Noise Meter Daily Failure Factor Analysis
It is well known that the vibration will produce noise, such as: rotating machinery, impact, resonance, friction, etc., and the flow of noise generated by the place, environmental noise, noise generated by combustion, other noise. The generation of noise brings us the influence of life and work. To know the size of the noise we need to use noise measuring instruments.
Noise meter is also called (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 RMS indicator head. The working principle of a 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, weights the signal for frequency (or external filter), and then amplifies the signal to a certain amplitude by the attenuator and amplifier, and sends it to the RMS detector.
Noise meters are mainly used to determine the environmental noise, do noise engineering, quality control and health prevention. Such as for factories, offices, traffic roads, audio, family and air conditioning, refrigerators and other occasions of noise measurement. So, the following Zhuhai Tianchuang Instrument Company for you to summarize a few noise meter daily failure analysis and solutions:
1、No display on the monitor
(1) Internal battery disconnected or battery contact is not good: weld the line, replace the battery contact piece. (2) Battery damage: replace the battery.
2, the measurement reading is obviously low or calibrated when the school is not 94.0dB.
(1) microphone sensitivity is too low or damaged: replace the microphone and recalibrate.
(2) Preamplifier contact with the microphone contact is not good: cleaning contact.
(3) The plug of preamplifier is not in good contact with the socket of the host: replace the plug and socket.
(3) The reading is high when measuring low sound level , and the ground wire of preamplifier has bad contact: tighten the outer sleeve.
