SV 977D is an all-digital, Class 1 Sound & Vibration level meter designed for
general acoustic and vibration, environmental noise, occupational health and
building acoustic measurements.
Three acoustic or vibration user configurable profiles allow parallel
measurements with independently defined frequency filters and RMS detector
time constants. Each profile provides significant number of results (like Spl, Leq,
Sel, Lden, LEPd, Ltm3, LTeq, Peak, Max and Min as well as ten statistics, two
rolling Leq, expected Leq value, standard Leq deviation and noise criterium and
noise ratio indexes in case of sound measurements or RMS, Ovl, Peak, P-P in
case of vibration measurements). Advanced time history logging for each profile
provides complete information about the measured signal. Data are stored on a
micro SD memory card and can be easily downloaded to a PC over the USB
interface. Optional RS 232 interface can be used for the connection of the
instrument with the device that provides this type of connection (e.g. printers).
Direct printing feature enables quick on-site printing with the use of optional
portable printer.
All required weighting filters: A, B, C, Z, U, AU and LF for sound measurements
and HP1, HP3, HP10, Vel1, Vel3, Vel10, VelMF, Dil1, Dil3, Dil10 and Wh for
general vibration measurements (like acceleration, velocity and displacement);
are available with this instrument.
Using the computational power of its digital signal processor SV 977D can,
simultaneously to the meter mode, perform the real time 1/1 Octave or
optionally 1/3 Octave analysis including calculations of statistical levels or can
optionally perform FFT analysis.
The built-in frequency analyser offers 1/1 octave and 1/3 octave real-time
analysis as standard features and FFT as optional function. The frequency
analysis is logged together with the time history of sound or vibration meter
results.
Time domain waveform signal recording on the SD-card is available as an option
and advanced trigger and alarm functions are available in the standard version
of this instrument.
For building acoustic applications, SV 977D offers Reverberation Time
measurements (RT60) option working with the BA Assistant application for
smartphones.
SV 977D enables also STIPA calculations in accordance with IEC 60268-16:2011 as optional function.
A fast USB 2.0 interface creates a real-time link for the PC "front-end" application that allows to control the
instrument with the use of SvanPC++ software. Optional RS 232 interface allows the instrument to control the
cellular modem when SV 977D is used with the SV 277 monitoring station.
SV 977D is equipped with Bluetooth
®
1
v.5.2 and can be remotely control by the SvanMOBILE and BA Assistant
smartphone applications.
Working as a part of the SV 277 monitoring station, equipped with the cellular modem, SV 977D can transfer
measured data via Internet to PC with the use of SvanPC++_RC option or via SvanNET web service. The
instrument can be fully remotely controlled via these programs. The instrument has advanced alarms features,
enables the user notification about exceeded threshold levels by SMS or mails.
The instrument is powered from four AA standard alkaline or rechargeable batteries (i.e. NiMH – a separate
charger is required). Powering the instrument from the External DC power source or the USB interface is also
possible.
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