Center 323 Manuel utilisateur

323

Data Logger

SOUND LEVEL METER

SE-323

CONTENTS

Title Page

1. SAFETY INFORMATION………..………..………………..1

2. GENERAL DESCRIPTION ……………………..……...….1

3. FEATURE ………………………………………………......1

4. SPECIFICATIONS ..…………………..…………………....2

5. NAME AND FUNCTIONS ..………….……………............3

Display screen……………………………………………….4

6. DATA LOGGER & INTERVAL SETUP……………….…..7

6.1 Auto store …………………………………………….....7

6.2 Clearing Stored Data …………………….…………….8

7. SETTING THE DATE AND TIME………………………… 8

8. CALIBRATION PROCEDURES….………………………..9

9. MEASUREMENT PREPARATION………….………........9

10. OPERATING PRECAUTIONS………………………….10

11. MEASUREMENT………….……………………………..11

12. SETUP SE-323………………………………..…...........11

Sound Level Meter

1. SAFETY INFORMATION

Read the following safety information carefully before attempting to operate or

service the meter.

Use the meter only as specified in this manual; otherwise, the protection

provided by the meter may be impaired.

Environment conditions

Altitude up to 2000 meters

Relatively humidity 90% max.

Operation Ambient 0 ~ 40C

Maintenance & Clearing

Repairs or servicing not covered in this manual should only be performed by

qualified personnel.

Periodically wipe the case with a dry cloth. Do not use abrasives or solvents

on this instrument.

Safety symbols

Comply with EMC

When servicing, use only specified replacement parts.

2. GENERAL DESCRIPTION

Thank you for using our Data Logger Sound Level Meter. To ensure that you

can get the most from it, we recommend that you read and follow the manual

carefully before use.

Measurement settings and results (level values and bar graph) are shown on

the backlit LCD panel.

Data can be stored in the meter or directly saved on a computer through USB

interface. Recorded data can be further processed on a computer.

3. FEATURE

Complies with IEC 61672-1 class 2 standard

64,000 Records Data Logger

USB Interface

With Windows software

AC/DC signal output

Sound Level Meter

4. SPECIFICATIONS

Standard applied: IEC61672-1 Class 2,ANSI S1.4 Type2.

Frequency range: 20Hz ~ 8KHz

Measuring level range: 30 ~ 130dB

Frequency weighting: A / C

Microphone: 1/2 inch electret condenser microphone

Display: Liquid Crystal Display

Digital display: 4 digits

Resolution: 0.1dB

Display Update: 0.5 sec.

Analog display: 30 segment bargraph

Resolution: 2dB

Display Update: 50 mS

Time weighting: FAST , SLOW

Level ranges: Lo : 30 – 90 dB

Med : 50 – 110 dB

Hi : 70 – 130 dB

Auto : 30 – 130 dB

Accuracy: ±1.4dB ( under reference conditions @ 94dB, 1KHz )

Dynamic range: 60 dB

Alarm function: “OVER” is when input is more than upper limit of range.

“ UNDER ” is when input is Less than lower limit of range.

Data logging Capacity: 64,000 records

AC output: 1 Vrms at FS ( full scale )

(FS︰means the upper limit of each level range.)

DC output: 10mV / dB

Power supply: 4AAA,NEDA 24A, IEC LR03 batteries

Power life: About 24hrs ( alkaline battery )

Power consumption: Approx. 0.2W

External power supply: 5 VDC ( micro USB plug)

Operation temperature: 0 to 40C ( 32 to 104F )

Operation humidity: 10 to 90%RH

Storage temperature: -10 to 60C ( 14 to 140F )

Storage humidity: 10 to 75%RH

Dimensions: 264(L)×63(W)×29(H)mm; 10.4(L)×2.5(W)×1.1(H)inch

Sound Level Meter

Weight: 245g ( including battery )

Accessories: 1.5V battery X 4pcs, carrying case, Instruction manual,

Windscreen, 3.5plug, software, USB Cable.

Option: Microphone Extension Cables (5m or 10m length).

5. NAME AND FUNCTIONS

Sound Level Meter

Display Screen:

SYMBOL FUNCTION

Battery capacity indicator

Auto power off indicator

Maximum/Minimum indicator

Time weighting indicator

Level range indicator

Bar graph

Time

Frequency weighting indicator

Level reading

Date

Over-range signal indicator

Memory full

Recording datalogger indicator

Under-range signal indicator

Sound Level Meter

○

1Windscreen:

When making outdoor measurements in windy weather or when measuring

air conditioning equipment or similar, wind noise at the microphone can

cause measurement errors. Such effects can be reduced by using the

windscreen.

○

2Display screen.

○

3Power button:

Press the button to turn the meter on. To turn the unit off, press and

hold button down until the screen shows “ OFF 3, 2, 1,” then the LCD

screen goes off.

LCD backlight on/off:

Press to turn on the LCD backlight. This makes it easier to read in

dark environment. Press again to turn off backlight. The meter can

also turn the backlight off automatically after 30 seconds to save battery

power.

Auto power off.

To save battery life, by default, when the unit is powered on, it is under auto

power off mode.

The unit will power itself off after 30 minutes if no key operation.

Auto power off will be disable under the following 2 circumstances.

(1) When connecting to PC.

(2) When recording function is on process.

Disabled auto power off.

One may press and hold button and then power on the meter and the

will not show up to indicate that auto power off is disable.

Note: When the user powers it on, the LCD will show how much internal

memory space is available to use.

○

4MAX/MIN button:

Press button to enter the maximum and minimum recording mode.

Under this mode, the maximum value and minimum value will be stored

and automatically updated in the memory simultaneously.

Pressing the button will display the “ ” symbol and the

Maximum value on the display. Pressing button again will display the

Sound Level Meter

DC Signal

AC Signal Ground

“ ” symbol indicator and the Minimum value on the display.

Pressing button again will cause the maximum and minimum

indicators to blink together. Which means the meter is under maximum and

minimum recording mode. The value displays on the screen is the present

value.

To exit the maximum and minimum mode, press and hold button

down until the “ ” symbol is disappears.

○

5REC button:

When press the button, the unit will start recording, and the “ ” symbol

display. To stop recording press again button.

○

6A/C button:

Sets frequency weighting to A or C.

○

7FAST/SLOW button:

Sets the time weighting to Fast or Slow.

○

8Range control button

Each time you press button, the level range will change between

“Lo” level, “Med” level, “Hi” level and “Auto” level in the circular.

○

9Microphone:

1/2 inch Electret Condenser microphone.

○

10 AC/DC signal output jack:

AC︰1 Vrms Corresponding to each

range step. (with frequency weighting)

Output impedance ≒100Ω

Output signal by standard 3.5mm

coaxial socket signal on pin.

Note: At “Auto” level range, output signal is Auto select on “Lo” or “Med” or

“Hi” level range.

DC: Output: 10mV/dB

○

11 USB Interface

Connection to a Computer or external power supply intput.

Sound Level Meter

○

12 Tripod mounting thread:

For long-term measurements, the unit can be mounted on a camera tripod.

Proceed carefully, to avoid dropping the unit.

○

13 Battery compartment.

6. DATA LOGGER & INTERVAL SETUP

How to store data in memory.

Auto store Interval time setup:

(1) Press and hold “ ” button and then power on the

meter.

(2) Press INTV() button, “ Int ” appears for interval, as

well as a flashing second display.

(3) Now set the desired recording interval in minutes and

seconds. Press ▲() or ▼( ) to increase or

decrease number, Max 1 minute can be set. The minimum

value is limited to “00:01”(=1s). After setting has been

performed, actuate the press INTV() button once, to get

back to the display of the instantaneously measured values.

If you want abort during a setup process, press button

to cancel.

6.1 Auto store:

Auto store Interval time setup:

When one presses the button starts saving the measured values .The

values are stored in a memory location. Press button again will stop

recording.

Note: During recording period, most of the buttons such as the , ,

are inoperative. All other settings must be made before starting the

record operation.

LCD will show FULL symbol when 64,000 recorders are stored in memory.

Sound Level Meter

6.2 Clearing Stored Data :

If you want to clear the memory, power off the unit,

then press and hold button and then press

button and hold at least 5 seconds, then LCD

will show "CLr" and “SURE” to clear the memory.

Note:

The battery indicator “ ” shows the remaining

battery power. The number of black bar decreases as

the battery running out. When the power is almost

empty, “” will disappear. Press button,

LCD display will show “ Lo bat ” warning indication. If

the meter is under record mode, it will stop.

7. SETTING THE DATE AND TIME

The unit incorporates a clock so that the data logger function

can also record the data and time along with the measurement

value in the memory.

(1) Turn off the unit.

(2) Enter SETUP mode by pressing and holding button

and then press power button to turn on the unit.

“SEt ” blinks on the LCD screen.

(3) Press CLOCK() button to set clock.

(4) Press ▲() or ▼( ) to adjust year, press

CLOCK() button to adjust next value (month

datehourminutesecond).

(5) When finish, press CLOCK() button to exit SETUP

mode.

Note:

(1) To abort during the process, press power button to exit SETUP mode.

(2) An internal rechargeable backup battery keeps the clock of the unit running

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