SONOPAN DLM-102 User manual

April 2019

DLM-102

CLASS II

SOUND LEVEL METER

Instruction manual

This manual describes operation of the DLM-101 meter with firmware version

1. .0021. The firmware version number can be viewed on the welcome screen

which is displayed after turning on the meter (the exact description can be found

in section Błąd! Nie można odnaleźć źródła odsyłacza. of this manual).

PPUH SONOPAN Sp. z o.o.

ul. Ciołkowskiego 2/2 15-950 Białystok Poland

phone +48 85 742 36 62

sonopan@sonopan.com.pl

https://www.sonopan.com.pl/

TABLE OF CONTENTS

1. INSTRUMENT CHARAKTERISTRICS..............................................................................................................3

1.1. Accessories.................................................................................................................................................4

1.2. System configuration ..............................................................................................................................4

1.3. Measured quantities................................................................................................................................4

1.4. Specifications ............................................................................................................................................4

1.5. Influence of operating environment...................................................................................................8

1.6. Influence of instrument accessories....................................................................................................8

2. CONTROLLING OF THE INSTRUMENT ........................................................................................................9

2.1. Control keys...............................................................................................................................................9

2.2. Input and output connectors of the instrument ..............................................................................9

2.3. Default instrument settings............................................................................................................... 11

2.4. Preparation of the instrument to operation.................................................................................. 11

3. OPERATION.................................................................................................................................................... 11

3.1. Instrument data plate .......................................................................................................................... 12

3.2. Results...................................................................................................................................................... 13

3.3. Date and time......................................................................................................................................... 14

3.4. Measures memory................................................................................................................................. 14

3.5. Time history memory............................................................................................................................ 15

3.6. Calibration............................................................................................................................................... 16

4. RECOMENDATIONS FOR INSTRUMENT USE ......................................................................................... 17

4.1. Recommendations for correct performing of measurements................................................... 17

4.2. Internal battery...................................................................................................................................... 18

4.3. Calibration of the instrument ............................................................................................................ 18

4.4. Warranty.................................................................................................................................................. 19

4.4.1. Complaint instructions for the purchaser: .............................................................................. 19

4.5. Maintenance and repair....................................................................................................................... 19

4.6. Firmware.................................................................................................................................................. 19

5. CE MARKING AND CONFORMANCE TO EU COUNCIL DIRECTIVES.................................................. 20

Appendix A. Filter characteristics............................................................................................................... 21

Appendix B. Directional characteristics .................................................................................................... 22

1. INSTRUMENT CHARAKTERISTRICS

DLM-102 is fully digital single range integrating sound level meter with type 1 accuracy. Easy

operation wide range and small dimensions allow measurements of noise in many areas. This

meter is ideal for company health and safety inspector or building inspector controlling building

work. The low price enables use of meter where until now the noise was not evaluated because

of high cost of measuring instruments.

Internal Li-ION battery provides long-term measurements on single charging and easy to read

backlit display allows comfort use in tight dark places.

The large internal memory allows the use of the DLM-102 meter in environmental noise

monitoring and the ability to record the measurement history log with 100ms interval enables

its use also in the assessment of aircraft noise.

microphone

connector

charger

connector

LED to signal charger

attaching

RS-232 connector

USB connector

Fig. 1.1. DLM-102 sound level meter – general view.

PN-EN 61672-1:2005

PLT1113

DLM-102

Nr.

Klasa 2

Fig. 1.2. DLM-102 sound level meter – data plate.

1.1. Accessories

Basic accessories:

• Charger 6WZS 12/400 (Tatarek).

• OP60/4 microphone windscreen.

• RS-232 cable (DB9F-RJ10) 1.8m.

• USB cable (USBA-USBB mini) 1.8m.

• Carrying case.

• Instruction manual.

• Declaration of Conformity.

• Warranty Card.

Additional accessories:

• KA-10 type 2 acoustic calibrator.

• Supporting stand for the instrument SMR (1 5m height).

1.2. System configuration

Basic configuration:

• DLM-102 sound level meter (Sonopan).

• MK-401 ¼” measurement microphone (Sonopan).

• OP60/4 microphone windscreen.

Other accessories specified in section 1.1 are optional.

1.3. Measured quantities

Sound level meter allows simultaneous measurement:

• with A or C frequency weighting:

- current RMS sound level (with SLOW or FAST time weighting) e.g. LAF

- minimum RMS sound level (with SLOW or FAST time weighting) e.g. LAFmn

- maximum RMS sound level (with SLOW or FAST time weighting) e.g. LAFmx

- time-average (equivalent continuous) sound level e.g. LAeq.

- sound exposure level e.g. LAE.

• with C frequency weighting:

- current peak sound level LCPk

- maximum peak sound level LCMPk

• measurement time.

1.4. Specifications

Instrument meets the requirements of following standards:

 EN 61672-1:2014 Electroacoustics. Sound level meters. Part 1:

Specifications.

Meter belongs to the group X as defined in EN 61672-1:2003.

Specification (for microphone sensitivity 12.5mV/Pa):

• Accuracy class 2

• Frequency weightings A C

• Time weightings SLOW FAST

• Readout resolution:

- measure 0.1dB

- calibration 0.01dB

• Maximum value of sound pressure

causing no damage to the meter 150dB

• Maximum unweighted sound pressure level

causing no activating of overload indicator 137.9dB

• Maximum electrical signal value causing no

damage to the instrument (applied using electrical

input facility) 5.34Vp-p

• The way of insert electrical signals into the meter

input directly from the generator with

internal impedance ≤ 600Ω

• Reference conditions

- type of sound field free

- reference frequency 1000Hz

- reference sound pressure level 94dB

- reference level range 40 - 135dB

- sampling frequency 41.7kHz

- 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%

- reference static pressure 101.325kPa

• Starting point at which to begin tests of level

linearity deviation on the reference level range reference sound pressure level

• Permissible error for sinusoidal reference signal

(progressive sound wave incident perpendicularly

to microphone diaphragm 94dB 1000Hz) ≤ ±1.0dB

• Total range for LA sound level and LAeq

time-average sound level) 40 – 135dBA

• Measuring ranges at specified frequencies for sound level (L) and time-average sound

level (Leq)

31.5Hz 1kHz 4kHz 8kHz

40-98dBA 40-135dBA 40-137dBA 40-135dBA

C 45-135dBC 45-135dBC 45-135dBC 45-135dBC

• Total range for LCPk peak sound level 50 – 138dBC

• Self-generated noise

without microphone with MK-401 microphone

≤19dB ≤35dB

C ≤20dB ≤43dB

• Measurement duration with 1s resolution 999 hours 59 minutes 59 seconds

• Warm-up time

- after turn-on 1 minute

- after environmental conditions change 15 minutes

• Power supply

- internal battery Li-ION 7.2V 700mAh

- charger 6WZS 12/400 (Tatarek)

• Minimum operating voltage of internal battery 6.6V

• Operating temperature range 0 ÷ +40°C

• Storage temperature range -10 ÷ +50 °C

• Operating humidity range ≤ 90% (without condensation)

• Operating static pressure range 65 ÷ 108kPa

• Electromagnetic emission within the limits specified in

EN 61672-1:2002 (maximum

emission when operating with

charger)

• Dimensions (without microphone) 194 x 81 x 30 mm

• Continuous operating time (battery fully charged) 16h

• Weight 400g

• 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]

0.01 0.05 0.11 0.12 0.40 0.17 0.01 -0.22 -0.23 -0.01 0.22

U [dB]

≤ 0.10

f [Hz]

2500 2800 3150 3550 4000 4500 5000 5600 6300 7100 8000

dL [dB]

0.24 -0.53 0.27 0.23 -0.34 0.31 0.18 -0.47 0.37 0.03 -0.02

U [dB]

≤ 0.12

f [Hz]

8500 9000 9500 10000

10600

11200

11800

12500

13200

14000

15000

dL [dB]

0.00 -0.33 -0.29 0.28 0.39 -0.27 0.01 -0.41 0.37 -0.18 0.26

U [dB]

≤ 0.12 ≤ 0.17

f [Hz]

16000

17000

18000

19000

20000

dL [dB]

0.38 -0.30 -0.30 -0.08 -0.26

U [dB]

≤ 0.17

• Differences between MK-401 microphone free

field frequency response at 0° incidence and

multi-frequency acoustic calibrator response;

expanded (k=2) uncertainty of the determination

of these differences: See table below and Fig. 1.3.

f [Hz]

250 315 400 500 630 800 1000 1250 1600 2000 2240

dL [dB]

0.00 0.01 0.03 0.04 0.00 0.07 0.07 0.12 0.09 -0.03 0.06

U [dB]

≤ 0.25

f [Hz]

2500 2800 3150 3550 4000 4500 5000 5600 6300 7100 8000

dL [dB]

-0.02 -0.06 -0.03 0.09 0.15 0.18 0.18 0.35 0.41 0.54 0.36

U [dB]

≤ 0.25 ≤ 0.45

f [Hz]

8500 9000 9500 10000

10600

11200

11800

12500

13200

14000

15000

dL [dB]

0.67 0.79 0.81 0.76 0.78 0.95 1.37 1.73 1.61 1.84 2.56

U [dB]

≤ 0.45 ≤ 0.58

f [Hz]

16000

17000

18000

19000

20000

dL [dB]

2.78 3.12 3.54 4.08 4.10

U [dB]

≤ 0.58

-1,0

0,0

1,0

2,0

3,0

4,0

5,0

100 1000 10000 100000

Fig. 1.3. Free-field correction for MK-401 microphone (0° incidence).

Table below and Fig. 1.4 show typical free-field frequency response of MK-401 microphone.

f [Hz]

250 315 400 500 630 800 1000 1250 1600 2000 2240

dL [dB]

0.00 -0.01 -0.01 0.00 -0.03 -0.02 -0.05 -0.02 -0.02 -0.14 -0.02

U [dB]

≤ 0.23

f [Hz]

2500 2800 3150 3550 4000 4500 5000 5600 6300 7100 8000

dL [dB]

-0.03 0.00 0.08 0.21 0.28 0.33 0.41 0.65 0.77 0.93 0.88

U [dB]

≤ 0.23 ≤ 0.43

f [Hz]

8500 9000 9500 10000

10600

11200

11800

12500

13200

14000

15000

dL [dB]

1.17 1.33 1.40 1.43 1.20 1.32 1.72 2.05 1.78 1.87 2.37

U [dB]

≤ 0.43 ≤ 0.52

f [Hz]

16000

17000

18000

19000

20000

dL [dB]

2.37 2.32 2.36 2.54 2.28

U [dB]

≤ 0.52

-3,0

-2,0

-1,0

0,0

1,0

2,0

3,0

100 1000 10000 100000

Fig. 1.4. Typical free-field frequency response of MK-401 microphone

1.5. Influence of operating environment

• Influence of static pressure -0.009dB/kPa (for 1kHz)

• Influence of temperature ≤ ±0.7dB (for 1kHz)

• Influence of humidity ≤ ±0.1dB (without condensation)

• Influence of electromagnetic field conformable to EN 61672-1:2003

specifications (maximum when

meter is parallel to field direction)

• Influence of electrostatic field conformable to EN 61672-1:2003

• Influence of a.c. power-frequency (reading in 80 A/m field intensity)

- at A frequency weighting not detectable

- at C frequency weighting not detectable

1.6. Influence of instrument accessories

Installation of additional equipment does not deteriorate accuracy class of the instrument

however some influence of this equipment on entire instrument performance can be detected:

• Influence of windscreen (at 0° incidence) See table below and Fig. 1.5.

f [Hz]

250 315 400 500 630 800 1000 1250 1600 2000 2240

dL [dB]

0.07 0.12 0.13 0.12 0.16 0.27 0.24 0.34 0.47 0.45 0.53

U [dB]

≤ 0.08 ≤ 0.10

f [Hz]

2500 2800 3150 3550 4000 4500 5000 5600 6300 7100 8000

dL [dB]

0.47 0.49 0.50 0.49 0.21 0.18 -0.08 -0.15 -0.25 0.34 -0.35

U [dB]

≤ 0.10

f [Hz]

8500 9000 9500 10000

10600

11200

11800

12500

13200

14000

15000

dL [dB]

-0.06 -0.37 -0.54 -0.40 -0.84 -0.32 -0.98 -0.69 -2.09 -1.56 -1.74

U [dB]

≤ 0.10 ≤ 0.11

f [Hz]

16000

17000

18000

19000

20000

dL [dB]

-2.90 -2.98 -2.89 -3.46 -3.48

U [dB]

≤ 0.11

-4,0

-3,5

-3,0

-2,5

-2,0

-1,5

-1,0

-0,5

0,0

0,5

1,0

100 1000 10000 100000

f[Hz]

dL[dB]

Fig. 1.5. Influence of OP60/4 windscreen.

2. CONTROLLING OF THE INSTRUMENT

DLM-102 sound level meter can be controlled by instrument keyboard.

2.1. Control keys

Instrument keyboard contains following keys:

• power switch:

• keys used to select the instrument settings (they also serve as cursors):

• keys used to control memory and calibration:

• keys: START/STOP of measurement and ENTER

2.2. Input and output connectors of the instrument

Instrument is equipped with:

• Microphone connector FISHER DB102A054-130.

Fig. 2.1. Microphone connector external view.

Pin no. Signal

1 +13V

2 not connected

3 GND

4 not connected

5 signal input

screen case ground

• RS-232 connector Amphenol AMP-215875-1 to data transmission with PC.

Fig. 2.2. RS-232 connector – external view.

Pin no. Signal

1 GND

2 TxD

3 GND

4 RxD

• USB mini B connector Wurth Electronics 65100516121 to data transmission with PC.

Fig. 2.3. USB mini B connector – external view.

Pin no. Signal

1 VBUS

2 D-

3 D+

4 not connected

5 GND

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