HY104B handheld sound level meter

1、 Performance
HY104B handheld sound level meterIt is an instrument with standard extension cable, and its performance meets national standardsGB/T 3785－2010And standardsIEC 61672:2013The Sound Level Meter2levelXThe requirement for a class sound level meter is that the preamplifier of the sound level meter is set to be removable, and the microphone can be easily connected to the sound level meter body through an extension cable, keeping the measurer away from the noise source. It is suitable for on-site measurement of mechanical and electrical product noise, environmental noise, traffic noise, workplace noise, etc.
IIHY104B handheld sound level meter Main technical parameters and performance
2.1Performance level:GB/T3785andIEC616722level.
2.2Measured evaluation quantity:L_P(Time weighted sound level)、L_max(Large time weighted 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）.

2.4Analog output: The output jack is3.5 mmDual channel headphone jack, low load impedance10 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 is30 mV/dBEach level range is+300 mV～-1500 mVThe upper and lower boundaries corresponding to each level range are-1500 mVand+300 mV.
——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 range
0.5 V.
2.5Frequency weighting:ACalculation rightsCCalculation rights.
2.6Time weighting:F(fast response).
2.7Measurement range:ASound level:30 dB～130 dB；CSound level:40 dB～130 dBDivided into three levels of scope:
Low gear:30 dB～90 dB； Middle gear:50 dB～110 dB; High end70 dB～130 dBHand selected.
2.8Display:128×64Dot matrix LCD display（LCD）, resolution0.1dB,It has signs such as overload, under range, and low battery voltage alarm.

2.9Extension cable:HY7017Type extension cable, standard configuration3m, customizable by users, with a length of up to50m.

2.10Power supply:2joint6F22type9 VStacked battery, capable of continuous operation under reference environmental conditions10 h.
2.11External dimensions：long×wide×thick276mm×74mm×25 mm.
2.12、 Weight:520g.
2.13Operating temperature range: 0℃～40℃.

2.15Frequency range:20 Hz～16 kHz.