SC420

Sound level meter and spectral analyser

SC420

Integrating Sound level meter class 1 with audio recording expandable to spectrum analyzer for third octave bands

INCLUDED Audio recording with pre-recording and voice comments
Increased storage with MicroSD memory card
Automated Parameters: timers, DEN thresholds, external input:
1) Auto start/stop of measurement and logging
2) Auto audio recording & pre-recording
Erasing backward (BACK ERASE function)
Built-in USB & BLUETOOTH® connectivity
Sensitivity, date & time change history
Ready for environmental monitoring:
1) Auto ON and automatic measurement and logging start
2) Downloads while measures
Free or diffuse sound-field correction options
Can be expanded with advanced measurement modes (see optional Modules)

Main Features

ON&PLAY SC420 ON&PLAY
The ON&PLAY philosophy has been developed to be intuitive – getting first time users up & running quickly & providing a stress-free return to measurements, even after long periods of inactivity.

ON&PLAY offers a simple and enjoyable experience from the first moment of contact with the device.

With ON&PLAY, measurement has never been so easy.

Removable MicroSD memory card
The information measured by the SC420 (final results and time histories), audio files and voice notes are saved on the MicroSD card inserted into the SC420.

Once the measurements are complete and the SC420 is powered-off, the MicroSD card can be removed and inserted into a computer. The data can then be transferred using the program 'Memory Download' – the download can be completed much faster this way.

4 GB class 4 microSD cards have been tested successfully.

Modular platform SC420 Modular Platform
The SC420 is an instrument that stands out for its power, versatility & ergonomics. It delivers high performance as a Class 1 integrating sound level meter (in accordance with IEC 61672, ANSI S1.4 and ANSI S1.43).

Thanks to its modular platform, the SC420 can be expanded with advanced measurement options such as 1/3-octave band spectral analysis, FFT analysis and reverberation time measurement.

Automated parameters SC420 Automated Parameters
The SC420 has a complete system of automated parameters, such as starting & stopping measurement and audio recording. Automatic timers and triggers are also available when exceeding threshold by DEN time-zones .

Its power and versatility offer infinite combinations which will provide optimal performance for even the most demanding of users.

Ready for environmental monitoring
The SC420 is designed to work as an automatic continuous noise monitoring unit. An environmental monitoring powering option is available, which allows measurements to be resumed after recovery from a power failure.

Optimal file structuring allows efficient data transfer & manipulation; this includes downloading while measuring and erasing parts that have already been downloaded.

Audio recording and voice comments
The SC420 can record audio files (listening quality), whilst it logs acoustic functions, facilitating its subjective evaluation and the recognition of sound sources.

USB and Bluetooth® connections
The SC420 communicates with a PC through a USB port and through Class 1 wireless Bluetooth® communication, in order to download & manipulate data, as well as allowing external control and real time visualization.

Back erase
With the Back erase function, the SC420 can delete the last 10 seconds of the measurement in progress. This option is ideal when unwanted noise events occur during measurement.

Optional Modules

OCCUPATIONAL NOISE (DS420)

Occupationa noise DS420

What does it measure?

Occupational noise mode simultaneously measures all the parameters necessary to evaluate the noise exposure of the worker with and without hearing protectors (SNR, HML and Octaves).

Applications

Industrial acoustic
Noise measurements for air conditioning installations (HVAC)
Sound Insulation measurements
Frequency analysis of industrial noise, environmental and labour
Background noise in rooms

1/1 OCTAVE FILTERS (OF420)

OCTAVE FILTERS (OF420)

What does it measure?

16 Hz to 16 kHz octave band filters analysis plus overall functions and NC and NR curves

Applications

Sound insulation measurements
Noise measurement for air conditioning installations ( HVAC)
Frequency analysis of industrial noise, environmental and labour
Background noise in rooms

1/3 OCTAVE FILTERS (TF420)

OCTAVE FILTERS (TF420)

What does it measure?

10 Hz to 20 kHz 1/3-octave band filters analysis plus overall functions

Applications

Sound Insulation measurements in third octave band
Assessment of environmental noise (Corrections for the presence of tonal and impulsive components and low frequency content)
Detection and identification of noise sources

REVERBERATION TIME (RT420)

REVERBERATION TIME (RT420)

What does it measure?

Reverberation time measurement by 1/1 and 1/3-octave bands using the interrupted noise and the integrated impulse response methods. Includes parameters for the evaluation of non-linear decay curves and the influence of the filters

Applications

Evaluation of the reverberation time of rooms
Measurement of sound absorption in a reverberation room
Measurement of soud insulation in buildings and of construction materials

FFT ANALYSIS (FF420)

FFT ANALYSIS (FF420)

What does it measure?

FFT Analysis of 10000 lines from 0 to 20000 Hz (2 Hz/line)

Applications

Detection and evaluation of the tonal components
Frequency analysis of continuous and transient signals (industrial and environmental)
Evaluation of tonal components according to ISO 1996-2 and DIN 45681.

WAVEFORM FILES RECORDING (HI420)

WAVEFORM FILES RECORDING HI420

What does it measure?

Records WAV (uncompressed) format audio files, 24 bits resolution, 48 kHz sampling frequency and constant gain for later analysis

Applications

This mode can be advantageous independently of the application in which it is being used as it allows a perfect acquisition of the audio signal, to carry out a post processing and obtain additional information.

Standards and certificates

Table of standards

IEC 61672-1:2002	Class 1 Sound level meter
IEC 61260:1995	/A1:2001 Class 1 Filters
OIML R 58:1998	Class 1 Sound level meter
OIML R 88:1998	Class 1 Integrating sound level
OIML R 130:2001	Class 1 Filters
ANSI S1.4-1983(R2006)	/ANSI S1.4a-1985(R2006) Class 1 Sound level meter
ANSI S1.43-1997(R2007)	Class 1 Integrating sound level
ANSI S1.11-2004(R2009)	Class 1 Filters
EN 61260:1995	/A1:2001 Class 1 Filters
EN 61672-1:2003	Class 1 Sound level meter
CE	Complies with 73/23/CEE and CEM 89/336/CEE low-tension regulations, the latter amended by 93/68/CEE.

Type-approval Certificates

España	11/09/2013: Type examination
	25/07/2013: Software
	07/10/2013: Additional 1 Type examination
	27/09/2013: Additional 1 Software
	11/11/2013: Additional 2 Software
	30/05/2014: Additional 3 Software
	07/11/2014: Additional 4 Software
	22/05/2015: Additional 5 Software

Portugal	17/02/2014: Type-approval Certificate

Software

CESVA Lab
The SC420 sound level meter measures a lot of functions for very long periods of time and also records audio files automatically. The best way to approach the analysis of all these functions together with the qualitative information provided by the audio files is to use the CESVA Lab software application.

Download and configure SC420 Download and configure
CESVA Lab is cost free and gives you a simple way to download all the information from the SC420 by simply removing the microSD card and post-process it. It also allows you configuring the SC420 from the PC.

View and Listen
Moreover, it provides an intuitive and user-friendly interface which allows numerically and graphically display of all the measurement information on the screen in several synchronized panels (spectrum and time history graphs and 3D spectrograms) and listen to the audio files for each sound event.

Export and Resport
To navigate through the information, CESVA Lab has an audio and mark browser and a very powerful zoom and pan tool for finding the desired section and then automatically generate a PDF report.

Edit and re-calculate
If what you want is to recalculate a section, simply select it, add it to a layer and simply calculate. Different layers, containing several sections, can be calculated simultaneously. Each layer is calculated and saved in a separate file.