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 current that flows through the meter, and to measure current 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 measurements and to check continuity through wires and electrical 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.

11.3 BATTERY

NOTE: Unit comes equipped with a maintenance-free battery that requires no regular maintenance except cleaning the terminals.

WARNING: Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer and reproductive harm. Wash hands after handling.

Battery Removal and Installation

Remove (Figure 32)

1.Tip seat forward.

2.Disconnect negative (-) cable first, then positive (+) cable.

3.Remove battery hold-down bracket and battery from unit.

Install

1.Install battery on the unit with battery hold-down bracket.

2.Connect positive (+) cable first, then negative (-) cable.

3.Apply petroleum jelly or dielectric grease to battery cable ends and terminals.

4.Tip seat back.

Cleaning Battery and Battery Cables

1.Tip seat forward.

2.Disconnect negative (-) cable first, then positive (+) cable.

3.Clean battery cable ends, negative (-) terminal, and positive (+) terminal with a wire brush and rinse with a weak baking soda solution.

4.Connect positive (+) cable first, then negative (-) cable.

5.Apply petroleum jelly or dielectric grease to battery cable ends and terminals.

6.Tip seat back.

5 1

6

3

4

2

1.

Battery Hold-Down

4.

Battery

 

Bracket

5.

Positive (+) Terminal

2.

Negative (-) Cable

6.

Positive (+) Cable

3.

Negative (-) Terminal

 

 

OE0120

Figure 32

Charging The Battery

WARNING: FROZEN BATTERIES CAN EXPLODE and result in death or serious injury. DO NOT charge a frozen battery. Let the battery thaw before charging.

Follow First Aid directions for contact with battery fluid.

•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!

•In case of internal contact, DO NOT induce vomiting!

IMPORTANT: DO NOT fast charge. Charging at a high rate will damage or destroy battery.

11 - 33