SOUND LEVEL METER
This Sound level meter is small in size,
light in weight, easy to carry. Although
complex and advanced, it is convenient to
use and operate. Its ruggedness will allow
many years of use if proper operating
techniques are followed. Please read the
following instructions carefully and
always keep this manual within easy
reach.
MULTIFUNCTIONAL
1. FEATURES
"
Compatible with standards of IEC 651 Type 2,
ANSI 1.4 Type 2.
"
Widely used to test the sound level of
environment, machinery, vehicle, ship and
other noise.
"
Multifunctional. It offers 4 measurement
parameters: Lp (sound level), Leq (Equivalent
Continuous A Sound Level), Lmax (Maximum
Sound Level) and L
N
(Percent of all readings
over alarm value set).
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With alarm set and alarm output.
"
This meter permits choice of 'A', 'C', or 'Flat'
weighting and 'Slow' / 'Fast' response times.
"
DC output: 0~1.3V10mV/dB.
"
Auto range selection and digital display with
no guessing errors.
"
Manual or automatic shut down. The tester
can be switched off by pressing the power
key at any time. On the other hand, The tester
can be set to auto power off between 1 to 9
minutes or disable auto power off.
"
The tester can memorize 30 groups of
m e a s u r e m e n t r e s u l t s a n d m e a s u r i n g
conditions for later use or download to PC.
"
Can communicate with PC computer for
statistics, printing and analysing by the
optional cable and the software for RS232C
interface.
1
Can only be shut down manually in such a case.
9.CALIBRATION
The standard method to calibrate the meter
requires an external ND9 calibrator in addition
to a small screw-driver.
9.1 Calibrate the meter by the ND9
a. Turn the meter ON
b. Put the meter in the 'A' weighting mode
c. Put the meter in the 'SLOW' response
mode
d. Place the microphone into the calibrator.
Turn the calibrator ON.
e. Adjust the meter's CAL potentiometer so
that the meter's display matches the output
of the calibrator.
9.2 Calibrate the meter by the built in signal
To enter the calibration state, just switch on
the meter, depress the key till the icon
"CAL" is on the display. Then use a screw-
driver to adjust the meter's CAL
potentiometer so that the meter displays
94dB.
10. CONSIDERATIONS
10.1 Wind blowing across the microphone
increases the noise measurement. Use the
supplied windscreen to cover the microphone
when applicable.
10.2 Do not attempt to dismantle the meter
yourself. There are no user-serviceable parts
8
FUNCTION
