Pro-User DFC900N Utilisation page 4

battery in perfect condition when it is not in use. The charger can be connected
for months keeping the batteries fresh.(Please refer to pic 2)
LED display
The unit is built-in with LED display for showing charger status:
REVERSE – RED LED – DC clamps are connected in reverse polarity.
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FAULT - RED LED – Battery Fault.
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POWER - YELLOW LED – The charger is connected to mains power.
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CHARGING – AMBER LED – The charger is charging to the battery.
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FULL - GREEN LED – The battery is fully charged and the charger is in maintenance
•
mode.
Temperature Compensation
A sensor will automatically adjust the charging voltage if the temperature deviates from
– 20°C to +45°C. A high temperature environment will lower the voltage and freezing
condition is handled by higher voltage. A low temperature heightens the output voltage,
and hot condition is handled by lower voltage.
Voltage compensation
Because of some voltage drop in the cables, the actual voltage at the clamps of the battery
can be lower than the charger output voltage. A special circuitry inside the unit will monitor
the true input voltage to the battery and adjust the output voltage of the unit accordingly.
This will maximize the charging efficiency.
Reverse-polarity protection
This unit offers reverse-polarity protection, the RED "REVERSE" LED will illuminate and the
charging process will not start. If this happens, unplug immediately from mains, connect
the red crocodile clip to positive (+) battery post, and black crocodile clip to negative (-)
post, then plug into the mains power and the charging process will start.
Short-circuit protection
Should you accidentally touch the crocodile clips together whilst the mains power is on, the
unit will not perform charging. Unplug from mains, disconnect and start the process again
being careful not to touch the clips together.
Cable connector
The DFC900N has two options for
connecting the unit to the battery.
Via the intelligent cable connector
you can select which connection
you want to use:
Crocodile clamps for easy and flexible use.
•
O-ring connectors for permanent fixation on your battery. （A protection plastic end cap
•
is provided, please cover the connector when it is not in use.）
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