Svan 977A

Sound & Vibration Analyser

SVAN 977 Class 1 Sound & Vibration Level Meter and analyser is designed to meet the needs of both environmental monitoring and occupational health and safety monitoring specialists. Its exceptional hardware design also enables the measurement of ultra sound frequencies in the 40 kHz band.

The SVAN 977 provides broadband results with all the standard weighting filters and also offers an incredible time history logging capability providing broadband results and spectra with adjustable double (long and short) logging steps.

Audio recording can be performed simultaneously with time history logging as either a separate wave file or as audio events inside time history files. This solution enables noise source recognition and data post-processing. Manual and automatic triggering of audio recording is also available.

Measurement results are recorded in three acoustic or vibration profiles enabling measurements to be performed with 3 different filters (e.g. A, C, Z) and 3 different detector time constants (e.g. Fast, Slow, Impulse).
Measurement data is stored on a µSD card and can be easily downloaded to a PC using SvanPC++ software over either USB or RS 232 interfaces.

The powerful DSP (digital signal processor) used in the SVAN 977 instrument can simultaneously operate in meter mode and perform real-time 1/1 or 1/3 octave analysis including statistical calculations. Additional functions like real-time FFT analysis and Rotation Speed Measurement are also available.

  • Class 1 IEC 61672:2002 sound level measurements
  • Ultra sound measurements in 40 kHz band
  • General vibration measurements (acceleration, velocity and displacement)
  • Three parallel independent profiles
  • 1/1 octave real-time analysis
  • 1/3 octave real-time analysis (optional)
  • FFT analysis (optional)
  • Time-domain signal recording & audio events recording (optional)
  • Reverberation time measurements (optional)
  • Advanced Data Logger including spectral analysis
  • MicroSD card providing almost unlimited logging capacity
  • Bluetooth™ interface (optional)
  • All weather microphone protection kit designed for community and airport noise monitoring
  • OLED color display with super brightness and contrast
  • Hand held, light weight and robust case
  • Easy to use
Standards Class 1: IEC 61672-1:2002
Number of Profiles 3
Weighting Filters A, B, C, Z
Time constants Slow, Fast, Impulse
RMS Detector Digital True RMS detector with Peak detection, resolution 0.1 dB
Microphone ACO 7052E, 35 mV/Pa, prepolarised 1/2” condenser microphone
Calibration Automatic calibration start at 114dB/1kHz
Preamplifier SV 12L IEPE type
Linear Operating Range 25 dBA RMS ÷ 140 dBA Peak (in accordance to IEC 61672)
Total Dynamic Measurement Range15 dBA RMS ÷ 140 dBA Peak (typical from noise floor to the maximum level)
Internal Noise Level less than 15 dBA RMS
Dynamic Range >110 dB
Frequency Range 10 Hz ÷ 20 kHz with ACO 7052E microphone or 10 Hz ÷ 40 kHz with optional microphone, e.g MK 202E
Meter Mode Results SPL, Leq, SEL, Lden, Ltm3, Ltm5, LMax, LMin, LPeak, “sliding Leq” up to 60 minutes Simultaneous measurement in three profiles with independent set of filters and detectors
Statistics Ln (L1-L99), complete histogram in meter mode, linear of with detector (exponential) Ln (L1-L99) statistics in 1/1 or 1/3 octaves (if option is active)
Data Logger logging of summary results with step from 1s logging of time history with step from 2ms
Audio Recording (option) Audio events recording during measurement, trigger or continuous mode, 12 / 24 / 48 kHz sampling rate, 16 or 24 bit, wav format
Wave Recording (option) Time domain signal recording during measurement 12 / 24 / 48 kHz sampling rate, 16 or 24 bit, wav format