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
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