State owned Hongsheng HS5633B Universal Sound Level Meter

One Application scope and characteristics:
The HS5633B universal sound level meter is innovatively developed according to the requirements of the new standard for sound level meters. It is equipped with A and C frequency weighting networks, maximum value maintenance, high and low range, overload and underload digital indicators, and AC/DC signal output functions. It is suitable for measuring environmental, traffic noise, mechanical and electrical noise, as well as building acoustics, electroacoustic measurements, etc. The instrument has stable performance, is easy to use, and has the advantages of compact structure, small volume, and light weight. Specially suitable for on-site measurement of various types of noise. The instrument performance meets the requirements of Level 2 in the JJG188-2002 Sound Level Meter Calibration Regulations and IEC61627 Sound Level Meter standards.
II Main technical indicators and functions:
1. Sound level measurement range: (with 2 × 10-5Pa as reference)
1) 35～130dB（A）；
2) 40～130dB（C）。
2. Frequency range: 20Hz to 12.5kHz;
3. Frequency weighting characteristics: A, C weighting;
4. Level range and gear setting:
1) L (low): 35dB~100dB (reference range),>100dB overload indication;
2) H (high): 65dB~130dB, with underrange indication below 65dB and overload indication above 130dB.
5. Time weighting and retention settings: Fast feature F (fast); HOLD: Maintain maximum instantaneous sound level;
6. Display: 50mm x 20mm three and a half digit LCD display with a resolution of 0.1dB and an update rate of approximately once per second;
7. Sound calibration: HS6020 (94dB, 1000Hz);
8. Power supply: DC 7V~9V, using one 9V stacked battery;
9. AC signal output: maximum effective value of about 2V, impedance of 600 ohms;
10. DC signal output: 0.3V~1.3V (varying by 0.1V/10dB, load impedance 1M Ω).
III Other:
1. Optional accessories: calibrator, 5M extension cable;
2. Size: 246mm × 70mm × 30mm;
3. Quality: 260g (with battery);
4. Basic configuration: host, hood, clock driver, aluminum alloy box;