Things to note when calibrating a sound level meter
Sound level meter is the most basic noise measurement instrument. It is an electronic device instrument, but it is different from objective mechanical electronics such as ammeter. When converting sound data signals into electronic signals, it is possible to simulate the time characteristics of the human ear's response rate to sound wave frequencies; The compressive strength characteristics that change when there are different sensitivity characteristics and different tones. A sound level meter is a subjective electronic device instrument.
1) Before application, it is necessary to read the instructions in the article and master the operation methods and common problems of the instrument.
2) The instrument should be prevented from being placed in areas with high temperature, wet and cold conditions, wastewater, dust, gases or organic chemical vapors with high sulfuric acid and alkali content.
3) Pay attention to the optical rotation when installing rechargeable batteries or external power sources, and avoid connecting them in reverse. Long term use of rechargeable batteries is not necessary to prevent liquid leakage from damaging the instrument.
4) Do not disassemble or assemble the microphone, avoid throwing it, and place it securely when not needed.
5) Do not disassemble or assemble the instrument without authorization. If the instrument is abnormal, it should be sent to a maintenance company or factory for repair.
6) During the entire application process, if an undervoltage protection alarm occurs on the LCD screen, the battery should be replaced immediately.
7) Before measuring the sound level meter, start heating for 2 minutes and heat for 5 to 10 minutes on wet and cold days.
Sensitivity calibration
To ensure the accuracy of the measurement, calibration should be carried out before and after application.
Coordinate the sound pressure level calibrators with each other on the microphone, turn on the calibration switch power, load the calibration value, adjust the sensitivity resistor of the noise meter, and perform calibration.
