This instrument adopts advanced digital filtering and digital detection technology (frequency weighted ACZ and time weighted FSI are both calculated through digital filtering and digital detection, and 1/1 octave band filters are also calculated through digital filtering methods), which can simultaneously measure (in parallel) and display the sound level of different time weights (Fast, Slow, Impulse, Peak) and different frequency weights (A, C, Z) (peak Peak only works at C weight), and can also display the sound pressure level of each frequency point of the 1/1 octave band filter in real time (i.e. simultaneously). The instrument has the advantages of high reliability, good stability, and wide dynamic range. This instrument adopts a 160 × 160 dot matrix LCD display with background light display. It has two operation interfaces in Chinese and English, with rich display content and easy user operation. The measurement results can be stored in the instrument for a long time, and can be printed on site or later using a micro printer or sent to a computer for processing through the built-in RS-232 interface.
The measurement accuracy of the sound level meter complies with GB/T3785 (IEC61672) Level 1.
2. The filter meets the requirements of IEC6260 and GB/T3241 for level 1/1 octave band filters.
3. When the dynamic range is greater than 100dB, there is no need to convert the measurement range during measurement.
4. It can simultaneously measure three frequency weights A, C, and Z, and three time weights F, S, and I.
5. Peak noise can be measured according to the peak Cpeak sound level of the new national standard.
6. It can simultaneously measure and display 10 measurement indicators, and also display graphics.
7. The equivalent continuous sound level (Leq) of each frequency point over a period of time can be calculated based on the center frequency point of the 1/1 octave band filter.
8. Complete digital signal processing, wide frequency response range, large dynamic range, and lower background noise.
9. Airport noise can be measured according to standards.
10. It has the function of collecting noise data.
11. Display the time-domain curve of the noise while measuring it.
12. Large capacity MicroSD card (TF card) storage, USB interface and RS232 interface.
13. The instrument has a 2M capacity FLASH memory inside.
1. Execution standard: GB/T3785-2010 (IEC61672:2002) Level 1
2. Microphone: Φ 12.7mm (1/2 ") pre polarized test condenser microphone
3. Frequency range: 10Hz~20kHz
4. Measurement range: 20dB~130dB (A), 23dB~130dB (C), 28dB~130dB (Z)
5. Dynamic range: greater than 100dB (weighted by A)
6. Frequency weighting: Parallel (simultaneous) A, C, Z weighting
7. Time weighting: Parallel (simultaneous) fast (F), slow (S), I (pulse), and Cpeak
8. Detector characteristics: digital detection technology
9. A/D bits: 24 bits
10. Sampling frequency: 48kHz
11. Display: 160 × 160 dot matrix LCD display with LED backlight.
12. Level range: divided into high and low levels, with a linear range of ≥ 100dB for each level. High: 30dB~130dB, Low: 20dB~110dB
LCpeak: High: 70dB~133dB Low: 50dB~113dB
13. Main display content: It can simultaneously measure and display 10 measurement indicators and the curve of sound pressure level changes over time.
Statistical distribution map, cumulative distribution map, 24-hour distribution map, and calculated values of L1~L99. 1/1 real-time spectrogram.
14. Noise spectrum measurement: The instrument can measure 1/1 octave band filter data in real time, calculate and display each center frequency
The instrument can save and display real-time data on the sound pressure level of the rate point.
15. Measurement time setting: Single group measurement time can be selected from 10s, 1min, 5min, 10min, 15min
20min、30min、1h、8h、24h。 Man (set manually within 24 hours).
16. Main measurement indicators: Lxyp, Lxeq, Lxae, Lxmax, Lxmin, LxN, SD, E, DI%.
(X is A, C, Z, Y is F, S, I, N is 5, 10, 50, 90, 95)
17. Airport noise measurement: Airport noise measurement can be conducted and Td, LEPN, LAmax, LA'max can be calculated,
The maximum measurement time is 60 seconds, and the measurement can be manually ended and the results calculated.
18. Collecting noise measurement: Calculate and save the instantaneous sound level for a period of time, and the measurement time can be manually set
19. Data storage: Only F1ash can store 3000 sets of single measurement results or 200 sets of hourly measurement results.
If an SD card is added, the storage capacity can be expanded to a maximum of 2G. It can store more measurement data.
20. Data processing software: Use HS7001 software to read data and SD card data files for post-processing analysis,
And output the report.
21. Data export: The instrument F1ash and SD card data can be output through the RS-232 interface, and can also be connected
Read data files from the SD card through the USB interface.
22. Output: AC output, RS-232 port, USB port.
23. Power supply: 7.5V (5 No. 5 alkaline batteries LR6/AA/AM3) can work continuously for 24 hours.
24. Dimensions: 1 × b × h (mm) 290 × 82 × 40
25. Quality: 400g (excluding battery)
26. Working temperature: -10 ℃~50 ℃, relative humidity 20%~90%
