Battery Charger Controls - Schumacher PS-1025 Instruction Manual

E.
CHARGE RATE AND VOLTAGE SWITCH SETTINGS
NOTE: It is important to determine the battery type before charg-
ing. (See BATTERY TYPES)
WARNING: This charger will continue to charge even after the
battery is charged.
This is a manual (non-automatic) battery charger. A manual
charger will continue to charge and will not shut off. You must
keep a visual check on the ammeter to determine when the bat-
tery is charged.
WARNING: Overcharging will damage the battery.
2 Amp Charge Rate – All Models
For small 12 volt batteries (31 ampere hours or less) use only
the 2 amp charge rate. The smaller the battery, the greater the
risk of harming it by using a higher charge rate. The 2 amp
charge rate may also be used to warm or trickle charge larger
batteries.
6 Amp Charge Rate (PS-620 Only)
Use the 6 Amp charge rate for faster charging of larger 12 volt
batteries.
10 Amp Charge Rate (PS-1025 Only)
Use the 10 amp charge rate for faster charging of larger 12 volt
batteries.
F.
0
AMMETER (See FIGURE 4)
The ammeter gives a reading of the current drawn by the battery
from the charger. When a fully discharged battery is connected
to the charger, the ammeter will read the maximum output rating
of the charger, 2, 6, or 10 Amps, depending on the charge rate
selected. The charge current will gradually taper down as the
battery approaches full charge. As the charge current tapers
down, the ammeter needle will move left.
PERCENT OF CHARGE
The percent of charge scale is intended as a visual aid to help
simplify reading the state of charge. It is scaled for use with the
6 or 10 amp charge rate only. For the 2 amp charge rate, use the
red triangle. The percent of charge is based on current drawn by
the battery. For this reason, accuracy will vary with the size and

BATTERY CHARGER CONTROLS

READING AMMETER
2 4 6 8
PS-620
FIGURE 4: METERS
PS-620
CHARGE RATE SELECTOR
2 AMP OFF 6 AMP
FIGURE 3: BATTERY CHARGE RATE SELECTORS
50 Amp Engine Start (PS-1025 Only)
Select "50 Amp Start" to assist in engine cranking of 12 volt sys-
tems. DO NOT use on 6 volt systems. Use the 50 amp engine
start position for cranking automobiles or light trucks. Do not
crank engine if battery is not in the vehicle. This will reduce the
chance of damaging sensitive electronic equipment in the ve-
hicle.
IMPORTANT: Very low/depleted batteries may need to be
charged at 10 Amps for 15–20 minutes before switching to En-
gine Start.
0 2 4 6
PS-1025
battery type. Typically a 28 ampere hour gel cell battery will draw
less current at the end of charge then a 140 ampere hour wet
cell battery. This means that the indication for a fully charged
large battery may be slightly less than 100%.
For the 2 amp charge rate, a red triangle has been provided
within the green area of the meter scale. It's accuracy has been
calibrated for use with small batteries. As a battery takes on a
charge, it draws less current from the charger. Correspondingly
less of the red area will fall under the meter needle.
3
PS-1025
CHARGE RATE SELECTOR
2 AMP 10 AMP 50 AMP
START
8 10 50