AS ISO 5349.2:2013 pdf free
AS ISO 5349.2:2013 pdf free.Mechanical vibration – Measurement and evaluation of human exposure to hand-transmitted vibration
The organization of measurements can be approached in four basic ways:
a) Long-term measurement of continuous tool operation
The operation time is long and continuous, and during this time the operator maintains contact with the vibrating surface. In this case the vibration measurement can be made over long periods during the normal use of the power tool. The operation may include changes in vibration magnitude, provided that they are part of the normal working procedure.
In addition to vibration magnitude information, the evaluation of daily vibration exposure requires an evaluation of the duration of exposure to vibration per day.
b) Long-term measurement of intermittent tool operation
The operation time is long but includes short breaks where there is no vibration exposure, however, during the operation and breaks the operator maintains contact with the (vibrating) surface. In this case the vibration measurement can be made over long periods during the normal use of the power tool, provided that any breaks in operation are part of the normal working procedure and that the operator does not lose contact with the power tool or hand-held workpiece, or significantly alter position of his hands on the power tool or hand-held workpiece.
In addition to vibration magnitude information, the evaluation of daily vibration exposure requires an evaluation of the duration of exposure to the operation per day. In this case the duration of exposure to the operation includes the short breaks in vibration exposure and so will be longer than the duration of exposure to vibration.
c) Short-term measurement of intermittent tool operation
In many situations the hand is often taken off the power tool or hand-held workpiece, e.g. the power tool is put down, the hand is moved to a different part of the power tool, or another hand-held workpiece is picked up. In other situations, changes have to be made to the power tools being used, e.g. different abrasive belts or drill bits ftted or alternative power tools used. In these cases short-term measurements can only be made during each phase of the work operation.
In some cases it is difficult, or impossible, to get reliable measurements during the normal work process, due to the exposure durations being too short for measurement purposes. In this case measurements may be made during simulated work operations which artificially arrange longer uninterrupted exposures with work conditions as near to normal as possible.AS ISO 5349.2 pdf free download.
