Testing - Taylor-Dunn ET-3000 Manual

T-48 AC / ET 3000

TESTING

•
Explosive mixtures of Hydrogen gas are
present within battery cells at all times. Do
not work with or charge battery in an area
where open flames (including gas furnace
or water heater pilots), sparks, cigarettes,
or any other sources of combustion are
present. Always provide ample ventilation
in rooms where batteries are being charged.
Failure to do so may result in severe bodily
injury and/or property damage.
•
A battery is a live electrical source. It
cannot be disconnected or neutralized. Do
not drop any tool or conductive object onto
the battery. A conductive object that comes
in contact with the battery terminals will
initiate a short circuit of the battery. This
could cause the battery to explode resulting
in severe bodily injury and/or property
damage.
•
Battery electrolyte is poisonous and
dangerous. It contains sulfuric acid. Avoid
contact with skin eyes or clothing. Wear
rubber gloves and safety glasses while
servicing batteries. DO NOT INGEST! This
may result in severe bodily injury.
Battery electrolyte will stain and corrode most
surfaces. Immediately and thoroughly clean any
surface outside of the battery that the battery
electrolyte comes in contact with. Failure to
clean may result in property damage.
MB-T48-02
DO NOT attempt the test the specific gravity of
a sealed battery. Removing the caps of a sealed
battery will damage the battery resulting in
premature failure.
Specific Gravity
Note: The battery must be fully charged before
performing this test.
The specific gravity of a cell is an indication
of the actual state of charge of the cell. A
fully charged cell should have a reading
of 1275 to 1300 (see the illustration to the
right). A discharged cell will read 1100.
Ideally, all cells in a battery will have the
same reading. Any cells in a battery that
vary by more than 30-points may be an
indication of a bad cell.
Clean the battery. Refer to
section for information on cleaning the
battery.
Using part number 77-200-00 hydrometer,
check and record the specific gravity of
each cell in the battery.
If, after charging, none of the cells exceed a hydrometer
reading of 1250 then there may be a fault in the charging
system. If the charging system checks OK then the
battery is no longer accepting a charge and should be
replaced.
Note: Refer to Charger Troubleshooting for
information on checking the charging system.
The highest reading will be the cell that is accepting
the most charge. This reading will be used to gauge all
other cells.
Compare the specific gravity readings to the highest
reading, if the difference between any of the cells is
more than 30-points, then the cell or battery should be
replaced.
Note: Contact the battery manufacturer for
information regarding replacing individual
cells in the battery.
Battery
Cleaning
Typical
Hydrometer
Float
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