1) There is extraneous extra noise when the wind blows through the microphone. When using the meter in windy conditions, a windshield must be installed to prevent unwanted signals from being acquired.
(2) For a more accurate measurement, separate the microphone from the watch body, so that the result of the undesired sound response will be eliminated.
(3) If the instrument has not been used for a long time or has been operated in a harsh environment, please calibrate the instrument before use.
(4) Do not store or use the meter in a high temperature and high humidity environment.
(5) Keep the microphone dry and avoid violent vibration.
(6) When not in use, please place the battery and the meter in a low humidity environment.
