3 ways to solve common faults of noise meter
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.
What should be paid attention to when using the noise meter?
1) Before use, read the instruction manual to understand the use method and precautions of the instrument.
2) The instrument should not be placed in a place with high temperature, humidity, sewage, dust, air or chemical gas with high content of hydrochloric acid and alkali.
3) Pay attention to the polarity when installing the battery or external power supply, and do not reverse the connection. The battery should be removed when not in use for a long time, so as not to damage the instrument due to leakage.
4) Do not disassemble the microphone, prevent it from being thrown, and place it properly when not in use.
5) Do not disassemble the instrument without authorization. If the instrument is abnormal, it can be sent to the repair unit or the factory for inspection.
6) During use, if there is an undervoltage alarm in the LCD, the battery should be replaced in time.
7) Before the sound level meter is measured, it can be turned on and preheated for 2 minutes, and it can be preheated for 5 to 10 minutes in humid days.
