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.
The vibration transducer may be an accelerometer which may be designed to make general vibration measurements (for non-percussive tools) or may be specifically designed for large peak accelerations such as those produced by percussive tools.
The vibration transducers shall be able to withstand the range of vibration magnitudes and shall have stable characteristics. The dimensions of the transducers shall be such that they do not interfere with the operation of the machine and such that the location of the point of measurement can be identified.
ISO 5349-2 contains further guidance on the selection of transducers.
Location and orientation of transducers
The vibration transmitted to the hand shall be measured and reported for three directions of an orthogonal coordinate system such as defined in Figure 1.
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.
NOTE The vibration magnitude can vary considerably with position on the vibrating surface.
Further guidance on transducer positioning is given in ISO 5349-2.AS ISO 5349-1 pdf download.
