SV 977D
SV 977D Class 1 Sound & Vibration Level Meter
The SV 977D is a Class 1 Sound and Vibration meter designed for building acoustics, and occupational and environmental noise measurements.
The meter is equipped with a 1/2” MK 255 microphone offering a wide frequency range from 3 Hz and, excellent long-term stability of sensitivity.
The SV 977D has a built-in Bluetooth® interface for wireless connection with smartphone applications such as Building Acoustics Assistant which extends the measurement capabilities dedicated for building acoustics.
The SV 977D can also be used as a vibration level meter by simply connecting the appropriate cable and a vibration sensor.
Key Features
Technical Specifications
Wide Application
BA Assistant
Free Tools
Software
Key Features
| Class 1 sound & vibration level meter | The SV 977D Class 1 Sound & Vibration Level Meter and Analyser is designed to meet the needs of both environmental monitoring and occupational health and safety monitoring specialists |
| Real-time frequency analysis | Depending on the application, frequency analysis can be done in the 1/1 octave, 1/3 octave spectra or optionally in FFT. |
| WAV recording | Optional time domain signal recording to WAV format with a defined frequency up to 48 kHz. Postprocessing of high quality wave files (48 kHz, 24 bit) is available in SvanPC++ program. |
| Reverberation time measurements | The RT 60 functionality in the instrument provides fast verification of results on site. Calculation of RT 60 values is based on 1/1 or 1/3 octave logging results. The smartphone application helps the user in calculating the insulation in accordance with ISO 16283. |
| STIPA in accordance with IEC 60268 | The meter is supported by a dedicated mobile application to help perform STIPA measurements and calculations. The STIPA signal is usually reproduced by loudspeakers available as part of the public information system under study, and in some cases dedicated loudspeakers are used. |
| Ultrasounds to 40 kHz | With an optional microphone and 1/3 octave or FFT analysis, the SV 977D provides analysis of ultrasounds up to 40 kHz. |
| Vibration level meter | If you disconnect the microphone preamplifier, you can use the instrument to take vibration measurements by simply connecting the appropriate cable and a vibration sensor. |
Technical Specifications
| Sound Level Meter & Analyser | |
|---|---|
| Standards | Class 1: IEC 61672-1:2013, Class 1: IEC 61260-1:2014 |
| Weighting Filters | A, B, C, Z, 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 |
| Preamplifier | SV 12L detachable (TNC) |
| Linear Operating Range | 23 dBA RMS ÷ 140 dBA Peak (in accordance to IEC 61672-1:2013) |
| Dynamic 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 with Microtech Gefell MK 255 |
| Sound Level Meter 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 |
| Linear Operating Range | 23 dBA RMS ÷ 140 dBA Peak (in accordance to IEC 61672-1:2013) |
| Measurement Profiles | Ln (L1-L99), complete histogram in meter mode and 1/1 or 1/3 octave analysis |
| Statistics | Ln (L1-L99), complete histogram in meter mode and 1/1 or 1/3 octave analysis |
| Data Logger | Time-history logging of summary results, spectra with two adjustable logging steps down to 2 ms |
| Analyser | 1/1 or 1/3 octave real-time analysis, up to 40.0 kHz band meeting Class 1 requirements of IEC 61260-1 FFT analysis 1600 lines, up to 40.0 kHz band (optional) RPM rotation speed measurement parallel to the vibration measurement (optional) RT60 reverberation time measurement (optional) STIPA speech transmition index measurement and calculations (optional) |
| Audio Recording | Audio recording on trigger or continuous mode, 12 / 24 / 48 kHz sampling rate, wav format (optional) |
| Vibration Level Meter & Analyser | |
|---|---|
| Standards | ISO 20816-1 |
| Meter Mode | RMS, Max, Peak, Peak-Peak Simultaneous measurement in three profiles with independent filter sets and detectors |
| Filters | HP1, HP3, HP10, Vel1, Vel3, Vel10, VelMF, Dil1, Dil3, Dil10, Wh |
| Accelerometer | SV 80 (100 mV/g) or any IEPE accelerometer (optional) |
| Analyser | 1/1 or 1/3 octave real-time analysis, up to 40.0 kHz band meeting Class 1: IEC 61260-1, FFT analysis 1600 lines, up to 40.0 kHz band (optional), RPM rotation speed measurement parallel to the vibration measurement (optional) |
| Data Logger | Time-history logging of summary results, spectra with two adjustable logging steps |
| Time-domain Signal Recording | Continuous or triggered time-domain signal recording to WAV format (optional) |
| General information | |||||||||
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| Input | IEPE with TNC connector | ||||||||
| Memory | MicroSD card 32 GB (removable & upgradeable up to 128 GB) | ||||||||
| Display | Blanview TFT-LCD 2.4” colour display (320 x 240 pixels) | ||||||||
| Communication Interfaces | USB-C, Bluetooth® 5.2, RS 232 (with optional SP 76), External I/O – AC output (1 V Peak) or Digital Input/Output (Trigger – Pulse) | ||||||||
| Power Supply |
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| Environmental Conditions |
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| Dimensions | 343 x 79 x 39 mm (with microphone and preamplifier) | ||||||||
| Weight | Approx. 0.6 kg with batteries | ||||||||
| 1 typical operational time is dependent on the instrument operation mode, and battery type | |||||||||
| The policy of our company is to continually innovate and develop our products. Therefore, we reserve the right to change the specifications without prior notice. | |||||||||
Wide Application
| Large measurement range for various applications | The new SV 977D is the top-class professional class 1 sound level meter designed for engineering applications, building acoustics and ultrasound measurements up to 40 kHz. |
BA Assistant
| Building Acoustics mobile application | The smartphone application helps the user in calculating the insulation in accordance with ISO 16283. Sound insulation results are presented on the display and in the form of a report which is compliant with the ISO requirements. |
Free Tools
| 1/1 and 1/3 octave on board | Frequency analysis of signals in the 1/1 or 1/3 octave bands makes it possible to determine the influence of high or low frequencies on the overall values. Both functions are available in sound and vibration mode at no extra cost. |
Software
| SvanPC++ | All measurement files are saved in the internal memory of the instrument, but after this more complex analyses can be carried out using the SvanPC++ Building Acoustics software module. The software includes a very powerful calculator that automatically averages the 1/n octave spectra time history and performs calculation of reverberation time. |
| BA Assistant | The Building Acoustics Assistant application works on Android platforms, and is easy to install and intuitive to operate. The user interface shows a preview of the results in the form of time-history plots as well as numerical values. The smartphone application helps the user in calculating the insulation in accordance with ISO 16283. Sound insulation results are presented on the display and in the form of a report which is compliant with the ISO requirements. A project containing measurements from the source and receiving rooms for different sound source positions is created during the measurement process. The project is saved in the memory of the sound meter along with the measurement files. |
Optional Accessories
![[977D-EN]-SV977D_OPTIONAL](https://gaxcesensors.com/wp-content/uploads/2024/09/977D-EN-SV977D_OPTIONAL.jpg "[977D-EN]-SV977D_OPTIONAL")
