Now, whether in life or work, there is inevitably a lot of noise. The generation of noise has an impact on our life and work. Noise meter is mainly used to measure environmental noise, do noise engineering, quality control and health prevention.
The noise meter is generally composed of a condenser microphone, a preamplifier, an attenuator, an amplifier, a frequency meter network, and an RMS indicator. Common faults of noise meters generally have the following problems:
1. The display has no display
(1) The internal battery connection is disconnected or the battery contact is not good: Solder the connection and replace the battery contact piece.
(2) The battery is damaged: replace the battery.
2. The measurement reading is obviously low or the calibration is less than 94.0dB.
(1) Microphone sensitivity is too low or damaged: replace the microphone and recalibrate.
(2) The contacts of the preamplifier are not in good contact with the microphone: clean the contacts.
(3) The plug of the preamplifier is not in good contact with the socket of the host: replace the plug and socket.
3. When the sound level is measured, the reading is too high, and the ground wire of the preamplifier is in poor contact: tighten the outer sleeve.
