11
If the battery is charged and/or the battery's terminal voltage drops below 12.9 V the char-
ger starts a charge pulse of 5A until the terminal voltage has reached the set level, 14.4
V or 14.7 V. The charge pulse is then interrupted and the cycle is repeated as long as the
charger is in pulse maintenance phase. Pulse maintenance phase is indicated by lamp 4.
If the terminal voltage drops below 12.1 V, the charger automatically reverts to the begin-
ning of the charging curve.
Setting : Supply 13.6 V
MULTI US 7000 has a Supply mode setting which has a constant voltage at 13.6 V and
current up to 7 A. It could be used for maintenance charge using the Float approach. This
approach
keeps the battery at 100 % State of Charge, but the constant small
overcharge
also increases water loss. Note that there is no need for a battery to be connected at this
mode.
Note: The Spark protection system and the indication of Reverse Polarity is
suppressed in this mode. The Short Circuit protection is still working.
It is not advisable to charge a discharged battery in Supply mode as this will not provide a
complete charge. In this mode, MULTI US 7000 can also be used as a power-generation
unit for operating equipment that requires 13.6 V and a maximum of 7 A. If the selected
current exceeds 7 A, the output voltage will drop at an increasing rate. The charger has
electronic overload protection in this mode, which is activated if the charge is so great that
the output voltage from the charger falls below around 3.5 V and the current to around
7 A. In the event of an overload, the charger transfers to error mode (lamp 0).
Setting lamp D indication lamp 5.
Setting: Recond 16 V / 1.5 A / 4 h
MULTI US 7000 has a Recond-setting which gives a constant current at 1.5 A, maximised
at 16 V for 4 hours. It will automatically go over to 14.4 V pulse setting after a completed
cycle. This mode is used for batteries that have been deep discharged. Start by charging
at either the 14.4 V or 14.7 V setting until the battery is in Pulse maintenance phase. Set-
ting lamp E indication lamp 6.
