PCE Health and Fitness DSA 50 User manual

www.pce-industrial-needs.com
Tursdale Technical Services Ltd
Unit N12B
Tursdale Business Park
Co. Durham
DH6 5PG
United Kingdom
Phone: +44 ( 0 ) 191 377 3398
Fax: +44 ( 0 ) 191 377 3357
[e-mail]
http://www.industrial-needs.com/
Manual
Sound level meter
PCE DSA 50

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Manual.....................................................................................................................................1
Sound level meter....................................................................................................................1
PCE DSA 50............................................................................................................................1
1. FEATURES OF THE INSTRUMENT ...................................................................................4
1.1. Accessories .................................................................................................................................. 4
1.2. Weatherproof accessories set for microphone............................................................................. 5
1.3. System configuration................................................................................................................... 6
1.4. Measured quantities..................................................................................................................... 7
1.4.1. Sound level meter (SLM) mode............................................................................................... 7
1.4.2. 1/1-octave analyzer mode ........................................................................................................ 7
1.4.3. 1/3-octave analyzer mode........................................................................................................ 8
1.4.4. Infra G filter mode ................................................................................................................... 8
1.5. Specifications............................................................................................................................... 8
1.5.1. Specifications for SLM mode............................................................................................ 12
1.5.2 1/1-octave analyzer mode........................................................................................................ 14
1.5.2. 1/3-octave analyzer mode .................................................................................................. 16
1.5.3. Infra G filter mode ............................................................................................................. 20
1.6. Influence of operating environment........................................................................................... 21
1.7. Influence of instrument accessories........................................................................................... 21
2. CONTROLLING OF THE INSTRUMENT .........................................................................24
2.1. Control keys............................................................................................................................... 24
2.2. Input and output connectors of the instrument........................................................................... 25
2.3. Default instrument settings .................................................................................................... 27
2.4. Preparation of the instrument to operation................................................................................. 27
3 . O P E R A T I O N ..............................................................................................................28
3.1. Instrument data plate.................................................................................................................. 28
3.2. SETUP menu ............................................................................................................................. 29
3.3. RESULTS menu........................................................................................................................ 30
3.3.1. SLM mode ............................................................................................................................. 31
3.3.2. 1/1-octave analyzer................................................................................................................ 32
3.3.3. 1/3-octave analyzer mode ...................................................................................................... 33
3.3.4. Infra G filter mode ................................................................................................................. 34
3.4. SETUP TIME menu................................................................................................................... 35
3.5. FILTER menu............................................................................................................................ 36
3.6. MEMORY menu ....................................................................................................................... 37
3.6.1. Save measure ......................................................................................................................... 37
3.6.2. Load measure......................................................................................................................... 38
3.6.3. Measurement history.............................................................................................................. 38
3.6.3.1. SLM mode ........................................................................................................................... 39
3.6.3.2. 1/1-octave analyzer mode.................................................................................................... 40
3.6.3.3. 1/3-octave analyzer mode.................................................................................................... 41
3.6.3.4. Infra G filter mode............................................................................................................... 41
3.6.4. FREE/OCCUPIED menu....................................................................................................... 42
3.7. CLEAR menu ............................................................................................................................ 42
3.7.1. Measure in memory ............................................................................................................... 43
3.7.2. Measurement history.............................................................................................................. 43
3.7.3. Entire memory ....................................................................................................................... 44
4 . C O M M U N I C A T I O N WI T H C O M P U T E R .............................................................44
5.1. Recommendations for correct performing of measurements..................................................... 45

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5.2. Internal battery........................................................................................................................... 45
5.3. Calibration of the instrument..................................................................................................... 45
5.4. Warranty .................................................................................................................................... 46
5.4.1. Complaint instructions for the purchaser:.............................................................................. 46
5.5. Maintenance and repair.............................................................................................................. 47
6. CE MARKING AND CONFORMANCE TO EU COUNCIL DIRECTIVES .......................47
Appendix A. Filter characteristics......................................................................................47
Appendix B. Directional responses ...................................................................................51
Appendix C. Sensitivity to vibration ...................................................................................53

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1. FEATURES OF THE INSTRUMENT
Digital sound analyzer model DSA-50 is the instrument combining the features of
integrating sound level meter as well as 1/1- and 1/3-octave band frequency analyzer.
The majority of quantities characterizing occupational, environmental and other kinds
of acoustic noise can be measured by this Class 1 digital-signal-processing instrument.
DSA-50 is designed to be capable to perform long-lasting measurements without need
of battery recharging. Internal battery allows for at least 24h continuous operation of the
instrument provided microphone heating is turned off. External battery or mains adaptor may
be also used.
The instrument is equipped with USB 1.1 interface to enable bi-directional communication
with PC.
1.1. Accessories
Basic accessories:
 Model 5014 external power supply (Mascot).
 Instruction Manual.
 Declaration of Conformity.
 Warranty Card.
 Certificate of Verification.
 OP 1/2 microphone windscreen.
 Carrying case.
 1.8 m USB interface cable.
 DSA-50 computer software for instrument remote operation (PC under MS
Windows 98SE/ME/2000/XP required).

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 DSA Monitor computer software for data display, readout and analysis (PC
under MS Windows 98SE/ME/2000/XP required).
Additional accessories:
 Built-in microphone heating system.
 Watertight carrying case.
 KA-50 sound calibrator.
 CV-06 external supply source together with 8614 power supply (Mascot).
 Weatherproof accessories set for microphone.
 Microphone extension cable PD5Lx (x stands for cable length, max. 6 m).
 Microphone extension cable PD7Lx (x stands for cable length, max. 6 m).
 Supporting stand for microphone: SM2 (2 m height) and SM4 (4 m height).
 Supporting stand for the instrument: SMR (1.5 m height).
1.2. Weatherproof accessories set for microphone
This set enables to convert WK-21 microphone into WK-21WP weatherproof microphone.
It consists of:
 weatherproof version of microphone protecting grid, model SM,
 rain cover, model OK,
 windscreen with anti-bird spikes, model TOP,
 microphone holder.
To assemble weatherproof microphone proceed as follows:
 Fasten the part (2) of microphone holder to microphone extension cable PD7Lx
and next connect this cable to microphone-preamplifier assembly (1) (see Fig. 1.2).
 Put part (3) of microphone holder on microphone-preamplifier assembly (1)
and then screw it to part (2) of microphone holder fastened earlier to extension cable (see
Fig. 1.2).
 Remove standard protecting grid (4) from WK-21 (see Fig. 1.3).
WARNING! During this and next action particular care should be observed as the
microphone diaphragm is exposed after protection grid removing and may be easily
damaged!
 Screw SM weatherproof protecting grid (5) to the microphone (see Fig. 1.4).
 Put OK rain cover (6) on the microphone (see Fig. 1.4).
 Put TOP windscreen with anti-bird spikes (7) on the microphone assembled
as above (see Fig. 1.5) until the windscreen reaches microphone holder.
 Fig. 1.6 shows completely assembled weatherproof microphone WK-21WP.
1
3

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Fig. 1.2. Assembling of weatherproof accessories – step 1.
1
4
Fig. 1.3. Assembling of weatherproof accessories – step 2.
6
5
Fig. 1.4. Assembling of weatherproof accessories – step 3.
7
Fig. 1.5. Assembling of weatherproof accessories – step 4.
Fig. 1.6. Completely assembled weatherproof microphone WK-21WP.
1.3. System configuration
Basic configuration:
 DSA-50 digital sound analyzer (manufacturer: SONOPAN).
 PW21LG ½” microphone preamplifier (manufacturer: SONOPAN).
 WK-21 ½” measurement microphone (manufacturer: SONOPAN). Other
accessories specified in chapter 1.1 are optional.

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1.4. Measured quantities
Many quantities used to characterize acoustic noise can be measured simultaneously
using DSA-50 digital sound analyzer. The set of measured quantities depends on
instrument operating mode. Measurement duration and battery condition information is
displayed at every operating mode.
1.4.1. Sound level meter (SLM) mode
For two frequency weightings, selected among from three ones: A, C and Z available in
the instrument, following quantities can be measured simultaneously (in symbols listed
below X stands for selected frequency weighting):
 LXF current RMS, F-time-weighted sound level,
 LXFmn minimum RMS, F-time-weighted sound level,
 LXFmx maximum RMS, F-time-weighted sound level,
 LXS current RMS, S-time-weighted sound level,
 LXSmn minimum RMS, S-time-weighted sound level,
 LXSmx maximum RMS, S-time-weighted sound level,
 LXI current RMS, I-time-weighted sound level,
 LXImn minimum RMS, I-time-weighted sound level,
 LXImx maximum RMS, I-time-weighted sound level,
 LXPk current peak sound level,
 LXMPk maximum peak sound level,
 LXeq time-ave
r
age (equivalent continuous) sound
 LXe
q
1s time-ave
r
age sound level fo
r
last one second.
If A frequency weighting is one of two selected weightings, then following quantities
are measured additionally for this weighting:

L
A
Esound exposu
r
e level,

L
A
E
X
,T noise exposu
r
e level referred to specified exposu
r
e
1.4.2. 1/1-octave analyzer mode
1/1-octave analyzer contains nine digital octave-band filters having exact centre
frequencies specified for binary octave ratio. Nominal centre frequencies are 31.5Hz,
63Hz, 125Hz, 250Hz,500Hz, 1kHz, 2kHz, 4kHz and 8kHz. Specifications of filters conform
to Class 1 requirements of EN 61260:1995 and EN 61260:1995/A1:2001.
Following quantities can be measured simultaneously for each filter centre frequency (and
also for wide-band response), when one frequency weighting is selected among from
three available weightings (A, C and Z):

LFcurrent RMS, F-time-weighted sound level,

LScurrent RMS, S-time-weighted sound level,

Le
q
time-ave
r
age sound level.

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If A frequency weighting is selected, then following quantities are measured additionally:

LASmx maximum RMS,
A
-frequenc
y
-weighted, S-time-weighted sound
l
l

LAeq time-ave
r
age
A
-frequenc
y
-weighted sound level,

LCMPk maximum peak C sound level.
1.4.3. 1/3-octave analyzer mode
1/3-octave analyzer contains twenty nine digital 1/3-octave band filters having exact
centre frequencies specified for binary octave ratio. Nominal centre frequencies are 25Hz,
31.5Hz, 40Hz,50Hz, 63Hz, 80Hz, 100Hz, 125Hz, 160Hz, 200Hz, 250Hz, 315Hz, 400Hz,
500Hz, 630Hz, 800Hz, 1kHz, 1.25kHz, 1.6kHz, 2kHz, 2.5kHz, 3.15kHz, 4kHz, 5kHz, 6.3kHz,
8kHz, 10kHz, 12.5kHz and 16kHz. Specifications of filters conform to Class 1
requirements of EN 61260:1995 and EN 61260:1995/A1:2001.
Following quantities can be measured simultaneously for each filter centre frequency (and
also for wide-band response), when one frequency weighting is selected among from
three available weightings (A, C and Z) and when one time weighting is selected
among from two available weightings (F and S):
L current RMS sound level,

Le
q
time-ave
r
age sound level.
1.4.4. Infra G filter mode
Following quantities can be measured simultaneously:

LGS current RMS, G-frequenc
y
-weighted S-time-weighted sound level,

LGSmn minimum RMS, G-frequenc
y
-weighted S-time-weighted sound

LGSmx maximum RMS, G-frequenc
y
-weighted S-time-weighted sound

LIPk current peak sound level in infrasound band,

LIMPk maximum peak sound level in infrasound band,

LGe
q
G-f
r
equenc
y
-weighted time-ave
r
age sound level.
1.5. Specifications
DSA-50 digital sound analyzer conforms to requirements of following standards:
& EN 61672-1:2002 Electroacoustics – Sound level meters – Part
1: Specifications.
& EN 61260:1995/A1:2001 Electroacoustics – Octave-band and fractional-
octave- band filters.
& ISO 7196:1995 Acoustics – Frequency-weighting characteristic for
infrasound measurements.
DSA-50 conforms to electromagnetic compatibility (EMC) requirements specified
in EN 61672-1:2002 for X group instruments.

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
A
ccu
r
acy class 1
Readout resolution 0.1dB
Maximum sound pressu
r
e level can be applied
without causing damage to the inst
r
ument 150dB (3%
T
HD
)
Maximum elect
r
ical voltage can be applied at
inst
r
ument elect
r
ical input facility without
damage to the inst
r
ument 22Vp-p
Capacitance of elect
r
ical input facility 18pF
Reference conditions:
- t
y
pe of sound field free field
- reference f
r
equency 1000Hz
- reference sound pressu
r
e level 94dB
- reference level range:
°
fo
r
1/1- and 1/3-octave anal
y
ze
r
mode 65
–
° for infra G filter mode 65 –
Specifications common for all operating modes:
° for SLM mode 55 – 135dB
- sampling frequency:
° for SLM, 1/1- octave and 1/3-octave mode 52.1kHz
° for infra G filter mode 17.4kHz
- Mic
r
ophone
r
efe
r
ence di
r
ection mic
r
ophone s
y
mmet
r
y axis
- mic
r
ophone
r
efe
r
ence point mic
r
ophone diaph
r
agm cent
r
e
- reference o
r
ientation sound wave ar
r
iving f
r
om refe
r
ence
direction
- reference temperatu
r
e +23°C
- reference humidity 50% RH
- reference static p
r
essu
r
e 101.325kPa
Pe
r
missible er
r
o
r
fo
r
sinusoidal reference signal
(p
r
ogressive sound wave incident
di
l
l
to mic
r
ophone diaph
r
agm, 94dB, 1000Hz)  0.7dB
Operating temperatu
r
e
r
ange -10  +50°C
Storage tempe
r
atu
r
e
r
ange -10  +50 °C
Operating humidity
r
ange  90% RH (no
)
Operating static p
r
essu
r
e range 65  108kPa
Elect
r
omagnetic emission within the limits specified in
EN 61672-1:2002 (maximum
emission when operating
exte
r
nal powe
r
suppl
y
)
Wa
r
m-up time:
- after turn-on 1 minute
- after environmental conditions change 15 minutes
Measurement duration 99h 59m 58s (set with 1s o
r
infinite)
)
Se
r
ial communication interface USB 1.1
Dimensions (without mic
r
ophone) 237 x 84 x 50 mm
Powe
r
supply

- i
n
-
e
Mi
n
Co
n
mi
c
We
No
m
f
r
o
m
 Differe
and electr
o
difference
s
n
te
r
nal ba
t
e
xte
r
nal p
o
n
imum op
e
n
tinuous o
cr
ophone
h
ight
m
inal cor
r
e
m
inst
r
um
e
nces bet
w
o
static act
u
s
t
tery
o
we
r
suppl
y
e
rating volt
a
perating ti
m
h
eating tu
r
n
e
ctions fo
r
e
nt case (f
r
w
een WK-2
u
ator resp
o
y
a
ge of int
e
m
e (batter
y
n
ed off)
effects of
r
ee field, 0
1 microph
o
o
nse; exp
a
er
nal batte
r
y
fully
r
eflection
° incidenc
e
o
ne free fi
e
a
nded (k=
2
NiM
H
Masc
r
y5.5V
24h
600g
e
)Seet
a
e
ld freque
n
2
) uncertai
i
H
6V 2.1
A
h
ot 5014 (9
V
a
ble belo
w
n
cy respo
n
nty of the
d
i
nfo@tursdalete
c
V, 350m
A
)
w
n
se at 0° i
n
d
etermina
t
c
hnicalservices.c
o
)
n
cidence
t
ion of the
s
o
.uk
10
s
e

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Fig. 1.7. Free-field correction for WK-21 microphone (0° incidence ).
Table below and Fig. 1.8 show typical free-field frequency response of WK-21 microphone
(relative to its sensitivity at 250Hz) together with maximum permissible deviations as
specified in EN 61094-4:1995.

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Fig. 1.8. Typical free-field frequency response of WK-21 microphone.
1.5.1. Specifications for SLM mode
Frequency weightings
A
, C, Z

A
C elect
r
ical output (sine, 1000 Hz)
- weighted f
r
equency response
A
, Z
- FSD output voltage fo
r
level range 14V
p
-
p
- maximum output volta
g
e 22V
p
-
p
- output impedance 1k
Ω
- load impedance 10k
Ω
Time weightings SLOW, F
A
ST, IMPULSE

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Sta
r
ting level fo
r
level linea
r
ity testing reference sound pressu
r
e
reference level range
 Maximum unweighted sound pressu
r
e level
not activating ove
r
load indication See table below
 Total range fo
r
L
A
sound level and L
A
e
q
time-ave
r
age sound level 18
–
13 d
B
A
 Total range for LCPk peak sound level 40
–
 Extents of measurement range at specified signal frequency, level range and
frequency weighting:
- for sound level (L) and time-average sound level (Leq)

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- for peak level (LPk)
WARNING! The extents of measurement range for peak level at A and Z
frequency weightings are determined for continuous 1000Hz sine signal;
measurement error extended by expanded measurement uncertainty is less than 1.1
dB.
 Self-generated noise
- measured with electrical input facility installed:
° at A frequency weighting 13dB
° at C frequency weighting 19dB
° at Z frequency weighting 25dB
- measured with WK-21 microphone installed:
° at A frequency weighting 19dB
° at C frequency weighting 24dB
° at Z frequency weighting 27dB
1.5.2 1/1-octave analyzer mode
Frequency weightings
A
, C, Z

A
C elect
r
ical output (sine, 1000 Hz)
- weighted f
r
equency response
A
, Z
- FSD output voltage fo
r
level range 14Vp-p
- maximum output volta
g
e 22V
p
-
p
- output impedance 1k
Ω
- load impedance 10k Ω
Time weightings SLOW, F
A
ST
 Extents of measurement range at specified level range and frequency weighting, for
time-weighted sound level L and time-average sound level Leq
(analyzer):

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 Extents of measurement range at specified octave bands and at most-sensitive level
range (5 – 75dB), for time-weighted sound level L and time-average sound level Leq
(analyzer):
 Extent of measurement range for LASmx maximum sound level and LAeq time-average
sound level (criterion values 17 – 135dB
 Extents of measurement range for LCPk peak sound level (criterion values)
 Self-generated noise
- measured with electrical input facility installed
- measured with WK-21 microphone installed

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1.5.2. 1/3-octave analyzer mode
Frequency weightings
A
, C, Z

A
C elect
r
ical output (sine, 1000 Hz)
- weighted f
r
equency response
A
, Z
- FSD output voltage fo
r
level range 14V
p
-
p
- maximum output volta
g
e 22V
p
-
p
- output impedance 1k
Ω
- load impedance 10k Ω
Time weightings SLOW, F
A
ST
 Extents of measurement range at specified level range and frequency weighting, for
time-weighted sound level L and time-average sound level Leq
Extents of measurement range at specified octave bands and at most-sensitive level
range(5 – 75 dB), for time-weighted sound level L and time-average sound level Leq

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• Self-generated noise
- measured with electrical input facility installed

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- measured with WK-21 microphone installed

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1.5.3. Infra G filter mode
 Extents of measurement range at specified level range and frequency weighting, for
time- weighted sound level L and time-average sound level Leq
Level range G
25 – 105dB TBD
45 – 125dB TBD
65 – 145dB TBD
Extents of measurement range for LPk peak sound level
Level range G
25 – 105dB TBD
45 – 125dB TBD
65 – 145dB TBD
WARNING! The extents of measurement range for peak level are determined
for continuous 10Hz sine signal; measurement error extended by expanded
measurement uncertainty is less than 1.1 dB.
Self-generated noise
- measured with electrical input facility installed
° at G frequency weighting TBD
- measured with WK-21 microphone installed:
° at G frequency weighting TBD
Frequency weightings G, I

A
C elect
r
ical output (sine, 1000 Hz)
- weighted f
r
equency response Z
- FSD output voltage fo
r
level range 14V
p
-
p
- maximum output volta
g
e 22V
p
-
p
- output impedance 1k
Ω
- load impedance 10k Ω

Time weightings SLOW

Total range for LG sound level and LGe
q
time-ave
r
age sound level TBD

Total range for LIPk peak sound level TBD