Non binding guide to good practice for implementing Directive

ANNEX G GlossaryHand-arm vibrationThe mechanical vibration that, whentransmitted to the human hand-arm system,entails risks to the health and safety ofworkers, in particular vascular, bone or joint,neurological or muscular disordersDeclared vibration emissionThe vibration value provided by machinemanufacturers to indicate the vibration likelyto occur on their machines. The declaredvibration emission value should be obtainedusing a standardised test code, and has to beincluded in the machine’s instructions.Frequency-weightingA correction applied to vibration measurements(often using a fi lter) to allow for the assumedfrequency dependence of the risk of damageto the body. The W hweighting (defi ned inEN ISO 5349-1:2001) is used for hand-armvibration.Daily vibration exposure, A(8)The 8-hour energy equivalent vibration totalvalue for a worker in meters per secondsquared (m/s²), including all hand-armvibration exposures during the day.Partial vibration exposure, A i(8)The contribution of operation i to the dailyvibration exposure in m/s². The partial vibrationexposure relates to the daily exposure from anindividual tool or process, i (where a workeris only exposed to vibration form one tool orprocess then the daily vibration exposure isequal to the partial vibration exposure).Health surveillanceA programme of health checks on workers toidentify early effects of injury resulting fromwork activities.Exposure action valueA value for a workers daily vibration exposureof 2.5m/s², above which the risks fromvibration exposure must be controlled.Exposure limit valueA value for a workers daily vibration exposureof 5m/s², above which workers should not beexposed.Exposure timeThe duration per day that a worker is exposureto a vibration source.PART I Guide to good practice on Hand-Arm Vibration – ANNEXES A-H47