Hioki 3270 Manuale utente

INSTRUCTION MANUAL

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3270

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CURRENT MONITOR

Contents

Introduction 1

Notes on Safety 1

Inspection 3

Precautions 3

Chapter 1 3270 Current Monitor 5

1.1 Product Overview 5

1.2 Identification of Indicators 6

1.3 Product Specifications 6

1.4 Measurement Procedure 9

1.4.1 Preparation 9

1.4.2 Measurement 10

1.4.2.1 When Using the 9273 11

1.4.2.2 When Using the 9274 13

1.4.2.3 When Using the 9275 16

1.4.2.4 When Using the 9276 18

1.4.3 Explanation of Each Function 20

1.4.3.1 Connector 20

1.4.3.2 Output Terminals 20

1.4.3.3 Measurement ranges 21

1.4.3.4 Demagnetizing (DEMAG) 23

1.4.3.5 Zero adjustment (ZERO ADJ.) 23

1.4.3.6 Coupling (COUPLING) 24

1.4.3.7 Filter (FILTER) 24

1.4.3.8 Overload indicator (OVERLOAD) 25

1.5 Fuse Replacement 25

Chapter 2 9273 Clamp-On AC Sensor 27

2.1 Product Specifications 27

Chapter 3 9274 Clamp-On AC/DC Sensor 31

3.1 Product Specifications 31

Chapter 4 9275 Clamp-On AC Sensor 35

4.1 Product Specifications 35

Chapter 5 9276 Clamp-On AC/DC Sensor 39

5.1 Product Specifications 39

WARNIN

This instrument is designed to prevent accidental

shock to the operator when properly used. However

no engineering design can render safe an instrument

which is used carelessly. Therefore, this manual

must be read carefully and completely before making

any measurement. Failure to follow directions can

result in a serious of fatal accident.

ntroduction

otes on Safety

Thank you for purchasing this Hioki 3270 Current

Monitor. In order to use this product effectively and to

ensure that it enjoys a long operational life, read this

Instruction Manual carefully and then retain it for future

reference.

This symbol is affixed to locations on the equipment

where the operator should consult corresponding

topics in this manual (which are also marked with the

symbol) before using relevant functions of the

equipment.

In the manual, this mark indicates explanations

which it is particularly important that the user read

before using the equipment.

This symbol denotes a ground terminal.

This symbol denotes a fuse.

DANGE

Indicates that incorrect operation presents extreme

danger of accident resulting in death or serious

injury to the user.

WARNIN

Indicates that incorrect operation presents

significant danger of accident resulting in death or

serious injury to the user.

CAUTIO

Indicates that incorrect operation presents

possibility of injury to the user or damage to the

equipment.

NOTE Denotes items of advice related to performance of

the equipment or to its correct operation.

Safety Symbols

This Instruction Manual provides information and

warnings essential for operating this equipment in a safe

manner and for maintaining it in safe operating

condition. Before using this equipment, be sure to

carefully read the following safety notes.

The following symbols are used in this Instruction

Manual to indicate the relative importance of cautions

and warnings.

CAUTIO

• Do not subject the unit to vibrations or shocks during

transport or handling. Be especially careful to avoid

dropping the unit.

• Do not store the unit where it will be exposed to direct

sunlight, high temperature, high humidity, or

condensation. If exposed to such conditions, the unit

may be damaged, the insulation may deteriorate, and

the unit may no longer satisfy its specifications.

• Before using the unit, inspect it and check the operation

to make sure that the unit was not damaged due to

poor storage or transport conditions. If damage is

found, contact your dealer or Hioki representative.

nspection

recautions

When the unit is delivered, check and make sure that it

has not been damaged in transit. In particular, check the

accessories, panel switches, and connectors.

If the unit is damaged, or fails to operate according to the

specifications, contact your dealer or Hioki representative.

In order to ensure safe operation and to obtain maximum

performance from the unit, observe the cautions listed

below.

WARNIN

This unit is designed to be grounded through the

three-wire power cord provided. In order to prevent

electric shock, etc., connect this power cord to a

grounded three-prong power receptacle.

Before using a three-prong adapter, be sure to

connect the green wire from the adapter to ground.

CAUTIO

• When unplugging the power cord from the power

receptacle or from the unit, grasp the plug, not the cord

in order to avoid damaging the cable.

• Several volts are generated at the output terminal when

the power is turned on or turned off.

CAUTIO

• If there is any type of dust or dirt on the core contact

surfaces, measurements may be affected. Wipe it

away gently with a soft cloth.

• Do not apply any sort of mechanical impact to the core

section. Scratches on the core surfaces will make

accurate measurements impossible.

• Do not bend or pull the sensor cables (especially where

the cable connects to the sensor) in order to avoid

damaging the sensor cables.

• When the power for the 3270 is on, keep the core

section of the sensor closed, except when clamping

them onto the conductor to be measured. (The facing

surface of the core section can be scratched while it is

open.)

• Taking the sensor apart may damage the open-close

mechanism that could result in an inoperative unit.

Current Monitor (3270)

Clamp-On Sensor

Chapter 1 3270 Current Monitor

Chapter

3270 Current Monito

.1 Product Overview

This monitor is a seven-range amp designed especially for

the 9273, 9274, 9275, and 9276 clamp-on sensors. When

used in conjunction with any of the four sensors and

connected to a recorder, oscilloscope, etc., this unit can be

used to easily record and monitor current waveforms.

Chapter 1 3270 Current Monitor

ouplin

witch

Connecto

Ground terminal

Power supply connecto

Output terminals

(Johnson terminals

)

FrontRea

Filter

switc

Overload

indicators

Demagnetizing

switch

Zero

adjustment

dial

Ranges Range switc

Output termina

(BNC terminal)

Fuse holde

Power ON

Power switc

Power OFF

.2 Identification of Indicators

.3 Product Specifications

(Accuracy is guaranteed at 23°C±3°° °C after the power has

been on for 30 minutes)

♦Compatible sensors 9273, 9274, 9275, 9276

♦Output voltage 1V/range (front: Johnson

terminals; rear: BNC terminal)

♦Measurement ranges 0.1/0.2/0.5/1/2/5/10 A

(when using the 9273 or 9274)

1/2/5/10/20/50/100 A

(when using the 9275 or 9276)

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