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Ammeter: The ammeter indicates the measured amount of amperes being drawn by the
battery. When you rst start charging a battery, the reading will be high with the needle
near 10 using the 10 Amp charge rate. As the battery charges, the needle will fall to about
4 to 5 Amps, indicating a charged battery in the manual setting.
In automatic setting, when the battery is charged, the ammeter will go to zero and then
will pulse frequently to monitor the battery. At the 2 Amp charging rate, you will see little
needle movement.
The percent of charge scale is intended as a visual aid to help simplify reading the state of
charge of the battery. The meter is scaled for use with the 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 size and battery type.
PS-1275MA
POWER ONFULL CHARGE
CHARGE % 100 75 50 25 0
FULLY DISCHARGED BATTERY
Initial charge current to the battery is typically 10
amps. The needle points toward the 25% mark.
POWER ONFULL CHARGE
CHARGE % 100 75 50 25 0
APPROACHES FULL CHARGE
Charge current to the battery is typically 5 amps.
The needle points toward the 100% mark.
POWER ONFULL CHARGE
CHARGE % 100 75 50 25 0
FULLY CHARGED BATTERY
Charge current to the battery is 0 amps. And, the
Full Chargegreen LED glows. The needle points
toward the Full Charge LED.
PS-2100MA
The meter indicates the amount of current measured in amperes that is being drawn from
the charger by a battery. In the 15 Amp charge rate, a typical discharged battery may initially
draw more than 15 Amps during the rst few minutes of charge. As the battery continues
to charge, the current should gradually taper to within 6 to 8 Amp at full charge.
When the battery has reached Full Charge, the LED indicator will glow green. The red
LED indicator will glow red if the clamps are incorrectly connected to the battery terminals.
When charging a 6 volt battery, the LED will light before the battery is fully charged. Monitor
the meter and stop charging when the meter indicates around 7–8 amps.
The START area of the meter is reserved to indicate when a high rate of current is being drawn
from the charger. It is normal for the meter pointer to be in this area while cranking a vehicle.
When using the 2 Amp charge rate, the meter may indicate some activity but doesn’t
have the resolution to accurately display the battery’s state of charge. For this reason,
you should depend on the full charge light indicator.