KYORITSU 4105A User Manual

INSTRUCTION MANUAL

Digital Earth Resistance Tester

MODEL 4105A

KYORITSU ELECTRICAL INSTRUMENTS

WORKS, LTD.

01-07 92-1494

KYORITSU ELECTRICAL
INSTRUMENTS
WORKS, LTD.

No.5-20,Nakane 2-chome, Meguro-ku, Tokyo
152-0031 Japan
Phone :[phone] Fax : [phone]
URL : http://www.kew-ltd.co.jp
E-mail : [e-mail]

Factories : Uwajima & Ehime

Kyoritsu reserves the rights to change specifications or designs described in
this manual without notice and without obligations.

DISTRIBUTOR

1. Safty Precautions

The instrument is designed, manufactured, tested and shipped in prime

condition in accordance with the following standards.

IEC 61010-1 Overvoltage CAT III 300V Pollution Degree 2
IEC 61010-2-31
IEC 61557-1,5
IEC 60529 (IP54)

This instruction manual contains warnings and safety rules which must be
observed by the user to ensure safety operation of the instrument and to
retain it in safe condition. Therefore, read through these instructions before
using the instrument.

WARNING

Read through and understand instructions contained in this manual

before using the instrument.

Save and keep the manual handy to enable quick reference whenever

necessary.

Be sure to use the instrument only in its intended applications and to

follow measurement procedures described in the manual.

Be sure to understand and follow all safety instructions contained in the

manual.
Be sure to observe the above rules strictly. Not following the instructions
may cause injury or instrument damage.

The symbol on the instrument means that the user must refer to the

manual for safe operation of the instrument. There are three kinds of the
symbol . Read the instructions following each symbol carefully.

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CONTENTS

1. Safety Precautions …………………………………………………………… 1

2. Features ………………………………………………………………………… 4

3. Specifications…………………………………………………………………… 5

4. Layout Diagram ………………………………………………………………… 8

5. Preparation for Measurement ………………………………………………… 9
5-1 Battery Voltage Check …………………………………………………… 9
5-2 Connecting Test Probes ………………………………………………… 9

6. Operating Instructions ………………………………………………………… 9
6-1 Principle of Measurement ……………………………………………… 9
6-2 Precise Measurement …………………………………………………… 10
6-3 Simplified Measurement ………………………………………………… 11

7. Battery Replacement ………………………………………………………… 14

8. Notes on Housing Case & Accessories …………………………………… 15
8-1 Case Lid…………………………………………………………………… 15
8-2 How to Fit Strap Belt …………………………………………………… 15

9. Before Sending for Service ………………………………………………… 16

10. Service ……………………………………………………………………… 17

DANGER is reserved for conditions and actions that are likely to cause

serious or fatal injury.

WARNING is reserved for conditions and actions that can cause

serious or fatal injury.

CAUTION is reserved for conditions and actions that can cause minor

injury or instrument damage.

DANGER

Make sure that the range selector switch is set to a desired position

before making measurement.

Do not make measurement in the presence of flammable gasses.

Otherwise, the use of the instrument may cause sparkling, which leads
to an explosion.

Never attempt to connect the test probe if the instrument or your hand is

wet.

Do not apply an electrical quantity exceeding the allowable limit of a

measuring range.

Never open the battery compartment cover while making measurement.

WARNING

Never attempt to make measurement, if any abnormal conditions are

noted, such as broken case, cracked test probe and exposed metal
parts.

Never turn the range selector switch with test probe connected to the

equipment under test.

Do not install substitute parts or make any decomposition or

modification to the instrument. Return the instrument to Kyoritsu or your

distributor for repair or re-calibration.
Do not replace batteries when the surface of the instrument is wet.
Always set the range switch to the OFF position before opening the

battery compartment cover for battery replacement.

CAUTION

Make sure that the test probe are securely connected to the terminal of

the instrument.

Be sure to set the range selector switch to the OFF position after use.

When the instrument will not be in use for a long period of time, place it
in storage after removing the batteries.

Do not expose the instrument to the direct sun, extreme temperature

and humidity or dew fall.

Use a damp cloth soaked in water or neutral detergent for cleaning the

instrument. Do not use abrasives or solvents.

When the instrument is wet, make sure to let it dry before putting it in

storage.

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