HY128B type multifunction sound level meter Features: 1 Multi-functional fully digital sound level meter 2 personal sound exposure meters and noise dosimeters 3-octave and 1/3-octave analyzers (optional) 4. Simultaneously measure various frequency-weighted and time-weighted sound levels 5 Low-frequency weighting, suitable for secondary radiation noise measurement 6. Equipped with a standard lithium battery for power supply 7. It has recording and scheduled power-on/off functions Optional Bluetooth and positioning (including Beidou and GPS) functions Technical Specifications: 1. Performance level: Level 2 as specified in GB/T 3785.1-2023 / IEC 61672-1:2013. 2. Measured evaluation parameters: LXY (X=A, C, or Z, Y=F, S, or I), LXYmax, LXYmin, LCpeak, 1sLeq, Leq, LE, E, Dose, LAeq, 8hn, LN (N=1~99, select any 5), SD, Lh, Ld, Le, Ln, Ldn, Lden, Lav, TWA, LeqC-A, etc 3. Microphone: HY205 Type, Class 2 engineering measurement microphone, with a nominal diameter of 12.7 mm and a free-field frequency response. The nominal sound pressure sensitivity is 40 mV/Pa (nominal sound pressure sensitivity level is -28 dB, with a reference value of 1 V). When calibrated with a sound calibrator, the self-sound field correction value is 0.2 dB at a calibration frequency of 1 kHz. 4. Frequency range: 20 Hz to 12.5 kHz. 5. Frequency weighting: A-weighting, C-weighting, Z-weighting. 6. Time weighting: F (fast response), S (slow response), I (impulse response). 7. Measurement range: A-weighted sound pressure level: 20 dB to 144 dB; C-weighted sound pressure level: 30 dB to 144 dB; Z-weighted sound pressure level: 40 dB to 144 dB. 8. Sampling frequency: 48 kHz. 9. Display: 2.8-inch OLED color display with a resolution of 240×320 and a resolution power of 0.1dB, featuring indicators for overload, out-of-range, and low battery voltage alarms. 10. Digital output: The output connector is a DB9 male (pin type) RS232 serial communication port with a modulation rate (baud rate) of 9600 Bd, which can be externally connected to an RD-V32-SN portable micro thermal printer. 11. Analog output: direct logarithmic voltage and AC linear voltage. 12. Storage: TF card, 32 Gibit (up to 64 Gibit optional). 13. Power Supply: Equipped with a built-in 3.7 V 6000 mAh lithium battery for power supply, and also supports external power supply. 14. Instrument power: not exceeding 1.5 W. 15. Overall dimensions: length × width × thickness 250 mm × 78 mm × 30 mm. 16. Weight: 360g. 17. Operating temperature range: 0℃~40℃.
HY128B type multifunction sound level meter Features: 1 Multi-functional fully digital sound level meter 2 personal sound exposure meters and noise dosimeters 3-octave and 1/3-octave analyzers (optional) 4. Simultaneously measure various frequency-weighted and time-weighted sound levels 5 Low-frequency weighting, suitable for secondary radiation noise measurement 6. Equipped with a standard lithium battery for power supply 7. It has recording and scheduled power-on/off functions Optional Bluetooth and positioning (including Beidou and GPS) functions
