Common Problem-Solving Methods for Noise Meters
The generation of noise has an impact on our daily life and work. To determine the magnitude of noise, a noise measuring instrument is required.
A noise meter, also known as a sound level meter, is a fundamental instrument used in noise measurement. A sound level meter generally consists of a condenser microphone, preamplifier, attenuator, amplifier, frequency meter network, and effective value indicator head. The working principle of a sound level meter is that the sound is converted into an electrical signal by a microphone, and then the impedance is transformed by a preamplifier to match the microphone with an 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 attenuators and amplifiers before sending it to the effective value detector.
Noise meters are mainly used to measure environmental noise, conduct noise engineering, quality control, and health prevention and control. Used for measuring noise volume in various occasions such as factories, offices, transportation roads, audio systems, homes, as well as air conditioning, refrigerators, etc. So, Zhuhai Tianchuang Instrument Company has summarized several daily fault analysis and solutions for 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.
