Longtime LCH-1215A, User Manual

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Section 8: Using the Charger
8 ‐ 1 Charging Characteristic
The charger characteristic is generally designated as a modified IUoU characteristic.
8 ‐ 1 ‐ 1 I Phase (Bulk)
The STATUS LED constantly lights red. In the first stage of the charging process, the depleted
battery is charged with a constant current until the battery voltage reached I phase setting voltage
(13.5V / 13.8V or 27.0V / 27.6V). When the battery reaches this voltage level, the charging current
gradually drops. When the current drops down to 80%, the charger switches over to Uo phase
setting voltage (14.0V / 28.0V or 14.4V / 14.8V or 28.8V / 29.6V). Typically the battery is charged to
70% ~ 80% of its capacity.
8 ‐ 1 ‐ 2 Uo Phase (Absorption)
The STATUS LED constantly lights orange. This main charging phase could be set to the maximum of
4 / 6 / 8 hours or unlimited, and the current rises again to its maximum value. The current remains
constant as long as the battery voltage is below Uo phase setting voltage (14.0V / 28.0V or 14.4V /
14.8V or 28.8V / 29.6V). After reaching the setting voltage, it remains constant. However, the
current drops again. Within this main charging phase, the battery is charged to 95% of its capacity.
The charging voltage and the period for the main charging phase (Uo phase) can be
selected using the dip switch (S1).
8 ‐ 1 ‐ 3 U Phase (Float)
The STATUS LED constantly lights Green. If the current decreases to 10% or under the rated current
or if the time limit of 4 / 6 / 8 hours is exceeded, then the charger switches over to economy
charging (13.5V/13.8 V or 27.0V/27.6 V).
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