OPTIMIZER
TM
SX100-1
User’s
Manual
Xenotronix/TLI
5
Rest Stage (heavy-cyclic mode only)
After the equalize charge, the charger will enter a rest period for 1 hour before entering
float charge stage. During the rest period, the charger will indicate that the battery is
ready for use.
Float Charge Stage
During float charge, the voltage is regulated at a lower rate and the battery draws
whatever current is required to replace its standing losses. To maximize battery life, a
negative charge temperature coefficient of approximately 3.5mV per cell per °C variation
from 25°C is used. A precision temperature sensor monitors the temperature and as the
temperature increases the float voltage is reduced, and vise-versa. The minimum charge
voltage is limited to 13.2 volts during very warm conditions. Temperature compensation
helps offset the impact of high temperatures on the float life of the battery. To help your
battery keep its full capacity, we recommend the battery be left connected to the charger
in float charge mode until ready to use. This will prevent chronic undercharging, a
leading cause of premature battery failure. The float charge is low enough to prevent
overcharging, but high enough to allow the battery to replace its standing losses and
maintain a 100% state of charge. The battery may be left connected to the charger
indefinitely, in float charge mode, without danger of overcharging.
Battery Disconnect
At anytime during the charge or fault modes (except charger fault), if the battery is
disconnected the charger will reset the charge cycle and wait for a new battery to be
attached. For best performance, the battery should not be disconnected before entering
the ready mode. If it is necessary to pull a battery off of charge early, if possible wait for
the charger to enter the absorption mode. Repeatedly ending the charge early will lead to
premature battery failure very quickly due to chronic undercharging.
Attaching Loads to the Battery during Charge
When using parallel loads, allow the charger to cycle to ready before attaching the load.
This will ensure that the proportional timing charge algorithm fully charges the battery. If
heavy loads are attached to the battery during charge, the charger may not properly cycle
out of the charge modes and may indicate a battery fault and turn off the charger. Light
loads will have little effect other than robbing charge current and lengthening the charge
cycle. During the float charge, if the parallel load causes the charger to deliver its full
current, the charge indicator will light in addition to the ready light. In this condition, the
battery is not being charged and is probably being discharged. This is OK as long as time
is provided at a reduced load for the charger to replace the current drawn from the
battery. Heavy loads permanently attached during float charge will cause the charger to
warm and may affect the temperature reading and depress the float charge voltage. Use a
larger charger with heavier loads.
Charger / Battery Fault Indications
Charger and battery faults are indicated by quickly and alternately flashing the charge
and ready indicators. A charger fault occurs when the charger output is on when it should
be turned off. A charger fault is permanent. To confirm a charger fault, with no battery
