Truecharge 10TB Owner’s Manual

5.0 Operation

5.1 Automatic Charging Sequence

1.When AC power is first switched on, an initialization procedure begins. The microprocessor checks for excessive voltage at the battery. It then checks to ensure the internal charger temperature is not greater than 175°F (80°C). If both these conditions are met, and the battery voltage is lower than the “absorption” voltage (see step 4), the Truecharge begins “bulk” charging, delivering a full charge to the battery or batteries. During this charging phase, the majority, or bulk of the charge is returned to the battery.

2.After approximately 10 seconds, the microprocessor rechecks battery voltage, to determine if the battery is responding to being charged. If the battery is not responding, charging is terminated and the initialization procedure in step 1 is restarted.

3.If the battery is responding, bulk charging at a full 10 amps continues until the battery voltage rises to just below the point where destructive battery “gassing” can begin. When this threshold is reached, typically 14.2 to 14.4 volts, depending on battery type and position of the battery selector switch, the Truecharge enters its absorption charge mode.

4.When the battery voltage under full bulk charge approaches the point where battery “gassing” can begin, the Truecharge switches over to “absorption” mode. During this final charging phase, current is progressively reduced to hold the battery voltage absolutely constant at 14.2 to 14.4 volts (depending on battery type selected).

5.When charging current drops below 1 amp, this signals that the battery is fully charged. If a Gel or AGM battery type is being charged, the Truecharge now switches immediately into its “float” charge mode. If the battery being charged is a Flooded type, the Truecharge continues the absorption charge mode for one additional hour, then switches into float charge mode.

6.Once in float charge mode, the Truecharge reduces its charging voltage to the precision-controlled “float” voltage value. This maintains the battery indefinitely at 100% charge, yet creates negligible gassing or electrolyte loss.

7.If the microprocessor detects the charger has been in absorption mode for more than 8 hours, it automatically switches into float mode. This feature protects the battery against situations where a light load connected to the battery prevents the charger current from dropping

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