CESVA SC160 User manual

SC160
Integrating Sound Level Meter
Real time frequency Analyser* in Octave Band
The SC160 is a user-friendly, low cost, class 2 integrating
sound level meter and real time octave band spectrum ana-
lyser that allows you to make sound measurements quickly,
conveniently and easily. It has a single range, so there is no
need to make any range adjustments.
The SC160 simultaneously measures all the functions for each
function mode (sound level meter or spectrum analyser ) with
A, C, and Z frequency weightings . The SC160’s graphic
screen provides graphical and numerical representation of the
functions measured.
The data measured and recorded by the SC160 can be trans-
ferred to a personal computer so that they are available in
electronic format. The AC output allows you to
obtain the signal from the preamplifier and
make a calibrated recording on D.A.T.
The microphone is detachable. It can therefore
be uncoupled and moved away from the SC160
by means of an extension cable (CNR-ITV).
The SC160 can be used as either a sound level
meter or a spectrum analyser and room
noise evaluator by NC and NR curves.
The sound level meter mode is ideal for
measuring overall sound pressure lev-
els. The SC160 simultaneously meas-
ures all functions with all frequency
weightings and calculates statistical
data as maximum and minimum val-
ues and percentiles.
The spectrum analyser mode allows
you simultaneously and in real time
to measure the sound levels and
peak levels for octave bands from
31,5 Hz to 16 kHz and the overall
sound pressure levels and peak lev-
els A, C and Z with frequency weight-
ings.
Within the analyser mode there is a
special screen to evaluate room noi-
se, especially designed for HVAC
system installers, engineers, and
consultants, that allows you to asses
noise in real time using the NC and
NR curves criterion.
.
Applications
• Evaluation of the noise exposure of
workers at workplace simultaneously
to the verification of PPE (Personal
Protective E uipment)
• Room acoustics: NC and NR evalua-
tion, measurement of the reverbera-
tion time
• Evaluation of noise from machinery
• Sound insulation inspections
User friendly
• Measures all parameters simultane-
ously with A, C and Z fre uency
weightings
• One single range 30-137 dBA; up to
140 dB peak
• Backlit graphic screen and soft touch
keyboard for easy use
Features
• Class 2 integrating sound level meter
meeting IEC 61672, IEC 60651:01 class
2, IEC 60804:00 type 2, ANSI S1.4:83
(A1 :85), ANSI S1.43:97 standards
• Real time octave band spectrum ana-
lyser* 31.5 Hz–16 kHz. ANSI S1.11:86
• Real time room noise evaluator by NC
and NR curves
• Reverberation time measurement in
real time for octave bands (Optional)
• Measurement results can be stored in
the memory
• Includes software and cable for real
time retrieval of all the measured and
recorded data and their transmission
to a PC
• Real time data transmission through
wireless communication system Blue-
tooth
®
• Detachable microphone for use of the
extension cable (CNR-ITV)
• Stores in memory the time and date of
the last time the sensitivity was modi-
fied
*ATTENTION : The Spectrum Analyser
mode in octave bands is optional. Refer-
ence number SC160sb does not have
this option. If you ish to incorporate it
you should acquire module FB160. Refer-
ence number SC160cf does incorporate
the analyser mode in octave bands
.
D_SC160_v0040_20110105_ENG

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SC160
Diagram of the screens structure
Available functions
Sound level meter mode
L
AF
L
CF
L
ZF
L
AFmax
L
CFmax
L
ZFmax
L
AFmin
L
CFmin
L
ZFmin
L
AS
L
CS
L
ZS
L
ASmax
L
CSmax
L
ZSmax
L
ASmin
L
CSmin
L
ZSmin
L
AI
L
CI
L
ZI
L
AImax
L
CImax
L
ZImax
L
AImin
L
CImin
L
ZImin
L
AT
L
CT
L
ZT
L
ATmax
L
CTmax
L
ZTmax
L
ATmin
L
CTmin
L
ZTmin
L
At
L
Ct
L
Zt
L
AE
L
CE
L
ZE
L
Apeak
L
Cpeak
L
Zpeak
t, T
L
1
, L
5
, L
10
, L
50
, L
90
, L
95
, L
99
Nom Description of sound level meter mode functions
L
XF
Sound pressure level with fast time weighting (Fast)
L
XS
Sound pressure level with slow time weighting (Slow)
L
XI
Sound pressure level with impulse time weighting (Impulse)
L
XT
Equivalent continuous sound pressure level with T integration time
L
Xt
Equivalent continuous sound pressure level of the entire measurement
L
XE
Sound exposure level S.E.L.
L
Xpeak
Peak sound pressure level
t Measurement time
T Integration time
L
n [n=1, 5, 10,
50, 90, 95, 99]
Percentiles, with A frequency weighting
31,5 63 125 250 500 1k 2k 4k 8k 16k
Nom Description of analyser* mode 1/1 functions
L
XT
Equivalent continuous sound pressure level with T integration time
L
XT_f
Equivalent continuous sound pressure level with T integration time for the f octave band
selected. (See graphic below)
L
Xpeak
Peak Sound pressure level
L
Xpeak_f
Peak Sound pressure level for the f octave band selected. (See graphic below)
NC NC curve not exceeded by the measured spectrum
NR NR curve not exceeded by the measured spectrum
NC_f NC curve not exceeded by the measured spectrum in the f band. (See graphic below)
NR_f NR curve not exceeded by the measured spectrum in the f band. (See graphic below)
Analyser* mode 1/1
L
AT
L
CT
L
ZT
L
AT_f
L
CT_f
L
ZT_f
L
Apeak
L
Cpeak
L
Zpeak
L
Apeak_f
L
Cpeak_f
L
Zpeak_f
NC, NC_f
NR, NR_f
where f: [31,5 .. 16 kHz]
X: Frequency weighting A, C and Z
umeric screen
Sound level meter mode Analyser* mode 1/1
Graphic screen
Statistical screen
umeric screen
Graphic screen
C screen
2

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Standard accessories
FNS-020 Case
PVM-05 Windscreen
STF030 Program for PC
CN-201 Cable for connection to a PC
9 volts battery
Optional accessories
CB006 Class 1 acoustic calibrator
CB004 Class 2 acoustic calibrator
CNR-ITV Microphone extension cable
CN-USB Serial-USB converter cable
CN-DAT AC output audio cable
TR-40 Tripod (height 1.1 m)
TR050 Tripod (height 1.55 m)
TR002 Tripod support for cable CNR-ITV
A-200 Mains feeder 230 V 50 Hz to 9 V
A-100 Battery converter 12 V to 9 V
ML-50 Transport briefcase (49 x 36 x 14 cm)
ML-10 Transport briefcase (39 x 32 x 12 cm)
ML060 Special outdoors transport briefcase (51x38x15 cm)
IM003 Printer 40 columns serial
RT-030 Reverberation time module
TK1000
Outdoor kit
SC160
Accessories
Audio cable for the sound level meter,
C -DAT
Mains feeder A-200 and battery converter
Extension cable for microphone, C R-ITV
3

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SC160
Storage capacity
Sound Level Meter mode
Kind of recording
All each second 1 hour 30 minutes
F1, F2 and F3 each second
(1)
36 hour 21 minutes
F1 each second
(1)
84 hour 50 minutes
L
T
and partial percentiles every T
T= 1 s 12 hours
T= 1 min 1 month
T= 1 hour 5 years
Spectrum Analyser* mode in 1/1 octave band
Kind of recording
L
T
+ L
peak
of each octave band
L
T
+ L
peak
global with A, C and Z frequency weighting
Each T
T=1 s 4 hours 45 minutes
T=1 min 11 days 21 hours
T=5 min 2 months
T=1 hour 2 years
The SC160 can store in its internal memory the values of the func-
tions measured. When the unit is switched off, the data is saved
and may be retrieved and displayed directly from the SC160 or
transferred to a PC. The memory may be erased directly from the
SC160.
In the memory of the SC160 may be stored the final results of a
measurement or continuous recordings of functions with program-
mable register time.
(1)
F1, F2 and F3 are the acoustic functions
selected by the user on the preferential
screen. They may be any of the 54 differ-
ent functions the SC160 measures in
sound level meter mode.
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SC160
Technical specifications
Standards and specifications
Complies with the following standards.
• EN 61672 class 2, EN 60651:94 (A1:94) (A2:01) class 2, EN
60804:00 type 2, EN 61260:95 (A1:01) class 2
• IEC 61672 class 2, IEC 60651:01 class 2, IEC 60804:00 type 2, IEC
61260:95 (A1:01) class 2
• ANSI S1.4:83 (A1:01) type 2, ANSI S1.43:97 (A2:02) type 2, ANSI
S1.11:04
• Mark complies with 73/23/CEE and CEM 89/336/CEE low-
tension regulations, the latter amended by 93/68/CEE.
Measurement range
• L
F
, L
S
, L
I
, L
T
and L
t
Indicator limits: 0 – 137 dB
Primary range A C Z
Upper limit 113 113 113
Lower limit 36 36 40
Measurement range:
Upper limit: 137 137 137
Crest factor 3: 130 130 130
Crest factor 5: 126 126 126
Crest factor10: 120 120 120
Lower limit: 19 21 32
• L
peak
Indicator limits: 0 – 140 dB
Peak detector Lpeak
Onset time constant < 75 µs
Noise
• Electrical noise: A C Z
Maximum 12 12,1 23,1
Typical 9,1 11,4 18,5
• Total noise (electrical + thermic of the microphone):
Maximum 27,1 31,0 39,0
Typical 25,3 29,0 35,0
Fre uency weighting
Complies with the EN 61672, EN 60651 and EN 60804 type 2 standard
Weightings A, C and Z
AC output
Frequency weighting: linear
Sensitivity to 137 dB and 1 kHz (Gain = 0dB): 3,8 Vrms (max)
Upper limit: 7 Vpeak ; Output impedance: 100 Ω
Gain: 0 and 40 ± 0,2 dB
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SC160
Technical specifications
Microphone
• Model P-05: ½” Condenser microphone with preamplifier.
Equivalent impedance: 3000 Ω. Nominal sensitivity: 16,0 mV/Pa in refer-
ence conditions.
Time weighting
L
F
, L
S
, L
I
according class 2 tolerances
Parameters
See table| Resolution: 0,1dB
Octave filters
Class 2 according to EN 61260:95/ A1:01. Nominal octave bands central
frequency: 31,5, 63, 125, 250, 500, 1000, 2000, 4000, 8000, 16000 Hz
Influence of humidity
Operation range: 25 to 90 %
Maximum error at 25%<R.H.<90% at 40 ºC and 1 kHz:
0,5 dB
Storage without batteries: < 93 %
Effects of magnetic fields
In an 80 A/m magnetic field (1 oersted) at 50 Hz, a reading of less than
25dB(A) is given
Influence of temperature
Operation range: -10 to +50 ºC
Maximum error (-10 to +50ºC): 0,5 dB
Storage without batteries: -20 to +60 ºC
Effects of vibrations
For frequencies between 20 and 1000 Hz and 1 m/s
2
: < 75 dB(A)
Battery
9 V Battery type 6LF22.
Battery life with continuous use:
• Sound Level Meter mode: 8 hours
• Spectrum Analyser mode: 6 hours
Mains feeder: A-200
Dimensions and weight
Dimensions: 294 x 82 x 19 mm
Weight:
• With battery: 508 g
• Without battery: 466 g
82 mm
19 mm
341 mm
82 mm
6

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SC160
Cesva Capture Studio Software
Real time data acquisition
Graphical display of data
Room noise evaluation ( C curves)
The SC160 is supplied with the software application CAP-
TURE Studio that allows you to:
• Configure the SC160
• Retrieve data from the SC160 in real time.
• Download registers from the SC160 memory to a PC.
• Erase the SC160 memory.
• Display graphically and numerically the data files and convert
them into different formats (.txt, .xls, .mdb)
• System of encrypted file. The files are saved in their own
.ccf format and cannot be changed which guarantees their
total integrity and legality.
Data exportation to other applications
CAPTURE Studio provides you with a convenient, use-
friendly environment for obtaining, in digital format, data ac-
quired by the SC160, it runs in PC with Windows 9x/Me/2000/
NT/XP/VISTA/7.
The characteristics, technical specifications and
accessories may vary without prior notice
7

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SC160
Reverberation time module
30
40
50
60
70
80
90
100
110
The module of reverberation time measurement of the SC160
Sound Level Meter allows:
• The simultaneous measurement of T
20
and T
30
reverberation
times by the interrupted noise method for the octave bands of
63, 125, 250, 500, 1000, 2000, and 4000 Hz.
T
30
Is the time, expressed in seconds, that it is required for
the sound pressure level to decrease by 60 dB. The T
30
is the result of multiplying by 2 the time that it takes for
the level to decrease by 30dB.
T
20
Is the time, expressed in seconds, that it is required for
the sound pressure level to decrease by 60 dB. The T
20
is the result of multiplying by 3 the time that it takes for
the level to decrease by 20dB.
• Measurement range (depends on the frequency band):
TR minimum: 0,2 s
TR maximum: 10,0 s
• The automatic detection of the decay curve and its slope es-
timation through a least square approximation.
• Decay curves calculated from the averaging time between
10 ms and 40 ms depending on the frequency band.
• The possibility of storing the results in memory: Values of
T
20
, T
30
and decay curves, for all octave bands.
The reverberation time module for the SC160 is optional and may
be purchased when buying the SC160 or later. All SC160 pur-
chased before this date may be upgraded with this module.
Below a graphic is shown with the steps that must be followed to
make a reverberation time measurement.
Storage Capacity
Reverberation time (T
20
and T
30
) + Background noise
(L
N
) + maximum level (L
N
+ ∆) + decay time history
100 measure-
ments
Reverberation time mode in 1/1 oc-
tave bands
Calculation and measurement stan-
dards
• ISO 3382-1:2009 Measurements of
the reverberation time in perform-
ance spaces.
• ISO 3382-2:2009 Measurements of
the reverberation time in ordinary
rooms.
• ISO 354:1985: Measurement of the
coefficient absorption in a reverbera-
tion room.
• ISO 140:1998: Measurement of
sound insulation in buildings and of
building elements.
Procedure for the RT measurement
1. Switch the SC160 to RT mode
2. Press to start the measurement
process
3. Validate the background noise by
pressing
4. Progressively increase the sound pres-
sure level by starting the sound source
5. When the source emits the necessary
sound pressure level and the acoustic
field reaches the stationary state, press
to validate this level
6. Stop the noise emission
7. A few seconds after the noise emission
stops the RT values will appear on the
screen of the SC160.
Maximum level (L
N
+ ∆)
Background
noise L
N
∆
8

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SC160
Dosimeter module for the assessment of
noise in the workplace
The dosimeter module of the SC160 for the assessment of noise in
the workplace adds a new measurement mode that is ideal for the
application of Directive 2003/10/CE, which adapts the regulation on
protection of the health and safety of workers from the risks of expo-
sure to noise, to technical progress. In the member states, the cor-
responding transposition to national law applies.
This dosimeter module allows you to simultaneously measure all
parameters needed to assess the levels of noise to which workers
are exposed when wearing hearing protectors, or not, (SNR, HML,
Octaves).
The SC160 measures, simultaneously, the equivalent level with A
and C frequency weighting [ L
At
, L
Ct
], daily noise exposure level
[ L
EX,8h
] (ISO 1999), noise exposure in Pa
2
h [ E ] and noise dose
[ DOSE ] with reference to a programmable criterion level [ L
C
],
and, of course, also the Peak Level with C frequency weighting
[L
Cpeak
] (ISO 1999).
Moreover, the SC160 allows you to carry out the measurement dur-
ing a time shorter than the exposure time, because it shows on the
screen all parameters projected to the expected exposure time
(programmable projection time [ t
p
] ).
To evaluate the exposure to noise, taking into account the attenua-
tion of the individual hearing protectors worn by the worker, the
SC160, besides measuring the equivalent level with A and C fre-
quency weightings [ L
At
, L
Ct
] (SNR and HML method), simultane-
ously carries out a real time frequency analysis with A frequency
weighting and by octave bands from 63 Hz to 8 kHz (Octave
method).
The large memory of the SC160 allows you to store the time history
of the parameters measured, and afterwards recalculate them for
any desired time interval.
The SC160 helps you to asses and measure the exposure to noise
and also brings you all the data needed to inform and train workers
with regard to the significance and potential risks of the results of
the assessment and measurement.
Moreover, It helps you to design and run a reduction programme
and to choose the most suitable hearing protectors.
The dosimeter module for the assessment of noise in the workplace
is not included with the SC160. It is an optional module and it can
be acquired when buying the SC160 or later.
Dosimeter module for the assess-
ment of noise at workplace
umeric screen
Graphic screen
1/1 Spectrum analyser* screen
umeric screen (projected parameters)
9