RS PRO SLM 1353M Bedienungsanleitung

INSTRUCTION MANUAL

SLM 1353M

Integrating Sound Level Meter

FREN IT DE ES

INTEG

DATE

TIME

A/C

ERASE

Leq SEL SPL

RECORD

MAX

Integrating Sound Level Meter / EN

08/15/16 Version No. 01

CONTENTS

Title Page

1. INSTRUMENT CARE.....................................................................................1

2. FEATURES.....................................................................................................2

3. MEASUREMENT PARAMETERS..................................................................3

4. SPECIFICATIONS..........................................................................................4

5. CONTROLS AND FUNCTIONS...................................................................11

6. LCD DISPLAY DESCRIPTION.....................................................................14

7. PREPARATION FOR USE ...........................................................................16

8. CALIBRATION PROCEDURE .....................................................................18

9. MEASUREMENT PROCEDURE..................................................................19

10. SETTING THE CURRENT TIME AND DATE.............................................22

11. STORE RECORD DATA OPERATION.......................................................23

12. OUTPUT CONNECTORS...........................................................................28

13. ADJUSTMENT DATA FOR CALIBRATOR (B&K TYPE 4226 PRESSURE

MODE)........................................................................................................29

14. TYPICAL INSTRUMENT FREQUENCY RESPONSE AT 0°

INCIDENCE.30

15. TYPICAL FREQUENCY RESPONSE DUE TO CASE REFLECTIONS AT 0°

INCIDENCE................................................................................................31

16. TYPICAL FREQUENCY RESPONSE FOR INSTRUMENT FITTED WITH

WINDSCREEN AT 0°

INCIDENCE.............................................................32

17. DIRECTIONAL CHARACTERISTICS OF THE COMPLETE INSTRUMENT

....................................................................................................................33

18. APPENDIX A FREQUENCY WEIGHTING NETWORK.............................36

19. APPENDIX B RMS DETECTION CIRCUIT AND TIME WEIGHTING.......37

20. APPENDIX C INFLUENCE OF BACKGROUND NOISE...........................39

Integrating Sound Level Meter / EN

1 08/15/16 Version No. 01

1. INSTRUMENT CARE

Do not attempt to remove the mesh cover from the microphone as this will cause

damage and affect the accuracy of the instrument.

Protect the instrument from impact. Do not drop it or subject it to rough handling.

Transport it in the supplied carrying case.

Protect the instrument from water, dust, extreme temperatures, high humidity and

direct sunlight during storage and use.

Protect the instrument from air with high salt or sulphur content, gases and stored

chemicals, as this may damage the delicate microphone and sensitive electronics.

Always turn the instrument off after use. Remove the batteries from the instrument

if it is not to be used for a long time. Do not leave exhausted batteries in the

instrument, as they may leak and cause damage.

Clean the instrument only by wiping it with a soft, dry cloth or, when necessary, with

a cloth lightly moistened with water. Do not use any solvents, alcohol or cleaning

agents.

Integrating Sound Level Meter / EN

08/15/16 Version No. 01 2

2. FEATURES

The SLM 1353M Sound Level Meter complies with the requirements of

IEC 61672-1: 2003 standard for a Class 2 instrument.

The instrument contains several features which permit sound level measurements

under a variety of conditions.

Features include:

Ease of use.

Easy to read large display.

Five measurement ranges.

Fast, Slow and Impulse time weightings.

A and C frequency weightings.

Storage of up to 32000 measurement records.

USB serial port for downloading records to a computer or real time analysis to a

computer.

Both AC and DC signal outputs are available from a single standard 3.5mm

coaxial socket suitable for use with a frequency analyzer, level recorder, FFT

analyzer, graphic recorder, etc.

Leq, SEL, SPL MAX, SPLMIN, PH (Peak Hold), L05, L10, L50, L90, and L95, ten

measured parameters are monitored during measurement and can be viewed

selectively by pressing the button.

Preset measurement time up to 24 hours.

Sound level alarm output connector.

Integrating Sound Level Meter / EN

3 08/15/16 Version No. 01

3. MEASUREMENT PARAMETERS

The following parameters are used on the instrument.

A →“A” frequency weighting sound pressure level

C →“C” frequency weighting sound pressure level

FAST →Fast time weighting

SLOW →Slow time weighting

IMP →Impulse time weighting

SPL →Current time-weighted sound pressure level

Leq →Equivalent continuous sound level

SEL →Sound exposure level

SPL MAX →Maximum sound pressure level

SPL MIN →Minimum sound pressure level

PH →Peak Hold sound pressure level

L:05 →5% percentile sound level

L:10 →10% percentile sound level

L:50 →50% percentile sound level

L:90 →90% percentile sound level

L:95 →95% percentile sound level

SPL“MAX” →Maximum time-weighted sound pressure level (MAX symbol blink)

The various settings depend on the condition the instrument was in before it was last

turned off.

Integrating Sound Level Meter / EN

08/15/16 Version No. 01 4

4. SPECIFICATIONS

Specifications apply to Model SLM 1353M fitted with Microphone model MC-22 and

Microphone Preamplifier model AP-21

Applicable standards: IEC61672-1: 2003 Class 2

IEC60651: 1979 Type 2

ANSI S1.4: 1983 Type 2

IEC60804: 1985 Type 2

Measurement functions:

•

Main processing functions

Sound level: Current time-weighted sound pressure level Aor current

time-weighted sound pressure level C

Maximum time-weighted sound pressure level A or Maximum time-weighted

sound pressure level C

Equivalent continuous sound level Leq A or Leq C

Sound exposure level SEL A or SEL C

Peak Hold sound level PHA or PHC

Percentile sound level L : 05 Aor L : 05 C

L : 10 A or L : 10 C

L : 50 A or L : 50 C

L : 90 A or L : 90 C

L : 95 A or L : 95 C

•

Measurement time : 1second to 24 hours

•

Measuring ranges

RMS : Total range: 30 to 130dB

Peak Hold : A– weighted or C – weighted over the top 30dB of each

measurement range.

30 – 90 : 63 – 93dB Peak Hold

40 – 100 : 73 – 103dB Peak Hold

50 – 110 : 83 – 113dB Peak Hold

60 – 120 : 93 – 123dB Peak Hold

70 – 130 : 103 – 133dB Peak Hold

•

Max. measurement level: 130dB

•

Self-generated noise level:

Typical values at 23°C using the nominal microphone equivalent capacitance of 27pF

(30-90dB range)

Weighting Electrical Total

“A” 22.7dB 26.1dB

“C” 21.8dB 29.5dB

Integrating Sound Level Meter / EN

5 08/15/16 Version No. 01

Linearity operating range: A-weighted, 1000Hz, 60dB dynamic range.

Total linear operating range:

In accordance with IEC 61672-1,A-weighted, 1000Hz: 30dB to 130dB.

Level range selection:

5 ranges in 10dB steps 30 to 90dB , 40 to 100dB

50 to 110dB , 60 to 120dB

70 to 130dB

LINEAR OPERATING RANGES (L.O.R.)

RANGE: 30 – 90 dB. Test starting point 64 dB for all weightings and frequencies except

31.5Hz A-weighted, for which the starting point is 44 dB.

FREQUENCY

Hz WEIGHTING

L.O.R.

dB WEIGHTING L.O.R.

31.5 A 36.1 – 50.6 C 39.5 – 87.0

1000 A 36.1– 90.0 C 39.5 – 90.0

4000 A 36.1 – 90.0 C 39.5 – 89.2

8000 A 36.1 – 88.9 C 39.5 – 87.0

RANGE: 40 – 100 dB. Test starting point 74 dB for all weightings and frequencies except

31.5Hz A-weighted, for which the starting point is 54 dB.

FREQUENCY

Hz WEIGHTING L.O.R.

dB WEIGHTING L.O.R

31.5 A 40.0 – 60.6 C 40.0 – 97.0

1000 A 40.0 – 100.0

C 40.0 – 100.0

4000 A 40.0 – 100.0

C 40.0 – 99.2

8000 A 40.0 – 98.9 C 40.0 – 97.0

RANGE: 50 – 110 dB. Test starting point 84 dB for all weightings and frequencies except

31.5Hz A-weighted, for which the starting point is 64 dB.

FREQUENCY

Hz WEIGHTING

L.O.R

dB WEIGHTING L.O.R

31.5 A 50.0 – 70.6 C 50.0 – 107.0

1000 A 50.0 – 110.0 C 50.0 – 110.0

4000 A 50.0 – 110.0 C 50.0 – 109.2

8000 A 50.0 – 108.9

C 50.0 – 107.0

Integrating Sound Level Meter / EN

08/15/16 Version No. 01 6

RANGE: 60 – 120 dB. Test starting point 94 dB for all weightings and frequencies except

31.5Hz A-weighted, for which the starting point is 74 dB.

FREQUENCY

Hz WEIGHTING

L.O.R.

dB WEIGHTING

L.O.R.

31.5 A 60.0 – 80.6 C 60.0 – 117.0

1000 A 60.0 – 120.0 C 60.0 – 120.0

4000 A 60.0 – 120.0 C 60.0 – 119.2

8000 A 60.0 – 118.9 C 60.0 – 117.0

RANGE: 70 – 130 dB. Test starting point 104 dB for all weightings and frequencies

except 31.5Hz A-weighted, for which the starting point is 84 dB.

FREQUENCY

Hz WEIGHTING

L.O.R.

dB WEIGHTING L.O.R.

31.5 A 70.0 – 90.6 C 70.0 – 127.0

1000 A 70.0 – 130.0

C 70.0 – 130.0

4000 A 70.0 – 130.0

C 70.0 – 129.2

8000 A 70.0 – 128.9

C 70.0 – 127.0

Frequency range:

Overall characteristics including microphone: 31.5 to 8000Hz

Frequency weighting: A,meets the requirement of IEC 61672-1 for class 2

“A” weighting.

C,meets the requirement of IEC 61672-1 for class 2

“C” weighting.

Time weighting (RMS detection): Fast, according to IEC 61672-1 class 2.

Slow, according to IEC 61672-1 class 2.

Impulse, according to IEC 61672-1 class 2.

•

Reference conditions:

Type of the acoustic field: Free

Reference sound pressure level: 94.0dB (related to 20µPa)

Reference level range: 60 to 120dB

Reference frequency: 1000Hz

Reference temperature: +23°C

Reference relative humidity: 50%RH

Reference static pressure: 101.325 kPa

Reference incidence direction: Perpendicular to the front of the microphone

diaphragm.

•

Calibration: Acoustic using calibrator SLC 1356, B&K 4231 or equivalent.

Calibration check frequency is 1000Hz.

Nominal calibration level for the free field: 94.1dB

Nominal calibration level for the diffuse field:94.0dB

Integrating Sound Level Meter / EN

7 08/15/16 Version No. 01

•

Frequency for acoustic testing: 8000Hz.

•

Warm-up time:

≦

2min

•

Sampling interval: Bar graph indication →125 ms approx.

Numeric indication →1 sec approx.

•

Data record capacity: Data can be stored in the memory.

Max. 32000 data can be stored.

Max. 255 blocks can be split.

•

Microphone equivalent electrical impedance (electrical input device) : Replace

the microphone capsule with a series capacitance of 27pF +/- 3pF



Microphone:

•

Model: MC-22

•

Nominal diameter: 1/2 inch electret condenser type

•

Sensitivity: -27dB (0dB = 1V/Pa)

•

Frequency response: 31.5Hz to 8000Hz

•

Capacitance: 27pF

•

Reference direction and position: Perpendicular to the front of the microphone

diaphragm at its geometric centre.

•

Maximum input sound level: 131dB at microphone for no damage.

•

Operating temperature: -10°C to +50°C

•

Temperature coefficient: Approx. 0.005dB/°C at 1000Hz

•

Dimensions: 13.2dia x 14mm

Frequency Response

-5.0

0.0

5.0

31.5Hz 63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz

(dB)

Freq

units

31.5

Hz 63

Hz 125

Hz 250

Hz 500

Hz 1000

Hz 2000

Hz 4000

Hz 8000

dB +0.4

+0.3

+0.2

+0.1

0.0 +0.1

+0.3

+0.8

-0.5

Typical free-field response 0°incidence

Integrating Sound Level Meter / EN

08/15/16 Version No. 01 8

-20.0

-10.0

0.0

10.0

20.0

31.5Hz 63Hz 125Hz 250Hz 500Hz 1000Hz 2000Hz 4000Hz 8000Hz

(dB)

Freq

units

31.5

Hz 63

Hz 125

Hz 250

Hz 500

Hz 1000

Hz 2000

Hz 4000

Hz 8000

dB +1.2

+0.7

+0.4

+0.2

0.0 0.0 0.0 +0.1

-3.7

Typical diffuse-field response for random incidence



Preamplifier:

•

Model: AP-21

•

Input impedance: 470MΩ

•

Output impedance: 550Ωat 1000Hz

•

Maximum input voltage: 2.828V peak-to-peak at electrical input for no damage.

•

Measuring input (viewed from top of instrument):

A: ground

B: ground

C: +10V

D: signal input

E: N.C.



Display LCD

•

Display screens:

4 digit numerical indication of sound level, from 30.0 to 130.0dB with 0.1dB

resolution.

Bar-graph indication of current sound level with 1dB resolution.

Sound level range indicator: 30–90dB, 40–100dB, 50–110dB, 60–120dB or

70–130dB in five ranges.

Time display; year – month – day and hour: minute: second.

•

Display update rate: 1 second

•

Display first indication: Depends on the condition the instrument when it was last

turned off.

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