Sutron Corporation 8310 & 7310 Users Manual 8800-1125Rev. 2.7 (BETA) 4/16/2014 pg. 22
input. If using a DC supply as the charging source, a 15V supply is recommended. On the 8310,
connect the charging voltage to the two pins labeled SOLAR GND (C1) and POS (C2). This voltage
passes through an internal temperature compensated regulator that keeps a sealed 12V lead
acid battery fully charged. The internal regulator is designed to handle up to a 20W solar panel.
Note: The 8310 is designed to always run with a battery connected. It may not run properly if
you try to operate it from the solar panel input alone if the system load exceeds the regulator’s
output capability as would happen when transmitting.
Quick Test
The 8310 is running whenever the battery is connected. To verify that the 8310 is running, press
a key on the front panel. The 8310 display should light up and display the station name, date
and time. If not, check your connections. Depending on how your particular unit has been set
up, the display may remain on, or turn off after a brief period.
You can also tell the 8310 is running by watching the Status LED. In normal operations, the
green LED will flash periodically as the 8310 operates. If the green LED is not flashing or if the
red LED is on, the 8310 may not be operating properly.
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