This instrument adopts advanced digital detection technology, which has the advantages of high reliability, good stability, wide dynamic range, and no need for range conversion.

Main purpose:This instrument can be widely used for measuring industrial noise from various machines, vehicles, ships, electrical appliances, etc. It can also be used for measuring environmental noise, labor protection, and industrial hygiene.

Main accessories:The main accessories include external power supply (non explosion proof), AWA8731 transmission cable, USB data cable, AWA8711 windproof cover, etc.

Main technical performance:

(1) Microphone: AWA14421 pre polarized test condenser microphone, with an outer diameter of Φ 12.7 mm (1/2 "). Nominal sensitivity: approximately 30 mV/Pa. The frequency range is 20 Hz to 12.5 kHz. Its nominal free field response in the reference incident direction is shown in Appendix A

(2) Measurement range: 30-130 dBA, 35-130 dBC, 40-130 dBZ

(Using 2 × 10)^-5Pa as reference, the same below)

(3) Frequency range: 20 Hz to 12.5 kHz

(4) Frequency weighting: A, C, Z weighting, the response in the free field is shown in Appendix B

(5) Time weighting: F (fast), S (slow), I (pulse)

(6) Main measurement functions: integral measurement, statistical analysis, personal sound exposure measurement, data recording and recording, octave spectrum analysis (optional)

(7) Main measurement indicators: LFp、LSp、LIp、Leq,t、Lpeak、Leq,T、LFmax、LFmin、LSmax、LSmin、LImax、LImin、SEL、Lex8h、LAVG、TWA、DOSE、Ln1、Ln2、Ln3、Ln4、Ln5、SD、Ts、Tm、Volt、E class

(8) Execution standards: GB/T 3785-2010 Class 2 and IEC 61672:2002 Class 2

(9) Display: 128 × 64 dot matrix OLED

(10) Data storage: 2GB Flash RAM

(11) Number of storage groups: up to 8000 groups

(12) Other storage: 32 sets of combined parameters, 128 measurement points, and 128 calibration records.

(13) Integral time: 1 second to 24 hours

(14) Data recording:
Record content: Time weighted sound pressure levels and short-term equivalent sound levels for F, S, and I levels
Sampling interval: 0.01s to 6.00s for time weighted sound level, 0.1s to 60s for short-term equivalent sound level
(15) Recording time: 1 second to 24 hours

(16) Recording:
Recording accuracy: 32kHz/16bit, 16kHz/16bit, 8kHz/8-bit optional

Trigger method: Synchronize with integral measurement or record the specified time after exceeding the limit. When set to over limit start, the recording time ranges from 10 seconds to 90 seconds

The maximum recording time is 9 hours at 32kHz/16bit, 18 hours at 16kHz/16bit, and 72 hours at 8kHz/8-bit.

(17) Output interface: PWM output, AC, DC, USB, RS-232 to computer or micro printer

Attention: The output interface is only for use in safe areas!

(18) Calibration: Use a Level 2 or higher sound level calibrator

(19) Dimensions: l × b × h (mm): 210 × 68 × 27 (mm)

(20) Quality: 240g

(21) Usage conditions: Temperature: -20 ℃~+50 ℃

Relative humidity: 25% to 90%

Air pressure: 65kPa~108kPa

(22) Octave frequency spectrum analysis function (optional)

Filter type: Parallel (real-time) octave band, G=10^3/10

Compliant with standards: IEC 61260-1995 Class 2, GB/T 3241-2010 Class 2

Filter center frequencies: 31.5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz, 4 kHz, 8 kHz.

Time weighting: F (Fast weighting)

Real time analysis: Simultaneously complete all center frequencies and A weighting, C weighting, and Z weighting.

Linear range: above 90dB

Main measurement indicators: instantaneous sound pressure level in frequency band (Lp), maximum sound pressure level in frequency band (Lmax), minimum sound pressure level in frequency band (Lmin), equivalent continuous sound pressure level in frequency band (LeqT)