Hangzhou Aihua Instruments AWA6228+ Multifunction Sound Level Meter (16～142dBA)

Microphone + Preamplifier: 1/2” prepolarized condenser microphone+ Preamplifier (Sensitivity Level: -28dB)

Correction Function: Diffusion field correction in order to comply with standards ANSI S1.4

Preamplifier: AWA14601 removable preamplifier

Frequency Range: 10 Hz ~ 20 kHz ± 1 dB (not including microphone)

Total Measurement Range:

Low range: (20～132)dBA, (25-132)dBC, (30-132)dBZ 

High range: (16～142)dBA, (35-142)dBC, (40-142)dBZ 

Self-generated Noise: <12 dB(A), 17 dB(C), 22 dB(Z)

Frequency Weighting: Parallel (simultaneous) A, C, Z, B, D and user1&2-defined weighting

Time Weighting: Parallel (simultaneous) F, S, I, Peak

A/D Bits: 24 bits

Sampling Frequency: 48 kHz

Calibration: Using Sound Calibrator Class 1 model AWA6221A

Correction Function: Diffusion field correction in order to comply with standards ANSI S1.4

Delay Time: The meter can delay 0~99s after pressing start measuring button

Back Erase Function: Elimination of undesired noise; example barking dogs, cars, doors

Display: 240×320 color screen, adjustable brightness, backlight can be closed

Display Resolution: 0.1 dB

Low battery indication: Symbol  indicate low battery

Data Storage (32 Mb FLASH RAM.SD card is optional)

3328 groups of integrating measuring results only.

3328 groups of statistical results only (‘statistical 1’ and ‘statistical 2’ analysis index are same.)

2663 groups of statistical results only (‘statistical 1’ and ‘statistical 2’ analysis index are different.)

Print: Mini-printer

Internal Clock: Error less than 1 min/month

Output Interface

AC Output (full scale): 1.0V AC RMS; Output Impedance: 1k Ω; Connector: φ3.5 mm stereo plug

DC Output: 20mV/dB; Output Impedance: 1k Ω; Connector: DB-9 plug

RS232 Interface: To computer for output some measurement results instantaneous values , also to mini-printer for printing

Transmission speed: 4800, 9600,115200 bps

USB Interface: available and no need device drive. Allow USB to be controlled via communication commands

Power Supply: 4×LR6 alkaline battery or rechargeable batteries

5 V external power supply

Battery Life: Longest time of 30 hours continuously with 4×LR6 alkaline battery

Dimensions: 260 (H) x 80 (W) x 30 (D), mm.

Weight: 0.35 kg. (include batteries)

EMC: Type X

Environment

Working Temperature: -10 ~ 50 °C,

Storing Temperature: -20 ~ 70 °C,

Relative Humidity: 25 ~ 90 %

Accessories: AC adaptor, USB cable, RS232 transmission cable, windscreen, hand strap, windscreen fall prevention rubber, carrying case, U-disk, user’s manual

Bluetooth Module: Wireless printing