Specific Operation Steps and Common Faults of Noise Meters
1. Selection of noise meter usage environment: Select representative testing locations, and the sound level meter should be kept away from the ground and walls to reduce the additional impact of reflected sound from the ground and walls.
2. The weather conditions require that during periods of no rain or snow, the noise meter should keep the microphone diaphragm clean. A wind cover must be added to prevent wind noise interference when the wind speed is above level three, and measurements should be stopped when the wind speed is above level five.
3. Open the noise meter carrying case, take out the noise meter, and put on the sensor.
4. Place the noise meter in measurement mode, check the battery, and then calibrate the noise meter.
5. Refer to the table (commonly used environmental sound level reference) and adjust the measurement range.
6. Below, various functions can be used for measurement, including fast (measuring instantaneous values in environments with large changes in sound pressure levels), slow (measuring average values in environments with small changes in sound pressure levels), pulse (measuring pulse sound sources), and filter (measuring sound levels in specified frequency bands).
7. Record data as needed, and also connect to a printer or other computer terminal for automatic collection. Organize equipment and return it to the designated location
Common faults of noise meters
1. No display on the monitor
(1) Internal battery wiring disconnected or poor battery contact: Weld the wiring and replace the battery contact piece. (2) Battery damage: Replace the battery.
2. The measurement reading is significantly low or cannot be calibrated to 94.0dB.
(1) The sensitivity of the microphone is too low or damaged: replace the microphone and recalibrate it.
(2) The contact between the preamplifier and the microphone is not good: clean the contact.
(3) The plug of the preamplifier is not in good contact with the host socket: replace the plug socket.
3. The reading is high during low sound level measurement, and the ground contact of the preamplifier is poor: tighten the outer sleeve.
