1.1 SV 977D AS SOUND LEVEL METER & ANALYSER
• Noise measurements (Peak, Max, Min, Spl, Leq, SEL, Lden, LEPd, Ltm3, LTeq, Leq statistics (Ln),
expected Leq value (EX), standard Leq deviation (SD), two rolling Leq (LR1 and LR2), measurement time
and overload time % (OVL) as well as noise criterium (NC) and noise ratio (NR) in case of 1/1 Octave
option) with Class 1 IEC 61672-1:2013 accuracy in the frequency range 20 Hz to 20 kHz with the MK 255
microphone.
• Parallel Impulse, Fast and Slow detectors for the measurements with A, B, C, Z, U, UA and LF frequency
filters.
• Two measurement ranges 25 dB RMS(A) ÷ 123 dB Peak (Low) and 35 dB RMS(A) ÷ 140 dB Peak (High).
• 1/1 Octave and optional 1/3 Octave real time analysis - 10 filters with centre frequencies 31.5 Hz ÷ 16 kHz
and 31 filters with centre frequencies 20 Hz ÷ 20 kHz, in accordance with Class 1 IEC 61260-1:2014.
• Optional reverberation time RT60 analysis function for 1/1 octave bands or 1/3 octave bands and three
total RMS levels (A, C and Z weighted) in accordance with the ISO 3382 standard.
• STIPA (speech
transmission index for public address systems) measurements of electro-acoustic and
acoustic environments effects that affect the speech intelligibility
in the room acoustics and/or public address
systems
.
• Optional Tonality analysis function.
1.2 SV 977D AS VIBRATION LEVEL METER & ANALYSER
• General Vibration measurements (acceleration, velocity and displacement) meeting ISO 20816-1:2016
standard in the frequency range depending on the parameters of the attached accelerometer, i.e. with the
SV 80 general purpose transducer is equal to 0.5 Hz ÷ 14 kHz.
• Parallel RMS, Max, Peak, Peak–Peak measurements.
• HP, HP1, HP3, HP10, Vel1, Vel3, Vel10, VelMF, Dil1, Dil3, Dil10 and Wh weighting filters.
• 1/1 Octave and optional 1/3 Octave real time analysis - 15 filters with centre frequencies 1 Hz ÷16 kHz,
and 45 filters with centre frequencies 0.8 Hz ÷ 20 kHz, Class 1 IEC 61260-1: 2014.
• Optional RPM measurement with the use of RPM probe, connected to the I/O socket of SV 977D.
• Optional FFT analysis with the single Total overall value, performed with preselected frequency weighting
filters and windows.
1.3 GENERAL FEATURES OF SV 977D
• Advanced Data Logger function including spectrum logging on the micro SD card
• 1/1 and 1/3 octave and FFT analyser (1/3 octave and FFT – optionally)
• Time domain waveform signal recording (option)
• Advanced trigger and alarm functions
• USB 2.0 interface (real time PC "front end" application supported)
• RS 232 interface
• Bluetooth
®
v.5.2
• GPS module
• Integration time programmable up to 24 h
• Power supply by four AA rechargeable or standard batteries
• Handheld, light weight and robust case
• Easy to use with menu driven user interface
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