详情：
Four-channel sound & vibration Analyzer dedicated for engineering applications. Depending on an application, each channel can be independently configured, e.g. one tri-axial and one mono-axial vibration sensor or four microphones etc. The Class 1 Sound Level Meter enables the simultaneous four-channel real-time frequency analysis in 1/1 AND 1/3 octave bands. The meter can be used for building acoustic measurements e.g. simultaneous 4-channel RT 60 measurements. The RS 232 interface enables integration with the production line. The FFT Analyzer offers the detailed frequency analysis in a selectable frequency band. The BUILDING VIBRATION mode offers simultaneous VELOCITY and ACCELERATION measurements with the automatic indication of a DOMINANT FREQUENCY. OLED 2.4” color display (320 x 240 pixels) provides a super contrast visibility even in sunny weather. Robust aluminum housing gives the comfort of a secure grip to the user and protects the hardware against the electromagnetic interference.
SVAN 958A is a unique four-channel instrument offering 20 kHz-band sound & vibration analysis. It is a perfect choice for all applications that require simultaneous Class 1 noise measurements & triaxial vibration assessment. Each of four input channels can be independently configured for sound or vibration mode with different filters and RMS detector time constants giving users an enormous measurement flexibility. The real advantage of SVAN 958A is its capability to perform advanced analysis simultaneously with the level meter mode. In practice this allows the user to obtain broad-band results such as Leq, RMS, Lmax, Lmin, Lpeak together with four-channel analysis like FFT or octave band analysis. The list of analyzer functions includes FFT, 1/1 or 1/3 octave, cross spectra, sound intensity, RT 60 and more. All measurement results are stored in the non-volatile 32 MB internal memory and can be easily downloaded to a PC with SvanPC++ software. SVAN 958A with RS 232 interface (SV 55) can be offered with GPRS modem or LAN & WLAN connection module. Together with SvanNET or SvanPC++_RC remote communication software, these interfaces provide easy remote access to instrument settings & data over the Internet and local area networks. The instrument is powered by four AA standard or rechargeable batteries as well as by an external DC power source or USB interface. The robust case and light weight design enhance the exceptional features of the SVAN 958A. SVAN 958A Sound Level Meter Specification | Standards | Class 1: IEC 61672-1:2002 | | Number of Profiles | 3 | | Weighting Filters | A, B, C, Z, G | | Time constants | Slow, Fast, Impulse | | RMS Detector | Digital True RMS detector with Peak detection, resolution 0.1 dB | | Microphone (option) | MK 250, Class 1, 50 mV/Pa, prepolarised 1/2"e | | Preamplifier (option) | SV 12L IEPE type | | Linear Operating Range | 26 dBA RMS ÷ 140 dBA Peak (in accordance to IEC 61672) | | Total 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 | >100 dB | | Frequency Range | 3.5 Hz ÷ 20 kHz with MK250 microphone | | Meter Mode Results | SPL, Leq, SEL, Lden, LEPd, Overload time, Ltm3, Ltm5, LMax, LMin, LPeak,
Simultaneous measurement in three profiles with independent filters and detectors | | Statistics | Ln (L1-L99), complete histogram in meter mode, averaging: 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 30 s (auto-save function) logging of time history with step from 10 ms | | Wave Recording (option) | Time domain signal recording during measurement, trigger or continuous mode, 12 / 24 / 48 kHz sampling rate, 16 or 24 bit, wav format | | | Sound Analyser | | | 1/1 Octave Analysis (option) | Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 31.5 Hz to 16 kHz (audio band), selectable weighting filter, detector linear or Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 1 Hz to 16 kHz (full band), selectable weighting filter, detector linear | | 1/3 Octave Analysis (option) | Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 20 Hz to 20 kHz (audio band), selectable weighting filter, detector linear Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 0.8 Hz to 20 kHz (full band), selectable weighting filter, detector linear | | FFT Analysis (option) | 480 or 960 or 1920 lines in selectable band from 87.5 Hz to 22.4 kHz with selectable weighting filter, linear averaging, selectable window | | RT 60 (option) | Reverberation time analysis in 1/3 octaves, selectable method: decay or impulse | | RPM (option) | Rotation measurement option without Laser Tachometer (option), measurement of RPM, RPS, RMAX, RMIN | | Cross Spectrum (option) | Transfer Function and Coherence calculation | | Sound Intensity (option) | FFT - based sound intensity calculation | | | Vibration Level Meter | | Standards | ISO 8041:2005, ISO 10816-1 | | Number of Profiles | 1 or 2 in Ground Vibration mode | | Weighting Filters | Wd, Wk, Wc, Wj, Wm, Wb, Wg (ISO 2631), Wh (ISO 5349), HP1, HP3, HP10, Vel1, Vel3, Vel10,
VelMF, Dil1, Dil3, Dil10, KB (DIN 4150) | | RMS Detector | Digital True RMS detector with Peak detection, resolution 0.1 dB
Time constants: from 100 ms to 10 s | | Meter mode results | RMS, MAX, Peak, Peak-Peak, Overload time, MTVV, VDV, CRF, | | Accelerometer (option) | SV 84 triaxial high sensitivity accelerometer for ground or building vibration measurements (1 V/g)
SV 38 triaxial accelerometers for whole-body measurements (1 V/g MEMS type) | | Measurement Range | with SV 84: 0.0005 ms-2 RMS ÷ 50 ms-2 PEAK | | Frequency Range | 0.5 Hz ÷ 20 kHz; accelerometer dependent | | | Vibration Analyser | | Ground Vibration (included) | 2 vibration profiles for simultaneos measurement of PPV and VDV, simultaneous FFT analysis (if option active), simultaneous WAVE recording (if option active) according to DIN 4150-3 standard | | 1/1 Octave Analysis (option) | Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 1 Hz to 16 kHz (full band), HP weighting filter, detector linear | | 1/3 Octave Analysis (option) | Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 0.8 Hz to 20 kHz (full band), HP weighting filter, detector linear | | FFT Analysis (option) | 480 or 960 or 1920* lines in selectable band from 78 Hz to 20 kHz with HP weighting filter, averaging: linear , and selectable window *1920 lines not available for time history logging, minimum 50ms step for time history logging with 960 lines, minimum 20ms step for time history logging with 480 lines | | RPM (option) | Rotation measurement option without Laser Tachometer (option), measurement of RPM, RPS, RMAX, RMIN | | Cross Spectra (option) | Transfer Function and Coherence calculation | | | General information | | | Input | IEPE type (channels 1, 2, 3 - LEMO 4-pin & channel 4 - TNC connector) | | Dynamic Range | 100 dB, 4 x 20 bits A/D converters | | Frequency Range | 0.5 Hz ÷ 20 kHz, sampling rate 48 kHz | | Memory | 32 MB non-volatile flash type, external USB memory stick (not included) | | Display | Colour 320 x 240 pixels, OLED type | | Keyboard | 9 push buttons | | Communication Interfaces | USB 1.1 client | | USB 1.1 Host | | RS 232 (with SV 55 option) | | External I/O - AC output (1 V Peak) or Digital Input/Output (Trigger – Pulse) | | Power supply | Four AA batteries (alkaline) or four AA rechargeable NiMH batteries (not included) | | USB interface 500 mA HUB | | External power supply 6 V DC ÷ 24 V DC (1.5 W) | | SA 17A external battery pack (option) | | Environmental Conditions | Temperature from -10 oC to 50 oC | | Humidity up to 90% RH, non-condensed | | Dimensions | 140 mm x 82 x 42 mm | | Weight | Approx. 0.5 kg with batteries |
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