How to maintain noise tester?
Pay special attention to the noise tester (sound level meter) if not used for a long time, please take the head sound level meter, put in the dry box, to properly protect the sound head.
Send to calibration Department regularly.
When the instrument is used, the battery should be removed in time;
(1) keep the instrument exterior clean;(2) the microphone should be dried and stored when not in use;(3) the microphone diaphragm shall be kept clean and shall not be touched by hand;(4) the instrument is not long, should be monthly electricity 2h, weekly electricity 2H Meiyu season;
