FEATURES

☼ Selectable application modules for measuring wide range of acoustic parameters

☼ Internal 1/1 and 1/3 octave filters

☼ 25 to 130dB measuring range

☼ 128 x 64 graphic LCD with back-lit

☼ Lower back ground noise

☼ Comply with IEC 61672-1: 2002 class 1

USES

☼ Precision acoustics measurements

☼ Frequency analysis in 1/1 and 1/3 octave filters with Modular A

☼ Environmental noise measurement and 24 hour monitoring with Modular B

☼ Reverberation time measurements with Modular A

☼ Airport Noise Monitoring and data collect with Modular C

 

PERFORMANCE SPECIFICATIONS

Standard: Complies with IEC 61672 class 1                                            

Meas. Range : 25 dB ~ 130 dB(A) (re. 20 μPa)

Freq. Range: 10 Hz ~ 20 kHz                                                         

Freq. Weighting: A, C, F (flat)

Time Weighting: F, S (Exp. average (RMS) , and Lin. Average                           

Level Linearity Range: 70 dB

Range: 10 ~ 80 dB, 20 ~ 90 dB, 30 ~ 100 dB, 40 ~ 110 dB , 50 ~ 120 dB , 60 ~ 130 dB

INPUT

Mic.: 1/2" Prepolarized Condenser Mic.                                               

Sensitivity: approach 50 mV/Pa

Freq. Range: 10 Hz ~ 20 kHz                                                       

Freq. Response: Free field

Polarized Voltage: 0 V                                                             

Ref. direction: Axial direction of microphone

Mic. Preamplifier

OUTPUT

Detector: Digital detector                                      

Indicator: 128 x 64 graphic LCD with back-lit

AC Output (full scale): 1.1V AC RMS                          

Output Impedance: 600 _ Connector: 3.5 mm jack plug

DC Output (full scale): 2.75 DC V, 0.25 V/dB                   

Output Impedance: 1000 _ Connector: 3.5 mm jack plug

http://www.set-ndt.ru/category_16.html

Digital I/O: RS-232C Interface                                

Connector: RJ45 plug

POWER SUPPLY

Batteries: 6 × LR6                                           

Operating Voltage: 6.5 ~ 9 V DC

Operating current: ≈80 mA                                  

Battery Life: ≈20 hours (continuous use)

External Power: 9 V DC 200 mA                              

Connector: 1.1 mm coaxial plug

ENVIRONMENT

Temperature: -10°C ~ 50°C                                   

Humidity: 25% ~ 90% (R.H)

Atmospheric Pressure: 650 hPa ~ 1080 hPa

PHYSICAL

Dimensions: NL270: 290 (H) x 90 (W) x 38 (D) mm; Carrying case: 120 (H) x 500 (W) x 300 (D) mm

Weight: NL270: ≈500 g (including batteries); Carrying case: 3.5 kg (including NL270 and all accessories)

Mounting Screw: UNC 1/4" for direct connection to tripod                                                                               

ACCESSORIES

Included: 1/2" Prepolarized Condenser Mic. , windscreen Ø80 mm x 1, RJ45-RS232 data cable x 1,

LR6 battery x 1, disc x 1, instrument manual x 1

Available: Noise Analyser, Sound Level Calibrator

5 m extension cable, 2 m mic. support rod, SLM tripod, carrying case

A/B/C three modulars mentioned may be selected and combined by users as follow:                                 

Model A - Spectrum Analysis and Reverberation Time Measurements

Meas. Parameters: Lp, Tr (reverberation time)

Measuring Range of Reverberation Time: 0.3 s ~ 10 s

Time Weighting: F, S ( Exp. average )

Store Capacity: 2000 groups of graphs/spectrums or reverberation time data

Internal Filter: 1/1 and 1/3 Octave band pass filters conform to IEC 61260 class 2

Center Frequency of 1/1 Octave Filter: 1/1 Octave:31.5 Hz, 63 Hz, 125 Hz, 250 Hz, 500 Hz, 1 kHz, 2 kHz,

4 kHz, 8 kHz, 16 kHz

Center Frequency of 1/3 Octave Filter: 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, 2.0 kHz, 2.5 kHz, 3.15 kHz, 4 kHz, 5 kHz, 6.3 kHz,

8 kHz, 10 kHz, 20 kHz

Display: Measured parameters and spectrum graphs and graph of change of instantaneous SPL

Model B - Statistical Analysis

Meas. Parameters: Lp, Leq, Lmax, Lmin, and L5, L10, L50, L90, L95,SD and Ld, Ln, Ldn

Meas. Time: Manual, 10 s, 1 min, 5 min, 10 min, 15 min, 20 min, 30 min, 1 h, 4 h, 8 h, 24 h (once per hour)

Time Weighting: F, S ( Exp. average ) and Linear average

Sampling Period: 0.1 s, 0.2 s, 0.5 s, 1 s, 2 s, 5 s, 10 s

24 Hours Automatic Monitoring: measuring once per hour

Intelligent Delete: Burst event may be deleted scientifically

Store Capacity: 2000 groups of data or 80 days of 24 h data

Display: Measured parameters and statistical and accumulated distribution graphs, 24 h distribution graphs

and graph of change of instantaneous SPL

Model C - Integrating and Airport Noise Measurements

Meas. Parameters: Lp, Leq, Lmax, Lmin, LAE, E, LEPN

Meas. Time: Manual, 10 s, 1 min, 5 min, 10 min, 15 min, 20 min, 30 min, 1 h, 4 h, 8 h, 24 h

Time Weighting: F, S ( Exp. average ) and Linear average

Sampling period: 0.1 s, 0.2 s, 0.5 s, 1 s, 2 s, 5 s, 10 s

Sampling Parameters: Lp, Leq. 1s

Store Capacity: 2000 groups of data or 480,000 time stamped results

Display: Measured parameters and graph of change of instantaneous SPL and calculated airport LEPN.