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CIRCUIT-TEST
7.
Backlight button
Press this button to enable the backlight display
for easy readings in dark environments. Press
more than 1 second to disable backlight or wait
and it will automatically turn OFF after 15
seconds.
8.
Power button
Press key for 1sec to turn the sound level meter
ON or OFF. The auto power will be off
automatically after 5 minutes idle time.
9.
REC button
Press the button to start recording data and press
REC again to stop recording.
The minimal interval is 1 second and the
maximum interval time is 7 Hours 59 Minutes 59
Seconds. Total Records: 14.000.
10.
RS-232 Interface Connector
USB Interface Connector
RS-232 interface with a computer.
USB interface with a computer.
11.
Microphone
1/2 inch Electret Condenser microphone.
12.
Battery cover
6
DMS-4420
DMS-4420
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