ČSN EN ISO 8041-2 - Vibrace působící na člověka - Měřicí přístroje - Část 2: Osobní vibrační expozimetry

3.9 transient acceleration artefact

event or effect that can alter the computation of workers’ (3.5) daily exposure to vibration

Note 1 to entry: For a PVEM (3.1), it is essential to log sufficient information to identify transient acceleration artefacts for the purpose to treat them in real time or in the post-processing.

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Reference environmental conditions

Reference environmental conditions for specifying the performance of a personal vibration exposure meter are the following:

— air temperature: 23 °C;

— relative humidity: 50 %.

Performance specifications

General characteristics

Common characteristics

A personal vibration exposure meter (PVEM) is a vibration measurement system meeting the relevant requirements of ISO 8041-1 with the additional capability to monitor personal exposures up to a full working day.

Since personal vibration exposure meters are instruments capable of measuring and computing daily vibration exposures they are simple to use and implement (internal complexity hidden from the user) and automatic (i.e. they do not require manual post-processing or computations), while displaying accurate and reliable results. Hence, as compared to general-purpose vibration meters, PVEM shall run algorithms that replace as much as possible any required manual signal post-processing.

Particularly, one design goal is to identify measurement events or periods that might need to be rejected and that could be automatically discarded from the vibration exposure computation using artefact rejection algorithms. Those automatic artefacts rejection algorithms are an additional feature of PVEM as compared to general-purpose vibration meters. In operation PVEMs are typically left unattended.