Sound Level Meter HY104

The HY104 sound level meter is a hand-held instrument whose performance complies with the national standard GB/T 3785－2010 and the international standard IEC 61672:2013 "Sound Level Meter" for Class 2 Class X sound level meters. It is suitable for electromechanical applications. On-site measurement of product noise, environmental noise, traffic noise, and workplace noise.

Specifications

• Performance level: GB/T3785 and IEC61672 level 2.
• Measured evaluation quantity: LP (time-weighted sound level), Lmax (maximum time-weighted sound level)
• Microphone: HY205 type 2 engineering measurement microphone, nominal diameter 12.7 mm, free-field frequency response. The nominal sound pressure sensitivity is 50 mV/Pa (the nominal sound pressure sensitivity level is -26 dB, and the reference value is 1 V).
• Frequency range: 20 Hz～16 kHz.
• Frequency weighting: A weighting, C weighting.
• Time weighting: F (fast response).
• Measuring range: A sound level: 30 dB～130 dB; C sound level: 40 dB～130 dB, divided into three levels:
• Low gear: 30 dB～90 dB; Middle gear: 50 dB～110 dB; High gear: 70 dB～130 dB, hand-selected.
• Display: 128×64 dot matrix liquid crystal display (LCD), resolution 0.1dB, with signs of overload, under-range, low battery voltage, etc.
• Analog output: The output jack is a 3.5 mm dual-channel headphone jack, and the minimum load impedance is 10 kΩ.
• ——DC logarithmic voltage: The output voltage is related to the logarithm of the measured sound pressure, and the output voltage is related to the level range. The unit sound pressure output voltage is 30 mV/dB. The range of each level is +300 mV～-1500 mV, and the upper boundary and lower boundary of each level range are -1500 mV and +300 mV respectively.
• ——AC linear voltage: The output voltage is linearly related to the measured sound pressure, and the output voltage corresponding to the upper boundary of the level range is 0.5 V.
• Power supply: 2 6F22 type 9 V laminated batteries, which can work continuously for 10 hours under reference environmental conditions.
• Dimensions: length × width × thickness 256 mm × 74 mm × 25 mm.
• Weight: 500 g.
• Operating temperature range: 0℃～40℃.

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