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Maikoyi (Beijing) Technology Co., Ltd

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No. 107, Front Street, Henan Village, Henan Zhai Town, Miyun County, Beijing

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MKY-AHAI6256 Noise and Vibration Analyzer

NegotiableUpdate on 05/06

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

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Overview

MKY-AHAI6256 Noise and Vibration Analyzer - GB/T 23716-2009 Measurement Instrument for Human Response to Vibration (ISO 8041-1:2017, IDT); $r $n - GB/T 3241-2010 Electroacoustic Octave and Fractional Octave Filters (IEC 61260-1:2014, MOD); $r $n - GB/T 10071-1988 Measurement Method for Environmental Vibration in Urban Areas;

Product Details

MKY-AHAI6256 Noise and Vibration Analyzer

Vibration section

meet the standard

GB/T 237162009 Measuring instruments for human response to vibration (ISO 8041-1:2017, IDT);
GB/T 32412010 Acoustics - Octave and Fractional Octave Filters (IEC 61260-1:2014, MOD);
GB/T 100711988 Measurement Method for Environmental Vibration in Urban Areas;
GB/T 13441.12007 Mechanical Vibration and Shock - Evaluation of Human Exposure to Whole Body Vibration - Part 1: General Requirements (ISO 2631-1:1997, IDT);
GB/T 13441.22008 Mechanical Vibration and Shock - Evaluation of Human Exposure to Whole Body Vibration - Part 2: Vibration inside Buildings (1 Hz~80 Hz) (ISO 2631-2:2003, IDT);
GB/T 14790.12009 Mechanical Vibration - Measurement and Evaluation of Human Exposure to Hand transmitted Vibration - Part 1: Requirements (ISO 5349-1:2001, IDT);
GB/T 14790.22014 Mechanical vibrations - Measurement and evaluation of human exposure to hand transmitted vibrations - Part 1: Practical guidelines for workplace measurements (ISO 5349-1:2001, IDT);
GB/T 50355-2018 Standard for Indoor Vibration Limits and Measurement Methods of Residential Buildings;
JGJ/T 170-2009 Standard for Limits and Measurement Methods of Building Vibration and Secondary Radiation Noise Caused by Urban Rail Transit;
Other relevant standards, etc;

The frequency weighting and its range (with a reference of 10-6 m/s2 and a sensor sensitivity of 40 mV/m · s-2) are shown in the table below.

Frequency weighting and measurement range (sensor sensitivity: 40 mV/m · s-2)

Frequency weighting	Range (dB)	Evaluation Explanation
ap	50 ～ 160	Regardless of rights
Wx	45 ～ 151	Whole body level
Wz	45 ～ 159	Whole body vertical
Wk	45 ～ 160	Seat surface
Wm	45 ～ 155	building

Note 1: The measurement range is related to the sensitivity of the sensor.
Note 2: The measurement range of each frequency weighting is related to the signal frequency, and the range given in the table above is based on the signal frequency of 8Hz.
Low frequency 1/3 OCT range: 50 dB to 160 dB.
Measurement range (sensor sensitivity: 3mV/m · s-2)

Software Name	indicator	measurement range
Work vibration meter (159.2 Hz as reference)	Acceleration (peak)	0.1 m/s2～1400 m/s2
	Speed (rms)	0.1mm/s～1400 mm/s
	Displacement (p-p)	0.001 mm～4 mm
Vibration 1/3 OCT analysis	acceleration	0.1 m/s2～1400 m/s2
Vibration FFT analysis	acceleration	0.1 m/s2～1400 m/s2
Arm vibration measurement	Arm weighted acceleration level	80 dB～180 dB

frequency range

Analyzer function	Frequency range and measurement accuracy
statistical analysis (Human body vibration)	ap/ Wx/Wz/Wm： 1 Hz～80 Hz (±1 dB) Wk： 1 Hz～80 Hz (±1 dB) 0.5 Hz～125 Hz (±2 dB)
Work vibration meter	Acceleration: 8 Hz～3200 Hz (fs=8192 Hz) 12.5 Hz～25000 Hz (fs=65536 Hz) Speed: 8 Hz～1000 Hz (fs=8192 Hz) 16 Hz～8000 Hz (fs=65536 Hz) Displacement: 5 Hz~500 Hz (fs=8192 Hz) 50 Hz~1000 Hz (fs=65536 Hz)
Hand transmitted vibration measurement (Arm vibration)	Wh ： 8 Hz～1000 Hz(±1 dB) 5 Hz～1600 Hz(±2 dB)
low frequency 1/3 OCT analysis	Center frequency: 0.4 Hz to 315 Hz (± 1 dB)
vibration 1/3 OCT analysis (Tolerance: ± 5%)	center frequency 1.6 Hz～2500 Hz (fs=8192 Hz) 12.5 Hz～20000 Hz (fs=65536 Hz)
Vibration FFT analysis	Upper limit frequency: 3580 Hz (fs=8192 Hz) 28640 Hz (fs=65536 Hz)

Time averaged constant

1 s、8 s。

Time averaged method

Exponential average, linear average

Main measurement indicators

Analyzer function	Main measurement indicators
statistical analysis (Human body vibration)	VLmax, VLmin, VLeq, T, 5 Ln (n can be set between 1 and 99) and SD under ap/Wx/Wz/Wm/Wk weighting.
Work vibration meter	Peak value, peak to peak value, effective value, vibration frequency, etc. of acceleration, velocity, displacement
Hand transmitted vibration measurement	Vwhi、VwheqT、Vwheq4h、Vwheq8h
Low frequency 1/3 OCT analysis	Max、Min、Leq,T、 5 Ln (n can be set between 1 and 99), 30 center frequency points AP、SD、 5 synthetic frequency weights (wz, wx, wm, wk, wu)
Vibration 1/3 OCT analysis	Max、Min、Leq,T、 30 center frequency points, acc、vel、disp
Vibration FFT analysis	Max、Min、Leq,T、 820 spectral lines, acc、vel、disp

monitor

3.5-inch color screen with a resolution of 240 × 320

data store

32 MB Flash RAM

Calendar clock

Monthly error less than 1 minute, built-in backup battery

power supply

4 AA alkaline batteries: continuous operation for more than 24 hours under basic functions;
Optional 7.4V/2Ah rechargeable lithium battery;
External power supply: 5 V/1 A, USB Type-C port.
Note: Enabling FFT, 1/3 OCT, recording, Beidou, DTU, and WiFi functions will increase power consumption.

output interface

Communication output RS232、USB、 Bluetooth (optional), DTU (optional), WiFi (optional)

working conditions

Temperature: -10 ℃~50 ℃
Relative humidity: 25% to 90%
Air pressure: 65 kPa to 108 kPa

Dimensions (mm)

215×85×30

weight

About 350 grams

noise part

Microphone

Level 1: AHAI5225 pre polarization test condenser microphone
Level 2: AHAI5221 pre polarization test condenser microphone

Combination sensitivity level of microphone and preamplifier

-36 dB
Note: Sensitivity is based on 1V/Pa as a reference of 0 dB. Unless otherwise specified, all indicators are based on the corresponding sensitivity.

measurement range

1级： 18 dB(A)～144 dB(A)； 30 dB(C)～144 dB(C)； 40 dB(Z)～144 dB(Z)
2级： 25 dB(A)～144 dB(A)； 35 dB(C)～144 dB(C)； 45 dB(Z)～144 dB(Z)
Other frequency linear ranges:
Level 1: 31.5 Hz: 18 dB (A) to 104 dB (A);
12.5 kHz：18 dB(A)～140 dB(A)。
Level 2: 31.5 Hz: 25 dB (A) to 104 dB (A);
12.5 kHz：25 dB(A)～140 dB(A)。
Note 1: When the level is not specified, it indicates the requirements applicable to Level 1 and Level 2, the same applies below.
Note 2: When other sensitivity levels are used, the measurement range of sound pressure level will shift as a whole, and the specific information displayed on the instrument shall prevail.

frequency range

1级： 10 Hz～20 kHz
2级： 20 Hz～12.5 kHz

Frequency weighting

Parallel weighting of A, C, and Z

Time weighting

Parallel F (fast), S (slow), I (pulse)

accuracy

Level 1: Complies with GB/T 3785.1-2023/IEC 61672-1:2013 Level 1
Compliant with GB/T 3241-2010/IEC 61260-1:2014 Level 1
Level 2: Complies with GB/T 3785.1-2023/IEC 61672-1:2013 Level 2
Compliant with GB/T 3241-2010/IEC 61260-1:2014 Level 2

data store

32 MB Flash RAM

Other storage

5 sets of parameter templates, 64 measurement points, 256 calibration records

measure time

1 second to 24 hours

Calendar clock

Monthly error less than 1 minute

data interface

RS232、USB、 DC signal, AC signal, Bluetooth DTU

display

3.5-inch color screen with a resolution of 240 × 320

Power consumption (basic function)

<90 mA/5 V

power supply

4 AA alkaline batteries: continuous operation for more than 30 hours under basic functions;
Optional lithium battery: 7.4 V/2 AH continuous operation for more than 30 hours;
External power supply: 5 V/1 A, USB Type-C port.

host size

Overall dimensions (mm): 285 × 85 × 30;
Host size (mm): 215 × 85 × 30

Temperature: -10 ℃ to 50 ℃.
Relative humidity: 25% to 90%.
Air pressure: 65 kPa to 108 kPa

weight

About 350 grams

Total value points function

Peak C-level measurement range: 60 dB to 146 dB
Main measurement indicators: Lxyi, Lxyp, Lxeq, t, Lxeq, T, Lxymax, Lxymin, Lxpeak, LAE, LC-A, SEL
Note: x is A, C, Z, y is F, S, I

Statistical function (optional)

Number of modules: 2.
Analysis mode: Single or 24-hour optional.
Statistical analysis indicators: Lxyi, Lxyp, Lxeq, T, Lxmax, Lxmin, LxN, SD, SEL.
24-hour mode analysis indicators: Lxyi, Lxyp, Lxeq, T, Lxmax, Lxmin, LxN, SD, SEL, Ld, Ln, Ldn, etc.
Note 1: x is A, C, Z, y is F, S, I, N is 5, 10, 50, 90, 95.
Note 2: After opening Ln, add 7 statistical indicators.

Octave frequency spectrum analysis function (optional)

Filter type: Parallel (real-time) octave band, G=103/10。
Compliant with standard: GB/T 3241-2010 Level 1; GB/T 3241-2010 Level 2.
Filter center frequency:
1级： 16 Hz、31.5 Hz、63 Hz、125 Hz、250 Hz、500 Hz、1 kHz、2 kHz、4 kHz、8 kHz、16 kHz。
2级： 31.5 Hz、63 Hz、125 Hz、250 Hz、500 Hz、1 kHz、2 kHz、4 kHz、8 kHz
Time weighting: F and S.
Real time analysis: Simultaneously complete all center frequencies and A weighting, C weighting, and Z weighting.
Linear range: above 100 dB (Z).
Main measurement indicators: instantaneous sound pressure level in frequency band (Lp), high sound pressure level in frequency band (Max), minimum sound pressure level in frequency band (Min), equivalent continuous sound pressure level in frequency band (Leq, T), noise evaluation NR value, noise evaluation NC value, and language interference level SIL4.

1/3 octave band spectrum analysis function (optional)

Filter type: Parallel (real-time) octave band, G=103/10。
Compliant with standard: GB/T 3241-2010 Level 1;
Compliant with standard: GB/T 3241-2010 Level 2.
Filter center frequency:
1级： 12.5 Hz、16 Hz、20 Hz、25 Hz、31.5 Hz、40 Hz、50 Hz、63 Hz、80 Hz、100 Hz、125 Hz、160 Hz、200 Hz、250 Hz、315 Hz、400 Hz、500 Hz、630 Hz、800 Hz、1 kHz、1.25 kHz、1.6 kHz、2 kHz、2.5 kHz、3.15 kHz、4 kHz、5 kHz、6.3 kHz、8 kHz、10 kHz、12.5 kHz、16 kHz、20 kHz、25 kHz。
2级： 20 Hz、25 Hz、31.5 Hz、40 Hz、50 Hz、63 Hz、80 Hz、100 Hz、125 Hz、160 Hz、200 Hz、250 Hz、315 Hz、400 Hz、500 Hz、630 Hz、800 Hz、1 kHz、1.25 kHz、1.6 kHz、2 kHz、2.5 kHz、3.15 kHz、4 kHz、5 kHz、6.3 kHz、8 kHz、10 kHz、12.5 kHz
Time weighting: F and S.
Real time analysis: Simultaneously complete all center frequency and A weighting, C weighting, Z weighting, and user-defined frequency weighting.
Linear range: above 100 dB (Z).
Main measurement indicators: instantaneous sound pressure level in the frequency band (Lp), high sound pressure level in the frequency band (Max), minimum sound pressure level in the frequency band (Min), and equivalent continuous sound pressure level in the frequency band (Leq, T).

FFT analysis function (optional)

Estimated weights before FFT analysis: A, C, Z weighting
Time weighting: F and S are optional.
FFT analysis line count: 2048 lines.
Analysis frequency upper limit:
1级： 28640 Hz、14320 Hz、7160 Hz、3580 Hz、1790 Hz。
2级： 14320 Hz、7160 Hz、3580 Hz、1790 Hz、895 Hz
Bandwidth Bp per line:
1级： 32 Hz、16 Hz、8 Hz、4 Hz、2 Hz；
2级： 16 Hz、8 Hz、4 Hz、2 Hz、1 Hz。
Window function Win: Flat top window, Brinell window, Hanning window, rectangular window are optional.
Main measurement indicators: fast time weighted instantaneous value, slow time weighted instantaneous value, high sound pressure level (Max), minimum sound pressure level (Min), equivalent continuous sound pressure level (Leq, T) under each spectral line, and measurement duration (Tm).