Analysis of daily failure factors of noise meter
We all know that vibration will produce noise, such as: rotating machinery, impact, resonance, friction, etc., as well as noise generated by flow field, environmental noise, noise generated by combustion, and other noises. The generation of noise has an impact on our life and work. If you want to know the size of the noise, you need a noise measuring instrument.
Noise meter, also known as (noise meter, sound level meter) is the basic instrument in noise measurement. A sound level meter is generally composed of a condenser microphone, a preamplifier, an attenuator, an amplifier, a frequency meter network, and an effective value indicating meter. The working principle of the sound level meter is: the microphone converts the sound into an electrical signal, and then the preamplifier transforms the impedance to match the microphone with the attenuator. The amplifier adds the output signal to the network, performs frequency weighting on the signal (or an external filter), and then amplifies the signal to a certain amplitude through the attenuator and the amplifier, and sends it to the RMS detector.
The noise meter is mainly used to measure environmental noise, do noise engineering, quality control and health prevention and control. For example, it is used for noise measurement in various occasions such as factories, offices, traffic roads, audio systems, homes, air conditioners, refrigerators, etc. Then, Zhuhai Tianchuang Instrument Co., Ltd. summarizes some daily fault analysis and solutions for noise meters:
1. There is no display on the 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 host socket: replace the plug socket.
3. The reading is too high during low sound level measurement, and the ground wire of the preamplifier is not in good contact: tighten the outer sleeve.
