Calculator for Hand-Arm Vibration

 

1. Find the vibration value for the tool. (Get it from the

      manufacturer look it up at this website umitech. On the

      graph below mark the point on the left side shown as

      Vibration value.

      A graphic title that says, "Vibration" inside a white box with a black outline

 

2.Find out how many total hours per day the employee

     is using the tool and mark that point on the bottom of

     the chart below.

      a graphic title that says, "Duration" and "Hrs." with a black outline

 

3. Trace a line into the graph from each of these two points until they cross.

 a graph of duration and hourse per week that calculates the caution and hazard of an employee using a tool

4. Interpretation

         a. If that point lies in the crosshatched .Hazard. area above the upper curve, then

             the vibration hazard must be reduced below the hazard level or to the degree

             technologically and economically feasible.

          b. If the point lies between the two curves in the .Caution. area, then the job

              remains as a Caution Zone Job..

          c. If the point falls in the .OK. area below the bottom curve, then no further steps

              are required.

 

Note: The caution limit curve (bottom) is based on an 8-hour energy-equivalent frequency- weighted acceleration value of 2.5 m/s2. The hazard limit curve (top) is based on an 8-hour energy-equivalent frequency- weighted acceleration value of 5 m/s2.

 

        Department of Labor and Industries