User Manual

26
Lead Sulfate—A compound that results
from the chemical action of sulfuric acid
on oxides of lead within a battery cell.
Pages
7, 11, 15, 24.
MF—Maintenance-Free, VRLA sealed
absorbed glass mat battery and AGM are
all the same type of battery and do not
have fi ll caps, nor do they need to be
fi lled with water. Page
8.
Milliampere—One thousandth of an
ampere or amp.
Modifi ed Constant Voltage
Charge—A charge in which charging
voltage is held constant while a fi xed
resistance is inserted in the battery
charging circuit causing a rising voltage
as charging progresses.
Negative Plate—The grid and active
material that current fl ows to from
the external circuit when a battery is
discharging. Pages
6, 8, 11.
Negative Terminal—The battery
terminal from which current fl ows
through an external circuit to the
positive terminal when a battery
discharges. Pages
6, 22.
Open Circuit Voltage—The voltage at
a battery’s terminals when no current is
fl owing. Pages
10, 12, 13, 18, 22.
Positive Terminal—The battery
terminal that current fl ows toward in
an external circuit when the battery is
discharging. Pages
6, 22.
Rated Capacity—Amp hours of
discharge that can be removed from
a fully-charged battery at a specifi c,
constant discharge rate. Page
10.
Self-Discharge—Gradual loss of
electrical energy when a battery is
stored. Pages
8, 9, 11, 23.
Sponge Lead—A porous mass of
lead crystals and the chief material
contained in a fully-charged negative
battery plate. Page
6.
Standard Battery—Any
conventional, YuMicron or YuMicron
CX battery.
State-of-Charge—The amount of
electrical energy contained in a battery.
Pages
7, 11, 12, 15, 20.
Sulfation—Formation of lead sulfate
on a battery’s plates as a result of
discharge. Pages
7, 11, 21, 24.
Sulfuric Acid—The principal acid
compound of sulfur, sulfuric acid in
diluted form is the electrolyte of a lead
acid battery. Pages
6, 7, 11, 12, 16.
Trickle Charge—A low-rate continuous
charge approximately equal to a
battery’s internal losses and capable of
maintaining a battery in a fully-charged
state. Page
15.
Vent Plug or Vent Cap—The seal for
the vent and fi lling well of a cell cover
or a small hole for the escape of gases.
Pages
7, 18.
Volt—The unit of measure of
electromotive force or the electrical
pressure of a circuit or battery.
Pages
6, 9, 10, 12, 13, 15, 21, 22.
Voltage—The difference in electrical
potential that exists between the
terminals of a battery or any two points in
an electrical circuit. Pages
20, 21, 22.
Voltmeter—Instrument used for
measuring voltage. Pages
20, 21, 22, 24.
VRLA—Valve Regulated Lead Acid. Sealed
batteries which feature a safety valve
vent system designed to release excessive
internal pressure while maintaining
suffi cient pressure for recombination
of oxygen and hydrogen into water.
VRLA and AGM refer to the same type of
battery design. Pages
8, 17.