your PC (an external USB Hub port may not work effectively).

The Vib@Work hand-arm range consists of two types of sensor (200G and 5000G) and the “HASensor” and “HAViewer” software. Used individually or in combination, the vibration dosimeters enable the measurement of the hand-arm vibration exposure of an operator using hand-held or hand-guided vibrating tools in accordance with the 2002/44/EC European directive (commonly known as the “vibration directive”). 

In addition to a triaxial accelerometer, the sensors also incorporate acquisition, processing and storage circuits, as well as a rechargeable miniature battery. The sensors are therefore autonomous and as a result allow vibration levels to be recorded throughout the operator’s entire working period without the need for an cumbersome and fragile wire connection.  

Each sensor also implements anti-artefact devices incorporating a mechanical filter in each of the 3 measurement axis. These 3 filters, together with the specific acceleration pickup manufacturing technology, prevent any adverse effects from occurring, often encountered when measuring percussive or rotary-percussive tools and which result in consequent measurement errors (a phenomenon known as “DC shift”). 

The 200G type sensors are specifically designed for rotary or non-percussive alternative tools (chain saws, brush rakes, grinders, sanders,…). They can also be used on lower impact-generating tools (impact wrenches, small impact drills)  

The 5000G sensors are specifically designed for highly percussive or rotary-percussive tools (power chisels, rammers, concrete-breakers, perforating tools). 

The docking station allows the use of up to 4 sensors (any combination possible of 200G and/or 5000G sensors). It is connected to a PC via a USB link and enables communication between the PC and sensors. It also manages the sensors' internal battery charge. 

The 'HASensor' software allows the user: 

• To enter the measurement configuration details (tools used by the operator during his/her working day, position and orientation of the sensors on these tools). 

• To prepare the sensor(s) for measurement 

• To access - following a period of use of the tools by the operator - the measurements acquired from the sensor(s). 

• To automatically calculate and display the partial (for each tool) and total (for a given operator) exposure values in a simple manner.  

The 'HAViewer' software (optional) allows the user: 

• To display the time-related acceleration measurements in graphic format. 

• To modify the graphics (scale, zoom, plot colour and marker type modifications etc.) 

• To define and add comments to areas on the graphs 

• To select or exclude certain areas or tools and to calculate the impact on vibration exposure 

• To simulate the usage periods of the various tools

• To export the measurements in different formats (viewer, spreadsheet, text) 

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