Home Products Noise & Vibration Measurement Systems Outdoor Noise Monitoring SV 277 Pro Outdoor Noise Monitoring station

SV 277 Pro Outdoor Noise Monitoring station

SV 277 PRO is an outdoor monitoring system based on SVAN 977 Class 1 sound level meter.

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The SVAN 977 can be easily removed from the case and used as a hand-held sound level meter. The monitoring station uses a 4G modem for the remote communication with Internet.

The IP 65-rated case contains a lead-acid battery which operating time can be easily extended by connecting an external battery or a solar panel. The intelligent charging unit enables use of a solar panel without expensive controllers or heavy batteries. The case is fitted with very robust, waterproof connectors (military standard) and is supplied with an IP 65 external power supply. The light-weight microphone protection kit can be easily installed on a mast with standard mounting threads.

All accessories fit conveniently into a second carrying case. The system provides broad-band results such as Leq, Max, Min and Peak with all standard weighting filters together with an incredible time-history logging feature with two adjustable logging steps. The broad-band results can be recorded in three acoustic profiles which enable measurements to be taken with 3 different filters (e.g. A, C, Z) as well as 3 different detector time constants (e.g. Fast, Slow, Impulse).

Technical Specifications of the SV 277 PRO

Standards	Class 1: IEC 61672-1:2013, Class 1: IEC 61260-1:2014
Weighting Filters	A, C, Z, B, LF, U, AU
Time Constants	Slow, Fast, Impulse
RMS Detector	Digital True RMS detector with Peak detection, resolution 0.1 dB
Microphone	Microtech Gefell MK 255, 50 mV/Pa, prepolarised 1/2” condenser microphone SA 277 outdoor protection kit (IP 65) with SC 277 extension cable
Preamplifier	SV 12L
Linear Operating Range	23 dBA RMS ÷ 140 dBA Peak (in accordance to IEC 61672)
Dynamic Measurement Range	16 dBA RMS ÷ 140 dBA Peak (typical from noise floor to the maximum level)
Internal Noise Level	Less than 16 dBA RMS
Dynamic Range	>110 dB
Frequency Range	3 Hz ÷ 20 kHz
Meter Mode Results	Elapsed time, Lxy, Leqx (LEQ), Lxpeak (PEAK), Lxymax (MAX), Lxymin (MIN), LR (ROLLING LEQ), Ovl (OVERLOAD), Lxye (SEL), LN (LEQ STATISTICS), Lden, LEPd, Ltm3, Ltm5
Measurement Profiles	Simultaneous measurement in three profiles with independent set of filters (x) and detectors (y)
Statistics	Ln (L1-L99), complete histogram in meter mode and 1/1 & 1/3 octave analysis
Data Logger	Time-history logging with two adjustable logging steps down to 2 milliseconds
Analyser	1/1 octave (included) or 1/3 octave real-time analysis (included), up to 40.0 kHz band meeting Class 1: IEC 61260-1 FFT analysis 1600 lines, up to 40.0 kHz band (option) RPM rotation speed measurement parallel to the vibration measurement (option) RT60 reverberation time measurement (option)
Audio Recording	Time domain signal recording to WAV signal, continuous or triggered (option) Sampling rate: 12/24/48 kHz with 24-bit resolution
Memory	MicroSD card 32 GB (removable & upgradeable up to 128 GB)
Communication Interfaces	USB 2.0 4G modem RS 232 for meteo module
Power Supply	Waterproof DC power supply 15 V , 60 WATT (acceptable voltage range 11 V ÷ 30 V) Internal battery 17 Ah / 12 V Secondary external battery 33 Ah / 12 V (option) Solar panel (option)
Operating Time on Battery	4 days with continuous modem transmission1 8 days with modem switched off1 Test Conditions: meter mode, display dimmed, 2 ms time-history logger, continuous event recording
Environmental Conditions	Temperature from -10 °C to 50 °C Humidity up to 95 % RH, non-condensed
Dimensions	305 x 270 x 194 mm (without cables)
Weight	Approximately 9 kg including battery