E. LCD Display (Figure 3)
1). Level range.
2). Instantaneous sound pressure level.
3). Low battery mark.
4). Maximum value is held during measuring.
5). Measuring value.
6). Measurement Unit.
7). Frequency weighting A/C.
8). Level range Bar graph.
9). Rang over.
10). Slow time weighting.
11). Fast time weighting.
12). Range under.
F. Pre-Operations:
1. Open the battery door and install 4pieces battery
into the battery compartment.
2. Cover the battery door.
3. When battery voltage drops below the operating
voltage, mark “ “ appears, Please replaced
with a new 9V battery. (Figure 4)
4. When the DC adapter is used, insert plug (3.5
)
of the adapter into the DC 6V connector
G. Operation
H. Caution
I. Specification
Measuring range
30dBA-130dBA, 35dBC - 130dBC
Accuracy
±1.5 dB ( 94 dB@1KHz )
Frequency range
31.5Hz – 8.5KHz
Linearity range
50dB/100dB
Frequency weighting
A/C
Digital Display
4 digits
Resolution
0.1 dB
Sample rate
2Times/Second
Bar graph
50 dB scale at 1 dB step for monitoring
current sound pressure level display Sample
rate: 20Times/Second
Over Indication
OVER/UNDER
AC Output
0.707 Vrms at FS outputimpendance
approx 600 ohm
DC Output
10 mV / dB output impedance approx 100
Time Weight
FAST/SLOW
Microphone
½ Inch Electric Condenser Microphone
Max Hold
MAX
Power supply
4*AA 1.5V alkaline cells or DC 6V
100mA (Maximum DC 9V)
Battery Life
About 30hours (Alkaline Battery)
Self Calibration Time
3Second
Operating Condition
0~40 10~80%RH
Storage condition:
-10~60 10~70%RH
Weight
308g (including battery)
Dimension
256x70x35mm
MADE
IN
CHINA
(Page 5)
(Page 6)
(Page 4)
1. Turn on the unit
2. Standard the desired measuring range until the LCD
not display “
Under
” or “
Over
“
3. If measure general noise sound level, please
selected dBA.
4. If the sound source consists of the shot brusts of only
catching sound peak, set response to FAST.
To measure average sound level, use the slow time
weight.
5. When MAX mode is chosen. The instrument
captures and hold the maximum noise level.
1. Do not operate the unit at high temperature 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 must to mount the windscreen to not
pick up undesired signals.
4. Below 200 feet in Height, Humidity 80%RH,
Temperature from 0 to 40 .
8. AC output terminal: 0.707 Vrms Corresponding
to each range step.
9. DC out put terminal: output 10 mV/ dB
10. Calibration control
11. External DC 6V power supply terminal.
12. Tripod
mounting
screw.
13. Windscreen.
Figure 4
Figure 3
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