Máy đo độ ồn và phân tích dải tần Norsonic Nor131/Nor132

Máy đo độ ồn và phân tích dải tần Nor132,131

Máy đo độ ồn và phân tích dải tần Norsonic Nor131/Nor132

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Model

Bảo hành

Norsonic

Nor131/132

12 tháng

Để có giá tốt nhất và nhanh nhất, vui lòng liên hệ

(028) 3977 8269 – (028) 3601 6797

Email: sales@lidinco.com – lidinco@gmail.com

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Mô tả

Giới thiệu máy đo độ ồn Nor131/Nor132

Máy phân tích âm thanh gồm hai sản phẩm Nor131 và Nor132. được thiết kế và sản xuất theo tiêu chuẩn đo mức âm thanh mới nhất.

Nor131 thiết kế theo yêu cầu loại 1 với độ chính xác tuyệt đối, Nor132 được thiết kế phù hợp yêu cầu loại 2 với độ chính xác tương đối. Cả hai máy cung cấp các tính năng tương tự nhau và có một điểm khác biệt là phiên bản Nor131 amli có thể tháo rời.

Ứng dụng

– Phân tích tiếng ồn nơi làm việc
– Quy định về bảo vệ thính giác
– Điều tra tiếng ồn môi trường
– Kiểm tra tiếng ồn sản phẩm
– Đồng hồ đo mức âm thanh đa năng
– Đo lường âm vang
– Ngôn ngữ máy dễ sử dụng

Tính năng, đặc điểm

– Thao tác cực kỳ đơn giản
– Kết hợp LAeq và LCpeak
– Tuân theo tiêu chuẩn IEC và ANSI
– Thời gian thực 1/1 octave và 1/3 octave
– Phân tích thống kê
– Tính toán chỉ số truyền giọng nói (STIPA)
– Tính toán thời gian đảo ngược
– Màn hình hiển thị lớn
– Bộ nhớ trong lớn
– Hỗ trợ USB
– Hỗ trợ đa ngôn ngữ.

The Nor131 and Nor132 sound level meters may be extended with a selection of optional features that may be ordered and installed at any time.

Option 1 : Frequency analysis - 1/1 octave filters

The Nor130 series of SLM’s may be extended with digital real-time 1/1-octave filters. This feature is available through the installation of option 1, and covers 12 frequency bands in the range from 8Hz to 16kHz.

Within each band, the instrument will measure the SPL, Leq, LMax, LMin and LE functions. Additionally, if the Option 2 Statistical analysis is installed, 8 different LN-percentiles are calculated within each 1/1-octave band.

A-preweighting feature available on display results.
All filters fulfill the IEC 61260 class 1 digital IIR base 10 requirements.
120 dB “one-range” even in the filter bands.
Results are displayed both graphically and numerically

The 1/1-octave spectrum may be viewed with a A-preweighting  feature

The 1/1-octave table is scrolled up and down for all measured functions

Option 2: Statistical Analysis

Calculate 7 fixed LN values (L1%, L5%, L10%, L50%, L90%, L95% and L99%).
Parallel calculation of 1 editable LN value selectable within the range 0.1 – 99.9 %.
Statistical calculations based on 0.2 dB class widths covering the entire 130 dB range.
Parallel statistical calculation on both A- and C-/Z-weighted networks.
If real-time filters are installed (option 1 or 3), statistical calculations are available for the individual filter bands as well.
Option 4 adds statistical distribution to the Nor31/Nor132 functionality. There are eight percentiles shown, out of which one is user selectable. The class width is 0.2 dB over the entire 130 dB range.

The statistical distribution calculations employs the F time constant and applies to the spectral weighting networks (A and C or Z) as well as all the individual 1/1 and 1/3-octave filter bands (if applicable). The back-erase feature, which deletes up to the ten most recent seconds of acquired global data prior to a pause upon resuming, updates the statistics buffers as well to maintain consistency.

The LN percentage table contains 7 fixed and one user-defined percentile

Option 3 : Level vs Time

Simultaneous measurement of Global results and Profile results based on a level versus time values at preset intervals
Selection of preset intervals within the 1 second to 199 hours interval range
Automatic level versus time storage of LAeq, LAmax and LCpeak (or LZpeak)
Level versus time measurement continues during a paused Global measurement
Markers identify any pause, stop or continue of the measurement
To view or report the result simply transer the measurement result to PC using NorXfer and NorReview. Measurement results may also be automatically converted to Excel using NorXfer

Option 4: 1/3-octave real-time filters

The Nor130 series of SLMs may be extended with digital real-time 1/3-octave filters. This feature is available through the installation of option 4.

Within each band, the instrument will measure the SPL, Leq, LMax, LMin and LE functions. Additionally, if the Option 2 Statistical analysis is installed, 8 different LN-percentiles are calculated within each 1/3-octave band.

Parallel 1/3-octave real-time filters covering the 6.3 – 20000 Hz frequency range.
All filters fulfill the IEC 61260 class 1 digital IIR base 10 requirements.
A-preweighting feature available on display results.
120 dB “one-range” even in the filter bands.
Results are displayed both graphically and numerically.

1/3-octave spectrum   A-weighed spectrum

Option 5: Reverberation time measurement mode

Reverberation time measurement mode is now available on the sound level meter Nor131 and Nor132.

Reverberation time based on impulse excitation
Calculates both T20 and T30
Covers the 63 – 8000 Hz frequency bands for the 1/1-octave filters
Covers the 50 – 10000 Hz frequency bands for the 1/3-octave filter
Option 5 requires that option 1: 1/1-octave bands is installed!

Reverberation time measurement mode

Option 6: STIPA (Speech Transmission Index) measurement mode

Calculates the STIPA speech transmission index
Fulfils the requirements of the latest IEC 60268-16 (2011-6) Standard for STIPA
Includes signal (.vaw) for use through separate public address
Loudspeaker system or portable CD-player can be used for playback of signal
Background noise correction
It is now possible to use the Nor131 and Nor132 meters for analysing the Speech Transmission quality in public areas using the STIPA method. The method can be used to compare the speech transmission quality at various positions and under various conditions within the same listening space. The calculation follows the latest revision of the standard (2011-6).

A measurement in one listening position takes about 13 sec. Unlike many other STIPA measurement systems, the implementation with the Nor131/132 can also correct the results for the background noise. In addition all calculated indexes are displayed, not only the single STIPA value. This feature is valuable for engineers optimizing the room acoustics in public spaces or other areas where the speech quality is important.

Option 6 requires that option 1: 1/1-octave bands is installed!

STIPA (Speech Transmission Index) measurement mode

 

Brochure

The Nor130 series of SLM fulfil the following Sound Level Meter and 1/1&1/3 octave filter standards: IEC 60651, IEC 60804, IEC 61672, IEC 61260, ANSI S1.4, ANSI S1.11, ANSI S1.43, DIN45657. The Nor131 instrument meets the Class1 requirements while the Nor132 instrument the Class 2 requirements.

English, French and German language support.

Measured Parameters

Simultaneous measurement of SPL, Leq, LMax, LMin, LE and LPeak (plus the Tmax5 for Germany only).
Time weighting functions: Fast, Slow and Impulse.

Spectral weighting functions: Simultaneously measurement of A and C or Z-weighting. Additionally the 1/1 octave real time filters covering all bands from 8 Hz to 16K Hz (option 1) or 1/3-octave covering all bands from 6,3Hz to 20kHz (option 4).

Statistical calculations: 7 fixed percentiles L1%, L5%, L10%, L50%, L90%, L95%, and L99% plus one user defined value (f.ex. L0.1%). The statistical calculation is performed in real time within each frequency band if the filter option 1 is installed.

Measurement range

One range covering 120dB without any range adjustments.
Self noise measured with microphone: 17dBA (25dBA for Nor132)
Maximum RMS level: 137dBA
Maximum Peak level: 140dB PeakC
Levels up to 174dB can be measured by use of a suitable 1/4” microphone.

Battery / power consumption

Battery: 4 cells, IEC LR6, AA-sized, Alkaline batteries are recommended (e.g. Duracell Ultra M3). AA-sized NiCd or NiMH rechargeable batteries may be used, but must be charged outside the instrument. Battery voltage and time on battery since last change of bat-teries are indicated.
Typical battery life time (Duracell Ultra M3): 8 – 12 hours.

External dc: 11 – 16 volt. Power consumption approximately 1.2 watt dependent on selected modes of operation. External DC source should have source-impedance less than 1 ohm and be able to supply at least 300 mA. The mains adaptor Nor340 is recommended for use with the instrument.

If the external supply falls below 9 V, the instrument will use the internal batteries if available. If the instrument has switched off due to loss of power or insufficient supply voltage, the instrument will automatically switch on after reapplying the external DC supply.

Display

The display is a monochrome, trans-reflective LCD graphical display with 160×240 pixels (W×H) with automatic temperature compensation for contrast and viewing angle. Pressing the light key illuminates the display. The light switches off automatically 2 minutes after the last operation of any key.
The bar graph display covers 80 dB, which may be scrolled in 10 dB steps to cover the total range.

Data storage / Data transfer

Measured data is stored in the internal memory of the sound level meter. The memory is of the “flash” type retaining the information without battery supply. Approximately 5 Mbyte is available for the data storage. This corresponds 10 000 measurement for sound level meters without octave analysis and up to 2 500 for sound level meters with octave analysis.

Data transfer via USB 2.0 interface.

Analogue input

Input connector: TNC connector for Norsonic microphone systems.
Preamplifier: Nor1207 IEPE.
Polarisation voltage: 0 V (pre-polarized)
Supply current: 3mA
Supply voltage: 24V
Input impedance: > 100 kohm, <650 pF
Measurement range: 0.3 mV to 7 V (RMS) in one range corresponding to –10 dB to 137 dB with a microphone sensitivity of 50 mV/Pa. The maximum peak value ±10 V corresponds to 140 dB.
Microphone: Nor1228

Analogue outputs

The analogue output is a reproduction of the digitized input signal from the microphone (or input connector) obtained by a digital to analogue converter.
Output voltage: Full scale on the display corresponds to 100 mV.
Output impedance: The loading impedance shall be 16 ohm or greater. The output is short-circuit proof to GND.
Gain accuracy at 1 kHz: ±0.2 dB.
Frequency response re. 1 kHz: ±0.5 dB for 20 Hz < f < 16 kHz.

Environmental conditions

Reference conditions: The reference conditions for the instrument are as specified by IEC 61672-1 .
Temperature: 23°C
Humidity: 50% RH
Atmospheric pressure: 101.325 kPa

Environmental conditions for operation

Temperature: –10°C to +50°C
Humidity: 5% to 90% RH, dewpoint less than 40°C Atmospheric pressure: 85 kPa to 108 kPa

Environmental conditions for storage
Temperature: –30°C to +60°C
Humidity: 5% to 90% RH, dewpoint less than 40°C Atmospheric pressure: 50 kPa to 108 kPa

Dimensions

Depth: 29 mm
Width: 74 mm
Length, excl. microphone/preamplifier: 215 mm,
Length, incl. microphone/preamplifier: 305 mm
Weight incl. batteries: 380 g