Hioki 3286 Instruction Manual

POWER HiTESTER

CLAMP ON

INSTRUCTION MANUAL

3286

Contents

Introduction i
Shipping Check

ii

Safety

iii

Attentions During Use

vii

Organization of This Manual

xii

Chapter 1 Product Outline

1

1.1 Product Outline 1

1.2 Features

2

1.3 Parts and Functions

3

1.4 Flowchart of Key Operations

9

1.4.1 Current Measurements Mode 9

1.4.2 Harmonic Measurement

11

1.4.3 Change the Range

11

Chapter 2 Measurement Procedure 13

2.1 Preparations 13

2.2 Connections

14

2.3 Range Setup

20

2.4 Power Measurement

21

2.4.1 1φφφφ P Meter, 1φφφφ PF Meter and 3φφφφ PF Meter 22

2.4.2 Power and Power Factor

25

2.4.3 Phase Detection

27

2.4.4 Current

28

2.4.5 Voltage

29

2.5 Harmonic Measurement 30

2.5.1 Current Harmonics 30

2.5.2 Voltage Harmonics

32

2.6 Data Hold Function HOLD 33

2.7 SLOW Mode 33

2.8 Recording Function

REC

33

2.9 SETUP Function

35

2.10 Measurement Condition Save Function

36

2.11 Auto Power-Off Function

APS 37

2.12 Battery Low Warning

37

2.13 Beep Tone

37

2.14 DATA OUTPUT

38

Chapter 3 Specifications 39

3.1 Measurement Specifications
(23

5 , 80% RH max.) 39

3.1.1 AC Current Measurement Specifications 39

3.1.2 AC Voltage Measurement Specifications

40

3.1.3 Specifications of Single-phase Power
Measurement 1φφφφ PMeter

41

3.1.4 Specifications of Power Factor

and Phase Angle Measurements
1φφφφ PF Meter and 3φφφφ PF Meter

42

3.1.5 Specifications of Balanced Three-phase

Power Measurements

43

3.1.6 Specifications of Frequency Measurement

44

3.1.7 Specifications of Harmonic Measurement

44

3.2 General Specifications 45

3.3 Operation Expressions

48

Chapter 4 Battery Replacement 51
Chapter 5 Attaching The Hand Strap

53

Chapter 6 Troubleshooting

55

Chapter 7 Service

57

i

Introduction

Introduction

Thank you for purchasing this HIOKI "3286
CLAMP ON POWER HiTESTER." To get the
maximum performance from the product, please read
this manual first, a nd keep this at hand.

Importance

This product is the clamp on power meter which
keeps measurement function of the multiple
functions. If you set up a function mode in
advance, the mode will start up from the next use.
Have it set up for the preferable use. (Refer to "2.10
Measurement Condition Save Function)

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

Shipping Check

Shipping Check

When you receive the product, inspect it carefully to
ensure that no damage occurred during shipping. In
particular, check the accessories, panel switches, a nd
connectors.
If damage is evident, or if it fails to operate
according to the specifications, contact your dealer
or HIOKI representative.

Check the 3286 Unit and the Supplied
Accessories

Main unit

3286 CLAMP ON POWER HiTESTER

Supplied accessories

9355 Carrying Case 1
9635 Voltage cord 1
Hand Strap 1
Battery 6LF22 alkaline battery 1
Instruction manual 1

Options

9636 RS-232C CABLE
9636-01 RS-232C PACKAGE
9442 PRINTER (DPU-414, Seiko Instrument Inc.)

iii

Safety

DANGER

This equipment is designed according to IEC
61010 Safety Standards, and has been tested for
safety prior to shipment. Incorrect measurement
procedures could result in injury or death, as
well as damage to the equipment. Please read
this manual carefully and be sure that you
understand its contents before using the
equipment. The manufacturer disclaims all
responsibility for any accident or injury except
that resulting due to defect in its product.

Safety

This manual contains information and warnings
essential for safe operation of the product and for
maintaining it in safe operating condition. Before
using the product, be sure to carefully read the
following safety notes.

iv

Safety

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 significant danger of accident
resulting in death or serious injury to the
user.

CAUTION

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.

The symbol printed on the product
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 product.

Indicates AC (Alternating Current).
Indicates DC (Direct Current).
Indicates a device which is double-

insulated.

The following symbols in this manual indicate the
relative importance of cautions and warnings.

Safety Symbols

v

Safety

We define measurement tolerances in terms of rdg.
(reading) and dgt. (digit) values, with the following
meanings:

rdg. (reading or displayed value)

The value currently being measured and indicated
on the measuring product.

dgt. (resolution)

The smallest displayable unit on a digital measuring
product, i.e., the input value that causes the digital
display to show a "1".

Overvoltage Categories

To ensure safe use of measurement, IEC 60664
establishes safety level standards for different
locations, classified as CAT I through CAT IV, and
called overvoltage categories. These are defined as
follows.
CAT I: Secondary electrical circuits that are

connected to a wall outlet through a
transformer or similar device.

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.

vi

Safety

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. Use of a lower
category product in a higher category environment
could result in a severe accident and must be
carefully avoided.

vii

Attentions During Use

DANGER

To avoid short circuits and potentially life­threatening hazards, never attach the clamp to a
circuit that operates at more than the maximum
rated voltage / 600V, or over bare conductors.

Clamp-on probe 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.

WARNING

To avoid electric shock, do not allow the
product to get wet, and do not use it when your
hands are wet.

To avoid electric shock when measuring live
lines, wear appropriate protective gear, such as
insulated rubber gloves, boots and a safety
helmet.

Attentions During Use

Follow these precautions to ensure safe operation
and to obtain the full benefits of the various
functions.

viii

Attentions During Use

WARNING

The clamp sensor and voltage cord should be
connected to live lines after being connected to
the unit. To prevent short-circuiting and electric
shock, observe the following precautions:
Do not short-circuit the two wires of a line with
the clip of the voltage cord. Do not use the
clamp sensor on bare conductors.

To avoid electric shock when replacing the
battery, first disconnect the voltage cable or
clamp from the object to be measured. After
replacing the battery, always replace the cover
and tighten the screw before using the unit.

When replacing the battery, be sure to insert
them with the correct polarity. Otherwise, poor
performance or damage from battery leakage
could result. Replace battery only with the
specified type.

To avoid the possibility of explosion, do not
short circuit, disassemble or incinerate
batteries.

Handle and dispose of batteries in accordance
with local regulations.

ix

Attentions During Use

CAUTION

Avoid stepping on or pinching the cable, which

could damage the cable insulation.

Keep the cables well away from heat sources, as
bare conductors could be exposed if the insulation
melts.

If the protective functions of the product are
damaged, either remove it from service or mark it
clearly so that others do not use it inadvertently.

Do not exceed the maximum input current rating,
which depends on the frequency of the current
being measured. Be careful about the evolution of
heat, when the input frequency is high.

2500
2000
1500
1000

500

0

10 100 1k 10k 100k

Frequency [Hz]

Current
(ACA)

x

Attentions During Use

CAUTION

Do not store or use the product where it could be
exposed to direct sunlight, high temperature or
humidity, or condensation. Under such conditions,
the product may be damaged and insulation may
deteriorate so that it no longer meets specifications.

The product is a precision instrument: do not clamp
any foreign objects in the end of the clamp core, or
insert anything in the core gap.

To avoid damage to the product, protect it from
vibration or shock during transport and handling,
and be especially careful to avoid dropping. Do not
exert excessive pressure on the clamp sensor or
attempt to wedge the sensor into a tight spot for
measurement.

Measurements are degraded by dirt on the mating
surfaces of the clamp-on sensor, so keep the
surfaces clean by gently wiping with a soft cloth.

Before using the product 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.

This product is designed for indoor use, and
operates reliably from 0

to 40 .

This product is not designed to be entirely water- or
dust-proof. To avoid damage, do not use it in a
wet or dusty environment.

Adjustments and repairs should be made only by
technically qualified personnel.

xi

Attentions During Use

CAUTION

Do not use the product if the battery is exhausted

(when the

mark lights in the display area). Be sure

to replace the exhausted battery with a new one.

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.

To avoid corrosion from battery leakage, remove the
batteries from the product if it is to be stored for a
long time.

NOTE

Before using the product, make sure that the
insulation on the voltage cable and probes is
undamaged and that no bare conductors are
improperly exposed. Using the product in such
conditions could cause an electric shock. Replace
the test leads and probes with the specified HIOKI
Model 9635.

Accurate 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 clean the product, wipe it gently with a soft
cloth moistened with water or mild detergent.
Never use solvents such as benzene, alcohol,
acetone, ether, ketones, thinners or gasoline, as they
can deform and discolor the case.

xii

Organization of This Manual

Organization of This Manual

Chapter 1
Product Outline

Explains the parts and functions of the unit.

Chapter 2
Measurement Procedure

Explains how to use the 3286 for measurement.

Chapter 3
Specifications

Lists the specifications of the 3286 CLAMP ON
AC/DC HiTESTER.

Chapter 4
Battery Replacement

Explains how to replace the battery used to power
the 3286.

Chapter 5
Attaching the Hand Strap

Explains how to attach the hand strap, for easy
handling of the unit in the field.

Chapter 6
Troubleshooting

Describes how to check before requesting service.

Chapter 7
Service

Explains how to get the unit serviced.

1

Chapter 1 Product Outline

Chapter 1

Product Outline

1.1 Product Outline

The "3286 CLAMP ON POWER HiTESTER" is
designed to provide multiple functions by adopting
a single-chip microcomputer. At any desired point
of a single-phase circuit or three-phase circuit, this
unit enables the measurement of voltage, current,
power, power factor, phase angle, reactive power or
frequency, and the detection of phase sequence on
live lines.
When this unit is connected to the 9442 printer
(DPU-414, Seiko Instrument Inc.) by a 9636 RS­232C cable (both purchased separately), the
products DATA OUTPUT function can be used to
output data to the printer.

2

Chapter 1 Product Outline

1.2 Features

A multi-function microcomputer

The built-in microcomputer offers various functions
in a compact form.

Display of true rms values

The true rms value conversion circuit allows
accurate measurement of currents with distorted
waveforms.

Enables power measurement

When both current and voltage are input
simultaneously, the power factor, phase angle,
reactive factor, as well as power can be measured,
and phase detected.

Enables harmonic measurement

Higher harmonics of current and voltage up to the
20th order can be measured. Moreover, overall
harmonic distortion factors and content can be
displayed.

DATA OUTPUT function

Data can be output when the unit is directly
connected to a printer. This function requires the
optional 9442 printer (DPU-414, Seiko Instrument
Inc.) and 9636 RS-232C cable.

3

Chapter 1 Product Outline

Top and Side View

1
2
3
4

5
6

9
8

13

14

10

11

15

16

12

7
17

1.3 Parts and Functions

4

Chapter 1 Product Outline

1.

POWER

Used to turn power on/off

2.

Watt

key

Used to select the display of active power, apparent
power, or power factor for the 1φ P meter.
Used to select the display of power factor, phase
difference, or reactive factor for the 1φ PF meter.
Used to select the display of active power, apparent
power, power factor, phase difference, or reactive
factor for the 3φ PF meter.

3.

RANGE

key

Displays the current and voltage ranges, and enables
the setting of these ranges. (The

U/

and

I/

keys are used to set these ranges.)

4.

HOLD

key

Holds the indicated value.
Used for the measurement condition save function.
Holding down the

HOLD

key when powering off:
The measurement conditions are saved to the
internal memory when powering off. The
measurement conditions are automatically restored
when powering on.

Holding down the

HOLD

key when powering on:
Measurement conditions are reset to the initial
values.

5.

LINE/HARM

key

Cycles through single-phase power measurement,
three-phase power measurement, current harmonic
measurement, and voltage harmonic measurement.

5

Chapter 1 Product Outline

6.

U/

(RANGE) key

Selects voltage display mode. Pressing this key in
voltage display mode resets the peak-hold value.
Switches MAX/MIN display of effective value and
peak value during REC.
Enables the setting of a voltage range in range setup
mode.
Lowers the order in harmonic display mode.

7.

I/

(RANGE) key

Selects current display mode. Pressing this key in
current display mode resets the peak-hold value.
Switches MAX/MIN display of effective value and
peak value during REC.
Enables the setting of a current range in range setup
mode.
Raises the order in harmonic display mode.

8.

MAX/MIN

(SET2) key

Switches the REC function on and off.

9.

MODE

(SET1) key

Pressing this key in power display mode switches
between current/voltage display and reactive power
display.
Pressing this key during harmonic measurement
switches between overall harmonic distortion factor
display (THD-R, THD-F) and harmonic content
display.
Pressing this key during REC lets you to check the
elapsed time and remaining battery capacity.
Used to start SETUP. (The unit is powered on with
the

SET1

key held down.)

6

Chapter 1 Product Outline

10. Clamp sensor

To measure current, open the top ends of the clamp
sensor by gripping the lever 11. Then position the
conductor to be measured at the center of the clamp
sensor and firmly close the clamp sensor.

11. Lever

Used to open and close the clamp sensor.

12. Current direction mark

When measuring power, clamp the conductor with
the arrow facing the load side.

13. Data Output terminal

Connected to the optional 9636 RS-232C cable to
provide output.

14. Voltage measurement terminal

Connected to the 9635 test lead (red and black,
supplied with the unit) to measure voltage and
harmonic.

15. Back case

To replace the battery, remove the two screws.

16. Hand strap

Attach to get a better grip on the unit.

7

Chapter 1 Product Outline

Display 1

Display 2 Display 3

17. Display (LCD)

Alternating Current (AC)

cosφφφφ Power factor
sinφφφφ Reactive factor

HOLD

Data hold function

DATA

Data output

RST Three-Phase

Reverse phase
Normal phase

Missing phase

APS

Auto power off function

S Slow
REC Record function
LEAD Lead phase
LAG Lag phase

Battery low warning

Phase angle (deg.)

A Current
PEAK Wave peak value

8

Chapter 1 Product Outline

W Active power
VA Apparent power
V Voltage
MAX Maximum value
MIN Minimum value

% Harmonic percentage
%THD Total harmonic distortion ratio
Hz Frequency

var (reactive power)

Total harmonic distortion ratio-F

(A distortion rate against the basic wave.)

Total harmonic distortion ratio-R

(A distortion rate toward the actual
effective value.)