Product Manual

8
This charger features user selectable 2 or 3 stage charging. The charging prole is selected by
moving the slide switch on the front panel left to 3 stage or right for 2 stage charging.
100%
75%
50%
25%
0%
Bulk
(Constant Current)
Float
(Constant Volts)
Time
Two Stage Charge
Volts
Amps
2 or 3 Stage Charging
Operation
Prior to turning on the unit, you must decide on which charging prole, 2 or 3 stage charging,
to use. To help you decide, please see the following section entitled 2 or 3 Stage Charging
to determine the charging prole.
Once you have decided on the charging prole you must set the switch to the correct posi-
tion. The switch is located to the right of the output terminal on the front panel. Set the
switch to the correct position as shown on the label.
To turn the unit on, simply move the power switch to the ON position. The alarm buzzer will
sound and the Low Output LED will come on briey, and then the green OUTPUT ON LED will
illuminate.
When the unit is rst turned on, it will charge the batteries at maximum current and the
charging light will be on. After a period of time which may be minutes to hours, the batter-
ies will reach the absorption voltage (3-stage) or oat voltage (2-stage), and the charging
current will reduce as necessary to maintain the batteries at that voltage. Once the charging
current has dropped to a low level (about 10% of the charging current rating), the charging
light will go off, and if set to 3-stage charging the voltage will drop to the oat level. You
may check this voltage at the output terminals of the unit with a good digital voltmeter. As
shipped from the factory, the unit is preset for a oat voltage of 13.6, 27.2 or 36.3 VDC,
which is generally recommended for lead-acid batteries. The output adjust potentiometer
is located to the right of the 2 stage / 3 stage select switch. If you wish to adjust this
voltage, reach in with a very small at blade screwdriver to rotate the potentiometer. Please
Note that this adjusts both the oat and absorption voltages at the same time. Clockwise
increases the output voltage, and counter clockwise decreases it. It is advisable to check
with the battery manufacturer before changing the oat voltage.