HAND-ARM VIBRATION EXPOSURE CALCULATOR INSTRUCTIONS AND DEFINITIONS
- Insert your input values in the white areas, in one or more of the six Tool or process rows.
(More than one row is required where the individual is exposed to vibration from more than one tool or process within the same day.)
- After entering the data, click Calculate button.
- The outputs will appear in the light green areas.
(light green cells will remain blank if valid input data have not been entered.)
To clear the calculator of all values, click on the Reset button.
- The Vibration magnitude is the frequency-weighted r.m.s. acceleration value in m/s2 for each Tool or process.
- The Exposure duration is the total daily vibration contact time or "trigger time" for each Tool or process.
It may be expressed in any combinations of hours and/or minutes but must not exceed 24 hours.
- The Exposure points per hour is the rate at which exposure will rise at the specificed Vibration magnitude.
(The Exposure points system is a simple alternative to the A(8) value for describing and managing exposures in the workplace.
The exposure action value (EAV) is equivalent to 100 points and the exposure limit value (ELV) is equivalent to 400 points.)
- The Time to reach EAV is the time required to reach the exposure action value (EAV) of 2.5 m/s2 A(8).
- The Time to reach ELV is the time required to reach the exposure limit value (ELV) of 5 m/s2 A(8).
- (The Exposure points per hour, Time to reach EAV and the Time to reach ELV are calculated from the Vibration magnitude for each Tool or process.)
- The Partial exposure is the vibration exposure, expressed in m/s2 A(8) and in exposure points, for each Tool or process.
It is calculated from the Vibration magnitude and the Exposure duration.
- The Total exposure, also in m/s2 A(8) and in exposure points, is calculated from all the Partial exposures.
- Note: A partial or total exposure will not be calculated if the corresponding exposure duration exceeds 24 hours.
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