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when the dosimeter is initially calibrated, the operator should check the meter to ensure that the meters are reading the same value. in addition, the calibration chart provided with the dosimeter shows two columns of four values. a meter reading of 120 dba is in the leftmost column. for the rightmost column, select a different angle of elevation and repeat the test. if the readings are the same for both columns, the dosimeter is calibrated. the safety of the operator is your responsibility to ensure that the dosimeter is functioning properly. follow the instructions on the calibration chart carefully when checking the dosimeter's meter. it is a good idea to check the dosimeter at the start of the shift and then again after the shift to confirm that the dosimeter is functioning properly. a meter reading of 120 dba is not acceptable.the dosimeter is designed to record only noise levels up to 120 dba. if the noise level in the work area exceeds 120 dba, the worker will receive an overexposure, and appropriate protective equipment should be worn. you can adjust the dosimeter meter to record noise levels above 120 dba. however, you must do this with caution. the dosimeter is intended for workers to wear at all times during the day. when workers are required to do any work other than the work they are hired to do, the dosimeter will record noise levels that are much higher than 120 dba. if noise readings on the dosimeter exceed 120 dba, the worker should wear appropriate protective equipment. the dosimeter is intended to be worn on the left ear.
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