详情：
SVAN 971 is a CLASS 1 Sound Level Meter in accordance to IEC 61672-1. The meter is type approved in most of the countries around the globe. The meter is suitable for noise at work measurements in accordance to standards such as ISO 9612, OSHA, MSHA and ACGIH.It is the SMALLEST Class 1 instrument on the market. The size and weight are very convenient when making hand-held measurements.The TIME HISTORY LOGGING of results such as Leq, Max, Min and Peak with two simultaneous logging steps is saved on a 8 GB microSD card (upgradeable to 128 GB).The OLED DISPLAY is a full color and high contrast so it can be used in a sunlight or even at night. The OLED technology doesn’t use back-light giving SVAN 971 more battery operating time. The size of display is a perfect compromise between power savings and visibility.Once the calibration signal is detected, SVAN 971 starts the AUTO-CALIBRATION, saving the calibration data together with the measurement file, both before and after measurement.The built-in VIBRATION SENSOR informs meter about vibrations that interfere with noise measurements. In addition, the sensor detects the horizontal position of meter so the meter knows when to rotate the display.VOICE ANNOTATIONS (voice comments) before or after the measurements allow easy identification of data files.SVAN 971 has USB SOCKET which can be used for communication with PC software as well as for powering the instrument from an USB port.One of the biggest advantages of using SVAN 971 is its POWER EFFICIENCY. It can run up to 24 hours on one set of small AAA batteries.
The SVAN 971 is a Class 1 sound level meter in accordance to IEC 61672. The instrument is extremely small but offers unprecedented state of the art technology. For those who do not need to alter the measurement settings, the SVAN 971 has an extremely simple operational mode with only Start/Stop controls. This means that the SVAN 971 is the ideal choice for many applications including industrial noise measurement for health and safety, short term environmental noise monitoring and general noise measurements for acoustic consultants or technical engineers. The instrument is easily calibrated in the field using an acoustic calibrator as the calibration begins automatically when the microphone is inserted into the calibrator. The instrument also includes a built-in vibration sensor that provides information about vibrations that could influence the measurements. The SVAN 971 measures broad-band results with all necessary weighting filters as well as 1/1 octave or 1/3 octave band filters. It also offers time-history logging with two adjustable logging steps. The audio events recording allows to listen and recognize noise sources. The data are stored on a microSD card and can be easily downloaded to a PC using the Supervisor or SvanPC++ software. Standards | Class 1: IEC 61672-1:2013,Class 1: IEC 61260-1:2014 (Type Approved) | Weighting Filters | A, B, C, Z, LF | Time Constants | Slow, Fast, Impulse | RMS Detector | Digital True RMS detector with Peak detection, resolution 0.1 dB | Microphone | ACO SV 7052E, 35 mV/Pa, prepolarised 1/2” condenser microphone | Preamplifier | SV 18 detachable (60 UNS thread) | Linear Operating Range | 25 dBA RMS ÷ 140 dBA Peak (in accordance to IEC 61672) | 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 | Elapsed time, Lxy (SPL), Lxeq (LEQ), Lxpeak (PEAK), Lxymax (MAX), Lxymin (MIN),
where x - weighting filter A/ B/ C/ Z; y - time constant Fast/ Slow/ Impulse LR (ROLLING LEQ
OPTION), Ovl (OVERLOAD), Lxye (SEL), LN (LEQ STATISTICS), Lden, LEPd, Ltm3, Ltm5
Dosimeter Mode Results Lxy (SPL), Lxeq (LEQ), Lxpeak (PEAK), Lxymax (MAX),
Lxymin (MIN), DOSE, (optional) DOSE_8h, PrDOSE, LAV, Lxye (optional) (SEL), Lxye8 (SEL8),
PLxye, (PSEL), E, E_8h, LEPd, PTC (PEAK COUNTER), PTP (PEAK THRESHOLD %),
ULT (UPPER LIMIT TIME), TWA, PrTWA, Lc-a Exchange
Rate 2, 3, 4, 5, 6 | Measurement Profiles | Simultaneous measurement in three profiles with independent set of filters (x) and detectors (y) | Statistics1 | Ln (L1-L99), complete histogram in meter mode | Data Logger1 | Time-history logging of summary results, spectra with two adjustable logging steps
down to 100 ms | 1/1 Octave Analysis1(optional) | Real-time analysis meeting Class 1 requirements of IEC 61260, centre frequencies from
31.5 Hz to 16 kHz | 1/3 Octave Analysis1(optional) | Real-time analysis meeting Class 1 requirements of IEC 61260, centre frequencies from
20 Hz to 20 kHz | Audio Recording1(optional) | 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 | Ingress Protection Rating | IP 65 (excluding microphone) | Memory | MicroSD card 8 GB (removable & upgradeable up to 128 GB) | Display | Colour 96 x 96 pixels OLED type | Keyboard | 8 push buttons | Communication Interfaces | USB 2.0 client | | SV 76 RS 232 cable with external power supply connector (optional) | Power Supply | Four AAA alkaline or rechargeable NiMH batteries (not included) | | operation time 16 h ÷ 24 h2 | | USB interface 100 mA HUB | Environmental Conditions | Temperature from -10 °C to 50 °C (14 °F to 122 °F) | | 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 (Approx. 8.20 oz) | | 1function parallel to the meter mode2depending on configuration and environmental conditions |
|
