BSWA 308/309 BSWA Technology Co., Ltd
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4.4.2 Backlight
Sound level meter provide the auto turn off function of
backlight to reduce the power consume and extend battery life.
Menu of Backlight can set the backlight timeout on-off and
delay time. Press <▲>, <▼> can choose and select.
4.4.3 Battery
Menu of Battery display the
power state and power voltage.
The discharge cut-off voltage of
single cell LR6/AA/AM3 alkaline
battery is approx. 0.9V, therefore
sound level meter will power off
automatically when the total voltage of 4 cell alkaline battery falls below 3.6V.
4.4.4 Trigger
Menu of Trigger can set the function of trigger on-off. Trigger
is an analog input which remote control the sound level meter
to start or stop the measurement. The trigger input located on
the bottom of sound level meter as a 3.5mm connector.
Short the signal lines and ground to trigger measurement to start, otherwise to stop the
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