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소음측정기(Sound Meter) ▷ 저주파 FFT소음계
저주파 FFT소음계
  모델명 : TYPE-6238L
  원산지 : 일본
  제조사 : ACO
  가   격 : 문의
  분류명 : 소음측정기, Low frequency sound Level meter
product
제품사양
적용사례
기술자료
 

 

Low frequency sound pressure level meter

TYPE-6238L

In accordance with growing environment conservation, the evaluation of environmental noise such as traffic noise or industrial equipment noise, or better understanding of the labor health environment at offices, factories, etc. are getting more important than ever before. On-site measurement of environmental noise is strongly expected to have high resolution and real-time analyzing function on the spot.
Low frequency sound pressure level meter,Precision Sound level meter TYPE-6238L displays its greatest force in these cases.
In Low frequency sound pressure level meter TYPE-6238L , replacing the card with G-card enables to measure G-weighted sound pressure level and 1/3-octave real-time analysis. This equipment is symbolizing the next-generation sound level meter with extremely high resolution and reliability.
In Precision Sound level meter TYPE-6238L , the function can be extended quite easily to those such as measurement of various parameters, only by inserting option FFT Analysis Card into the card slot.

Windscreen for wind power system measurement

Windscreen for wind power system measurement

This dedicated windscreen is used for wind power system noise measurement, provided with all the required performance; wind noise reduction, waterproof property and acoustic transparency.*

This outstanding performance was realized by the specified sheet device developed through the business-academia collaboration of ACO Co., Ltd., Shizuoka University and Tomoegawa Co., Ltd, which offers exceptional and non-conventional capability of water-proof and almost 100% acoustic transparency.

*This dedicated windscreen has been developed through the business-academia collaboration of Shizuoka University, Tomoegawa Co., Ltd. and Aco Co., Ltd.

Function Enhancement -Program card (SD card)-

Function Enhancement -Program card (SD card)-

Replacing the card with SD card (option) enables to add the specified analyzing function to TYPE6238L.

- 1/1 and 1/3-octave Real-time analysis card

- FTT analysis Card

- RSR card (Real Sound Recording Card)

G-weighted sound pressure level (TYPE-6238L)

G-weighted sound pressure level1/3-octave

Replacing the card with G-card enables to measure G-weighted sound pressure level and 1/3-octave real-time analysis.

Frequency characteristics of microphone

TYPE7146NL is the field type electret condenser microphone which complies with IEC651 TYPE1.

It has also wide dynamic range and frequency range, as well as high sensitivity.

It is easy to operate, free from need of supplying DC bias voltage.

Frequency characteristics of microphone

Ultralow-frequency sound level analysis

Ultralow-frequency sound level (1Hz~) can be analyzed by using Low frequency sound pressure level meter TYPE6238L , Sound card TYPE8833, and FFT analyzer 'SpectraPLUS Pro'.

Ultralow-frequency sound level analysis

 

 

item
Type
TYPE6238L
Name

Low frequency sound pressure level meter

Applicable Standards

JIS C 1514:2002 ClassI
ISO 7196:1995

Frequency Range

FLAT(DR:1~500Hz)
FLAT(FLAT:1~100Hz)
G-weighted sound pressure level:LG(G ISO 7196 Reference)
1/3-octave(FLAT:1~80Hz)

Microphone Type
(Sensitivity)

TYPE 7146NL(-28dB, Stand-alone -26dB)

Level Range Control

FLAT,G-weighted sound pressure level
20~80dB, 20~90dB
30~100dB, 40~110dB
50~120dB, 60~130dB

Frequency analysis band

1/3-octave
1Hz,1.25Hz,1.6Hz,2Hz,2.5Hz,3.15Hz,4Hz,5Hz
6.3Hz,8Hz,10Hz,12.5Hz,16Hz,20Hz,25Hz,31.5Hz
40Hz,50Hz,63Hz,80Hz,OA,AP,G

Measurement Level

G:40dB~130dB
FLAT:50dB~130dB
1/3-octave:30dB~130dB

Overload characteristic

+3dB from upper limited scale

Self-noise level

The lower limit of the measurement range in dB lies 8dB higher than self-noise level.

Time weighting

Fast,Slow,10sec

Frequency weighting

G(Digital),FLAT

Measurement items

Low frequency sound pressure level(L DR )
Low frequency sound pressure level(L F )
G-weighted sound pressure level(L G )
Equivalent continuous sound pressure level(L eq )
Maximum sound pressure level(L max )

Measurement time

1s,3s,5s,10s,1min,5min,10min,15min,30min,1h,8h,12h,24h
Manual(Max. 199h59m59s)

Sampling Time

20.8μs(L DReq ,L DRmax ,L Peq ,L Pmax )
666μs(L Geq ,L Gmax )

Data clear Function

Pause, and a function that deletes preceding 3 or 5 sec. dat
Memory start;Selectable Auto or Manual

Timer function

A marker can be set to start and stop the measurement at any specified moments.

Display

Liquid crystal and Backlight(128×64 points)
Display range:4digit display
Display cycle:display Period : 1s
Bar display : Display Period:0.1s
Warning :Over:+3dB from upper limited scale
        Under:-0.6dB from lower limited scale
Battery : 5 steps display
Date : year/month/day/hour:minute:second

Calibration signal

Electric calibration with internal oscillator (20Hz sine wave)

Output

AC Output:φ2.5Jack
Output:1Vrms(FS)
Output impedance:600Ω
Load impedance:more than 10kΩ
DC Outputφ2.5Jack
Output:2.5V(FS),0.25V/10dB
Output impedance:50Ω
Load impedance: more than 10kΩ

RMS detection circuit

True RMS detection circuit(digital computing type)

Processing

Digital

Pause

Normal temporary pause function, as well as the function of canceling the data before pausing the measurement, are available.

Data Storage Functions

Sound pressure level or Processed values stored in built-in Memory or Memory card
Manual Storage:Sound level, Calculation value, Memory time,Store the Sampling to Built-in memory or on Memory card,
Auto Storage:Sampling interval 100ms, 200ms, sound level,Leq etc. Processing Card :Storage of calculation results

I/O

Direct output to printer, control and output data to computer Digital output of real-time noise waveform with USB interface

Comparator Output

Comparator Function with threshold level

Battery

Four 1.5V Alkaline cells IEC type LR6, Optional AC adapter
Battery life(continuous time):Alkaline dry cell ; Approx.9hours
when Switch on a back light ;Approx.1/3
Consumption ampere:150mA (6V input) when processing function is OFF

Operating temperature

Temperature:-10-~50℃
Humidity:30%~90%RH(no condensation)

Size

85(W) x 328(H) x 48(D)

Weight

Less than APPROX 450g(including Batteries)

Type

TYPE6238L

Name

Precision Sound level meter

Applicable Standards

JIS C1509-1 :2005 classI
IEC 61672-1:2002 ClassI

Frequency Range

20Hz-12.5kHz(Conforms with measurement law)
1Hz~20kHz(Z)
20Hz~20kHz(A)

Microphone Type
(Sensitivity)

TYPE 7146NL(-28dB, Stand-alone -26dB)

Level Range Control

10dB step 6step
20~80dB, 20~90dB
30~100dB, 40~110dB
50~120dB, 60~130dB

Measurement Level

A:28~130dB
Z:39~130dB

Overload characteristic

+3dB from upper limited scale

Self-noise level

The lower limit of the measurement range in dB lies 8dB higher than self-noise level.

Linearity Range

75dB

Time weighting

Fast,Slow

Frequency weighting

A,Z

Measurement items

Sound pressure level(L p )
A-weighted sound pressure level(L A )
Equivalent continuous A-weighted sound pressure level(L Aeq )
Sound Exposure level(L AE )
Maximum sound pressure level(L Amax )
Minimum sound pressure level(L Amin )
Percentile sound pressure level(5 freely selectable values
L AN )
Peak Sound Pressure level(L peak )
Power average of maximum sound pressure level in a given interval(L Atm5 )

Measurement time

1s,3s,5s,10s,1min,5min,10min,15min,30min,1h,8h,12h,24h
Manual(Max. 199h59m59s)

Sampling Time

20.8μs(L eq ,L max ,L min ),64ms(L N )

Data clear Function

Pause, and a function that deletes preceding 3 or 5 sec. dat
Memory start;Selectable Auto or Manual

Timer function

A marker can be set to start and stop the measurement at any specified moments.

Display

Liquid crystal and Backlight(128×64 points)
Display range:4digit display
Display cycle:display Period : 1s
Bar display : Display Period:0.1s
Warning :Over:+3dB from upper limited scale
        Under:-0.6dB from lower limited scale
Battery : 5 steps display
Date : year/month/day/hour:minute:second

Calibration signal

Electric calibration with internal oscillator (1kHz sine wave)

Output

AC Output:φ2.5Jack
Output:1Vrms(FS)
Output impedance:600Ω
Load impedance:more than 10kΩ
DC Outputφ2.5Jack
Output:2.5V(FS),0.25V/10dB
Output impedance:50Ω
Load impedance: more than 10kΩ

RMS detection circuit

True RMS detection circuit(digital computing type)

Processing

Digital

Pause

Normal temporary pause function, as well as the function of canceling the data before pausing the measurement, are available.

Data Storage Functions

Sound pressure level or Processed values stored in built-in Memory or Memory card
Manual Storage:Sound level, Calculation value, Memory time,Store the Sampling to Built-in memory or on Memory card,
Auto Storage:Sampling interval 100ms, 200ms, sound level,Leq etc. Processing Card :Storage of calculation results

I/O

Direct output to printer, control and output data to computer Digital output of real-time noise waveform with USB interface

Comparator Output

Comparator Function with threshold level

Battery

Four 1.5V Alkaline cells IEC type LR6, Optional AC adapter
Battery life(continuous time):Alkaline dry cell ; Approx.9hours
when Switch on a back light ;Approx.1/3
Consumption ampere:150mA (6V input) when processing function is OFF

Operating temperature

Temperature:-10-~50℃
Humidity:30%~90%RH(no condensation)

Size

85(W) x 328(H) x 48(D)

Weight

Less than APPROX 450g(including Batteries)