Hioki 3143 Bedienungsanleitung

3143

EARTH HiTESTER

INSTRUCTION MANUAL

Contents

Introduction i

Inspection i

Safety Notes ii

Notes on Use vi

Chapter 1 Outline 1

1.1 Product Outline 1

1.2 Features 2

1.3 Names and Functions of Parts 4

Chapter 2 Specifications 7

Chapter 3 Measurement Procedure 11

3.1 Measurement Preliminaries 12

3.2 Measuring method 13

Chapter 4 Technical Information 19

4.1 About Ground Resistance 19

4.2 Principle of Conventional Measurement

of Ground Resistance

(Fall-of-Potential Method) 21

4.3 Principle of Measurement on Which

This Instrument is Based 22

4.4 Comparison of Values Measured

by Conventional Ground Resistance

Meters (Fall-of-Potential Method)

and Model 3143 24

4.5 Sample Measurement

(Measurement of Ground Resistance

for Overhead Telecommunications

Equipment and Various Types

of Protectors) 26

Chapter 5 Precautions concerning

Measurement 29

Chapter 6 Maintenance and Service 31

6.1 9338 CARRYING CASE 31

6.2 Replacing the Batteries 32

6.3 Cleaning the Product 34

6.4 Service 34

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Introduction

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Introduction

Inspection

Thank you for purchasing the HIOKI 3143

EARTH HiTESTER. To obtain maximum

performance from the instrument, please read

this manual first, and keep it handy for future

reference.

When you receive the instrument, inspect it

carefully to ensure that no damage occurred

during shipping. In particular, check the

accessories, panel knob, and connectors. If

damage is evident, or if it fails to operate

according to the specifications, contact your

dealer or Hioki representative.

Accessories

9216 CABLE WINDER (with 9265)

9265 MEASUREMENT CABLE

(Lead line (Black) 1 m, Return line

(Red) 20 m)

9338 CARRYING CASE

Instruction Manual

LR6 alkaline batteries (four)

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Safety Notes

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WARNING

This instrument is designed to comply with IEC

61010 Safety Standards, and has been thoroughly

tested for safety prior to shipment. However,

mishandling during use could result in injury or

death, as well as damage to the instrument. Be

certain that you understand the instructions and

precautions in the manual before use. We

disclaim any responsibility for accidents or

injuries not resulting directly from instrument

defects.

The symbol printed on the instrument

indicates that the user should refer to a

corresponding topic in the manual

(marked with the symbol) before using

the relevant function.

In the manual, the symbol indicates

particularly important information that the

user should read before using the

instrument.

Indicates DC (Direct Current).

Safety Notes

Safety symbols

This manual contains information and

warnings essential for safe operation of the

instrument and for maintaining it in safe

operating condition. Before using it, be sure to

carefully read the following safety precautions.

iii

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Safety Notes

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DANGER

Indicates that incorrect operation

presents an extreme hazard that could

result in serious injury or death to the

user.

WARNING

Indicates that incorrect operation

presents a significant hazard that could

result in serious injury or death to the

user.

CAUTION

Indicates that incorrect operation

presents a possibility of injury to the

user or damage to the instrument.

NOTE Indicates advisory items related to

performance or correct operation of the

instrument.

The following symbols in this manual indicate

the relative importance of cautions and

warnings.

We define measurement tolerances in terms of

rdg. (reading) values, with the following

meanings:

rdg. (reading or displayed value)

The value currently being measured and

indicated on the measuring instrument.

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Safety Notes

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Measurement categories (Overvoltage

categories)

This instrument complies with CAT I safety

requirements.

To ensure safe operation of measurement

instruments, IEC 61010 establishes safety

standards for various electrical environments,

categorized as CAT I to CAT IV, and called

measurement categories. These are defined as

follows.

CAT I: Secondary electrical circuits that are

connected to a wall outlet through a

transformerorsimilardevice.

CAT II: Primary electrical circuits in

equipment connected to a wall outlet

via a power cord (portable tools,

household appliances, etc.)

CAT III: Primary electrical circuits of heavy

equipment (fixed installations)

connected directly to the distribution

panel, and feeders between the

distribution panel and outlets.

CAT IV: The circuit from the service drop to

the service entrance, then to the

power meter and to the primary

overcurrent protection device.

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Safety Notes

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Higher-numbered categories correspond to

electrical environments with greater momentary

energy. So a measurement device designed for

CAT III environments can endure greater

momentary energy than a device designed for

CAT II.

Using a measurement instrument in an

environment designated with a higher-

numbered category than that for which the

instrument is rated could result in a severe

accident, and must be carefully avoided.

Never use a CAT I measuring instrument in

CAT II, III, or IV environments.

The measurement categories comply with the

Overvoltage Categories of the IEC60664

Standards.

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Notes on Use

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Notes on Use

Follow these precautions to ensure safe

operation and to obtain the full benefits of the

various functions.

Preliminary Checks

Before using the instrument the first time,

verify that it operates normally to ensure

that the no damage occurred during storage

or shipping. If you find any damage, contact

your dealer or Hioki representative.

Before using the instrument, make sure that

the insulation on the measurement cables is

undamaged and that no bare conductors are

improperly exposed. Using the product in

such conditions could cause an electric

shock, so contact your dealer or Hioki

representative for replacements. (Model

9265)

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