1Performance
Ningbo HY108B Sound Level MeterIt is a handheld instrument whose performance meets national standardsGB/T 3785－2010And standardsIEC 61672:2013The Sound Level Meter2levelXRequirements for Class Sound Level Meters. This sound level meter is a newly launched fully digital sound level meter by the company. It is lightweight and easy to carry, suitable for on-site measurement of mechanical and electrical product noise, environmental noise, traffic noise, workplace noise, etc. It can also be used for teaching demonstrations in universities.
2、 Ningbo HY108B Sound Level MeterMain technical parameters and performance
2.1Performance level:GB/T3785andIEC616722level.
2.2Measured evaluation quantity:L_P(Time weighted sound level)perhapsL_max(Large time weighted sound level)、L_min(Small time weighted sound level)、L_Cpeak(CWeighted peak sound level).
2.3, transmission sound Tool:HY205type2Grade engineering measurement microphone, nominal diameter12.7 mmFree field type frequency response. The nominal sound pressure sensitivity is50 mV/PaThe nominal sound pressure sensitivity level is-26 dBThe reference value is1 V）.
2.4Frequency range:20 Hz～16 kHz.
2.5Frequency weighting:ACalculation rightsCCalculation rights.
2.6Time weighting:F(fast response)、S(slow response).
2.7Measurement range:ASound level:30 dB～130 dB；CSound level:40 dB～130 dB.
2.8Threshold setting range:30 dB～130 dBWhen the sound level exceeds the threshold, a threshold exceeding flag is given and a high level is output.
2.9Automatic calibration range:±4.5dBThe reference value is50mV/Pa）.
2.10Display:128×64Dot matrix LCD display（LCD）, resolution0.1dB,It has indicators such as overload, under range, low battery voltage alarm, and over threshold alarm.
2.11Analog output: The output jack is3.5 mmDual channel headphone jack, low load impedance10kΩ.
——DC logarithmic voltage: The output voltage is related to the logarithm of the measured sound pressure, and the unit sound pressure output voltage is15 mV/dB.
——AC linear voltage: The output voltage is linearly related to the measured sound pressure, corresponding to the output voltage at the upper boundary of the level range2.0V.
2.12Digital output: The output connector isDB9Type male head (needle type),RS232Serial communication port, outputASCIICode, modulation rate (baud rate) is9 600 Bd.
2.13Power supply:2jointLR6type(5name)Battery, capable of continuous operation under reference environmental conditions27h.
2.14External dimensions：long×wide×thick210 mm×68 mm×31 mm.
2.15、 Weight:210 g.
2.16Operating temperature range: 0℃～40℃.