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SV 977 Sound and Vibration Analyser

The SV 977D is a Class 1 Sound and Vibration meter designed for building acoustics, occupational noise and environmental noise measurements.

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The meter is a successor of SVAN 977A offering a new 1/2” microphone MK255 providing wide frequency range from 3 Hz and excellent long-time stability of sensitivity. The SV 977D has a built-in Bluetooth® interface for wireless connection with with smart-phone applications like Building Acoustics Assistant that extends measurement capabilities dedicated for building acoustics.

One unique feature of the SV 977D 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 SV 977D can be also used as the vibration level meter – simply by connecting a cable and a vibration sensor.

SV 977D Technical Specifications

Sound Level Meter & Analyser

Standards	Class 1: IEC 61672-1:2013, Class 1: IEC 61260-1:2014
Type approvals	approved according to WELMEC requirements
Microphone type	Microtech Gefell MK 255
Preamplifier type	SV 12L
Linear operating range to IEC 61672	23 dBA Leq÷140 dBA Peak
Total measurement range	16 dBA Leq÷140 dBA Peak
Internal noise	<16 dB LAeq
Frequency range	3 Hz ÷ 20 kHz
Weighting filters	A, B, C, Z, LF, U, AU
Time constants	Slow, Fast, Impulse
Profiles per channel	3
Min logging step	2 ms
Statistics	Ln (L1-L99)
Statistics in octaves or third octaves
Audio recording	option
1/1 octave
1/3 octave
FFT	option
RT60	option
STIPA	option
RPM	option

Vibration Level Meter & Analyser

Standards	ISO 20816
Number of channels	1
Sensor type	IEPE
1/1 octave
1/3 octave
WAV recording	option
FFT	option
RPM	option

Hardware Features

Number of channels	1
Auto-calibration
Remote communication
Bluetooth
GPS module
Communication Interfaces	USB-C, I/O, RS232, Bluetooth 5.2
Display
Keyboard	9 keys
Memory	uSD 32 GB
Battery type	AA
Operating time	12-16 hours
Operating temperature range	-10 °C to 50 °C
Humidity range	up to 90 % RH, non-condensed
Weight	600 grams
Size	343 x 79 x 39 mm