A. Introduction 2.

Insert the microphone carefully into the 1/2 inch hole

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

Figure1

C. Calibration Procedures:
Please use a Standard Acoustic Calibrator.
1. Make the following settings:
Version, 1358-EN-02 Equivalent weight: A Time weight: FAST
Level range: 60 to 110 dB
Measurement mode: MAX function disable
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