Lutron Electronics SL-4022 Bedienungsanleitung

IEC 61672, class 1

SOUND LEVEL METER

Model : SL-4022

Your purchase of this

SOUND LEVEL METE

marks a step forward for

you into the field of

precision measurement.

Althou

h this METER is a

complex and delicate

instrument, its durable

structure will allow many

years of use if proper

operatin

techniques are

developed. Please read

the followin

instructions

carefully and always keep

this manual within easy

reach.

OPERATION MANUAL

TABLE OF CONTENTS

1. FEATURES...........................................................

2. SPECIFICATIONS..................................................1

3. FRONT PANEL DESCRIPTION................................

3-1 Electric condenser microphone.......................

3-2 Display.........................................................

3-3 Time Weighting ( Fast/Slow ) selector.............4

3-4 Max. hold & Instant display selector................4

3-5 Calibration VR (Accuracy adjust VR)................4

3-6 Reset button for Max. hold function................ 4

3-7 A/C weighting selector................................... 4

3-8 Signal output terminal....................................4

3-9 Range selector..............................................

3-10 Power off/On/Internal calibration selector.......4

3-11 Battery Compartment/Cover.......................... 4

3-12 Range upper/lower indicator..........................4

3-13 Microphone change installation

4. MEASURING PROCEDURE.....................................

5. MEASURING CONSIDERATION..............................

6. SIGNAL OUTPUT..................................................

7. REPLACEMENT OF BATTERY.................................

8. CALIBRATION .....................................................

9. FREQUENCY WEIGHTING CHARACTERISTICS

OF A & C NETWORKS...........................................

10.TIME WEIGHTING ( FAST & SLOW )

CHARACTERISTICS...............................................10

1. FEATURES

* Large LCD display, easy to read.

* Frequency weighting networks ( A & C weighting ) &

Time weighting ( Fast/Slow ) are designed to meet the

IEC 61672 Class 1.

* AC output for system expansion.

* Build in CALIBRATION VR on front panel.

* Changeable condenser microphone for high accuracy &

long-term stability.

* Max. Hold function for stored the maximum value on

display.

* Build max. hold reset switch.

* Warning indicator for over and under load.

* LCD display for low power consumption & clear

read-out even in bright ambient light condition.

* Used the durable, long-lasting components, including

a strong, light weight ABS-plastic housing case.

* Low battery indicator.

2. SPECIFICATIONS

Display 18 mm (0.7") LCD (Liquid Crystal Display),

3 1/2 digits.

Function dB (A & C frequency weighting),

Time weighting ( Fast, Slow),

Max. hold, AC output.

Measurement

3 ranges :

Range 30 - 70 dB, 60 - 100 dB, 90 - 130 dB

Resolution 0.1 dB.

Accuracy Frequency weighting ( 31.5 Hz to 16 KHz )

(23± 5 )℃

meet IEC 61672 Class 1, calibrating input

signal on 94 dB, then the accuracy of A/C

weighting is specified as following :

31.5 Hz - ± 2.0 dB, 63 Hz - ± 1.5 dB,

125 Hz - ± 1.5 dB 250 Hz - ± 1.4 dB,

500 Hz - ± 1.4 dB, 1 KHz - ± 1.1 dB

2 KHz - ± 1.6 dB, 4 KHz - ± 1.6 dB,

8 KHz - + 2.1 dB to -3.1 dB,

12.5 KHz - + 3.0 dB to -6.0 dB,

16 KHz - + 3.5 dB to -17.0 dB.

Characteristics of A & C.

A weighting :

The characteristic is simulated as "Human

Frequency Ear Listing" response. Typical, if making

Weighting the environmental sound level measurement,

Network always select to A weighting.

C weighting

The characteristic is near the "FLAT"

response. Typical, it is suitable for

checking the noise of machinery (Q.C.

check) & knowing the sound pressure level of

the tested equipment.

Frequency 31.5 Hz to 16.0 KHz.

Calibrator B & K (Bruel & Kjaer) :

Multi-fuction acoustic calibrator,

model : 4226.

Microphone Electric condenser microphone.

Size of 0.5 inch standard size.

Microphone

Range 30 to 70 dB, 60 to 100 dB, 90 to 130 dB,

Selector 40 dB on each step, with over & under

range indicating.

Time Fast - t= 200 ms, Slow - t = 500 ms,

Weighting * "Fast" range is simulated the

(Fast & Slow) human ear response time.

* "Slow" range is easy to get the avg.

values of vibration sound level.

* The "Fast" & "Slow" response

range are designed to meet IEC 61672

Class 1 requirement.

Calibration * Build in external calibration VR on front

panel.

* Calibrated via external SOUND

CALIBRATOR.

* Calibrated via internal 94 dB/1 KHz

generator.

Output Signal AC output - AC 750 mVrms corresponding to

each range step.

Output 3.5 mm Dia. phone output terminal is

Terminal provided for connection with analyzer,

level recorder, tape recorder.

Operating 0 to 50 ( 32 to 122 ).℃℃℉ ℉

Temperature

Operating Less than 80% RH.

Humidity

Power Supply DC 9V battery x 2 PCs, 006P, MN1604 ( PP3 )

or equivalent, heavy duty or alkaline type.

Power Approx. DC 17 mA.

Consumption

Weight 450 g/0.99 LB .

Dimension 260 x 87 x 36 mm ( 10.2 x 3.4 x 1.4 inch).

Standard Instruction Manual ................. 1 PC.

Accessories Calibration screw driver........... 1 PC.

Hard carrying case ( CA-06 ).... 1 PC.

Optional 94 dB Sound Calibrator, model : SC-941.

Accessories 94/114 dB Sound Calibrator,

model : SC-942.

3. FRONT PANEL DESCRIPTION

Fig. 1

3-1 Electric condenser microphone

3-2 Display

3-3 Time Weighting ( Fast/Slow ) selector

3-4 Max. hold & Instant display selector

3-5 Calibration VR (Accuracy adjust VR)

3-6 Reset button for Max. hold function

3-7 A/C weighting selector

3-8 Signal output terminal

3-9 Range selector

3-10 Power off/On/Internal calibration selector

3-11 Battery Compartment/Cover

3-12 Range upper/lower indicator

3-13 Microphone change installation

4. MEASURING PROCEDURE

1)Slide the " Power off/On selector " ( 3-10, Fig 1 )

to the " On " position.

0 = Off, 1 = On

2)For the instant display reading, slide the " Max. hold

& Instant display selector " ( 3-4, Fig. 1 ) to the "

Instant " position. General application always select

the " Instant " function. For the " Max. hold " function,

please refer the 4-7, page 6.

3)Slide the A/C weighting selector ( 3-7, Fig. 1 ) to

"A" or "C" position for sound level measuring.

NOTE :

a. The characteristic table of A, C weighting,

please ref. page 9.

b. The characteristic of A weighting is simulated

as the "Human Ear Listening" response.

Typically, if making the environmental sound

level measurement, always select the A

weighting typically.

c. The C weighting characteristic is near the

"FLAT" response. Typically, it is suitable for

checking the noise of machinery (Q.C. check)

& knowing the real sound level of the tested

equipment.

4)Determine proper measuring range by selecting

the " Range selector " ( 3-9, Fig. 1 ) to minimize the

tolerance of readout. When left corner of LCD

show " " indicator, ( 3-12, Fig. 1 ), it shows the▲

dB range selection is upper or lower setting. Slide

range selector to other range for measuring.

5)According on various measuring sound source,

select the " Time weighting selector " ( 3-3, Fig. 1 )

to " F " or " S " position.

Typically select the " Time weighting selector " to

" F " position.

6)Hold the instrument in hand and point the

microphone at measured noise source, the sound

level will be displayed on "dB" ( decibel) unit.

7)Max. hold

During the sound level measurement, if intend to

hold the maximum ( peak ) value on display, slide

" Max. hold & Instant display selector " ( 3-4, Fig. 1 )

to the " Max. hold " position.

Note :

During the operation of " Max. hold function ",

push " Reset button for Max. hold function " ( 3-6,

Fig. 1 ) once a while will reset the max. peak value.

If not use the " Max. hold " function, it should

select the " Max. hold & Instant display selector "

( 3-4, Fig. 1 ) to the " Instant " position.

5. MEASURING CONSIDERATION

1)Please should select the proper weighting selector (A

weighting or C weighting). The A weighting selector will

be engaged normally.

2)Please select proper measurements range to minimize

the tolerance of readout.

3)Please don't keep or operate the instrument at

high temperature & humidity environment for a

long period.

4)Keep microphone dry & avoid serious vibration.

5)For general application of sound dB measurement,

we recommend select the panel switch to the

following position :

3-3 Time Weighting ( Fast/Slow ) selector

Select to " F "

3-4 Max. hold & Instant display selector

Select to " Instant "

3-7 A/C weighting selector

Select to " A weighting "

3-9 Range selector

Select to " 30 - 70 dB " or " 60 - 100 dB ".

3-10 Power off/On/Internal calibration selector

Select to " 1 " ( On ).

6. SIGNAL OUTPUT

1)The instrument is provided an 3.5 mm Dia. " Phone signal

output terminal " ( 3-7, Fig. 1 ) for connecting with

analyzer, level recorder, tape recorder, controller

...etc.

2)Output Signal :

AC output - AC 750 mVrms corresponding to each range

step.

7. REPLACEMENT OF BATTERY

1)When the left corner of LCD display show " BAT ", it is

necessary to replace the battery. However, in-spec.

measurement may still be made for several hours after "

Low battery indicator " appears before the instrument

become inaccurate.

2)Slide the " Battery Cover " ( 3-11, Fig. 1 ) & take the

battery away from the battery compartment..

)

Replace with 2 PCs 9V battery ( heavy duty type ) and

reinstate the cover.

8. CALIBRATION

The sound level meter is built in the internal calibration

" Calibration VR " ( 3-5, Fig. 1 ) on the front

panel. Please according the following procedures to

calibrate the instrument accurately, if it is necessary.

8-1 Calibrated via external SOUND CALIBRATOR

)

Prepare the optional " SOUND CALIBRATOR ", such as

" SC-941 " or " SC-942 ". Power on the Sound

Calibrator & plug calibrator output into the " Electric

condenser microphone " head ( 3-1, Fig. 1 ) of the

Sound Level Meter.

2)Slide the " Range selector " ( 3-9, Fig. 1 ) to " 60 - 100

dB " position.

3)Slide " Time Weighting selector " ( 3-3, Fig. 1 ) to

" F " position.

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