MEWOI-7228+-OCT/1/3OCT/FFT analysis/Noise Dosimeter/data logging Color Screen Type 1 industrial grade Sound Level Meter/Tester,Decibelímetro Digital,Medidor de Nível de Pressão Sonora Digital

IEC 61260 Class 1

IEC61252:2002

IEC 60651:2001 Type 1

IEC 60804: 2000 Type 1

ANSI S1.4: 1983 Type 1

ANSI S1.4A:1985 Type 1

ANSI S1.43:1997 Type 1

ANSI S1.25:1991

Microphone+preamplfier

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

Note: Sensitivity is 1V/Pa with reference to 0dB. If there is no specific description below, all indicators should be matched with sensitivity.

Preamplifier

AWA14601 removable preamplifier

Frequency Range

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

Total Measurement Range

High range: (30～142)dBA, (35-142)dBC, (40-142)dBZ

Note: When other sensitivities are applied, the measurement range of sound pressure level will be deviated as a whole, depending on the display of the instrument.

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

Measurement Parameters

Lxyp, Lxyi, Lxeq,1s, Lxeq,T, LAE, E, Cpeak, LAFmax, LAfmin, LAfeqT, LAseqT, LAieqT.

Note: X is A, C, Z and Y is F, S, I

A/D Bits:

24 bits

Sampling Frequency

48 kHz

Calibration

Using Sound Calibrator Class 1 model AWA6221A

Correction Function

Press 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

2.6inch 240×320 color screen, adjustable brightness, backlight can be closed

Note: Screen does not display when backlight is turned off

Display Resolution

0.1 dB

Low battery indication

Symbol  indicate low battery

Data Storage

(32 Mb FLASH RAM.

SD memory card is optional)

Ø  3328 groups of integrating measuring results only.

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

Ø  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

Bluetooth Module (Optional)

Can communicate with smart phone and realize wireless control sound level meter

AWA6228+ host

Host hardware part (Don’t include transducer and software), box, transfer software.

Model MEWOI24601 Preamplifier

Pre-amplify, gain is 0 dB.

Model MEWOI24423 measuring microphone

1/2", Prepolarized condenser microphone, 10 Hz ~ 20 kHz,  50 mV/Pa.

Windscreen S 80

Reduce the affection of wind

AH40 Mini-printer

Print measuring result, include connecting line, print paper

extension cable with 5, 10 or 20 m

For  MEWOI24601 and MEWOI7228+ host:

7228+ -10100 Integral software

The noise integral measuring:

MAIN MEASUREMENT INDEXES: Lxyi, Lxyp, Lxeq, t, Lxeq, T, Lxmax, Lxmin, Lxpeak, LAE, LC-A, SEL

Note: x is A, C, Z, y is F, S, I

Peak C Sound Level Measurement: The lower limit is 80 dB lower than the upper limit.

Data storage: up to 3328 groups.

7228+ -10101 Statistics analytical software

The statistical analysis, 24 hours noise monitors automatically:

MAIN MEASUREMENT INDEXES: Lxyi, Lxyp, Lxeq, T, Lxmax, Lxmin, LxN, SD, SEL

Note 1: x is A, C, Z, y is F, S, I, N is 5, 10, 50, 90, 95

Note 2:24H Measurement Indicators: In addition to statistical analysis of all menu measurement indicators, there are Ld, Ln, Ldn

Data storage: Statistical analysis results and 24H measurement results can be stored.

Statistical 1 and 2 analysis indicators are the same: up to 3328 groups.

Statistical 1 and 2 analysis indicators are different: up to 2663 groups.

Statistical analysis can select any central frequency of 1/1 OCT or 1/3 OCT (1/1 OCT or 1/3 OCT software is needed)

7228+ -10202 The OCT analysis software

Noise real-time OCT spectral analysis:

Frequency weighting: parallel A, C, Z.

Time weighting: parallel F, S, low frequency less than 125 Hz with S weighting.

Level linear range: greater than 90 dB, 1 range.

Filter type: parallel (real-time) octave, G = 103/10

Filter center frequency: 11 center frequencies

Data storage: up to 3328 groups.

7228+ -10303 The 1/3OCT analysis software

Noise real-time 1/3OCT spectral analysis:

Frequency weighting: parallel A, C, Z, B, D, T, U.

Time weighting: parallel F, S, low frequency less than 125 Hz with S weighting.

Level linear range: greater than 90 dB.

Filter type: parallel (real-time) octave, G = 103/10

Filter center frequency: 33 center frequencies plus extended F0

Data storage: up to 1664 groups

7228+ -10404 The FFT analysis software

Noise real-time FFT spectral analysis:

Level 1 Linear range: greater than 90 dBZ, 1 range.

Window function: flat-top window, Brinell window, Hanning window and spacing window are optional.

FFT analysis line number: 2048 line

Data storage: up to 121 sets of notes: Group 122 can not be fully recorded.

7228+ -00013 The Noise Dosimeter software

Noise dosimeter measuring:

Sound pressure level measurement range: (20-142) dBA

Peak C sound level measurement range: (50-145) dBC

Noise dose measurement range: 0% to 999.99%.

Exchange rate: 3, 4, 5, 6 are optional.

2.4 Threshold: 40-90 optional

2.5 Standard Limit: 70-90 Optional

MAIN MEASUREMENT INDEXES: LASp, LASmax, TWA, LEX, 8h, LCpeak, LZpeak, LASmin, LAeq, T, LAVG, DOSE

7228+ -00509 The Data Logging software

Do data logging

7228+ -00508 The Reverberation Time Measurement software

Reverberation Time Measurement

32G SD memory card& recording

GPS positioning modular

Bluetooth function

Tripod (1.46m Height)