WINTACT WT85 Instruction Manual

WT85
WT85B
Sound Level Meter
Instruction manual
WT85B
WT85
Sound Level Meter
Sound Level Meter
(bluetooth version only) (bluetooth version only)
IOS version: scan the qr Android version:Please
code to download the use BaiDu mobile
"db-tester" App assistant to scan the
QRcode to download
"dB-Tester" App
Attention: Db-tester App only supports android 5.0 and iOS 9.0 or above
Version：WT85/WT85B-EN-00
1
D. LCD Display (referring to Figure 3)
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 ② ③
④
HOLD MIN MAX
⑤
⑦
dBA
Figure3
E. Operating Instructions
1. Open the battery cover, put 3 AAA size batteries of
1.5V, (see Figure4).
2. Close the battery cover.
Figure4
4
A. Introduction
The appearance design of digital sound level meter
(Bluetooth type)
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.
B. Calibration Method
*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).
(bluetooth version only) *The meter has been adjusted properly; the recommen-
Android version:Please
scan the QR codeto
ded calibration interval is one year.
download "dB-Tester"
from Google Play.
Do not adjust the potentiometer if there is no audio
source.(This instrument does not come with sound
source calibrator.)
3. Read the sound level:
Press the power button"
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 "
value will be locked until the minimum value appears
and replaces the current value.
5. Lock the maximum sound level value:
Press "
current value will be locked until the maximum value
appears and replaces the current value, press "
again, return to measuring mode.
⑥
6. Measuring data retention:
Press "
locked, press"
7. LCD backlight operating:
Momentarily press "
" "momentarily again, LCD backlight is off.
⑧
8. Shutoff:
The meter will automatically power off by default for 10
minutes without any operation, or press "
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
2
", after the 1s full screen of
", enter "MIN" measuring mode;the current
" again, enter "MAX" measuring mode,the
", the current measuring value will be
" again, quit the lock.
", LCD backlight is on, press
" for two
5
Figure 1（Diagram of audio source calibration）
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
④
②
MIN
HOLD
MAX
①
Figure 2
3
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.
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.
6
audio
source
dBA
MIN
HOLD
MAX
⑤.Electric condenser
microphone
⑥.Wind-resistant ball
⑦.Calibration knob
⑧.Machine stick
⑨.Battery door
⑥
⑧ ⑦
③
⑨