Center C322 User manual

INTV
CLOCK
POWER-UP OPTIONS
Hi =
Auto=
Med=
Lo =
REC
100 dB
80 dB
130 dB
130 dB
80
30
30
50
LEVEL
MAX
MIN SLOW
FAST
SETUP
AC
322
Data Logger
SOUND LEVEL METER

CONTENTS
Title Page
I. SAFETY INFORMATION………..………..………….. 1
Environment conditions………………………………..1
Maintenance & Clearing……………………………….1
Safety symbols………………………………………… 1
II. GENERAL DESCRIPTION……………………..…….. 2
III. SPECIFICATIONS..…………………..……………….. 2
IV. NAME AND FUNCTIONS..………….……………….. 5
V. CLOCK & INTV SETUP……………………….……… 6
DataLogger…………………………………………….. 6
Clock Setup……………………………………………..6
Recording Interval Setup……………………………... 7
Auto Power Off………………………………………… 7
VI. CALIBRATION PROCEDURES….………………….. 7
VII . MEASUREMENT PREPARATION………….………. 8
VIII. OPERATING PRECAUTIONS………………………. 8
IX. MEASUREMENT………….………………………..… 9
X. Setup TestLink SE-322 (Sound Level Meter)—
RS232 interface software……………………..……...9

DATA LOGGER SOUND LEVEL METER
1
I. 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℃
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 instruments.
Safety symbols
Comply with EMC
When servicing, use only specified replacement parts.
II. GENERAL DESCRI PTION
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.
This unit conforms to the IEC651 type2, ANSI S1.4 Type2 for Sound Level
Meters.
This Data Logger Sound Level Meter internal memory can keep up to 32000
records.(Note 1.)
It uses RS232 interface to perform bi-directional communication with PC.
Note1:
Every time you press “REC” button to start recording data and press “REC” button again to stop
recording, there will be a data set in memory, you can store as many data sets as you want unit
memory is full.

DATA LOGGER SOUND LEVEL METER
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III. SPECI FI CAT I ON S
Standard applied : IEC651 Type2, ANSI S1.4 Type2.
Frequency range : 31.5Hz ~ 8KHz
Measuring level range : 30 ~ 130dB
Frequency weighting : A / C
Microphone : 1/2 inch electret condenser microphone
Display : LCD
Digital display : 4 digits
Resolution: 0.1dB
Display Update: 0.5 sec.
Analog display : 50 segment bargraph
Resolution : 1dB
Display Update : 50 mS
Time weighting : FAST ( 125mS ), SLOW ( 1 sec. )
Level ranges : Lo : 30 – 80 dB
Med : 50 – 100 dB
Hi : 80 – 130 dB
Auto : 30 – 130 dB
Accuracy : ±1.5dB ( 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.
MAX/MIN hold : Hold readings the Maximum and Minimum Value.
AC output : 1 Vrms at FS ( full scale ).
Output impedance : Approx. 100Ω
FS: means the upper limit of each level range.
DC output : 10mV / dB , output impedance approx. 1KΩ
Power supply : One 9V battery, 006P or IEC 6F22 or NEDA 1604.
Power life : About 50hrs ( alkaline battery )
AC adapter : Voltage 9 VDC ( 8-10VDC Max )
Supply current : > 30mADC Socket : pin → Ground
Casing → Positive External Diameter → 3.5mm
Internal Diameter → 1.35mm

DATA LOGGER SOUND LEVEL METER
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Electromagnetic Compatibility:
RF field = 3V/m
Total accuracy = specified accuracy + 0.5dB
Operation temperature : 0 to 40℃ ( 32 to 104℉ )
Operation humidity : 10 to 90%RH
Storage temperature : -10 to 60℃ ( 14 to 140℉ )
Storage humidity : 10 to 75%RH
Dimensions : 275 (L) ×64 (W) ×30 (H)mm
10.8 (L) ×2.5 (W) ×1.2 (H)inch
Weight : 285g ( including battery )
Accessories : 9V battery, carrying case, Screwdriver, Instruction manual,
Windscreen, 3.5ψ plug, software, RS-232 cable.
Option : AC Adapter, USB Cable
IV. NAM E AND FU N CTIONS
OPEN
MANUAL FOR SAFETY
NEDA 1604 6F22 006P
PLEASE READ
9V BATTERY
2
1
3
4
5
7
6
9
RS-232
CAL
OUTPUT
DC 9V
SETUP
POWER-UP OPTIONS
30Lo =
Med=
Auto=
Hi =
50
30
80
REC
MAX
MIN
CLOCK
80 dB
100 dB
130 dB
130 dB
LEVEL
SLOW
INTV
FAST
C
A
8

DATA LOGGER SOUND LEVEL METER
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○
1 Windscreen
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
SYMBOL FUNCTION
LCD 4 digits
MAX Maximum indication
MIN Minimum indication
Over range
Under range
FAST Fast response
SLOW Slow response
dBA A-Weighting
dBC C-Weighting
Range Indicate
Low-Battery
Under range 20dB
AUTO Auto Level range selective
REC Recording Datalogger
FULL Memory full
Auto Power OFF active
○
3Power & Backlight button
The ○I key turns the sound level meter ON or OFF and backlight ON & OFF.
Press it once to turn on the sound level meter.
Press it again for moment to turn ON or OFF backlight .

DATA LOGGER SOUND LEVEL METER
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Press and hold this button 3 second to turn OFF the power.
Note: When the user power it on, the LCD will show how much memory
space is available to use.
○
4MAX / MIN hold button
Press button to enter the maximum and minimum recording mode.
Select the proper Level range before using MAX/MIN to ensure that reading
value will not exceed the measurement range. Press once to select MAX
value. Press again to select MIN value, and press again to select current
value with “ MAX MIN “ annunciator blinking.
Press and hold down button for 2 seconds to exit the MAX MIN mode.
Note: If change sound level range or change A-C weight, the MAX.MIN
mode will clear.
○
5Record Datalogger button
When one press the button, the meter will star recording. The “REC”
annunciator are display, press again will stop recording.
○
6Frequency Weighting select button
A : A - Weighting. for general sound level measurements.
C : C - Weighting. for checking the low-frequency content of noise.
( If the C-Weighted level is much higher than the A-weighted level, then
there is a large amount of low-frequency noise )
○
7Time weighting select button
FAST : for normal measurements
SLOW : for checking average level of fluctuating noise.
○
8Level range 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 CAL potentiometer
Calibration control , For level calibration adjustment.
○
11 RS-232 Interface:
The RS-232 signal output is a 9600 bps N 8 1 serial interface.

DATA LOGGER SOUND LEVEL METER
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DC Signal
AC Signal Ground
○
12 Signal output terminal
AC: 1 Vrms Corresponding to each range step.
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
Output impedance ≒ 1KΩ
Output signal by standard 3.5mm coaxial socket signal on middle.
○
13 External DC 9V power supply terminal
For connection with AC adapter.
○
14 Tripod mounting screw.
○
15 Battery Cover
V. DATA LOGGER CLOCK & I N T ERVAL SETUP
▪ DataLogger:
When one presses the "REC" button, the meter will
start recording, and pressing the "REC" button again
will stop recording, If you want to clear the memory,
power off the meter, then press and hold “REC” button
and then press power button and hold at least 5
seconds, then LCD will show "CLR" and “SURE” to
clear the memory.
▪ Clock Setup :
1: press and hold “A/C” button and then power on the
meter:
2: press “MAX MIN”(clock) button:
3: press "REC" ▲ or "LEVEL" ▼ to increase or decrease
number, press “MAX MIN”(clock) to adjust next item. The
adjusting order is year →month →day →hour →minute,
then press “MAX MIN” (clock) to finish adjusting. If you
want abort during a setup process, press power button to
cancel.

DATA LOGGER SOUND LEVEL METER
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MIN
MAX
C
A
FAST
SLOW
IEC 651 TYPE II
50
Med= 100 dB
Hi = 80 130 dB
LEVEL
Lo = 30 80 dB
CAL
IEC 60942 Class 2
ANSI S1.40 - 1984
OFF
94dB
114dB
▪ Recording Interval Setup :
1: press and hold “A/C” button and then power on the
meter:
2: press “FAST/SLOW"(INTV) button:
3: press "REC" ▲ or "LEVEL" ▼ to increase or decrease
number, press “FAST/SLOW " (INTV) to adjust next item,
then press “FAST/SLOW” (INTV) to finish. If you want
abort during a setup process, press power button to
cancel.
▪ Auto Power Off:
By default, when the meter is powered on, it is under auto power off mode.
The meter will power itself off after 30 minutes if no key operation and no
RS232 communication and no recording combination at power on can
disable auto power off.
One may press and hold “FAST/SLOW” button and then power on the meter
and the will not show up to indicate that auto power off is disabled.
VI. CALIBRATION PROCEDURES
▪ Using a standard Acoustic Calibrator
( 94dB , 1KHz Sine wave )
Acoustic Calibrator
Screwdriver

DATA LOGGER SOUND LEVEL METER
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(1) Make the following switch settings.
Display : dBA
Time weighting : FAST
Measurement mode : MAX MIN Mode function disable.
Level range : 50 to 100dB
(2) Insert the microphone housing carefully into the insertion hole of the
calibrator.
(3) Turn on the switch of calibrator and adjust the CAL potentiometer of the
unit. The level display will indicate the desired level.
All products are well calibrated before shipment.
Recommended Recalibration cycle : 1 year.
VII . MEASUREM ENT PREPARATION
(1) Battery Loading
Remove the battery cover on the back and put in one 9V Battery.
(2) Battery Replacement
When the battery voltage drops below the operating voltage, this symbol
will appear . Replace 9 Volt battery.
(3) AC Adapter Connection
When the AC adapter is used , insert the plugs of the adapter into the DC9V
connector on the side panel.
VIII. 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
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.

DATA LOGGER SOUND LEVEL METER
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IX. MEASU REMEN T
(1) Open battery cover and install a 9V battery in the battery compartment.
(2) Turn power on and select the desired response Time and 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.
(3) Select desired Level.
(4) 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.
(5) 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 and ranges.
Press the MAX MIN button 2 seconds to clear the MAX/MIN reading .
“ MAX/MIN ” symbol disappears.
(6) Turn OFF the instrument and remove battery when not in use.
X. Setup Te stLink SE-322 (Sound Leve l Meter)—RS2 3 2
int e rfa c e soft w a re :
 The TestLink package contains:
1.80mm CD.
2.Custom designed RS232 cable for TestLink.
 System Required:
Windows 98/ NT 4.0/ NT2000/ XP / VISTA.
 Minimum Hardware Required:
PC or NoteBook with Pentium 90MHz or higher, 32 MB RAM ;
At least 5 MB byte hard disk space available to install TestLink.
Recommended resolution 800X600.

DATA LOGGER SOUND LEVEL METER
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▪ Install TestLink:
1.We recommend close all other application before installing TestLink.
2.Insert setup CD disk to CD disk drive.
3.Choose the Start button on the Taskbar and select Run.
4.Type E:\SETUP and choose OK, then it will copy SE322.exe ( executable
file ) and help file to your hard disk ( default is c:\program
files\TestLink\SE322 ).
For detailed other operation instruction, please refer to the online help while
executing SE322.
▪ Main Menu
File | Open- Retrieve files from the disk.
Save - Save the active window(when the caption bar is highlighted) data to
the disk.
Print - Print the data of the active window(graph or list).
Printer Setup - Select printer.
File | Exit:Terminates TestLink 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.
Output To Graph - Graphing tabular data.

DATA LOGGER SOUND LEVEL METER
11
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.
- Color graph.
- Monochrome graph.

DATA LOGGER SOUND LEVEL METER
12
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.
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

DATA LOGGER SOUND LEVEL METER
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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
recoreded 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).
for examples:
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 is the waveform graph and statistic of the data set
you choose. In reference to graph.
▪ Tutorial - Quick Start to Use SE322 TestLink
(1.) Recording real time data in waveform.
1.Power on the Sound Level Meter first and connect it to a PC RS-232
serial port wit the cable(SE-300)
2.Start SE322 program.

DATA LOGGER SOUND LEVEL METER
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3.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 TestLink Se322.
4.When the connection is successful , click to start recording real time
data and there will be a waveform on the Real Time Graph Window.
5.Click to start recording .
(2.) How to save the recorded real time data to a file ?
1.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 .
2. 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 TestLink SE322. Text file can be
opened by TestLink SE322 and any other word processor program like
word, notepad etc. EXCEL format file can be opened by TestLink SE322
and Microsoft EXCEL.

DATA LOGGER SOUND LEVEL METER
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(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)
1. Power on the Sound Level Meter.
2. Press the REC button of the meter to start recording data .
3. After a while, press REC button again to stop recording data.
4. Connect the Sound Level Meter to PC
5. Start SE322 program.
6. Choose Data Logger from main menu or click from tool bar.
7.In reference to Data Logger , see DataLogger.

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▪ Frequently Asked Question
1.I had connected Sound Level Meter to PC serial port and turned
meter power on, but it still show "NO CONNECTION".
Answer: It could be that all serial port are occupied by other application,
close all other application . If it still don't work. Restart your computer and
run TestLink SE322 again.
2. 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.
3.How to uninstall TestLink SE322 ?
Answer:Uninstall TestLink SE322 by launching the Add/Remove Programs
applet out of the Control Panel, highlighting the SE322, and clicking on the
Add/Remove... push button, then it will remove the SE322 folder and files
from your computer.
4.Why loading data fail?
Answer:This might cause by the slow respond from some of the notebook
PC system.
5.How to zoom the graph?
Answer: Press the left mouse button and drag the cursor to select the new
extents, then release the mouse button.
6.When I setup the real time sampling with a fast rate(eg. 0.1 sec),
Some of the sampling data might be lost.
Answer: This might be caused by slow response time of the PC.

4 / F NO. 415, Jung-Jeng Rd., 238 Shu-Lin, Taipei, Taiwan
TEL: [phone] E-Mail : [email protected]
FAX: [phone] http : / / www.centertek.com
GCA000322-22000
CEN T ER T ECH NOLOGY CORP.
Authorized Distributor in Australia
Pacific Sensor Technologies Pty Ltd
Unit 4, 3 Neutron Place Rowville, VIC 3178 Australia
1300 662 720 | [email protected]
www.pacificsensortech.com.au