Hioki 3273 Manuale utente

INSTRUCTION MANUAL

CLAMP ON PROBE

3273

Contents

Introduction i

Inspection i

Safety Notes i

Note on Use iv

Chapter 1 Overview 1

1.1 Product Overview 1

1.2 Features 1

1.3 Names of Parts 2

1.4 Parts of the Sensor 3

Chapter 2 Specifications 5

2.1 Product Specifications 5

2.2 Standards Applying 7

Chapter 3 Measurement Procedure 9

3.1 Notes on Use 9

3.2 Preparations for Measurement 13

3.3 Demagnetizing and Zero Adjustment 14

3.4 Measurement Procedure 16

____________________________________________________

Introduction

___________________________________________

WARNING

This device is designed to comply with IEC

61010-1 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 device.

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 device defects.

Introduction

Inspection

Safety Notes

Thank you for purchasing the HIOKI "3273 CLAMP

ON PROBE". To obtain maximum performance

from the device, please read this manual first, and

keep it handy for future reference.

When you receive the device, inspect it carefully to

ensure that no damage occurred during shipping. If

damage is evident, or if it fails to operate according

to the specifications, contact your dealer or Hioki

representative.

Supplied accessories

Instruction manual 1

Soft case 1

____________________________________________________

Safety Notes

___________________________________________

The symbol printed on the device

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

device.

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 device.

NOTE Indicates advisory items related to

performance or correct operation of the

device.

Safety Symbols

This manual contains information and warnings

essential for safe operation of the device and for

maintaining it in safe operating condition. Before

using the device, be sure to carefully read the

following safety notes.

The following symbols in this manual indicate the

relative importance of cautions and warnings.

iii

____________________________________________________

Safety Notes

___________________________________________

Overvoltage Categories (CAT)

This device conforms to the safety requirements for CAT I

measurement instruments.

To ensure safe operation of measurement instruments, IEC

60664 establishes safety standards for various electrical

environments, categorized as CAT I to CAT IV, and called

overvoltage categories. These are defined as follows.

CAT I : Secondary electrical circuits connected to an AC

electrical outlet through a transformer or similar

instrument.

CAT II : Primary electrical circuits in equipment

connected to an AC electrical outlet by 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 from the

distribution panel to outlets.

CAT IV : The circuit from the service drop to the service

entrance, and to the power meter and primary

overcurrent protection instrument (distribution

panel).

Higher-numbered categories correspond to electrical

environments with greater momentary energy, so a

measurement instrument designed for CAT III

environments can endure greater momentary energy than

one 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.

____________________________________________________

Note on Use

___________________________________________

DANGER

To avoid short circuits and potentially life-

threatening hazards, follow these precautions.

Never attach the 3273 to a circuit that operates

at more than 300V, or over bare conductors.

While the core section is open, and when

conductors being measured carry in excess of

the safe voltage level (SELV-E) and not more

than 300 V, make sure that conductors to be

measured are insulated with material

conforming to (1) Overvoltage Category I,(2)

Basic Insulation Requirements for Working

Voltages of 300 V, and (3) Pollution Degree 2.

For safeties sake, never use this sensor on

bare conductors. The core and shield case are

not insulated.

Be careful to avoid damaging the insulation

surface while taking measurements.

Note on Use

Follow these precautions to ensure safe operation

and to obtain the full benefits of the various

functions.

____________________________________________________

Note on Use

___________________________________________

DANGER

This device is made for use with the 3272

POWER SUPPLY. It is possible to use a power

supply other than the 3272, provided that the

connector and pin assignments match, and that

voltage and other electrical specifications are

satisfied. In the interest of safety, make sure

that the power supply has a protective earthing

with double-insulation construction.

Make sure that the waveform measuring

equipment connected to this device's output

terminal (BNC) is equipped with a protective

earthing with double-insulation construction.

To avoid electric shock, do not touch the

portion beyond the barrier during use.

If the waveform measuring instrument being

connected to the output terminal (BNC) on this

device is equipped with any other measurement

terminals, take the following precautions to

ensure that the other instrument does not form

a bridge between the probe and any hazardous

live of a part.

1. Isolate the terminal to which the probe is

connected from other terminals on the

measuring instrument using basic insulation

conforming to the overvoltage category,

working voltage, and pollution degree

requirements of the circuit being tested.

____________________________________________________

Note on Use

___________________________________________

DANGER

2. If basic insulation requirements cannot be

met between the terminal to which this device

is connected and other terminals of the

measuring instrument, make sure that the

voltage input to the measurement terminal

does not exceed the safe voltage level (SELV-

E).

3. Read and observe all warnings and

precautions relating to electrical safety for the

measuring instrument being connected to the

probe.

Refer to the following standards regarding the

meanings of underlined terms.

IEC61010-1

IEC61010-2-031

IEC61010-2-032

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