Digital sound level meter
Operation manual
A Precautions：
Please read this operation manual carefully before
using this equipm ent for correct operations. T his equipm ent
have been designed to m eet the m easur em ent requirem ent of
Safety Engineers, Health, Industrial Safety offices and Sound
Quality control in various environment.
BFeatures:
1 ） T his unit was designed according to the IEC651
T YPE2& A NSI S1.4 T YPE2 for sound level m eters.
2）Instantaneous sound m easure function.
3）Measurement range: 30-130 decibel
4）With two equivalent weighted sound pressure levels,
AandC.
5）Fast & Slow dynamic characteristic modes.
6）A C and DC signed output for frequency analyzer level
recorder, FFT analyzer, graphic recorder etc.
C Specifications:
1）Accuracy: ±1.5 dB (under reference conditions)
2）Frequency range: 31.5 Hz~ 8.5K Hz
3）Linearity range: 50 dB
4）Measuring level: 30~130 dBA, 30~130 dBC
5）Fr equency weighting: A , C
6）Digital display: 5 digits
Re so luti o n：0.1dB
Display：0.5 secretary
7）Bar graph: 50 dB scale at 1 dB step for monitoring
current sound pressure level display period: 50 m S
8）evel ranges：30-80 dB； 50-100 dB；60-110 dB；
80-130 dB；
9 ） O ver in dicate over range:Un der indicate less t han
lower limit of the range.
10 ） AC output: 0.707 Vrms at FS output impendance
approx 600Ω
11）DC output: 10 mV / dB output im pedance approx 100
Ω
12）Time weighting: Fast / Slow
13 ） Microphone: 1/2 inch Electret Condenser
micro pho ne
14）M ax: M axim um hold
15 ） Power supply: 1*9V alkaline cells or DC 9V
adapter Power life: About 30 hrs (calkaline cells)
16）Self calibration time: 10 sec (every turn on)
17）Operating Tem perature: 0
℃ to 40℃
Operating Humidity: 10% to 80%RH
18）Storage Temperature: -10℃ to 60℃
Storage Humidity:10% to 70%RH
19)Dimensions: 220×67×32mm
20)Weight: approx. 210g(including battery)
D Calibration Procedures:
Please use a Standard A coustic Calibrator.
1） M ak e the following settings:
Display: SPL (dBA ) Tim e
weighting: FAST
Levelrange:60to110dB
M easurem ent m ode: M A X function disable
2）Insert the microphone carefully into the 1/2 inch hole of
the Calibrator.
3) Turn on the Calibrator and adjust the Prote-ntiometer in
back top of the unit (shown in the diagram 1 ). T he level
of the unit (shown in the diagram 1) The level display
will indicate the desired Level (94.0).
Our products are all well calibrated before Shipment.
Recommended recalibration cycle: 1 year.
ENameandFunctions:
1）Windscreen.
2）Electret Condenser M icrophone.
3) LCD Display.
4）Power switch
5）M axim um value hold switch. (M A X )
6）Level range control switch:
30dB~80dB； 50dB~100dB；
60dB~110dB； 80dB~130 dB
7）Time weighting select switch.
Fast: For normal measurements.
Slow: For checking average level of fluctuating noise.
8）Frequency weighting select switch.
A: A weighting for general sound level measurements.
C: C- weighting for checking the low frequency content
of noise.
9）Back L ight Button Switch
10）External DC 9V power supply term inal.
11 ） AC output terminal: 0.707 V rms Corresponding to
each range step.
12）DC out put term inal: output 10 m V / dB
13）Tripod m ounting scr ew
14）Calibration control
15）Battery Door .
F LCD Display Description:
1）Level range.
2）Instantaneous sound pressure level.
3）L ow battery m ark .
4）M axim um value is held during m easuring.
5）M easuring value.
6）Measurement Unit.
7）Fr equency weighting A /C.
8）Level range Bar graph.
9）Ra ng o ve r.
10）Slow tim e weighting.
11）Fast time weighting.
12）R ange under.
GPre-operations:
1）Open battery door and install four 9V batter y in the
battery com partm ent.
2）Install battery door.
3） When the battery voltage drops below the operating
Voltage, m ark appears . Please replaced with new one.
4）When the DC adapter is used, insert the plugs (3.5φ)
of the adapter into the DC 9V connector on the side
panel.
H Operation direction:
1）Tur n o n p o w e r
2 ） Select the desired response and weighting, also
select desired r ang.
3 ） If weighting for general noise sound level, please
select dBA.
4）If the sound source consists of the short brusts of only
catching sound peak , set response to F A ST. to m easuring
average sound level, use the slow setting.
5） When M A X m ode is chosen.T he instrum ent captures
and hold the maximum noise level.
I Cautions
1 ） Do not operate the unit at high tem perature and
Humidity environment.
2）Please take out battery from unit if not in use for any
extended period of time.
3）Once using the unit in the presence of wind, it is a
m ust to m ount the windscreen to not pick up undesired
signals.
4）Operating Environmental conditon:
Hum idity≤80%RH,
Te mp e r a t u r e f ro m 0 ℃ to 40℃.
Above picture and content just for your reference. Please
be subject to the actual products if anything different or
updated. Please pardon for not informing in advance.
CONTACT US
For any problem or concern, welcome to email us for
prompt response.
P.S.
To make sure you
can receive immediate solution
and your requests processed quickly, please email us
with information below:
1. Order Number
2. Platform
of Your Purchase
3. Full Model Number
4. Description of the Problem
(Attaching videos or photos can help us
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