WINTACT WT85 User manual

13 2
Figure4
Install three 1.5V AAA Batteries
Sound Level Meter
Instruction manual
dBA
HOLD MAX
Sound Level Meter
WT85B
dBA
HOLD MAX
Sound Level Meter
WT85
WT85
WT85B(Bluetooth type)
A. Introduction
B. Calibration Method
E. Operating Instructions
Attention: Db-tester App only supports android 5.0 and iOS 9.0 or above
Version：WT85/WT85B-EN-00
The appearance design of digital sound level meter
is novel, small and portable(App is just for the bluetooth
version only).The digital sound level meter is applicable
for measurement of noise engineering, quality control,
health prevention and various environmental noise,
including noise measurement in such various places as
factories, offices, transporting routes, families, stereo
equipment and other places.
Production Function:
1.The digital sound level meter is equipped with APP for
mobile phone which communicates with the meter
through Bluetooth and offers various operations of
sound level meter. The meter has recording function,
up to 20,000 data can be recorded ( App is just for the
Bluetooth version only).
2.Sound level measurement(dBA).
3.MIN/MAX/ Lock current value.
4.Hold the measurement data.
5.LCD backlight function.
6.Manual/auto shutoff.
7.Backlight alarming.
Figure 1（Diagram of audio source calibration）
IEC 60942 Class2
ANSI SI.40-1984
Frequency:1 KHz
114dB
94dB
OFF
Power ON
SOUND LEVEL CALIBRATO R
Low Battery
HOLD
MI N
MA X
dBA
audio
source
*Please use 94dB@1KHz standard sound source
1.Carefully plug the microphone head in ½ inch hole of
standard sound source (94dB@1KHz);
2.Turn on the power switch of standard sound source(94
dB@1KHz), use straight screwdriver to adjust potenti-
ometer located in the opening hole within the machine
stick, and make LCD display 94.0(referring to Figure 1).
*The meter has been adjusted properly; the recommen-
ded calibration interval is one year.
Do not adjust the potentiometer if there is no audio
source.(This instrument does not come with sound
source calibrator.)
HOLD
MI N
MA X
⑦
③
⑤
②
①
④
⑧
⑥
⑨
Figure 2
C. Name of Each Component (referring to Figure 2)
①.Power switch/Backlight
power button
②.Maximum/Minimum
locking key
③.Measurement data
hold key
④.LCD display
⑤.Electric condenser
microphone
⑥.Wind-resistant ball
⑦.Calibration knob
⑧.Machine stick
⑨.Battery door
Figure3
dBA
HOLD MIN MAX
⑤
③②①
④
⑦
⑧
⑥
D. LCD Display (referring to Figure 3)
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3. Read the sound level:
Press the power button“ ”, after the 1s full screen of
LCD panel,instantly display the sound level value of the
current environmental noise, the value changes accor-
ding to the magnitude of the environmental noise.
4. Lock the minimum sound level value:
Press “ ”, enter “MIN” measuring mode;the current
value will be locked until the minimum value appears
and replaces the current value.
5. Lock the maximum sound level value:
Press “ ” again, enter “MAX” measuring mode,the
current value will be locked until the maximum value
appears and replaces the current value, press “ ”
again, return to measuring mode.
6. Measuring data retention:
Press “ ”, the current measuring value will be
locked, press“ ” again, quit the lock.
7. LCD backlight operating:
Momentarily press “ ”, LCD backlight is on, press
“ ”momentarily again, LCD backlight is off.
8. Shutoff:
The meter will automatically power off by default for 10
minutes without any operation, or press “ ” for two
seconds, the meter will be turned off by manual,press
“ ” for three seconds when the meter is power-on,
the LCD displays“UOF”, the meter just can be turned
off by manual other than automatic power-off.
9. Backlight alarming setting:
1). After turning on, press Hold key until the character
HOLD displays on LCD.
2). Press the key for about 2 seconds to turnoff the
device. When the dBA disappears at the right bott-
om of the LCD, the alarmingsetting interface is ready
for operation.
3).Pressing the key Min/Max and key Hold is todecre-
ase or increase the value of alarming.
4).Pressing the on/off key is to save thealarming value
①.Battery power prompt sign.
②.Bluetooth( Bluetooth version only ).
③.OVER warning sign/reading exceeding measuring
range.
④.Data retention.
⑤.Minimum value.
⑥.Maximum value.
⑦.Sound level reading value
⑧.Sound level unit of (A weighting)
1. Open the battery cover, put 3 AAA size batteries of
1.5V, (see Figure4).
2. Close the battery cover.
set, and the measuring mode resorted. If the current
value isbeyond the setting the backlight flashes.
10. Bluetooth function (App is just for the Bluetooth
version only):
After turning on the meter, long press HOLD button
for about 2s to turn on/off Bluetooth. When Bluetooth
is on, icon of Bluetooth appears on the screen. At this
time, sound level meter can be connected with APP,
which transmit real-time measured and recorded
noise value in the meter to mobile phone.
11. Recording function (App is just for the Bluetooth ver-
sion only):
After turning on the meter, long press MAX/MIN button
for about 2s to turn on/off recording function. When
recording function is on, db characters flashes on the
screen. The meter records one datum every 1s by
default, up to 20,000 items of data can be recorded.
When data record is full, the meter automatically stops
recording and db characters no longer flash. Through
Bluetooth connecti-on, the recorded data can be
uploaded to APP; also you can start or stop recording
through APP.
(bluetooth version only)
IOS version: scan the qr
code to download the
"db-tester" App
(bluetooth version only)
Android version:Please
use BaiDu mobile
assistant to scan the
QRcode to download
"dB-Tester" App
(bluetooth version only)
Android version:Please
scan the QR codeto
download "dB-Tester"
from Google Play.
F. Considerations
1. When the electric power of battery is insufficient,
“ ” symbol may appear on LCD to show that the
electric power of battery is insufficient;the new battery
must be replaced.
2. Please do not use the meter under a high temperature
and humid environment.
3. Please take out the batteries when not in use for a
long time to avoid electrolyte leakage and damaging
the meter.
4. When measuring the noise outside, please mount the
wind-resistant ball on the head of the microphone to
prevent the microphone from being directly blown by
wind and measuring other noise.
Product Maintenance: Regularly wipe the meter with a
dry cloth, please do not use solvent to clean up the
meter.

Ⅲ. Document interface:
Android IOS
1. Click "Edit" button to
delete with multiple
selection.
2. Click data to enter
detailed data interface.
1.Click the "Multiple delete"
button and select delete.
2. Click to enter the data
details interface.
3.The left slider has the
option to delete a single
set of historical data and
share it with a third party.
4.There are two kinds of
historical data: real-time
data and stored data。
（(the data saved on the
home page is displayed
as "real-time data", and
the data saved by the
noise meter on the Setti-
ngs page is displayed as
"storage state").)
Ⅳ.Detailed data interface:
Android IOS
1. Data graph is as shown
in the picture.
2. Button:
Curve: Switch data graph.
List: Switch data list.
Export: Export and save
data in mobile phone in
form of Excel and PDF
1.This page displays the
data as a list and displays
the saved data as a list.
2.MAX/MIN represents the
state of the maximum and
minimum values;"HOLD"
means whether it is in the
"HOLD" state. If yes,that's
the HOLD; If no, just space
Ⅴ. Setting interface:
Android IOS
1. Parameter setting: real-time sampling types, real-time
sampling interval and alarm value setting.
2. Automatic storage operation:
recording interval: time interval of automatic recording.
Number of records: The number of data automatically
recorded.
Start: Start automatic recording.
Stop: Stop automatic recording.
Read: Read automatic recorded data.
Clear: Clear automatic recorded data.
3. File Management: Check Excel and PDF documents
that have been exported to mobile phone.
Note: To view local Files in iOS version, you can enter
"Files" app.
G. Technical Parameters
30~130dBA
±1.5dB
31.5Hz~8KHz
0.1dB
0~40℃，10~80%RH
-10~60℃，0~90%RH
56.1*177*36.03mm
Measuring Range
Accuracy
Frequency Response
Frequency Weighting
Features A Weighting
Working Temperature
and Humidity
Storage Temperature
and Humidity
Resolution
Power Source
3*1.5V AAA Batteries
Weight
96.38g(Excluding Battery )
External Dimension
Specific Declarations:
Our company shall hold no any responisibility resulting
from using output from this product as an direct or
indirect evidence.
We reserves the right to modify product design and
specification without notice.
H. Android and ios“dB-Tester” App Operation Instruction (bluetooth version only)
Ⅰ.Bluetooth connection interface:
Android IOS
1. Click button of Bluetooth icon on the upper left corner
of main interface so that Bluetooth connection window
can pop out.
2. Click on the upper right corner of the window to search
for Bluetooth devices.The search time is 5s.
3. Click on the device you need to connect.
Ⅱ. Main interface:
Android IOS
1. Button: click and Bluetooth connection window
pops out.
2. Button:
Save: Save real-time data.
Clear: Clear real-time data.
Settings: Enter setting interface.
3. Button: Enter document interface.
4. Start button: Start real-time data sampling.
5. The upper half of interface displays real-time noise
value.
6. The lower half of interface displays real-time noise
value chart.
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Any queries,kindly contact us feel free.
Contact Email: [email protected]
Tel: [phone](Wechat&WhatsApp)
Skype: raymondzheng2014