Aktakom ATE-9051 User manual

SOUND LEVEL METER
ATE-9051
User’s Manual

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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：
Environment conditions
①Altitude lower than 2000 meters
②Relatively humidity ≤90％RH
③Operation Ambient 0 ~ 40℃
Maintenance & Clearing
①Repair or servicing not covered in this manual
should be performed by qualified personnel. ②
Periodically wipe the case with a dry cloth. Do not
use solvents or eradicator on this instrument.
Safety symbols

Comply with EMC

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2. FUNCTIONS DESCRIPTION
This Sound Level Meter is designed for noise
project; quality control; illness prevention and cure and all
kinds of environmental sounds measurement.It is applied to
the sounds measurement at factory; school; office; traffic
access and household, etc.
This unit confirms to the IEC61672-1 CLASS2 for
Sound Level Meters.
MAX & MIN measurements
Over range display
Under range display
A & C Weighting
FAST & SLOW response
Analog AC/DC outputs for
connection to
frequency analyzer or X-Y shaft recorder
3. SPECIFICATION
Standard applied: IEC61672 -1 CLASS2
Accuracy: +1.4dB
Frequency range: 31.5HZ ~ 8KHZ
Dynamic range: 50dB

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Level ranges: LO ：30dB~80dB Med ：
50dB~100dB
Hi：80dB~130dB
Auto：30dB~130dB
Frequency weighting: A/C
Time weighting: FAST ( 125ms ), SLOW ( 1s )
Microphone: 1/2 inch electret
condenser microphone
Display: 4 digits LCD display with a resolution of
0.1dB
Display Update: 2 times/sec.
MAX hold: Hold the Maximum reading MIN
hold: Hold the Minimum reading HOLD:
Hold the readings
Alarm function: “OVER”is when input is more than
upper limit of range.
“UNDER”is when input is less than upper limit of range.
Analog output : AC/DC outputs from earphone outlet
AC=1Vrms ，DC=10mV/dB

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Data output : USB data traffic
Auto power off : Meter automatically shuts down
after approx. 15 minutes of inactivity.
Power supply :One 9V battery, 006P or NEDA1604
or IEC 6F22.
Power life : About 30hours
Operation temperature and humidity:
0℃~40℃,10％RH~90％RH
Storage temperature and temperature:
-10℃~+60℃，10％RH~75％RH
Dimension : 278 (L) x 76 (W) x 50(H) mm
Weight : 350g
Accessories : Instructionmanual, battery, screwdriver,
￠3.5mm earphone plug, windscreen,
software, USB cable, tripod and DC 9V power supply.

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4. NAME AND FUNCTIONS

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①Windscreen
②LCD：
SYMBOL
FUNCTION
LCD
4 digits
MAX
Maximum hold
MIN
Minimum hold
OVER
over range
UNDER
under range

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FAST
Fast response
SLOW
Slow response
dBA
A-Weighting(responseto
sense)
human
dBC
C-Weighting(response to
monitor)
machine
88—180
Range indicate
REC
Recording data into computer
AUTO
Auto level range selection
FULL
Memory full
HOLD
Data hold function
AutopoweroffPress the”SETUP“ button
to disable power off
Low battery indicate
③REC button

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3.0 DATALOGGER function
Press “REC” button after it power on, the display will show
“REC” to start Data Recording，press the button again to
delet the record (Note: In order to avoid data error, please
don’t power it off under REC condition, when the REC
function is deleted then it can power off).
④SETUP button
4．0．The time chip adjustment
Press‘SETUP’button and then power it on，when‘TIME’
symbol displays then loosen‘SETUP，’the meter will be
under time adjustment mode，at the time the display will
show the date as following：

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Press the‘SETUP’button second time, the display showing：
The display showing “minute” adjustment mode, press
‘LEVEL’to make the adjustment，press ‘HOLD’to keep
the setup；
Press the‘SETUP’button third time, the display showing：
The display showing “hour” adjustment mode, press
‘LEVEL’to make the adjustment，press‘HOLD’to keep
the setup；
Press the‘SETUP’button fourth time, the display showing
The display showing “date” adjustment mode, press
‘LEVEL’to make the adjustment，press‘HOLD’to keep

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the setup；
Press the‘SETUP’button fifth time, the display showing：
The display showing “month” adjustment mode, press
‘LEVEL’to make the adjustment，press ‘HOLD’to keep
the setup；
Press the‘SETUP’button sixth time, the display showing：
The display showing “year” adjustment mode, press
‘LEVEL’to make the adjustment，press ‘HOLD’to keep
the setup；
Press the‘SETUP’button seventh and eighth time, the

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display showing separately as following：
The display showing default range, which can’t be
adjusted.
Press the‘SETUP’button ninth time, the display showing：
The display showing initialization of the time chip，time and
date have returned to factory setup. When the battery is
exhausted or replaced, if the time can’t be adjusted then
please initialize the time chip first. 4．1．USB
communications setting：turn on the meter, connect the
meter with the computer correctly, choose the

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software COM3（COM4），then press ‘SETUP’，‘’
disappears from the display to indicate and disable auto
power off, that the USB data is transmitting.
⑤FAST/SLOW button:
time weighting selection
FAST：Fast sampling measurement, 1 time per 125mS.
SLOW：Slow sampling measurement, 1 time per second.
⑥MAX/MIN button: Maximum and Minimum hold
Press this button for one time to enter MAX/MIN
measurement, ‘MAX’ will appear on LCD, maximum
sound level will be captured and held until higher sound
level is captured. Press the button again, ‘MIN’ will
appear on LCD and minimum sound level will be
captured and held until new lower sound level is
captured. Press the button one more time to exit
MAX/MIN measurement.

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⑦LEVEL button: Level range selection
Each time you press “LEVEL” button, the level range
will change between ‘Lo’ level, ‘Med’ level, ‘Hi’ level
and ‘Auto’ level in the circular.
⑧Backlight button
Turn the backlight on/off
⑨Frequency weighting select button
A：A-Weighting C：C-Weighting
⑩HOLD button:
Press “HOLD” button, The hold function freezes the
reading in the display.
⑾Power button
Turn the meter power ON/OFF
⑿External DC 9V power supply terminal
For connection with DC 9V power supply.

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Aperture size: external diameter: 3.5mm, internal
diameter: 1.35mm
USB interface
USB signal output is a 9600 bps serial interface.
⒁AC/DC signal output earphone outlet
DC
AC：Output voltage：1Vrms corresponding to each
range step.
Output impedance：≒ 100Ω
DC：Output voltage：10mv/dB
Output impedance：≒ 1KΩ

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⒂Calibration potentiometer（CALL）
For external standard level calibration adjustments.
Tripod mounting screw
Battery cover
Microphone
1/2 inch Electret Condenser microphone
5. CALIBRATION PROCEDURES
①Make the following switch settings:
Frequency weighting: A-weighting
Time weighting: FAST
Level range: 50 ~100dB
②Insert the microphone housing carefully into the
1/2 inchinsertion hole of the calibrator（94dB@
1KHZ）.
③Turn on the switch of calibrator and adjust the
CALL potentiometer of the unit 94.0dB is
displayed.

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NOTE: All products are well calibrated before
shipment. Recommended recalibration cycle:
1 year.
Acoustic Calibrator
6. MEASUREMENT PREPARATION
①Remove the battery cover on the back and put in
one 9V battery.
②Recover the back cover.
③When battery voltage drops below the operating
voltage or battery aging, this symbol will appear
on LCD. Replace the 9V battery.
④When the AC adapter is used, insert the plug of

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the adapter （3.5φ）into the DC9V connector on
the side panel.
7. OPERATING PROCEDURE
①Power on the meter.
②Press ‘LEVEL’ button to select desired level, base on
‘UNDER’ or ‘OVER’ do not appear on LCD.
③Select ‘dBA’ for general noise sound level and ‘dBC’ for
measuring sound level of acoustic material.
④Select ‘FAST’ for instant sound and ‘SLOW’ for average
sound level.
⑤Select ‘MAX/MIN’ button for measuring maximum and
minimum noise level.
⑥Hold the instrument comfortable in hand or fix on tripod
and measure sound level at a distance of 1~1.5 meter.
8. NOTICE
i. Do not store or operate the instrument at
high temperature and high
humidity environment.
ii. When not in use for long time, please take

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out the battery to avoid battery liquid leakage
and cautery on the instrument.
iii. When using the instrument in the presence
of wind, it is a must to mount the windscreen
to not pick up undesirable signals.
iv. Keep microphone dry and avoid severe
vibration.
9. accessories:
①installation CD
②USB interface cable
③screwdriver
④tripod
⑤windscreen
⑥DC 9V power supply.
10. Installing the software
1.0 Start windows
1.1 Insert the CD into the CD-drive.

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1.2 Run SETUP.EXE installation program in file DISK1,
install it to the referred directory
1.3 install CP2102 drive software：
Connecting the meter with the computer by USB
interface, install CP2102 drive software in my
computer property:\hardware\facility
management\ COM CP210X USB.
USB Drive Installation
1. Copy the CP2101WIN Drivers to a certain directory, such
as: C:\
2. Connect the USBtothe computer,theWindowssystem will
showfinding anew hardware. Choose specific directory C:\
usb_driver according to the instruction.
3. After Driver installation, a new COM port will be added to
the Ports in the Device Manager. Port number will be
ranged following the primary COM ports, such as: COM3
or COM4.
4. Entry IR365 Application and choose the correct COM port.
Communication can be start after pressing ON-LINE.
1.4 Once the drive software is installed, start the
application software, connect the meter to the