SONOPAN DSA-50 User manual

January 2012

DIGITAL SOUND ANALYZER

DSA-50

Instruction Manual

P.P.U.H. "SONOPAN" sp. z o.o.

ul. Ciolkowskiego 2/2

PL-15950 Bialystok, Poland

Phone./fax +48 85 742 3662

http://www.sonopan.com.pl

C O N T E N T S

1. FEATURES OF THE INSTRUMENT........................................................................................4

1.1. Accessories...........................................................................................................................5

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...............................................................................................7

1.4.4. Infra G filter mode .........................................................................................................8

1.5. Specifications .......................................................................................................................8

1.5.1. Specifications for SLM mode.......................................................................................11

1.5.2. 1/1-octave analyzer mode.............................................................................................13

1.5.3. 1/3-octave analyzer mode.............................................................................................14

1.5.4. Infra G filter mode .......................................................................................................17

1.6. Influence of operating environment ....................................................................................17

1.7. Influence of instrument accessories.....................................................................................18

2. CONTROLLING OF THE INSTRUMENT..............................................................................21

2.1. Control keys .......................................................................................................................21

2.2. Input and output connectors of the instrument.....................................................................21

2.3. Default instrument settings .................................................................................................23

2.4. Preparation of the instrument to operation...........................................................................23

3. OPERATION............................................................................................................................24

3.1. Instrument data plate ..........................................................................................................24

3.2. SETUP menu......................................................................................................................24

3.3. RESULTS menu.................................................................................................................26

3.3.1. SLM mode ...................................................................................................................26

3.3.2. 1/1-octave analyzer ......................................................................................................28

3.3.3. 1/3-octave analyzer mode.............................................................................................29

3.3.4. Infra G filter mode .......................................................................................................29

3.4. SETUP TIME menu ...........................................................................................................30

3.5. FILTER menu ....................................................................................................................31

3.6. MEMORY menu ................................................................................................................31

3.6.1. Save measure ...............................................................................................................32

3.6.2. Load measure...............................................................................................................32

3.6.3. Measurement history....................................................................................................33

3.6.4. FREE/OCCUPIED menu .............................................................................................36

3.7. CLEAR menu.....................................................................................................................36

3.7.1. Measure in memory .....................................................................................................36

3.7.2. Measurement history....................................................................................................37

3.7.3. Entire memory .............................................................................................................37

4. COMMUNICATION WITH COMPUTER...............................................................................37

5. RECOMENDATIONS FOR INSTRUMENT USE ...................................................................38

5.1. Recommendations for correct performing of measurements................................................38

5.2. Internal battery ...................................................................................................................38

5.3. Calibration of the instrument ..............................................................................................38

5.4. Warranty ............................................................................................................................39

5.4.1. Complaint instructions for the purchaser: .....................................................................39

5.5. Maintenance and repair.......................................................................................................40

6. CE MARKING AND CONFORMANCE TO EU COUNCIL DIRECTIVES............................40

Appendix A. Filter characteristics................................................................................................41

Appendix B. Directional responses..............................................................................................45

Appendix C. Sensitivity to vibration............................................................................................48

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.

Fig. 1.1. DSA-50 digital sound analyzer – general view.

1.1. Accessories

Basic accessories:

• Model 5014 external power supply (Mascot).

• Instruction Manual.

• Declaration of Conformity.

• Warranty Card.

• Certificate of Verification.

• OP 60/2 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).

• 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

Fig. 1.2. Assembling of weatherproof accessories – step 1.

Fig. 1.3. Assembling of weatherproof accessories – step 2.

Fig. 1.4. Assembling of weatherproof accessories – step 3.

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.

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-average (equivalent continuous) sound level,

• LXeq1s time-average sound level for last one second.

If A frequency weighting is one of two selected weightings, then following quantities are

measured additionally for this weighting:

• LAE sound exposure level,

• LAEX,T noise exposure level referred to specified exposure time T.

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,

• LS current RMS, S-time-weighted sound level,

• Leq time-average sound level.

If A frequency weighting is selected, then following quantities are measured additionally:

• LASmx maximum RMS, A-frequency-weighted, S-time-weighted sound level,

• LAeq time-average A-frequency-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,

• Leq time-average sound level.

1.4.4. Infra G filter mode

Following quantities can be measured simultaneously:

• LGS current RMS, G-frequency-weighted S-time-weighted sound level,

• LGSmn minimum RMS, G-frequency-weighted S-time-weighted sound level,

• LGSmx maximum RMS, G-frequency-weighted S-time-weighted sound level,

• LIPk current peak sound level in infrasound band,

• LIMPk maximum peak sound level in infrasound band,

• LGeq G-frequency-weighted time-average 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.

Specifications common for all operating modes:

• Accuracy class 1

• Readout resolution 0.1dB

• Maximum sound pressure level can be applied

without causing damage to the instrument 150dB (3% THD)

• Maximum electrical voltage can be applied at

instrument electrical input facility without causing

damage to the instrument 22Vp-p

• Capacitance of electrical input facility 18pF

• Reference conditions:

- type of sound field free field

- reference frequency 1000Hz

- reference sound pressure level 94dB

- reference level range:

 for SLM mode 55 – 135dB

 for 1/1- and 1/3-octave analyzer mode 65 – 135dB

 for infra G filter mode 65 – 145dB

- sampling frequency:

 for SLM, 1/1- octave and 1/3-octave mode 52.1kHz

 for infra G filter mode 17.4kHz

- Microphone reference direction microphone symmetry axis

- microphone reference point microphone diaphragm centre

- reference orientation sound wave arriving from reference

direction

- reference temperature +23°C

- reference humidity 50% RH

- reference static pressure 101.325kPa

• Permissible error for sinusoidal reference signal

(progressive sound wave incident perpendicularly

to microphone diaphragm, 94dB, 1000Hz) ≤±0.7dB

• Operating temperature range -10 ÷+50°C

• Storage temperature range -10 ÷+50 °C

• Operating humidity range ≤90% RH (no condensation)

• Operating static pressure range 65 ÷108kPa

• Electromagnetic emission within the limits specified in

EN 61672-1:2002 (maximum

emission when operating with

external power supply)

• Warm-up time:

- after turn-on 1 minute

- after environmental conditions change 15 minutes

• Measurement duration 99h 59m 58s (set with 1s resolution)

or infinite

• Serial communication interface USB 1.1

• Dimensions (without microphone) 237 x 84 x 50 mm

• Power supply

- internal battery NiMH 6V 2.1Ah

- external power supply Mascot 5014 (9V, 350mA)

• Minimum operating voltage of internal battery 5.5V

• Continuous operating time (battery fully charged,

microphone heating turned off) 24h

• Weight 600g

• Nominal corrections for effects of reflection

from instrument case (free field, 0° incidence) See table below

f [Hz]

250 315 400 500 630 800 1000 1250 1600 2000 2240

dL [dB]

0,23 -0,22 0,41 -0,08 -0,30 -0,29 -0,30 0,30 -0,17 -0,44 -0,11

U [dB]

≤0,03 ≤0,05

f [Hz]

2500 2800 3150 3550 4000 4500 5000 5600 6300 7100 8000

dL [dB]

-0,09 0,12 -0,17 -0,51 0,04 0,00 -0,44 -0,29

0,19 0,16 0,51

U [dB]

≤0,05

f [Hz]

8500 9000 9500 10000

10600

11200

11800

12500

13200

14000

15000

dL [dB]

-0,33 0,25 -0,33 -0,52 0,08 -0,18 -0,05 0,19 -0,12 -0,43 -0,53

U [dB]

≤0,05 ≤0,09

f [Hz]

16000

17000

18000

19000

20000

dL [dB]

0,03 0,63 0,60 -0,97 -1,50

U [dB]

≤0,09

• Differences between WK-21 microphone free field

frequency response at 0° incidence and electrostatic

actuator response; expanded (k=2) uncertainty of

the determination of these differences See table below and Fig. 1.7

f [Hz]

250 315 400 500 630 800 1000 1250 1600 2000 2240

dL [dB]

0,00 0,02 0,03 0,04 0,05 0,08 0,11 0,18 0,26 0,36 0,43

U [dB]

≤0,29

f [Hz]

2500 2800 3150 3550 4000 4500 5000 5600 6300 7100 8000

dL [dB]

0,52 0,62 0,74 0,93 1,13 1,42 1,70 2,08 2,50 2,89 3,30

U [dB]

≤0,29 ≤0,39

f [Hz]

8500 9000 9500 10000

10600

11200

11800

12500

13200

14000

15000

dL [dB]

3,49 3,69 3,90 4,18 4,49 4,82 5,19 5,72 6,34 6,83 7,31

U [dB]

≤0,39 ≤0,48

f [Hz]

16000

17000

18000

19000

20000

dL [dB]

7,67 8,09 8,47 8,77 9,12

U [dB]

≤0,48

0,00

1,00

2,00

3,00

4,00

5,00

6,00

7,00

8,00

9,00

10,00

100 1000 10000 100000

f[Hz]

dL[dB]

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.

f [Hz]

250 315 400 500 630 800 1000 1250 1600 2000 2240

dL [dB]

0,00 -0,07 -0,02 0,00 0,02 -0,05 0,02 -0,01 -0,08 0,04 -0,02

U [dB]

≤0,21

f [Hz]

2500 2800 3150 3550 4000 4500 5000 5600 6300 7100 8000

dL [dB]

0,07 0,06 -0,15 0,06 -0,13 0,11 -0,05 -0,05 0,20 0,31 0,38

U [dB]

≤0,21 ≤0,34

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