YDS135 Series Sound Level Meter

The HY114 Digital sound level meter is designed to measure the frequency density of sound a specific area. The meter is able to display the A sound level and C sound level, This meter conforms with the International standard IEC 651-1979 for Class I requirement, therefore, the application range is wide: for mechanical test, electronic test, vehicle noise test and vehicle horn inspection.

Automatic measurement and data processing of noise can be realized by computer controlled instruments It has good electromagnetic shielding, anti-collision and anti-extrusion functions, and is more suitable for use in high-temperature and high-pollution environments.

Executive Standard

1. GB 3836.1-2010 "Explosive Atmospheres Part 1: General Requirements for Equipment";
2. GB 3836.4-2010 "Explosive Atmospheres Part 4: Equipment Protected by Intrinsic Safety Type "i"";
3. GB 3096-2008 "Acoustic Environment Quality Standard";
4. GB/T 3241—2010 and IEC 61260:2014 "Electroacoustic Octave and Fractional Octave Filters";
5. GB/T 3785—2010 and IEC 61672:2013 "Electroacoustic Sound Level Meter";
6. GB 12348 —2008 "Environmental Noise Emission Standards at the Boundary of Industrial Enterprises";
7. GB/T 15952—2010/IEC 61252:2002 "Specifications for Electroacoustic Personal Sound Exposure Meters";
8. GB 22337—2008 "Emission Standards for Social Living Environment Noise";
9. HJ 640 —2012 "Environmental Noise Monitoring Technical Specifications for Routine Monitoring of Urban Acoustic Environment"; HJ 661-2013

HY Model :

1. Sound Level HY 104
1. Sound Level HY 114
1. Sound Level HY 108
1. Sound Level HY 118
1. Sound Level HY 128
1. Sound Level YSD 135

1. Available Measurement : L XY (X=A, C or Z, Y=F, S or I), L XY max , L XY min , L Cpeak , 1s L eq , L eq , L E , E , D , L eq, 8hn , L N ( N =1~99, choose 5), s ,L h , L d , L e , L n , L dn , L den , L A f , L C f , L Z f
2. Measurement microphone : HY207 prepolarized test condenser microphone (grade 1), free-field type Frequency response, nominal diameter 12.7 mm, nominal sensitivity 50 mV/Pa (nominal sensitivity level is -30dB, reference value 1 V/Pa)
3. Frequency range : 10 Hz-20 kHz (level 1)
4. Frequency weighting : A weighting, C weighting, Z weighting
5. Time weighting : F (fast), S (slow), I (impulse)
6. Low frequency A weighting : low-pass filter, cut-off frequency 224.5 Hz (for secondary radiation noise measurement)
7. Sound level measurement range: A weighting: 28 dB~135 dB, C weighting: 40 dB~135 dB, Z weighting: 45 dB~135 dB
8. Sound exposure measurement range : 0.001 Pa 2 s~999 Pa 2 s, 0.278 Pa 2 h~9 999 Pa 2 h, automatic unit conversion
9. Noise dose measurement range : 0.001%~9 999%, exchange rate 3 dB, standard judgment sound level is 85 dB
10. Integration time : manual setting, measurement duration is 1 s~99 h 59 min 59 s
11. Display : 128x128 dot-matrix liquid crystal display (LCD), resolution 0.1 dB; quasi-analog indicator, resolution 1 dB; can display 1/3 octave and 1 /1 octave spectrogram. At the same time, it has signs of overload, under range, low battery voltage, etc.
12. Filter : 1/1 octave center frequency (Hz): 16, 31.5, 63, 125, 250, 500, 1000, 2000, 4000, 8000, 16000
13. 1/3 octave center frequency (Hz): 16, 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1000, 1250, 1600, 2000, 2500, 3150, 4000, 5000, 6300, 8000, 10000, 12500, 16000, 20000
14. Analog output : 3.5 mm two-channel headphone jack, minimum load impedance 10 kΩ
1. DC logarithmic output: unit voltage output rate 15 mV/dB, 450 mV ~ 1950 mV in the total measurement range, (that is, corresponding to the measurement range When the upper limit is 130 dB, it is 1950 mV, and when the lower limit is 30 dB, it is 450 mV)
2. AC linear output: the output voltage has a linear relationship with the measured sound pressure, corresponding to the upper limit of the measurement range, and the root mean square value of the output voltage is 2.0 V
15. Digital Output : USB B socket, DB9 male (needle type), RS232 serial communication port, output ASCII code, external RD-V32-SN portable micro thermal printer or RG-MDP58C dot matrix printer
16. Storage Device : SD card, 8 G (up to 32 G is optional)
17. Power supply : 2 AA Huatai batteries or Nanfu batteries
18. Dimensions : L x W x T 210mm x 68mm x 31mm
19. Weight : 210 g (incl battery)
20. Operating temperature range : Class 1 sound level meter: -10°C~ 50°C