Greenlee 5778 Leitfaden

OPERATION, SERVICE AND

PARTS INSTRUCTION MANUAL

999 9605.7 IM 1065 REV 1 9/97

Read and understand this

material before operating or

servicing this equipment.

Failure to understand how to safely

operate this tool could result in an

accident causing serious injury or death.

MEGOHMMETER

MODEL 5778

Greenlee Textron / Subsidiary of Textron Inc.

5778 Megohmmeter

IMPORTANT SAFETY

INSTRUCTIONS

SAFETY ALERT

SYMBOL

The symbol above is used to call your

attention to instructions concerning

your personal safety. Watch for this

symbol. It points out important safety

precautions. It means “ATTENTION!

Become alert! Your personal safety

is involved!” Read the message that

follows and be alert to the possibility

of personal injury or death.

Immediate hazards which, if not

avoided, WILL result in severe personal

injury or death.

Hazards or unsafe practices which, if not

avoided, COULD result in severe personal

injury or death.

Hazards or unsafe practices which, if not

avoided, COULD result in minor personal

injury or property damage.

SAVE THESE INSTRUCTIONS

Additional copies of this manual are

available upon request at no charge.

4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070

5778 Megohmmeter

IMPORTANT SAFETY

INSTRUCTIONS

A person who has not read

and does not understand all

operating instructions is not

qualified to operate this tool.

Failure to read and understand

safety instructions may result

in injury or death.

SAVE THESE INSTRUCTIONS

Additional copies of this manual are

available upon request at no charge.

Electric shock hazard:

Contact with the test leads

while turning the hand crank

could result in severe injury

or death.

Electric shock hazard:

Contact with live circuits

could result in severe injury

or death.

Greenlee Textron / Subsidiary of Textron Inc.

5778 Megohmmeter

SAVE THESE INSTRUCTIONS

Additional copies of this manual are

available upon request at no charge.

IMPORTANT SAFETY

INSTRUCTIONS

• Do not connect the tester to a source

of voltage or current. Damage to the

tester may result.

• Do not perform any service or

maintenance other than as described

in the manual. Unauthorized repairs

will void the warranty and may

damage the tester.

• Do not use or store the tester in hot

(more than 135°F or 57°C) or

humid (more than 80% relative

humidity) conditions. Damage to the

tester may result.

Failure to observe these precautions

could result in injury and damage to

the tester.

Do not use the tester if it is wet or

damaged. Electric shock may result.

Failure to observe this warning could

result in severe injury or death.

4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070

5778 Megohmmeter

Description

The 5778 Megohmmeter is intended to

perform nondestructive insulation tests for

electrical wire, machines, transformers,

motors, and other equipment.

Features

• Large, easy-to-read display

• 3 Test Ranges

• Hand Crank

• Protective Leather Carrying Case

• Color-coded test leads

• Insulated alligator clips

Display

Alligator Clips

Hand CrankTest Leads

Test Ranges

Greenlee Textron / Subsidiary of Textron Inc.

5778 Megohmmeter

Megohmmeter Test

1. Visually inspect the tester, test leads,

and alligator clips.

2. Plug the red test lead into the positive

jack, and plug the black test lead into

the negative jack.

Note: Be sure that the clips do not

contact anything.

3. Press the 1000 volt selector switch.

4. Turn the crank clockwise approximately

2-1/2 to 3 turns per second. The

pointer should move to the right-hand

side of the scale (toward the infinity

mark). Any other reading indicates that

the test leads are damaged or the

megohmmeter needs repair.

5. Connect the alligator clips together.

Turn the crank clockwise approxi-

mately 2-1/2 to 3 turns per second.

The pointer should move to the left-

hand side of the scale (toward zero).

Any other reading indicates that the

test leads are damaged.

Setup

Note: Refer the manufacturer’s

specifications to find the

operating voltage of the device

under test.

1. Shut off and disconnect power. Make

sure all capacitors are fully discharged.

Voltage must not be present.

2. Select the test range on the

megohmmeter to twice the operating

voltage for the device under test.

4455 Boeing Dr., Rockford, IL 61109-2988 815/397-7070

5778 Megohmmeter

Resistance to Ground Test

1. Connect the red test lead to a ground

such as the frame of the device to be

checked.

2. Connect the black test lead to the

circuit.

3. Turn the hand crank approximately

2-1/2 to 3 turns per second and read

the display.

Resistance Between Wires Test

1. Connect the test leads to the

conductors.

2. Turn the hand crank approximately

2-1/2 to 3 turns per second and read

the display.

To Determine the Insulation

Resistance:

• 250-volt range: Tester Reading x .5 =

Resistance in Megohms

• 500-volt range: Tester Reading =

Resistance in Megohms

• 1000-volt range: Tester Reading x 2 =

Resistance in Megohms

Lifetime Limited Warranty

Greenlee warrants to the original purchaser

of these goods for use that these products

will be free from defects in workmanship

and material for their useful life, excepting

normal wear and abuse. This warranty is

subject to the same terms and conditions

contained in Greenlee’s standard one year

limited warranty.

For all Test Instrument repairs, ship units

Freight Prepaid to:

Greenlee Textron at 4411 Boeing Drive,

Rockford, IL 61109-2932 USA.

Mark all packages: Attention TEST

INSTRUMENT REPAIR. For items not

covered under warranty (such as dropped,

abused, etc.), repair cost quote available

upon request.

Note: Prior to returning any test instrument,

please check replaceable batteries or

make sure the battery is at full

charge.

Greenlee Textron

Subsidiary of Textron Inc.

4455 Boeing Drive

Rockford, IL 61109-2988 USA

General Offices: 815/397-7070

Customer Center and Field Service:

800/435-0786

Fax (24 Hour) Customer Center:

800/451-2632 • 815/397-1865

Canada Fax (24 Hour) Customer Center:

800/524-2853

Printed in the U.S.A.

MANUAL DE INSTRUCCIONES

SOBRE OPERACIÓN, SERVICIO

Y PARTES

999 9605.7 IM 1065 REV 1 9/97

Lea y entienda este

documento antes de manejar

o dar servicio a este equipo.

Utilizarlo sin comprender cómo manejarlo

de manera segura podría ocasionar un

accidente y como resultado de éste,

graves lesiones o incluso la muerte.

MEGÓHMETRO

MODELO 5778

Greenlee Textron / Filial de Textron, Inc.

Megóhmetro 5778

IMPORTANTES

INSTRUCCIONES SOBRE

SEGURIDAD

GUARDE ESTAS INSTRUCCIONES

Copias adicionales de este manual pueden

obtenerse gratuitamente, previa solicitud.

Este símbolo se utiliza para llamar su

atención hacia las instrucciones sobre

seguridad personal. Ponga atención

cuando lo vea ya que le indica

importantes precauciones que debe

tomar para su propia seguridad.

Significa: “¡ATENCIÓN! ¡Póngase alerta

o podría atentar contra su seguridad!”

Lea el mensaje que aparece enseguida

y esté consciente de que puede sufrir

lesiones o incluso la muerte.

SÍMBOLO DE

ALERTA SOBRE

SEGURIDAD

Peligro inmediato que, de no evitarse,

OCASIONARÁ graves lesiones

personales o la muerte.

Peligro o prácticas peligrosas que, de

no evitarse, PODRÍAN OCASIONAR

graves lesiones personales o la muerte.

Peligro o prácticas peligrosas que, de no

evitarse, PODRÍAN OCASIONAR lesiones

de menor gravedad o daño a la propiedad.

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