SVAN 945A

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SVAN 945A

Sound Analyser

 

OVERVIEW

The SVAN 945A is all digital, Type 1 sound level meter (SLM) and analyser. It is intended to general acoustic measurements, environmental noise monitoring, occupational health and safety monitoring.

Using computational power of its digital signal processor the SVAN 945A can perform real time 1/1 & 1/3 octave analysis including statistical calculations. All  weighting filters, required by standards (A, C, Lin (Z) and G), are available with this instrument.

Three acoustic profiles can be measured in parallel with independently defined filters and RMS detectors time constants (concurrent Impulse, Fast and Slow measurements are possible). Time history for all profiles could be recorded in the memory buffer. The sound loudness and tonality can also be measured (as an option). The high resolution FFT and pure tone detection options further extend the capabilities of this unit.

Fast USB 1.1 interface (12MHz) creates real time link for the application of the SVAN 945A as a PC "front-end".

Measurement results can be stored in large (8, 16 or 32 MB), non-volatile memory and easy downloaded to any PC using USB 1.1 or RS 232 interface and SvanPC software.

Thanks to built in rechargeable battery and robust, lightweight construction, the SVAN 945A can be used in hard environmental conditions over the work day.

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FEATURES

  • Noise measurements (SPL, Leq, SEL, Lden, Statistics. TaktMax) with Type 1 accuracy
  • Parallel Impulse, Fast and Slow detectors for the measurements with A, C Lin or G filters
  • One measurement range 24 dBA - 140dBA in the SLM mode
  • 1/1 and 1/3 octave real time analysis parallel to the SLM operation
  • FFT Calculation (1920 lines in real time up to 20 kHz)
  • Acoustic loudness measurement (optional)
  • Tonality function measurement with two 800-line FFT spectra parallel to the SLM operation (optional)
  • Reverberation time measurements (optional)
  • Internal buffer for logging more then two week of the 1 sec RMS/Spl/Peak results (8, 16, 32 MB non-volatile memory)
  • USB 1.1 and RS 232 interfaces
  • Built in temperature and static pressure measurements
  • Built in rechargeable battery (operational time >8 h); Sv 45 remote control/external battery unit available
  • Handheld, robust case
  • Light weight (only ca 600 grams

For a PDF version of this document please click here.

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TECHNICAL SPECIFICATIONS
FUNCTIONS  

   SOUND LEVEL METER

 Type 1: IEC 651, IEC 804 and IEC 61672-1
  Leq, Lmax, Lmin , LPeak, SPL, SEL, Lden, Ltm3,  Ltm5, statistics-Ln (l1-L99)
  Time history all for A, C, Lin (Z) G filters in parallel
  Loudness (optional), Tonality (optional)

   SOUND ANALYSER

 Real time 1/1 & 1/3 octave analysis with statistics (spectra recording speed down to 2 ms) (optional).
  1920-line FFT spectra calculated in the real time for 20 kHz and sub-bands (optional)
  Analysis in the bark bands (with loudness function - optional)
PREAMPLIFIER INPUT Sv 11 with the LEMO 5 pin compatible connector
MEASUREMENT RANGE 24 dBA - 140 dBA
DYNAMIC RANGE 120 dB (in the SLM mode). 100 dB (in the Analyser mode)
  > 90 dB (in the Analyser mode)
  A/D conversion: 2 x 20 bits
FREQUENCY RANGE 1 Hz - 20 kHz
  Sampling rate: 48 kHz
WEIGHTING FILTERS A, C and Lin (Z) (Type 1: IEC 651, IEC 804 and IEC 61672-1) & G
1/1 OCTAVE FILTERS 15 filters with centre frequencies 1 Hz to 16 kHz (Type 1- IEC 1260)
1/3 OCTAVE FILTERS 45 filters with centre frequencies 0.8 Hz to 20 kHz (optional)
RMS DETECTOR Digital True RMS with Peak detection

   Resolution

 0.1 dB

   Integration time

 Programmable up to 24 h

   Time constants

 Slow, Fast, Impulse (in parallel)
MICROPHONE GRAS 40AN 50 mV/Pa. 1/2" Condenser Microphone
DISPLAY LCD 97x32 pixels plus icons with backlighting
MEMORY 8, 16, 32 MB non-volatile (flash type)
ANALOGUE OUTPUT AC 0.5 VRMS
INTERFACES USB 1.1 and RS 232
POWER SUPPLY  

   Built in rechargeable battery

 4.8 V / 1.5 Ah

   External power supply

 9 - 15 VDC / 700 mA

   Internal battery operating time

 > 8 h
ENVIRONMENTAL CONDITIONS  

   Temperature

 -10 ?/sup>C to 50 ?/sup>C

   Humidity

 up to 90% RH, non condensed
DIMENSIONS 298 x 84 x 44 mm (without microphone and preamplifier)
WEIGHT approx. 0.6 kg (with battery, microphone and preamplifier)

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PICTURE

SVAN 945A Analyser

 

 

 

 Screen Shots

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