Before using this product, please read this instruction manual carefully to ensure optimal performance and longevity.
Before using this product, please read this instruction manual carefully to ensure optimal performance and longevity. This large digital noise level meter can be applied to measure noise levels in various environments such as offices, homes, music rooms, karaoke rooms, and shopping malls. ■ Operating Procedure Insert the 5V plug, connect the 1A AC/DC adapter, and turn the power rocker switch ON. In the initial setting, the frequency weighting is set to A (dBA). Press the "SET" key once to toggle the alarm mode ON/OFF. Alarm ON: LED lights up, Alarm OFF: LED turns off. Press and hold the "SET" key for more than 2 seconds to enter the alarm setting mode. After all digital displays blink, press the "SET" key. Adjust the alarm sound level using the "MAX/MIN/▲" key or the "FAST/SLOW/▼" key, and press and hold the "SET" key for more than 2 seconds to save the value and return to normal measurement mode.
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By pressing the MAX/MIN/▲ key, you can sequentially select the maximum and minimum measurement values, and the corresponding LED will light up. By pressing the dBA/dBC key, you can select the frequency weighting A or C sequentially, and the corresponding LED will turn on. By pressing the FAST/SLOW/▼ key, you can sequentially select fast response and slow response. If the alarm setting is turned ON, when the real-time measurement reaches the alarm level, the buzzer will sound for 3 seconds, the LED will continue to blink at that moment, and the value will be held for 3 seconds before returning to normal mode. ■ Specifications Measurement range: 30-130dBA, 35-130dBC. Frequency range: 31.5Hz to 8.5KHz. Accuracy: ±1.5dB (Calibration frequency of the sound source is 94dB@1KHz.) Frequency weighting: A or C weighting Digital display: 3 large LED digital display Resolution: 0.1dB < 100dB, 1dB > 100dB Display mode: Fast and slow selection available Microphone type: Dia. 6mm ECM type Alarm function: Built-in alarm buzzer Operating voltage: USB DC5V 1A Operating temperature and humidity range: 0-40℃
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Sound level meter
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