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北京子午銳德科技有限公司
Svantek SV 271 LITE Noise Monitoring Station
SV 271 LITE is an outdoor monitoring system based on type approved SVAN 971 Class 1 sound level meter. The IP 65-rated case contains a lead-acid battery which operating life 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). The SVAN 971 can be easily removed from the case and used as hand-held sound level meter.
Standards | Class 1: IEC 61672-1:2013 |
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 @ 114dB/1kHz |
Preamplifier | SV 18 detachable |
Linear Operating Range | 25 dBA RMS ÷ 140 dBA Peak (in accordance to IEC 61672) |
Total Dynamic Measurement Range | 15 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 |
Meter Mode Results | SPL, Leq, SEL, Lden, Ltm3, Ltm5, LMax, LMin, LPeak, “running 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 |
Data Logger | Time-history logging of summary results, spectra with adjustable double logging steps down to 100 ms |
Audio Recording (option) | Audio events recording, trigger and continuous mode, 12 kHz sampling rate, wav format |
Voice Comments | Audio records on demand, created before or after measurement, added to measurement file |
Noise Dosemeter | |
Dosimeter Mode Results (option) | SPL, Leq, SEL, LPeak, Dose, D-8h, Lav, SEL8, PSEL, E, E-8h, TWA, ’Peak Counter’ and more Exchange Rate 2, 3, 4, 5, 6 |
Sound Analyser | |
1/1 Octave Analysis (option) | Real-time analysis meeting Type 1 requirements of IEC 61260, center frequencies from 31.5 Hz to 16 kHz available simultaneously with three profiles for broadband measurements (SLM), time-history logging and audio recording |
1/3 Octave Analysis (option) | Real-time analysis meeting Type 1 requirements of IEC 61260, center frequencies from 20 Hz to 20 kHz available simultaneously with three profiles for broadband measurements (SLM), time-history logging and audio recording |
General information | |
Ingress Protection Rating | IP 65 (excluding microphone) |
Input | Preamplifier (60 UNS thread) |
Memory | MicroSD card 8 GB (removable & upgradeable) |
Display | Colour 96 x 96 pixels OLED type |
Keyboard | 8 push buttons |
Communication Interfaces | USB 2.0 client |
SV 75 RS 232 cable (optional) or SV 76 RS 232 cable with external power supply connector (option) | |
Power supply | Four AAA alkaline or rechargeable NiMH batteries (not included) |
USB interface 100 mA HUB | |
Environmental Conditions | Temperature from -10 oC to 50 oC |
Humidity up to 95% RH, non-condensed | |
Physical Characteristics | Dimensions: 232,5 mm x 56 x 20 mm (including microphone and preamplifier) Weight: Approx. 225 grams with batteries |
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