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Integrating Sound Level Meter
6
DC Signal
AC Signal
Ground
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MAX/MIN
button:
Press the button to enter the maximum and minimum recording mode.
Under this mode, the maximum and minimum value will be stored and
automatically updated in the memory simultaneously.
Pressing the button will display the “ ” symbol and the maximum
value on the display. Pressing button again will display the “ ”
symbol indicator and the minimum value on the display.
Pressing the button again will cause the maximum and minimum
indicators to blink together, which means the meter is under maximum and
minimum recording mode. The value displays on the screen is the present
value.
To exit the maximum and minimum mode, press and hold button until
the “ ” symbol is disappeared.
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9
Back light button:
Press it to turn on the LCD backlight, which is making it easier to read in the
dark environment.
Press it again to turn off backlight. The backlight will turn itself off automatically
after 30 seconds.
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A/C button:
Press the button to set the frequency weighting to A or C.
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Start/Pause/Stop button:
Press the button to set the Leq measurement to continuance, pause or stop.
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Microphone:
1/2 inch electret condenser microphone.
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USB Interface:
Connect to a computer or external power supply input.
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AC/DC signal output jack:
Connect the AC/DC output on the bottom of the unit to the level recorder.
AC: 1 Vrms Corresponding to 130dB. ( with frequency weighting )
DC: Output: 10mV/dB