Digital Sound Level Meter
Operation manual
Version, 1358-EN-02
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A. Introduction
This equipment has been designed to meet the meas
urement requirement of Safety Engineers, Health, Indu
strial Safety offices and Sound Quality control in various
environment, which include factory, office, traffic, family,
and audio system.
This equipment has the following functions:
1. It is designed according to the IEC651 TYPE2 &
ANSI S1.4 TYPE2
2. Accuracy up to
±
1.5 dB
3. Measurement range: 30-130 dB
4.
Weight A or weight C selection
5. Fast & Slow dynamic characteristic modes.
6. AC and DC output for frequency analyzer level
recorder,
FFT
analyzer, graphic recorder etc.
7.Auto power off
B. Safty Notice
Operation Environmental condition,
1. Below 2000 meters in height,
2. Operation humidity: 10-85%RH
3. Operation temperature: 0-40'C
Maintenence,
- -
- - - - - - - -
-
Use dry cloth to clean
the unit, but never with
any solvent.
C. Calibration Procedures:
Figure1
Please use a Standard Acoustic Calibrator.
1. Make the following settings:
Equivalent weight: A
Time weight: FAST
Level range: 60 to 110 dB
Measurement mode: MAX function disable
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2
.
Insert the microphone carefully into the 1 /2 inch hole
of the Cali
b
rator
.
3
.
Turn on the Calibrator and adjust the Protentiometer
inside the battery compartment of the unit (shown in
the Figure 1 ), until the LCD display the desired Level
94.0dB.
**Our products are all well calibrated before Shipment.
Recommended recalibration cycle:
1
year.
D. Name and functions (Figure 2)
1. Electret Condenser Microphone.
2. LCD Display.
3. Power switch
4. Level range control switch:
30dB-80dB, 50dB-100dB, 60dB-110dB,
80dB-130dB; 30-130dB
5. Maximum value hold switch. (MAX)
6. Equivalent weight select switch:
A: A weight for general sound level measurements.
C: C weight for checking the low frequency content
of noise.
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