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Voltage Measurement
There are two basic rules to be remembered when
using a voltmeter. A voltmeter measures the voltage
difference between the test leads and the voltmeter is
always connected across the circuit under test.
Current Measurement
The two rules to remember when measuring current
with an ammeter are; an ammeter measures the cur-
rent that flows through the meter, and to measure cur-
rent an ammeter must be connected into the circuit.
The latter rule means that the circuit must be opened,
and the ammeter wired into it. Because this procedure
is usually difficult, an ammeter is seldom used for trou-
bleshooting.
Resistance Measurement
An Ohmmeter is used to make resistance measure-
ments and to check continuity through wires and elec-
trical components.
There is one rule to keep in mind when using an ohm-
meter. The ohmmeter has a self contained battery and
requires no electrical power. Using the ohmmeter on a
circuit that has power applied may result in damage to
the meter.
IMPORTANT:
Disconnect the equipment battery when
making Ohmmeter test or damage to the Ohmmeter
may result.
IMPORTANT:
An ohmmeter reads the resistance of
whatever component is connected between the test
leads. It can be used to check wires, coils, light bulbs,
or any item that conducts current.
9.3 BATTERY
When charging battery, remove it from unit first. Keep
batteries out of reach of children. ALWAYS follow
information provided on battery by battery
manufacturer. Lead acid batteries generate explosive
gases. Severe chemical burns can result from improper
handling of battery electrolyte. Wear safety glasses
and proper protective gear when handling batteries to
prevent electrolyte from coming in contact with eyes,
skin or clothing.
Battery Electrolyte First Aid
-External contact: Flush with water.
-Eyes: Flush with water for at least 15 minutes and get
medical attention immediately!
-Internal contact: Drink large quantities of water. Follow
with Milk of Magnesia, beaten egg or vegetable oil. Get
medical attention immediately!
IMPORTANT:
In case of internal contact, DO NOT
induce vomiting!
Inspection, Cleaning, Drying, and Maintenance
Inspect the top of battery, terminals, cables, terminal
posts, and case for any accumulation of dirt, corrosion
cracks or loose or broken parts. Keep battery and its
terminals clean. Inspect monthly to maintain best
performance. Replace battery if damaged.
Remove hold down and bolt and lift battery out. Clean
or service battery away from unit. Remove corrosion
from battery terminals and cable connections with wire
brush, then wash with a weak baking soda solution.
Scrub the exterior of the battery and cable terminals
with a nonmetallic brush which has been dipped into a
mixture of baking soda and water.
After cleaning, apply a thin coat of grease or petroleum
jelly to terminals and cable ends to retard corrosion.
Reinstall battery.
Check the alternator voltage regulator output (if used)
at every periodic maintenance inspection. Over
charging is a common cause of battery failure.
Electrolyte Level
Every 25 hours of operation, check electrolyte level of
each cell by removing caps one at a time. The
electrolyte level should be at level indicated. Use
distilled water to fill each cell if needed. Install and
tighten each cap after checking.
WARNING:
ELECTRIC SHOCK may result in
injury and/or damage to unit.
DO NOT allow tools or other objects to come
into contact with both terminal at the same
time. ALWAYS remove Negative (-) Cable first
to reduce risk of sparks when removing bat-
tery. ALWAYS connect Positive (+) Cable first,
then connect Negative (-) Cable when install-
ing battery.
WARNING:
EXPLOSIVE GASES can result
in serious injury or death. ALWAYS keep open
flames, sparks, or smoking materials away
from battery.
POISONOUS BATTERY FLUID contains sul-
furic acid and its contact with skin, eyes or
clothing can cause severe chemical burns.
ALWAYS wear safety glasses and protective
gear near battery.
DO NOT TIP any battery beyond 45 degree
angle in any direction.
ALWAYS KEEP BATTERIES OUT OF REACH
of children.
WARNING:
REVERSE CONNECTIONS may
result in sparks which may result in injury.
ALWAYS connect/disconnect cables in proper
order.