The SVAN 977A is a Class 1 Sound and Vibration meter designed for occupational and environmental measurement applications. The SVAN 977A is a successor of SVAN 977 offering bigger memory 8 GB and the Bluetooth® interface as a software option that can be enabled at any time. The meter 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.
One unique feature of the SVAN 977A is ultrasound measurement bａnd up to 40 kHz. The ultrasound bａnd is normally considered as the frequency range above 20 kHz. Ultrasound is used in a number of industrial processes such as cleaning, drilling or welding as well as hospitals for medical procedures.
The built-in Bluetooth® interface together with smart-phone application, SvanMobile, extends measurement capabilities with all the features offered by smartphones including text/voice comments, photo, video, GPS position etc.
With the option of time signal recording SVAN 977A can record the raw signal samples with defined frequency up to 48 kHz. Analysis of the raw signal is used whenever frequency analysis is not sufficient. Post-processing of high quality wave files (48 kHz, 24 bit) such as calculation of tonality is available in SvanPC++ program. Time signal is recorded in a wave format which means that it can be played back in the PC software and used for noise source recognition (audio recording).
The SVAN 977A kit consists of SVAN 977A Class 1 sound & vibration level meter with a detachable preamplifier SV 12L and high quality omni-directional SV 7052E microphone, compliant to IEC61094-4. The list of accessories includes: SA 143 carrying case, SA 22 windscreen, 8 GB microSD card, four AA batteries, USB cable, and CD with user manual. Each SVAN 977A has its factory calibration certificate and 36 months warranty card.
With an optional microphone and 1/3 octave or FFT analysis SVAN 977A provides analysis of the ultrasounds up to 40 kHz. The ultrasound bａnd is normally considered as the frequency range above 20 kHz. Limits of permissible ultrasound levels are usually expressed in terms of Leq and Max values specified in 1/3 octave bands for 20 kHz, 25 kHz, 31.5 kHz and 40 kHz.
| Standards | Class 1: IEC 61672-1:2013 |
| 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 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 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 |
Sound Analyser | |
| 1/1 Octave Analysis (included) | Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 31.5 Hz to 16 kHz (audio band) with selectable weighting filter and detector or Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 1 Hz to 31.5 kHz (ultrasound band) with linear detector |
| 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) with selectable weighting filter and detector or Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 0.8 Hz to 40 kHz (ultrasound band) with linear detector |
| FFT Analysis (option) | 400 or 800 or 1600 lines in selectable bａnd from 78 Hz to 20 kHz with selectable weighting filter, selectable averaging: linear or exponential, and selectable window or 400 or 800 or 1600 lines in ultrasound bａnd from 25 Hz to 40 kHz with selectable averaging: linear or exponential, and selectable window |
| RT 60 (option) | Reverberation time analysis in 1/1 octaves, selectable method: decay or impulse, or Reverberation time analysis in 1/3 octaves, selectable method: decay or impulse |
Vibration Level Meter and Analyser | |
| Standards | ISO 10816-1 |
| Number of Profiles | 3 |
| Weighting Filters | Acceleration: HP1, HP3, HP10; Velocity: Vel1, Vel3, Vel10, Displacement: Dil1, Dil3, Dil10 Machine filter: VelMF (ISO 10816-1) |
| RMS Detector | Digital True RMS detector with Peak detection, resolution 0.1 dB Time constants: from 100 ms to 10 s |
| Accelerometer (option) | SV 80 IEPE, single axis, sensitivity 10 mV/(ms-2) ~ 100 mV/g |
| Measurement Range | 0.01 ms-2 RMS ÷ 500 ms-2 Peak (with SV 80) |
| Frequency Range | 1 Hz ÷ 5 kHz (with SV 80 and HP or HP1 filter) |
Vibration Analyser | |
| 1/1 Octave Analysis (included) | Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 1 Hz to 16 kHz (full band) with selectable weighting filter and detector or Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 1 Hz to 31.5 kHz (ultra band) with linear detector |
| 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) with selectable weighting filter and detector or Real-time analysis meeting Class 1 requirements of IEC 61260, center frequencies from 0.8 Hz to 40 kHz (ultra band) with linear detector |
| FFT Analysis (option) | 400 or 800 or 1600 lines in selectable bａnd from 78 Hz to 40 kHz with HP weighting filter, selectable averaging: linear or exponential, and selectable window |
| RPM (option) | Rotation measurement option without Laser Tachometer (option), measurement of RPM, RPS, RMAX, RMIN |
General information | |
| Input | TNC (IEPE type) |
| Memory | MicroSD card 8 GB (removable & upgradeable) |
| Display | Colour 320 x 240 pixels, OLED type |
| Keyboard | 9 push buttons |
| Communication Interfaces | USB 2.0 client |
| Bluetooth® (option) | |
| RS 232 (with SV 55 option) | |
| External I/O - AC output (1 V Peak) or Digital Input/Output (Trigger – Pulse) | |
| Power supply | Four AA alkaline or rechargeable NiMH batteries (not included) |
| USB interface 500 mA HUB | |
| External power supply 6 V/500 mA DC ÷ 15 V/250 mA DC | |
| SA 17A external battery pack (option) | |
| Environmental Conditions | Temperature from -10 oC to 50 oC |
| Humidity up to 90% RH, non-condensed | |
| Dimensions | 340 mm x 79 x 39 mm (including microphone and preamplifier) |
| Weight | Approx. 0.6 kg with batteries |
