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

  • Name:
    MEWOI-7228+-OCT/1/3OCT/FFT analysis/Noise Dosimeter/data logging Color Screen Type 1 industrial grade Sound Level Meter/Tester
  • Model No.:
    MEWOI-7228+
  • Main Features:
    Calculates all the popular noise dose parameters
  • Price
OEM/ODM Testing Instruments Manufacturer
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MEWOI-7228+-OCT/1/3OCT/FFT analysis/Noise Dosimeter/data logging Color Screen Type 1 industrial grade Sound Level Meter/Tester

MEWOI-7228+-multifunction-sound-level-meter.06.800.jpg


INTRODUCTION

MEWOI7228+(Type 1) multifunctional sound level meter is a new generation of noise measurement instrument using digital signal processing technology, and it is an upgraded product of MEWOI7228. The measurement range is super wide, the function is stronger, the power consumption is lower, and it is matched with color LCD. A, C, Z three parallel (simultaneous) frequency weighting and F, S, I three parallel (simultaneous) time weighting can simultaneously measure a variety of evaluation indicators. There are many functions of analysis. Statistics, integral, 1/1 OCT, 1/3 OCT, FFT and digital recording can be started synchronously or asynchronously. Modular design, users can choose and buy according to their needs.

The instrument can be widely used in environmental protection, labor hygiene, industrial enterprises, scientific research and teaching, etc. It can complete environmental noise measurement, sound power level measurement, noise measurement of machinery and equipment, and building acoustic measurement.

MAIN FEATURES


1,Super linear range larger than 122 dB (A), high and low range, each measuring range larger than 112 dB (A).
2,2.6 inch color screen display, resolution 240 * 320, readable in sunlight, rich display content, brightness can be automatically adjusted.
3,Data storage: 3MB standard, up to 3328 groups of integral measurement results.
4,Large capacity storage: maximum support for 32GB SD card (optional).
5,Quick Setting: Select the applicable standard or measurement method, automatically set the analyzer mode and parameters required by relevant standards, and turn off the unnecessary analysis function, which is more convenient to use and save electricity.
6,Users can obtain different measurement ranges by configuring microphones with different sensitivities.
7,It has the function of automatic switching between battery and external power supply.
8,Startup mode: keys, overrun, timing, equal interval.
9,Automatic turn-on/turn-off: Timing automatic switch.
10,GPS positioning system can be embedded in the interior, and accurate position information and motion speed can be obtained at the same time of measuring noise.
11,Bluetooth module can be embedded in the system, which can print the measurement results wirelessly or operate the instruments by mobile phone (optional).
12,External micro printer can print measurement results on site (optional).
13,External GSM wireless data transmission module, the measurement results can be sent to the designated mobile phone or computer through SMS in time (optional).
14,External solar cell module can work in the field for a long time (optional).

THE MAIN TECHNICAL INDEXES


Fulfils Standards

IEC 61672 Class 1

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

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

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

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

Bluetooth Module (Optional)

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

 OPTIONAL FUNCTIONS

Type & Name

Main function

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)

Selection Guide

Model No.Applied StandardsMeasured and evaluated itemsMicrophoneFrequency WeightingsTime Weightings:Measuring RangeScreenIntegrationThreshold Setting
output

MEWOI-JY208C.80.png

MEWOI-JY208C

GB/T3785,Class 2;

IEC61672,Class 2

Lp , Lmax , Lmin, LCpeak .Class 2 industrial measurement microphone, nominal diameter 12.7 mmA,CF(Fast) and S(Slow)A:30-130dB,C:40-130dB128 *64 dot matrix liquid crystal display (LCD)
Analog/Digital

MEWOI-JY208C.80.png

MEWOI-JY208D

GB/T3785,Class 2;

IEC61672,Class 2

Lp , Lmax , Lmin, LCpeak .Class 2 industrial measurement microphone, nominal diameter 12.7 mmA,CF(Fast) and S(Slow)A:30-130dB,C:40-130dB128 *64 dot matrix liquid crystal display (LCD)
Analog

MEWOI-JY208C.80.jpg

MEWOI-JY208

GB/T3785,Class 1;

IEC61672,Class 1

Lp , Lmax , Lmin, LCpeak .Class 1 industrial measurement microphone, nominal diameter 12.7 mmA,CF(Fast) and S(Slow)A:30-130dB,C:40-130dB128 *64 dot matrix liquid crystal display (LCD)
Analog/Digital

MEWOI-JY208C.80.jpg

MEWOI-JY208B

GB/T3785,Class 1;

IEC61672,Class 1

Lp , Lmax , Lmin, LCpeak .Class 1 industrial measurement microphone, nominal diameter 12.7 mmA,CF(Fast) and S(Slow)A:30-130dB,C:40-130dB128 *64 dot matrix liquid crystal display (LCD)
Analog

MEWOI-JY208C.80.jpg

MEWOI-JY218B

GB/T3785,Class 2;

IEC61672,Class 2

Lp , Lmax , Lmin, LCpeak .Class 2 industrial measurement microphone, nominal diameter 12.7 mmA,CF(Fast) and S(Slow),ImpulseA:30-130dB,C:40-130dB,Z: 45dB~130 dB128 *64 dot matrix liquid crystal display (LCD)Analog/Digital

MEWOI-JY208C.80.jpg

MEWOI-JY218

GB/T3785,Class 1;

IEC61672,Class 1

LP、Leq、LAE、L5、L10、L50、L90、L95、Lmax、Lmin、LCpeak、EAClass 1 industrial measurement microphone, nominal diameter 12.7 mmA,C,ZF,S,IA:30-130dB,C:40-130dB,Z: 45dB~130 dB128 *64 dot matrix liquid crystal display (LCD)Analog/Digital
MEWOI6636-0.80.pngMEWOI-6636-0

GB/T3785,Class 2;

IEC61672,Class 2

Lp、Lmaxclass 2 AF、S35~130 dBA3 1/2 LCD

Analog/Digital
MEWOI6636.80.pngMEWOI-6636-1

GB/T3785,Class 2;

IEC61672,Class 2

Lp、Lmaxclass 2A,C,ZF、S35~130 dBA128 *64 dot matrix liquid crystal display (LCD)
Analog/Digital
MEWOI6636.80.pngMEWOI-6636-2

GB/T3785,Class 2;

IEC61672,Class 2

Lp、Lmax、Lmin、SEL、E、Leq,T、Tmclass 2A,C,ZF、S35~130 dBA128 *64 dot matrix liquid crystal display (LCD)Analog/Digital
MEWOI6636.80.pngMEWOI-6636-3

GB/T3785,Class 2;

IEC61672,Class 2

Lp、Leq1s、Lmaxclass 2A,C,ZF、S、I35~130 dBA128 *64 dot matrix liquid crystal display (LCD)Analog/Digital
MEWOI6636.80.pngMEWOI-6636-4

GB/T3785,Class 2;

IEC61672,Class 2

LFp、LSp、LIp、Leq,t、Lpeak、Leq,T、LFmax、LFmin、LSmax、LSmin、LImax、LImin、SEL、Lex8h、LAVG、TWA、DOSE、L5、L10、L50、L90、L95、SD、E.class 2A,C,ZF、S、I、Peak35~130 dBA128 *64 dot matrix liquid crystal display (LCD)Analog/Digital



label:  Sound level tester OCT/1/3OCT/FFT Type 1 Sound Level Meter Decibelímetro-Digital Medidor-de-Nível-de-Pressão-Sonora-Digital

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