Center 392 User manual

392
INTEGRATING
SOUND LEVEL METER
SE-392

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 Recording Data……………………………………........7
6.2 Recording Interval Setup…………………...………….7
6.3 Clearing Stored Data…………………………………...7
7. LEQ & INTEGRATING SETUP……………………………8
8. SETTING THE DATE AND TIME………………………… 8
9. CALIBRATION PROCEDURES….………………………..9
10. MEASUREMENT PREPARATION……..…….………..10
11. OPERATING PRECAUTIONS………………………….10
12. MEASUREMENT………….……………………………..11
13. SETUP TestLink SE-392……………………..…...........12

Integrating Sound Level Meter
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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 & Cleaning
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 selecting our Integrating 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 the requirements of IEC 61672-1 class 2 standard
Fast, Slow time weighting settings
A and C frequency weighting settings
Storage of up to 64,000 records data logger
USB interface

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With Windows software
AC/DC signal output
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: 50 segment bargraph
Resolution: 2dB
Display Update: 50 mS
Time weighting: FAST (125mS), SLOW (1 sec.)
Accuracy: ±1.4dB ( under reference conditions @ 94dB, 1KHz )
Dynamic range: 100 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
MAX/MIN hold: Hold readings of the maximum and minimum value.
AC output:1VrmsatFS(fullscale).
DC output: 10mV / dB
Power supply: Four IEC LR6 (AA-size) batteries
Power life: About 60hrs ( 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: 272(L)×83(W)×42(H)mm; 10.7(L)×3.3(W)×1.6(H)inch

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Weight: 390g ( including battery )
Accessories: 1.5V battery X 4pcs, carrying case, instruction manual,
windscreen, 3.5plug, software, micro USB cable.
Option: Microphone extension cable (5m or 10m length).
5. NAME AND FUNCTIONS

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Display Screen:
SYMBOL FUNCTION
Battery capacity indicator
Auto power off indicator
Maximum/Minimum indicator
Fast/Slow time weighting indicator
Sound level range indicator
Bar graph
Time-weighted sound level reading sound
pressure level
Equivalent continuous sound level reading
Time and elapsed time indicator
(hour:minute:second)
Start/pause/stop integrating sound level
measurements
The integrating time
A or C frequency weighting indicator
Sound level reading (30.0-130.0dB)
Date and elapsed time indicator(year-month-day)
Over-range signal indicator
Recording memory bank full
Data recording is in process
Under-range signal indicator
The integrating time counting indicator

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○
1Power button:
Press the button to turn on. Press and hold the button for 3 seconds to
turn off.
Auto Power Off:
When the unit is powered on, it is under auto power off mode by default.
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:
Press and hold the button and then power on the unit. Keep holding
button until the meter starts function. Make sure the auto power off symbol
disappears from the display screen.
Note: When the user powers it on, the LCD will show how much internal
memory space is available to use.
○
2Integrating time button:
Press the button to set the integrating time.
○
3REC button:
Press the button to start recording, and the “ ”symbol will display.
Press button again to stop record.
○
4SET button:
To set calendar / clock / Interval time.
(1) Press the CLOCK( ) button to set the date and time.
(2) Press the INTV( ) button to set interval time.
○
5/UP/DOWN button:
Press or to increase or decrease number.
○
6FAST/SLOW button:
Press the button to set the time weighting to Fast or Slow.
○
7Leq/SPL button.
Press the button to Select Leq or SPL mode.

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DC Signal
AC Signal Ground
○
8MAX/MINbutton:
Press the button to enter the maximum and minimum recording mode.
Under this mode, the maximum 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 “ ”
symbol indicator and the minimum value on the display.
Pressing the 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 until
the “ ” symbol is disappeared.
○
9Back light button:
Press it to turn on the LCD backlight, which is making it easier to read in the
dark environment.
Press it again to turn off backlight. The backlight will turn itself off automatically
after 30 seconds.
○
10 A/C button:
Press the button to set the frequency weighting to A or C.
○
11 Start/Pause/Stop button:
Press the button to set the Leq measurement to continuance, pause or stop.
○
12 Microphone:
1/2 inch electret condenser microphone.
○
13 USB Interface:
Connect to a computer or external power supply input.
○
14 AC/DC signal output jack:
Connect the AC/DC output on the bottom of the unit to the level recorder.
AC: 1 Vrms Corresponding to 130dB. ( with frequency weighting )
DC: Output: 10mV/dB

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○
15 Tripod mounting thread:
For long-term measurements, the unit can be mounted on a camera tripod.
Proceed carefully to avoid dropping the unit.
○
16 Battery Compartment.
6. DATA LOGGER & INTERVAL SETUP
6.1 Recording Data:
Press the button to start recording the measured values. The values are
stored in a memory location. Press button again to stop recording.
Note:
During the recording period, most of the buttons, such as the and
are inoperative. All settings must be made before starting the record
operation.
LCD will show FULL symbol when 64000 recorders are stored in memory.
6.2 Recording Interval Setup:
(1) Press the button and then press the INTV( ) button, the “ Int ”
appears for interval, as well as a flashing second display.
(2) Now set the desired recording interval in minutes and seconds. Use the
or button to increase or decrease number. Max 1 minute can be set.
The minimum value is limited to “00:01”(=1s). Press INTV( ) to store the
setting and exit this mode. If you want to abort during a setup process, press
button to cancel.
6.3 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 "CLr"
symbol will appear on the display indicating that the
data have been erased.
Note:
The battery indicator “ ” shows the remaining
battery power. When battery power is extremely
low( ), recording function cannot be performed.

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Press button, LCD display will show “ Lo bat ”warning indication. If the
meter is under the record mode, it will stop automatically.
7. Leq & INTEGRATING SETUP
7.1 Setting The Integrating Measurement Time︰
(1) Press the button to enter time setup.
(2) Press the or button to select 10sec, 1min, 5min, 10min, 20min,
30min, 1hr, 2hr, 4hr, 8hr, 16hr, 24hr setting.
(3) Press button again to finish setting.
(4) Press button to exit setting anytime.
7.2 Equivalent Continuous Sound level(Leq) Measurement:
Press the button to select Leq or SPL.
Under Leq measurement, “Leq” symbol is displayed.
(1) Press the button to start, the “ ▶” symbol and the elapsed
measurement time are displayed.
(2) When the Leq measurement time is up, it will automatically terminate
and the “ ■ ” symbol is displayed.
(3) During the Leq measurement, the button can be pressed to
pause, stop or restart. During the pause period, the Leq measuring values
are not evaluated.
(4) During the pause, the pause symbol “ ” is displayed.
(5) To stop the measurement, press the button for 2 seconds.
(6) If an under or over range condition occurs during Leq measurement, the
or symbolwillbekeptonthedisplay.
(7) During this procedure, / / buttons are inoperative.
8. SETTING THE DATE AND TIME
The unit is equiptted with a clock to stamp the measuring date / time.
Date / Time setting Sequence: Year - Month - Day– Hour : Minute : Second
(1) Press the button and then press the CLOCK( ) button to enter
the date and time setting mode.
(2) Press CLOCK( ) button to select year, month, day, hour, minute,
second setup.

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(3) Press or to increase or decrease number to adjust Date / Time.
(4) Press CLOCK( ) button to finish setting.
(5) Press button to exit setting anytime.
Note: There is an internal rechargeable backup battery to run the clock. When
the power is turned off, the backup battery can be recharged by the AA
batteries or DC adapter power source. The clock running can be kept for 30
hours if there is no any power source installed. If the unit will not be used for a
long time, the AA batteries shall be removed to prevent the damage by the
battery fluid leakage. Be sure to set the date and time after reinstalling the
batteries.
9. CALIBRATION PROCEDURES
(1) Press and hold MIN MAX button and then
power on the meter, LCD displays “ CAL
94dB ” symbol.
(2) Insert the microphone housing carefully
into the insertion hole of the calibrator.
(3) Press or button to increase or
decrease number.
(4) Press button to finish calibration.
(5) Press button to exit calibration.
Note:
Our products are all well calibrated before
shipment.
Recommended recalibration cycle: 1 year.
Using a standard Acoustic Calibrator
(94dB, 1KHz Sine wave)

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10. MEASUREMENT PREPARATION
(1) Battery Loading:
(a) Back out the screw at the top of the battery cover and lift the cover
away from the unit.
(b) Insert the four AA batteries, observing proper polarity as depicted on
the bottom of the battery compartment.
(c) Replace the battery cover and tighten the screw.
Note: It is possible to use size AA rechargeable batteries, but the unit
does not recharge batteries.
(2) Battery capacity indicator:
When operating the unit on batteries, periodically check this indicator to
determine the remaining battery capacity.
(3) DC Adapter Connection:
When the DC adapter is used, insert the plugs of the adapter into the DC5V
connector on the bottom panel.
Note: When the DC adapter is connected, the unit will be powered from the
adapter, even if the batteries are inserted (The DC adapter is priority power
source).
11. OPERATING PRECAUTIONS
(1) Wind blowing across the microphone would bring additional extraneous
noise.
When using the instrument in the presence of wind, it is a must to mount the
windscreen to not pick up undesirable signals.
(2) Calibrate the instrument before operation if the instrument was not in use
for a long time or operated in bad environment.
(3) Do not store or operate the instrument at high temperature and high

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humidity environment.
(4) Keep microphone dry and avoid severe vibration.
(5) Please take out the battery and keep the instrument in low humidity
environment when not in use.
12. MEASUREMENT
(1) Turn power on and select the desired response time and frequency
weighting. If the sound source consists of short bursts or only catching sound
peak, set response to FAST. To measure average sound level, use the SLOW
setting. Select A-weighting for general noise sound level and C-weighting for
measuring sound level of acoustic material.
(2) Hold the instrument comfortably in hand or fix on tripod and point the
microphone at the suspected noise source, the sound pressure level will be
displayed.
(3) When MAX MIN (maximum, minimum hold) mode is chosen, the
instrument captures and holds the maximum and minimum noise level for a
long period using any of the time weightings.
Press the button for 2 seconds to clear the maximum and minimum
reading, “ ” symbol disappears.
(4) Turn off the instrument.

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13. SETUP TestLink SE-392 (Sound Level Meter)—
USB interface software:
The SE-392 package contains:
1. 80mm CD.
2. Micro USB cable.
System Required:
Windows XP / VISTA / 7 / 8 / 10.
Minimum Hardware Required:
PC or NoteBook with CD-ROM ;
At least 50 MB byte hard disk space available to install SE392.
Install SE-392:
1. Insert setup CD disk to CD disk drive, Windows will run the setup.exe
automatically.
2. If the Windows fail to run the setup.exe automatically, choose the Start
button on the Taskbar and select Run. Type E:\SETUP and choose OK.
3. Follow the instruction to finish the installation.
4. It will copy SE392.exe ( executable file ) and help file to your hard disk
( default is c:\program files\SE392 ).
For detailed other operation instruction, please refer to the online help while
executing SE392.
Main Menu
File | Open- Retrieve files
Save - Save the active window (when the caption bar is highlighted) data to
file.
Print - Print the graph of the active window.
Printer Setup - Select printer.
File | Exit: Terminates SE392 program.
View | Control Panel: By opening the Panel Window, the user can control
meter via the button in this window.
View | Real-Time Graph: Open Real-Time Graph display to graph the
present data.
Real Time Data | Run - Start collecting real time data.
Stop - Stop collecting real time data.
DataLogger: By opening the DataLogger Window, the user can load
recorded data of meter to PC in this window.

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Erase Memory: Delete measurement series stored in the
instrument memory.
LEQ: Perform LEQ calculation from online data.
Graph
Tool Bar
- Display or hide Statistic1.
- Display or hide Statistic2.
- Normal cursor.
- When selected, the mouse cursor will become a cross sign when
moving to the graph, click on the graph to mark a cross sign on the
graph.
- When selected, the mouse cursor will become a "I" sign when
moving to the graph, click on the graph to annotate.
You can choose a rectangle area on the graph to zoom in for detail.
There are two vertical line (CURSOR A and CURSOR B) in the graph.

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There are time and value display on top and right side of each cursor. You
can move mouse cursor over cursor A or B and click to drag cursor to
move left or right. Right below cursor A and B is a slider. You can also
click and drag slider to move cursor A or B. Below the slider is the statistic,
it displays start time, sampling rate, data number, maximum and minimum
of the graph. The statistic also displays the maximum, minimum and
average between cursor A and B and these data will update automatically
when cursor A or B is moving.
You can double click the graph to call the option dialog. In option dialog, it
is allowed to customize your graph style.
And you can right click the graph (real time graph is not allowed) to call out
the popup menu.
You can Zoom this graph by using mouse:
To Zoom:
1. Press the left mouse button and drag the cursor to select the new
extents.
2. Release the mouse button.
To Undo the Zoom - Right click on the graph, there will be a pop-up menu,
select Undo Zoom.
DataLogger

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When you have Sound Level DATA
LOGGER meter connected to PC and
select "DataLogger" from main menu
or click from tool bar to load
recorded data from the meter and
there will be a progress indicator to
show the loading progress, if error
occurs, just click "DataLogger" again.
After the data was loaded, the left
hand side will show how many data
sets were loaded and detail
information for each data set (start
data, start time, recording rate and
record numbers).
It will transfer first data set to graph and tabular on the right hand side every
time after you load recorded data from the Sound Level Meter and you can
click at any data set to change the set for graph.
On the right hand side sets the waveform graph and statistic information of the
data set you choose as refer to the graph.
Tutorial - Quick Start to Use SE392
(1) Recording real time data in waveform.
(a) Power on the Sound Level Meter first and connect it to a PC USB port
with the cable.
(b) Start SE392 program.
(c) If the connection is successful, the panel
will display the same value as the Sound
Level Meter. If fail to connect the meter with
PC, it will display "No Connection" on the
panel window in SE392.
(d) When the connection is successful, click
to start recording real time data and
there will be a waveform on the Real Time
Graph Window.
for examples:

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(e) Click to start recording.
(2) How to save the recorded real time data to a file?
(a) Click the graph window you want to save and the graph window will
become active, then choose File | Save from main menu or click from the
tool bar.
(b) There will be a save dialog window for you to choose the file name and
file type to save. There are three types of file name you can choose, binary
file(*.ghf), text file(*.txt) and EXCEL format file(*.csv). The *.ghf file use
much fewer disk space to save the data than the other two file format, but it
can only be used in SE392. Text file can be opened by SE392 and any
other word processor program like word, notepad etc. EXCEL format file
can be opened by SE392 and Microsoft EXCEL.
(3) How to load the recorded data from the memory of Sound Level Meter
and save it to a file?
(Only for the model with Data Logger)
(a) Power on the Sound Level Meter.

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(b) Press the REC button of the meter to start recording data.
(c) After a while, press REC button again to stop recording data.
(d) Connect the Sound Level Meter to PC.
(e) Start SE392 program.
(f) Choose Data Logger from main menu or click from tool bar.
(g) In reference to Data Logger, see DataLogger.
Frequently Asked Question:
1. How can I save the graph to a file which can be used in EXCEL?
Answer: When you save a graph to a file, the default file format is "*.ghf"
and you can select *.csv to save files. CSV is an EXCEL file format. You
can open it in EXCEL.
2. How to uninstall SE392?
Answer: Uninstall SE392 by launching the Add/Remove Programs applet
out of the Control Panel, highlighting the SE392, and clicking on the
Add/Remove... push button, then it will remove the SE392 folder and files
from your computer.
3. How to zoom the graph?
Answer: Press the left mouse button and drag the cursor to select the new
extents, and then release the mouse button.

GCA000392-02000
CENTER TECHNOLOGY CORP.