Center 390, Instruction Manual, Page: 7 / 20

Sound Level Meter
5
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1
Power button:
Press the button to turn the unit on. To turn the unit off, press and hold
button down until the “
P-OFF “ is shown.
ƒ
Auto Power Off.
To save battery life, by default, when the unit is powered on, it is under auto
power off mode.
The unit will power itself off after 30 minutes if no key operation.
Auto power off will be disable under the following 2 circumstances.
(1) When connecting to PC.
(2) When recording function is on process.
ƒ
Disabled Auto Power Off.
Press and hold the button and then power on the unit. Keep holding
button, until the meter starts function. Make sure the auto power off
symbol disappears from display screen.
Note: When the user powers it on, the LCD will show how much internal
memory space is available to use.
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2
RECALL button:
Serves to recall data from the manual store.
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3
REC button:
When press the button, the unit will start recording, and the “ ”symbol
display. To stop recording press again button.
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4
MEM button:
Press to store measurement data using manual store.
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5
/ button:
Press or to increase or decrease number.
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6
CLOCK button:
(1) Press the button to turn Date and Time display ON or OFF.
(2) Press and hold button at least 2 seconds Setting the Date and
Time.
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7
INTV button:
Adjust auto store Interval time.