Hioki 3285-20 User manual

3285-20

CLAMP ON AC/DC HiTESTER

Instruction Manual

December 2014 Revised edition 10 3285B981-10 14-12H

Contents

Introduction i

Verifying Package Contents ii

Safety Information iii

Operating Precautions viii

Preliminary Check xv

Chapter 1 Overview 1

1.1 Product Overview 1

1.2 Features 2

1.3 Names and Functions of Parts 3

1.4 Flowchart of button Operations 10

1.4.1 Current Measurements Mode 10

1.4.2 Voltage Measurements Mode 11

1.4.3 Frequency Measurements Mode 12

1.4.4 Resistance Measurements Mode 12

1.5 Modes 13

Chapter 2 Measurement 15

2.1 Preparations 15

2.1.1 Installing or Replacing the Battery 15

2.1.2 Attaching the Hand Strap 16

2.1.3 Turning the Power On and Off 16

2.1.4 Battery Low Warning (When mark lights) 17

2.1.5 Pre-Operation Inspection 18

3285B981-10

2.2 Current Measurement 19

2.2.1 Measuring DC Current (DC A) 19

2.2.2 Measuring AC Current (AC A) 21

2.2.3 Measuring AC/DC Current (AC+DC A) 22

2.2.4 Peak Hold Measurement 24

2.3 Voltage Measurement 26

2.3.1 Measuring DC Voltage (DC V) 26

2.3.2 Measuring AC Voltage (AC V) 27

2.3.3 Measuring AC/DC Voltage (AC+DC V) 28

2.3.4 Peak Hold Measurement 29

2.4 Frequency Measurement 31

2.4.1 Frequency Measurement in Current Mode 31

2.4.2 Frequency Measurement in Voltage Mode 32

2.5 Resistance Measurement 34

2.6 Continuity Check 36

Chapter 3 Useful Functions 39

3.1 Adjusting and Correcting Values 39

3.1.1 Auto-Zero-Adjustment Function 39

3.1.2 Zero-Cancel Correction Function 40

3.2 Pausing and Reading the Display

(Data Hold Function HOLD) 41

3.3 Alteration of Counter Updates 42

3.3.1 SLOW mode 42

3.3.2 FAST mode 42

3.4 Storing Values in Memory

(Recording Function REC) 43

3.5 Automatically Turning Power Off

(Auto Power-Off Function APS) 47

3.6 Beep Tone 48

Chapter 4 Specifications 49

4.1 Measurement Specifications 49

4.1.1 Current Measurement Specifications 49

4.1.2 Voltage Measurement Specifications 52

4.1.3 Resistance Measurement Specifications 54

4.1.4 Continuity Check 54

4.2 General Specifications 55

Chapter 5 Maintenanceand Service 59

5.1 Cleaning 59

5.2 After service 59

5.3 Troubleshooting 60

5.4 Error Massage 64

i___________________________________________________

Introduction

___________________________________________________

Introduction

Thank you for purchasing the HIOKI "3285-20

Clamp-on AC/DC HiTester."

To obtain maximum performance from the

instrument, please read this manual first, and keep it

handy for future reference.

Request

We have tried to bring this manual as close to

perfection as we could achieve. If perchance you

find any unclear portions, mistakes, omissions, or

the like, we would be most obliged if you could

please notify us of them via any HIOKI agent, or

directly.

ii___________________________________________________

Verifying Package Contents

___________________________________________________

Verifying Package Contents

When you receive the instrument, inspect it

carefully to ensure that no damage occurred during

shipping. In particular, check the accessories, panel

switches, and connectors.

If damage is evident, or if it fails to operate

according to the specifications, contact your dealer

or Hioki representative.

Main unit

3285-20 Clamp-on AC/DC HiTester

Supplied accessories

9345 Carrying Case 1

L9207-10 Test Lead (red and black) 1

Hand Strap 1

Battery 6F22(006P) 1

Instruction manual 1

iii___________________________________________________

Safety Information

___________________________________________________

DANGER

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.

Safety Information

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.

iv___________________________________________________

Safety Information

___________________________________________________

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 both DC (Direct Current) and AC

(Alternating Current).

Indicates DC (Direct Current).

Indicates that dangerous voltage may be

present at this terminal

Indicates a double-insulated device.

Indicates a grounding terminal.

Indicates that the instrument may be connected

to or disconnected from a live circuit.

Safety Symbols

v___________________________________________________

Safety Information

___________________________________________________

DANGER

Indicates that incorrect operation presents

extreme danger of accident resulting in

death or serious injury 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.

Accuracy

We define measurement tolerances in terms of f.s.

(full scale), rdg. (reading) and dgt. (digit) values,

with the following meanings:

f.s. (maximum display value or scale length)

The maximum displayable value or scale length.

This is usually the name of the currently selected

range.

rdg. (reading or displayed value)

The value currently being measured and indicated

on the measuring instrument.

dgt. (resolution)

The smallest displayable unit on a digital measuring

instrument, i.e., the input value that causes the

digital display to show a "1" as the least-significant

digit.Accuracy

vi___________________________________________________

Safety Information

___________________________________________________

CAT II Primary electrical circuits in equipment

connected to an AC electrical outlet by a

power cord (portable tools, household

appliances, etc.)

CAT II covers directly measuring

electrical outlet receptacles.

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 device

(distribution panel).

Measurement categories

This instrument complies with CAT III safety

requirements.

To ensure safe operation of measurement

instruments, IEC 61010 establishes safety standards

for various electrical environments, categorized as

CAT II to CAT IV, and called measurement

categories. These are defined as follows.

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.

Use of a measurement instrument that is not CAT-

rated in CAT II to CAT IV measurement

applications could result in a severe accident, and

must be carefully avoided.

vii___________________________________________________

Safety Information

___________________________________________________

viii___________________________________________________

Operating Precautions

___________________________________________________

DANGER

To avoid short circuits and potentially life-

threatening hazards, never attach the clamp to

a circuit that operates at more than 600 Vrms.

The maximum rated voltage to earth is 600

Vrms. Attempting to measure voltage in excess

of the maximum rated voltage to earth could

destroy the instrument and result in personal

injury or death.

This instrument should only be connected to

the secondary side of a breaker, so the breaker

can prevent an accident if a short circuit

occurs. Connections should never be made to

the primary side of a breaker, because

unrestricted current flow could cause a serious

accident if a short circuit occurs.

To avoid electric shock, do not touch the

portion beyond the protective barrier during

use.

Never apply voltage to the test leads when the

Resistance measurement, Continuity Check

modes are selected. Doing so may damage the

instrument and result in personal injury.

To avoid electrical accidents, remove power

from the circuit before measuring.

Operating Precautions

Follow these precautions to ensure safe operation

and to obtain the full benefits of the various

functions.

ix___________________________________________________

Operating Precautions

___________________________________________________

WARNING

Do not allow the instrument to get wet, and do

not take measurements with wet hands. This

may cause an electric shock.

To avoid electric shock when measuring live

lines, wear appropriate protective gear, such as

insulated rubber gloves, boots and a safety

helmet.

During current measurement, to avoid an

electric shock accident, do not connect the test

leads or temperature probe to the instrument.

Input voltage exceeding 600 Vrms (1000 V max.)

with respect to ground could damage the

instrument and result in personal injury.

Be sure to insert them with the correct polarity.

Otherwise, poor performance or damage from

battery leakage could result.

To avoid electric shock when replacing the

battery, first disconnect the clamp from the

object to be measured.

After replacing the battery, replace the cover

and screws before using the instrument.

To avoid the possibility of explosion, do not

short circuit, disassemble or incinerate

batteries.

Handle and dispose of batteries in accordance

with local regulations.

x___________________________________________________

Operating Precautions

___________________________________________________

WARNING

To prevent electric shock, when measuring the

voltage of a power line use a test lead that

satisfies the following criteria:

Conforms to safety standards IEC61010 or

EN61010

Of measurement category III or IV

Its rated voltage is higher than the voltage to

be measured

The test leads provided with this instrument

conform to the safety standard EN61010.

Use a test lead in accordance with its defi ned

measurement category and rated voltage.

Do not use the instrument where it may be

exposed to corrosive or combustible gases.

The instrument may be damaged or cause an

explosion.

xi___________________________________________________

Operating Precautions

___________________________________________________

CAUTION

Do not store or use the instrument where it could

be exposed to direct sunlight, high temperature or

humidity, or condensation. Under such conditions,

the instrument may be damaged and insulation

may deteriorate so that it no longer meets

specifications.

This instrument is designed for use indoors. It can

be operated at temperatures between 0 and 40

without degrading safety.

Keep the clamp jaws and core slits free from

foreign objects, which could interfere with clamping

action.

For safety reasons, when taking measurements,

only use the Model L9207-10 Test Lead provided

with the instrument.

To avoid damage to the instrument, do not exceed

the maximum input current rating, which depends

on the frequency of the current being measured

(see Fig.3 of 4.1.1) Be careful about the evolution

of heat, when the input frequency is high.

The " " indicator lights up when the remaining

battery capacity is low. In this case, the

instrument's reliability is not guaranteed. Replace

the battery immediately.

When replacing the battery, make sure that the

metal battery snap fitting is firmly connected. If the

metal fitting is loose, adjust it and recheck the

connection. If it isn't connected securely, the

power may not be turned on, and a power may be

turned off during the use.

xii___________________________________________________

Operating Precautions

___________________________________________________

CAUTION

To avoid damage to the instrument, protect it from

physical shock when transporting and handling. Be

especially careful to avoid physical shock from

dropping.

Do not exert excessive pressure on the clamp

sensor or attempt to wedge the sensor into a tight

spot for measurement.

The protection rating for the enclosure of this

device (based on EN60529) is *IP40.

*IP40:

This indicates the degree of protection provided by

the enclosure of the device against use in

hazardous locations, entry of solid foreign objects,

and the ingress of water.

4: Protected against access to hazardous parts

with wire measuring 1.0 mm in diameter. The

equipment inside the enclosure is protected

against entry by solid foreign objects larger than

1.0 mm in diameter.

0: The equipment inside the enclosure is not

protected against the harmful effects of water.

xiii___________________________________________________

Operating Precautions

___________________________________________________

CAUTION

Removable sleeves are attached to the metal pins

at the ends of the test leads.

To prevent a short circuit accident, be sure to use

the test leads with the sleeves attached when

performing measurements in the CAT III

measurement category. In a CATII environment, if

the tips of the test leads do not reach the

measurement object, remove the rigid insulating

sleeve before measuring.

For details on measurement categories, see

Measurement categories (page vi) in the

instruction manual.

When performing measurements with the sleeves

attached, be careful to avoid damaging the

sleeves. If the sleeves are inadvertently removed

during measurement, be especially careful in

handling the test leads to avoid electric shock.

To prevent an electric shock accident, confirm that

the white or red portion (insulation layer) inside the

cable is not exposed. If a color inside the cable is

exposed, do not use the cable.

xiv___________________________________________________

Operating Precautions

___________________________________________________

NOTE Correct measurement may be impossible in the

presence of strong magnetic fields, such as near

transformers and high-current conductors, or in the

presence of strong electromagnetic fields such as

near radio transmitters.

To avoid corrosion from battery leakage, remove the

batteries from the instrument if it is to be stored for

a long time.

Hall elements are used in the current detection

portion of the clamp on AC/DC HiTester. As there

are two types of drifts in the Hall elements, drift

depending on time and drift depending on the

surrounding temperature, take note when conducting

continuous measurements.

The Hall elements lack uniformity, and it is

impossible to determine the amount of variation

which depends on time and the temperature. When

conducting continuous measurement or in an

environment where there are huge temperature

variations, it is recommended that the variation at

point 0 when nothing has been inputted should be

first noted. The variation at point 0 is the direct

current component.This does not affect the AC

mode.

Due to the offset peculiar to elements from a hall

effect, the display may sometimes not show 0

immediately after it is turned on, but this is not a

malfunction. The count remaining has an

instrumental difference of 0 to a few tens A.

When using in DC or AC/DC mode, press the

0ADJ/RESET key each time the power is turned

on to carry out auto zero adjustment.

When 0 is displayed after zero adjustment, the

measurement can be performed without the

interference of the count remaining immediately

after the power is turned on.

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