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FOUR CHANNEL VIBRATION ANALYSER

//FOUR CHANNEL VIBRATION ANALYSER
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FOUR CHANNEL VIBRATION ANALYSER

HD2030 is a portable vibration analyzer performing spectral and statistical analysis onfour channels simultaneously. The instrument measures all parameters required by current regulations concerning workers protection from vibration related risks and is able to measure vibrations transmitted to both hand-arm and whole body.

HD2030 has been designed combining maximum flexibility and easy of use with the possibility to update the instrument according to the evolution of regulations concerning vibrations. The user can directly update the instrument firmware by means of the program Noise & Vibration Studio supplied with the instrument.

The HD2030 satisfies the specifications of standards ISO 8041:2005, ISO 5349-1:2001 (handarm vibrations) and ISO 2631-1, 2 and 4 1997 (whole-body vibrations). Octave and third octave filters satisfy class 1 specifications of IEC 61260 standard.

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Applications

The HD2030 analyzer executes all measurements required by the European regulations concerning workers protection from mechanical vibration exposition at the workplace (2002/44/EC). The choice to perform hand-arm (HA) or whole body (WB or BV) measurements modifies the frequency range of spectral analysis. For hand-arm measurements the range goes from 3.15Hz up to 3.15kHz (from 4Hz to 2kHz for octave band spectrum), while for whole body measurements the range of central frequencies is shifted downward from 0.32Hz up to 315Hz (from 0.5Hz to 250Hz for octave band spectrum).

The HD2030 is suitable for the evaluation of workers exposure to vibrations and to assess the risk of injury in the following cases:

vibrations transmitted to hand-arm system through vibrating tools or items subject to vibrations or impacts,
vibrations transmitted to whole body system through the seat of transport vehicles, vibrations transmitted to whole body system by vibrating floors or seats at the workplace,
vibrations transmitted to whole body system by buildings with vibrations or impacts.

The HD2030 is a vibration analyzer suitable for the following applications:

Vibration spectral analysis by octave to third octave bands,
Statistic analysis with percentile calculation from L1 to L99,
Evaluation of vibration attenuation of anti-vibration gloves, seats and materials, Structural verification of buildings.

Technical standards

HD2030 vibration analyzer conforms to the following standards:
ISO 8041:2005 “Human response to vibration – Measuring instrumentation”
ISO 5349-1:2001 “Mechanical vibration – Measurement and evaluation of human exposure to hand-transmitted vibration – General requirements”
ISO 5349-2:2001 “Mechanical vibration – Measurement and evaluation of human exposure to hand-transmitted vibration – Practical guidance for measurement at the workplace”
ISO 2631-1:1997 “Mechanical vibration and shock – Evaluation of human exposure to whole body vibration – General requirements”
ISO 2631-2:1989 “Evaluation of human exposure to whole body vibration – Continuous and shock-induced vibrations in buildings (1 to 80 Hz)”
IEC 61260:1995 “Electroacustics – Octave band and fractional-octave band filters”

The HD2030 vibration analyzer detects accelerations on four axes through two accelerometers with integrated amplifying electronics (IEPE or equivalent type). Three axes are grouped in the right input, where it is possible to connect three accelerometers or a tri-axial one; the fourth axis is associated to left input. Accelerometers with integrated electronics allow using standard cables to achieve low impedance and low noise connections between the accelerometer and the instrument, simplifying its use and decreasing the probability to get wrong or altered measurements, because of interferences or electromagnetic disturbances.

The HD2030 analyzes accelerometer signals and makes calculations simultaneously on four axes. The instrument calculates, in parallel for all the measurement channels, weighted acceleration values and octave or third octave spectra; acceleration, velocity or displacement values can be shown for each frequency band. Frequency weightings can be freely chosen according to the specific application. Together with values of instantaneous and mean acceleration, the analyzer calculates in addition peak levels, vibration dose (VDV), crest factors and performs statistical analysis.

As statistical analyzer HD2030 calculates the probability distribution of a measurement parameter in 1dB classes. Both the probability distribution graph and the percentile levels from L1 up to L99 are available. The measurement of acceleration on four axes allows, as an example, to measure vibration transmitted to the driver body through the vehicle seat isolating driver movements or to evaluate, during design and production verification, the damping effectiveness of seat suspension and absorbing material in general. In building analysis it is possible to correlate the signal of the hammer used to excite the structure with the signal received by a high sensitivity tri-axial accelerometer.

A flexible data logger function stores multiple profiles and spectra either into the internal 8MB memory or into a memory card (SD up to 2GB). When needed, it’s possible to add to profiles the logging of accelerometer signals, directly recording the digital samples. Analysing stored data, it’s useful to examine accelerometer signals in order to verify the absence of artefacts like, for example, those generated by DC-shift. Each recording can be documented including a vocal comment. Besides HD2030 can be used like an audio recorder, another possibility to document the measurements.

The “Navigator” program available in the analyzer, allows to examine logged measurements and to hear vocal comments.

For a quick instrument setting the HD2030 can store up to nine setups, customized by the user according to specific applications. The desired setup can be easily identified through the associated title.

Calibration can be performed using either accelerometer calibration data or using a vibration generator. The last 120 performed calibrations are written in a register file and logged in a reserved and protected area of the instrument permanent memory.

The interface program Noise & Vibration Studio, included with the instrument, adds automatically the calibration file to the measurements when downloading data into the PC memory.
HD2030 can be completely controlled by a PC, through the RS232 and USB serial interfaces, using a special communication protocol.

Software The interface program Noise & Vibration Studio is provided with the instrument and allows to download and visualize data logged in the instrument and to manage setups, sensor configurations and calibration register file.

Instrument settings can be customized by the user and stored with a title in a setup file for later use. In order to easily perform different kind of measurements it is possible to upload up to nine instrument settings, selected from the setup file. Sensor configurations can be set either manually, filling in the accelerometer data table, or automatically, using the CD provided with the accelerometers supplied by Delta Ohm.

The HD2030 stores calibration information in a reserved area of internal memory. The calibration register file is downloaded to PC memory together with logged data and stored in the same folder.

Several optional analysis modules can be activated by means of license. The program can be automatically updated through the web and includes demonstrative versions of all modules.

NS1 Application module “Workers’ Protection”:
Analysis of workers’ exposure to noise and vibration, both hand-arm and whole-body, in accordance with Decree Law n.81/2008 9432/2008 and UNI.
Evaluation of hearing protectors with the methods and OBM SNR according to UNI EN 458.
Evaluation of measurement uncertainties in accordance with UNI 9432/2008.
Calculation of the impulsiveness of noise sources according to the requirements of UNI 9432/2008.

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