What are the solutions to the common faults of the noise meter
Nowadays, whether it is in life or work, it is inevitable that there will be a lot of noise. The generation of noise has an impact on our life and work. The noise meter is mainly used to measure environmental noise, do noise engineering, quality control and health prevention and control.
The noise 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 common faults of the noise meter generally have the following problems:
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.
Noise meter - operation steps
1. Open the carrying case of the noise meter, take out the noise meter, and put on the sensor.
2. Put the noise meter in state A, check the battery, and then calibrate the noise meter.
3. Adjust the measurement range of the instrument according to the common environmental sound level scale.
4. Measurement: Fast (to measure the instantaneous value of an environment with a large change in sound pressure level), slow (to measure the average value in an environment with a small change in sound pressure level), pulse (to measure a pulsed sound source), filter ( Measure the sound level of the specified frequency band) Various functions are used for measurement.
5. Record the measurement data.
6. After the measurement is completed, it is recommended to check the sensitivity of the noise meter with an acoustic calibrator to ensure the accuracy and reliability of the measurement data.
7. Organize the equipment, disassemble the sensor and battery, and put them back in the designated place.
