BSWA 308/309 BSWA Technology Co., Ltd
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Disk Mode. Note that the MicroSD card provides with the sound level meter has already
formatted before sale.
★Note: Keep front side (with silk screen) of MicroSD card down to insert without
hot-plug.
RS-232:
It can be use as standard RS-232 port at Remote mode, and also can be used to
connect thermal printer as Printer mode. Refer to 4.6.3 Printer and 5. RS-232
Communication Protocol to earn more detail.
TRIGGER:
Trigger input interface using a standard 3.5mm headphone jack. Refer to 4.4.4 Trigger to
earn more detail.
DC OUT:
DC output interface using a standard 3.5mm headphone jack. Refer to 4.6.2 DC OUT to
earn more detail.
AC OUT:
AC output interface using a standard 3.5mm headphone jack. Refer to 4.6.1 AC OUT to
earn more detail.
2.5 Battery
Recommend to use 4 cell of alkaline battery (LR6/AA/AM3), paying attention to the battery
polarity (+/-) marked in the battery compartment. Do not mix using of old and new batteries at
the same time. Remove batteries when the device is not in use. The total voltage of 4 cell
battery cannot exceed 14V, otherwise it will damage the sound level meter.
The real test shows that the 4 cell of alkaline battery can support sustainable use of
approx.10 hours (depends on battery) for sound level meter. When use rechargeable battery
Eneloop BK-3HCCA/4BC (Rated capacity 2450mAh), sound level meter can work about 12
hours continuously. When the battery voltage is lower than the minimum voltage requirement
of the sound level meter, it will shut down automatically.
We recommend using external power supply or USB-power-bank rather than batteries for
long time running.
Follow the figure below to install or replace the battery:
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