Main technical indicators and functions:
1. Measurement range: (with 2 × 10-5Pa as reference)
1) A-level: 30-135dB;
2) C-level: 40-130dB
2. Frequency range: 20Hz to 12.5kHz
3. Detector characteristics: LMS true RMS, peak factor: 3
4. Time weighting: F (fast), S (slow), maximum value retention.
5. 5. Measurement time setting: Man (manual), 10 s、1min、5 min、10 min、　　　　　　　　　　15 min、20 min、1h、4h、8h、24h、Regular( (Full time).
6. Automatic measurement function: Leq, L5, L10, L50, L90, L95. Lmax, SD, Ld, Ln, Ldn, and 1/1 spectrum, etc.
7. Filter characteristics: 1/1 octave band; Center frequencies: 31.5Hz, 63Hz, 125Hz, 500Hz, 1kHz, 2kHz, 4kHz, 8kHz
8. Automatic storage of measurement data: 500 sets of single data, 50 sets of hourly data, and 50 sets of filter automatic measurement data.
9. Interface: RS-232C, can be connected to a matching printer and communicate with a microcomputer to print measurement data and output spectrum histograms.
10. Calibration: Use HS6020 sound level calibrator, sound level: 94dB, frequency 1kHz.
11. Display: 54mm × 24mm large screen LCD digital display, with analog meter hands, measurement method, measurement time and clock, and 1/1 center frequency display function.
12. Power supply: 5 LR6 high-energy alkaline batteries, DC 7.5V, and equipped with an external power input socket.
III Others:
1. Select attachments: calibrator, extension cable (5/10/15m), tripod.
2. Dimensions: Host: 240mm × 81mm × 31mm, Printer: 178mm × 81mm × 31mm
3. Weight: The host weighs about 400 grams, and the printer weighs about 410 grams.
4. Basic configuration: Host, printer (including rechargeable battery and external power supply), shelf, CD, carrying case, hood.