AS ISO 5349.1:2013 pdf free

AS ISO 5349.1:2013 pdf free.Mechanical vibration – Measurement and evaluation of human exposure to hand-transmitted vibration
Measurement of hand-transmitted vibration shall be undertaken using instrumentation conforming to the requirements of ISO 8041. This equipment shall be checked for correct operation before and after use.’ The calibration shall be traceable to a recognized standard maintained by an accredited laboratory.
For practical vibration measurements, the orientation of the coordinate system may be defined with reference to an appropriate basicentric coordinate system (see Figure 1) originating， for example, in a vibrating appliance,workpiece, handle or control device gripped by the hand (see ISO 8727 for further information).
The vibration in the three directions should preferably be measured simultaneously. Measurements made sequentially along each of the three axes are acceptable, provided the operating conditions are similar for all three measurements. The measurements shall be made on the vibrating surface as close as possible to the centre of the gripping zone of the machine, tool or workpiece. The location of the transducers shall be reported.
In some cases it may not be possible to make vibration measurements in three axes. If measurements are made only in one or two axes, the axis of greatest vibration shall be included (where this can be identified). The vibration total value shall be estimated using the measured values available and a carefully considered multiplying factor.The vibration magnitude in the axis of greatest vibration requires a multiplying factor in the range 1,0 to 1,7 to give the vibration total value (for further advice, see ISO 5349-2). Where a multiplying factor is used to estimate the vibration total value, the multiplying factor and a justification for the choice of value shall be reported, together with the component value(s) measured.
Daily exposure duration is the total time for which the hand(s) is(are) exposed to vibration during the working day.The vibration exposure time may be shorter than the time for which the person is working with the power tools or workpieces. It is important to base estimates of total daily exposure duration on appropriate representative samples for the various operating conditions and durations and their intermittency (see ISO 5349-2 for further guidance).AS ISO 5349.1 pdf free download.