HIOKI HIOKI CM4002 User guide

CM4002

HIOKI CM4002A961-02

CM4003

AC LEAKAGE
CLAMP METER

Dec. 2021 Revised edition 2
CM4002A961-02 21-12H

Instruction Manual

Read carefully before use.

Keep for future reference.

EN

HIOKI CM4002A961-02

Checking Package Contents

HIOKI CM4002A961-02

Main body Accessories



AC Leakage Clamp Meter



CM4003CM4002

(equipped with

output function)

LR6 Alkaline batteries ×2



C0203 Carrying Case



Instruction Manual (this manual)

Please visit Hioki’s website to download other

language versions in PDF format. (p. 1)



Operating Precautions
(0990A907)

CM4002A961-02

Accessories



L9097 Connection Cable

CM4003

(approx. 1.5 m)



L9510 USB Cable
(Type-A to Type-C, 1.0 m)

i

Details of Intended Operations

HIOKI CM4002A961-02

Setting the range

Installing the batteries and Z3210 Wireless Adapter

Performing long-duration measurement using an external power supply

Locating an insulation failure (identifying GFCI and RCD trip events)

Reducing the e󰀨ects of noise (lter function)

Freezing the readouts to take readings (hold function)

Viewing the maximum, minimum, average, and peak values of the measured data

Receiving an alarm if a measured value exceeds the threshold value
(comparator function)

Checking for intermittent leakage

• Using the output function to perform monitoring with a recorder

• Using the GENNECT Cross app to perform monitoring (event recording function)

Using the wireless communications (GENNECT Cross, HID function)

ii

CM4003

CM4003

p. 20

p. 25, p. 29

p. 30

p. 38

p. 41

p. 43

p. 46

p. 48

p. 51
p. 62

p. 58

Checking Package Contents .........................................................................................i

HIOKI CM4002A961-02

Details of Intended Operations ..................................................................................... ii

Introduction ...................................................................................................................1

Overview ...........................................................................................................4

Principle of leakage current measurement ........................................................5

Notations ......................................................................................................................6

Options .........................................................................................................................9

Safety Information ......................................................................................................10

Operating Precautions ................................................................................................14

Part Names.................................................................................................................18

Operation Keys ...........................................................................................................20

Display Panel..............................................................................................................22

Contents

iii

Contents

HIOKI CM4002A961-02

1 Preparing for Measurement 25

1.1 Installing Batteries and the Z3210 Wireless Adapter ......................................25

Installation/replacement procedure .................................................................29

1.2 Using an External Power Supply

1.3 Inspection Prior to Measurement ....................................................................31

2 Performing Measurement 33

2.1 Measuring Leakage Current ............................................................................33

Measurement procedure .................................................................................34

Locating an insulation failure (identifying GFCI and RCD trip events) ............38

Precautions for measuring the load current ....................................................40

2.2 Filter Function (FILTER) ..................................................................................41

2.3 Hold Function (HOLD) .....................................................................................43

2.4 Max., Min., Average, and Peak Values (MAX/MIN) .........................................46

2.5 Inrush Current Measurement (AC INRUSH) ...................................................47

2.6 Comparator Function (COMP) ........................................................................48

2.7 Simple event recording function ......................................................................49

iv

CM4003

.......................................................30

2.8 Output function (OUTPUT)

HIOKI CM4002A961-02

Output rate (A-to-V conversion ratio) ..............................................................52

Setting the output function (RMS/WAVE) ........................................................53

2.9 Auto-Power Save Function (APS) ...................................................................55

2.10 Backlight ..........................................................................................................56

Display backlight .............................................................................................56

Warning backlight ............................................................................................57

2.11 Wireless Communications Function ................................................................58

Using GENNECT Cross ..................................................................................58

Z3210-to-Excel

(Excel

2.12 Power Key Combinations ................................................................................67

3 Specications 69

3.1 GeneralSpecications ....................................................................................69

3.2 Input,Output,andMeasurementSpecications .............................................72

Accuracy list ....................................................................................................76

Outputspecications

Contents

CM4003

................................................................51

®

®

direct input function, HID function) .....................................................63

direct data entry function

CM4003

..........................................................................81

v

Contents

HIOKI CM4002A961-02

3.3 Compatibility with IEC/EN 61557-13 ...............................................................82

4 Maintenance and Service 83

Calibration .......................................................................................................83

Cleaning ..........................................................................................................83

Disposing of the Instrument ............................................................................83

4.1 Troubleshooting...............................................................................................84

Before sending the instrument to be repaired .................................................84

4.2 Error Displays ..................................................................................................88

Index 89

WarrantyCerticate

vi

Introduction

HIOKI CM4002A961-02

Introduction

Thank you for choosing the Hioki CM4002/CM4003 AC Leakage Clamp Meter. To ensure your
ability to get the most out of this instrument over the long term, please read this manual carefully
and keep it available for future reference.
Carefully read the separate document entitled “Operating Precautions” before use.

Latest edition of instruction manual (multilingual)

The contents of this manual are subject to change, for example as a result of

product improvements or changes to specications.

The latest edition as well as multilingual editions of the manual (in Chinese,
French, German, Italian Korean, and Spanish) can be downloaded from
Hioki’s website.

https://www.hioki.com/global/support/download

1

Introduction

HIOKI CM4002A961-02

Intended audience

This manual has been written for use by individuals who use the product or provide information
about how to use the product. In explaining how to use the product, it assumes electrical
knowledge (equivalent of the knowledge possessed by a graduate of an electrical program at a
technical high school).

Trademarks

• Microsoft Excel is a registered trademark or a trademark of Microsoft Corporation in the
United States and other countries.

• The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc.
and any use of such marks by Hioki E.E. Corporation is under license. Other trademarks and
trade names are those of their respective owners.

2

HIOKI CM4002A961-02

Introduction

3

Introduction

HIOKI CM4002A961-02

Overview

This AC leakage clamp meter allows you to measure from minute leakage current to load
current.

Accurately measuring minute leakage current

• The 6.000 mA range is incorporated to ensure the measurement with a high resolution of
1 µA.

• High permeability magnetic material is used for the jaws.

E󰀨ects of external electromagnetic noise are minimized to enable the measurement with

high reproducibility.

Measuring a wide range of current from leakage current to load

current

• Accuracy ranging from 0.060 mA to 200.0 A is ensured.

• Frequency band ranging from 15 Hz to 2 kHz

For more information, please visit our website.

GENNECT Cross > Learn instruments
> Leakage current measurement

https://gennect.net/en/cross/leakage-current-measurement

4

Principle of leakage current measurement

HIOKI CM4002A961-02

Introduction

The instrument is designed based on the
principle of electromagnetic induction. The

magnetic ux corresponding to the current
owing through the conductor to be measured

is detected by a current transformer that
consists of a magnetic core and coil. The
current transformer generates the current

corresponding to the magnetic eld (secondary

current). The detection resistor converts this
secondary current into the voltage to calculate

the value of the current owing through the

conductor.

Magnetic ux corresponding
to current being measured

Magnetic core

Current to be
measured

Conductor under
measurement

Secondary
current

Detection
resistor

Coil

5

Notations

HIOKI CM4002A961-02

Notations

Safety notations

In this document, the severity levels of risk and hazard are classied as follows.

DANGER

WARNING

CAUTION

NOTICE

6

Indicates an imminently

hazardous situation that,

if not avoided, will result in
death or serious injury.

Indicates a potentially

hazardous situation that, if

not avoided, could result in
death or serious injury.

Indicates a potentially

hazardous situation that, if

not avoided, could result in
minor or moderate injury.

Indicates potential risks of
damage to the supported
product (or to other property).

IMPORTANT

Indicates a high-voltage

hazard. Failure to verify

safety or improper handling
of the instrument could lead
to an electric shock, burn, or
death.

Indicates information or
content that is particularly
important from the stand
point of operating or
maintaining the instrument.

Indicates an action that must
not be performed.

Indicates an action that must
be performed.

Symbols shown on the instrument

HIOKI CM4002A961-02

Indicates the need for caution or the presence of danger. For more information about locations
where this symbol appears on instrument components, see the “Operating Precautions”

(p. 14), warning messages listed at the beginning of operating instructions, and the

accompanying document entitled “Operating Precautions.”

Indicates AC (Alternating Current).

Indicates that the instrument may be connected to or disconnected from a live conductor.

Indicates an instrument that has been protected throughout by double insulation or reinforced
insulation.

Indicates the limit value of an external magnetic eld specied by IEC/EN61557-13 Class 2.
The use of the instrument in an external magnetic eld of exceeding 30 A/m is outside a
range of IEC/EN 61557-13 Class 2.

Symbols for various standards

Indicates the Waste Electrical and Electronic Equipment Directive (WEEE Directive) in EU
member states.

Indicates that the product conforms to regulations required by the EU Directive.

Notations

7

Notations

HIOKI CM4002A961-02

Screen display

The instrument screen displays the alphanumeric characters as follows.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

1 2 3 4 5 6 7 8 9 0

Accuracy labeling

Hioki expresses accuracy as error limit values specied in terms of percentages of reading and of full scale.

Reading

(display value)

Full scale

(maximum display value)

8

Indicates the value displayed by the instrument. Limit values for reading errors
are expressed as a percentage of the reading (“% of reading” or “% rdg”).

Indicates the maximum display value for each measurement range.
Measurement range values for the instrument indicates that maximum display
value. Limit values for full-scale errors are expressed as a percentage of full
scale (“% of full scale” or “% f.s.”).

Other notations

HIOKI CM4002A961-02

CM4003

APS (bold) The names of elements on the screen are printed in bold.

(p. ) Indicates the page number to reference.

*

Options

The options listed below are available for the instrument. To order an option, please contact your

authorized Hioki distributor or reseller. Options are subject to change. Check Hioki’s website for

the latest information.

Z3210 Wireless Adapter C0203 Carrying Case

9704 Conversion Adapter

(BNC-to-banana plug)

CM4003

Options

Indicates useful advice concerning instrument performance and operation.

Indicates that the item is applicable to the CM4003 only.

Instructs the reader to see below for additional information.

L9097 Connection Cable (Approx. 1.5 m)

CM4003

Z1013 AC Adapter
(power cord included)

CM4003

9

Safety Information

HIOKI CM4002A961-02

Safety Information

This instrument is designed to conform to IEC 61010 Safety Standards and has been thoroughly
tested for safety prior to shipment. However, using the instrument in a way not described in this
manual may negate the provided safety features.
Carefully read the following safety notes before using the instrument.

DANGER

Familiarize yourself with the instructions and precautions in

this manual before use.

Failure to do so could cause improper use of the instrument, resulting in serious
bodily injury or damage to the instrument.

10

Bodily injury

Safety Information

HIOKI CM4002A961-02

WARNING

Do not attempt to modify, disassemble, or try to repair the

instrument.

Doing so could cause serious bodily injury or re.

If you have not used any electrical measuring instruments

before, you should be supervised by a technician who has
experience in electrical measurement.

Failure to do so could cause the operator to experience an electric shock.

Moreover, it could cause serious events such as heat generation, re, and an arc
ash due to a short-circuit.

Protective gear

WARNING

Use appropriate protective insulation.

Performing measurement using this instrument involves live-line work. Failure
to use protective gear could cause the operator to experience an electric shock.
Using protective gear is prescribed under applicable laws and regulations.

Bodily injury, re

Electric shock

Continued on next page →

11

Safety Information

HIOKI CM4002A961-02

Measurement categories

To ensure safe operation of measuring instruments, IEC 61010 species the measurement
categories, which classies testing and measuring circuits into three categories according to the

types of mains circuits to which they are intended to be connected.

DANGER

Do not use a measuring instrument for measurements on

a mains circuit that exceeds the range of the measurement
category rated for the instrument.

Do not use a measuring instrument without a measurement

category rating for measurements on a mains circuit.

Failure to observe this can cause a serious bodily injury and damage to the
instrument and other equipment.

The CM4002 conforms to the safety requirements for CAT IV (300 V) and CAT III (600 V)
measuring instruments.
The CM4003 conforms to the safety requirements for CAT III (300 V) measuring instruments.

12

Bodily injury

Measurement category II (CAT II)

HIOKI CM4002A961-02

Applicable to test and measuring circuits connected directly to utilization points (socket outlets and similar

points) of the low-voltage mains installation.
EXAMPLE: Measurements on household appliances, portable tools, and similar equipment, and on the

consumer side only of socket-outlets in the xed installation.

Measurement category III (CAT III)

Applicable to test and measuring circuits connected to the distribution part of the building’s low-voltage
mains installation.
EXAMPLE: Measurements on distribution boards (including secondary meters), photo voltaic panels,

circuit breakers, wiring, including cables, bus-bars, junction boxes, switches, socket-outlets

in the xed installation, and equipment for industrial use and some other equipment such as
stationary motors with permanent connection to the xed installation.

Measurement category IV (CAT IV)

Applicable to test and measuring circuits connected at the source of the building’s low-voltage mains
installation.
EXAMPLE: Measurements on devices installed before the main fuse or circuit breaker in the building

installation.

Distribution Panel

Service Entrance

Service Drop

CAT IV

Power Meter

Internal Wiring

CAT III

Fixed Installation

CAT II

T

Safety Information

Outlet

13

Operating Precautions

HIOKI CM4002A961-02

Operating Precautions

Observe the following precautionary information to ensure that the instrument can be used safely
and in a manner that allows it to perform as described in its specications. Carefully read the
separate document entitled “Operating Precautions” before use. Use of the instrument should

conform not only to its specications, but also to the specications of all accessories, options,

and other equipment in use.

14

Handling the instrument

HIOKI CM4002A961-02

Operating Precautions

DANGER

Do not use the instrument to measure circuits that exceed its

ratings or specications.

Doing so could cause damage to the instrument or overheating, resulting in
serious bodily injury.

Do not measure any current in excess of the maximum input

current.

Doing so can cause overheating of the sensor, resulting in bodily injury, re, or

damage to the instrument.
The instrument has a maximum input current of 200 A with a frequency of between

40 Hz and 600 Hz. If a current has another frequency, its value the instrument
can measure is limited. See “Frequency derating characteristics” (p. 73) about

current values.

Bodily injury, re

Continued on next page →

15

Operating Precautions

HIOKI CM4002A961-02

WARNING

Do not approach high-voltage equipment or wiring when

performing measurement using a transformer’s ground wire.

Failure to do so could cause the operator to experience an electric shock.

When the ground wire is close to a high voltage live part,

reroute the ground wire before measurement.

Failure to do so could cause the operator to experience an electric shock.

CAUTION



Do not bend or pull on cables at temperatures of 0°C or lower.

The cable is hardened. Doing so could damage the insulation or cause a wire
break, resulting in an electric shock.

NOTICE

Keep the jaws closed when the instrument is not in use.

Leaving the jaws open will cause dust or dirt to settle on the facing core surfaces,
resulting in damage to the instrument.

16

Electric shock

Electric shock

IMPORTANT

HIOKI CM4002A961-02

• Electric circuit on which DC components are superimposed may not be measured accurately.

• Displayed values can frequently uctuate due to induction potential even when no voltage is
applied. This, however, is not a malfunction.

• When the mark blinks, replace the batteries with new ones. The batteries are exhausted.

(p. 29)

Operating Precautions

• Do not allow any foreign object to be caught between the facing core surfaces of
the jaws.

• Do not scratch the facing core surfaces of the jaws.

• Do not touch the facing core surfaces of the jaws with your ngers.

• Do not insert any foreign object into the gap of the jaws.

• Do not drop the instrument.

• Do not subject the instrument to any shock.

Doing so may adversely a󰀨ect the measurement accuracy and open/close operation.

17

Part Names

HIOKI CM4002A961-02

Part Names

Front Rear

3

4

18

1

2

(The illustration shows the CM4003.)

6

5

7

8

6

9

1 Lever

HIOKI CM4002A961-02

2 Power key (p. 20)

3 Jaws (p. 17)

4 Barrier

5 Serial number

The serial number consists of 9-digit numbers.

The rst four digits indicate the year (its rst two digits omitted) and the month of manufacture.

6 Operation keys (p. 20)

7 Display panel (p. 22)

8 Battery cover (p. 29)

9

Cable connection terminal

(p. 30, p. 51)

Part Names

CM4003

19

Operation Keys

HIOKI CM4002A961-02

Operation Keys

Key Press.

Turns on the instrument. (p. 34, p. 67) Turns o󰀨 the instrument.

Freezes the readouts. / Disables the hold function.
(p. 43)

Sets or switches the maximum, minimum, average,

and peak values. (p. 46)

Cycles through the range.

AUTO

Toggles the comparator function on or o󰀨. (p. 48)

20

6.000 mA 60.00 mA 600.0 mA

200.0 A

6.000 A60.00 A

Hold down for

1 s or longer.

Automatically freezes the readouts. /

Disables the auto-hold function.

(p. 43)

Resets the maximum, minimum,
average, and peak value display.

Toggles the lter on or o󰀨. (p. 41)

(The setting is not saved to the
instrument.)

Displays the number of events
recorded by the event recording

function. (p. 62)

1 s

Operation Keys

HIOKI CM4002A961-02

Key Press.

+

Toggles the display backlight on or o󰀨. (p. 56)

+

Hold down for

1 s or longer.

–

–

Toggles the inrush current

measurement (AC INRUSH) on or o󰀨.
(p. 47)

Switches the output function
(OUTPUT).

CM4003

(p. 51)

RMS

(RMS value)

Toggles the wireless communications

function on or o󰀨. (The setting is saved

to the instrument. Available only when
the Z3210 is installed)

(p. 58)

(waveform)

1 s

WAVE

O󰀨

21

Display Panel

HIOKI CM4002A961-02

Display Panel

Dual readouts

1

2 3 4 5 6 7

1

2

3

4

5 APS Automatic power save p. 55

6

7

22

COMP

EVENT

INRUSH

Sub-readout

Main readout

Wireless communications function p. 58

Comparator p. 48

Simple event recording
Event recording

Inrush current measurement (AC INRUSH) p. 47

External power supply

Remaining battery power p. 25

8
9

10

9

CM4003

p. 49
p. 62

p. 30

11

12

13

14

Display Panel

HIOKI CM4002A961-02

8

9

10

11

12

13 EVENT, kHz, mA Measurement unit (same applies to sub-readout) –

14

MAX, MIN, AVG Maximum, minimum, average values

PEAK MAX, PEAK MIN Highest of peak value, lowest of peak value

FILTER

RANGE:AUTO Automatic ranging

RANGE: MANUAL Manual ranging

Peak value of AC inrush current p. 47

AC measurement –

TRIG Event occurrence –

OVER Overload alarm p. 57

REC

HOLD

Recording an event. –

Comparator threshold value p. 48

Freezing the readouts. p. 43

p. 46

Filter function p. 41

p. 20

RMS value output

Waveform output

CM4003

CM4003

p. 51

23

Display Panel

HIOKI CM4002A961-02

24

Preparing for Measurement

HIOKI CM4002A961-02

1

1.1 Installing Batteries and the Z3210 Wireless Adapter

When using the instrument for the rst time, install two LR6 Alkaline batteries. (p. 29) In
addition, check that there is adequate remaining power in the batteries before starting the
measurement.

Appears There is adequate remaining battery power.

Appears As the remaining power decreases, the indicators disappear from the left.

Appears The batteries are exhausted. Replace the batteries in good time.

Blinks The batteries are exhausted. Replace the batteries with new ones.

The CM4003 can be used by connecting an external power supply without installing the batteries.
(p. 30)

When the Z3210 Wireless Adapter (option) is installed, the wireless communications function
can be used. (p. 58)

Continued on next page →

25

Installing Batteries and the Z3210 Wireless Adapter

HIOKI CM4002A961-02

WARNING

Do not short-circuit the battery.
Do not charge the battery.
Do not disassemble the battery.
Do not heat the battery up.
Do not throw the battery into a re.

Doing so can cause the battery to explode, resulting in bodily injury.

Before removing the battery cover, remove the instrument

from an object under measurement and turn o󰀨 it.

Failure to do so could cause the operator to experience an electric shock. When
the instrument is clamped around the object under measurement, the battery
contacts are regarded as high-voltage parts.

26

Bodily injury, electric shock

Installing Batteries and the Z3210 Wireless Adapter

HIOKI CM4002A961-02

WARNING

After replacing the batteries or installing/removing the Z3210

Wireless Adapter, install the battery cover and tighten the
screw.

Use of the instrument with the battery cover removed could result in serious
bodily injury.
Besides, if the screw of the battery cover is not tightened, the cover will not
secured.

Secure the battery cover with the screw attached to the

instrument at the time of shipment.

If the battery cover is secured with another screw, the instrument could be
damaged, resulting in bodily injury. If you have lost the screw or nd that the
screw is damaged, please contact your authorized Hioki distributor or reseller.

Bodily injury, electric shock

Continued on next page →

27

Installing Batteries and the Z3210 Wireless Adapter

HIOKI CM4002A961-02

NOTICE

Do not mix batteries of di󰀨erent ages or types.
Do not use a battery whose recommended service life has expired.
Do not reverse the battery polarity.
Do not leave the exhausted batteries in the instrument.

Doing so may cause the battery to leak, damaging the instrument.

Use the specied type of batteries only (LR6 Alkaline batteries).
Remove the batteries when the instrument is not in use for an

extended period of time.

Failure to do so may cause the battery to leak, damaging the instrument.

Before handling the Z3210, eliminate static electricity on your body

by touching any metallic part, such as a doorknob.

Failure to do so may cause static electricity to damage the Z3210.

• When the

• Before replacing the batteries, turn o󰀨 the instrument.

• Handle and dispose of batteries in accordance with local regulations.

28

mark blinks, replace the batteries with new ones. The batteries are exhausted.

Installing Batteries and the Z3210 Wireless Adapter

HIOKI CM4002A961-02

Installation/replacement procedure

After reading the safety precautions (p. 25), follow the procedure below for installation.

Phillips screwdriver (No. 2)

22

77

Rear

LR6 Alkaline batteries ×2

Remove the instrument from the object under

1

measurement and turn o󰀨 the instrument.

Z3210

66

55

33

44

Loosen the screw and remove the battery cover.

2

Remove the old batteries (when replacing the

3

batteries).

Install new batteries.

4

When installing the Z3210 Wireless Adapter

5

(option), remove the protective cap.

Carefully checking the orientation, insert the Z3210

6

all the way inside.

Install the battery cover and tighten the screw.

7

See “Using the wireless communications function”
(p. 59).

29

Using an External Power Supply

HIOKI CM4002A961-02

1.2 Using an External Power Supply

Use an external power supply for long-term measurement.

CM4003

22

L9097

33

L9510

44

Z1013

66

Power cord

30

CM4003

If the supplied power includes signicant noise, the display may show
several counts or noise may be present in the output.
When the power is being supplied externally, the auto-power save function
will be disabled.

Remove the instrument from the object under

1

measurement and turn o󰀨 the instrument.

Connect the L9097 Connection Cable (included) to the

2

cable connection terminal of the instrument.

Connect the L9510 USB Cable (included) to the USB

3

terminal (Type-C) of the L9097.

Connect the other end of the L9510 USB Cable to the

4

Z1013 AC Adapter (option, power cord included).

Connect the power cord to the Z1013.

5

Connect the power cord to an outlet.

55

6

When you turn on the instrument, the mark will appear.

1.3 Inspection Prior to Measurement

HIOKI CM4002A961-02

Check Inspection details Remedy

Check the following points visually.



• The instrument is not damaged or cracked.

• No internal circuit is exposed.

No segments are missing.



Pressing the

during a power-o󰀨 condition allows all segments to appear

while holding down the



The

Inspection Prior to Measurement

If the instrument is damaged, ask for
repair. Otherwise, the operator may
receive an electric shock.

If any segment is missing, ask for

key while holding down the key

key.

mark does not blink. When the mark blinks, replace

repair.

the batteries with new ones. The
batteries are exhausted.
(p. 25, p. 29)

31

Inspection Prior to Measurement

HIOKI CM4002A961-02

32

Performing Measurement

HIOKI CM4002A961-02

2

2.1 Measuring Leakage Current

DANGER

Inspect the instrument and verify proper operation before use.

Use of the instrument while malfunctioning could result in serious bodily injury. If

you nd any damage, contact your authorized Hioki distributor or reseller.
See “1.3 Inspection Prior to Measurement” (p. 31).

Do not touch the section beyond the barrier during operation.

Doing so could cause electric shock.
See “Part Names” (p. 18).

Bodily injury

33

Measuring Leakage Current

HIOKI CM4002A961-02

Measurement procedure

Turn on the

1

instrument.

Clamp the instrument around the object under measurement.

2

Wear appropriate protective gear such as gloves.

Clamp the instrument so that the object under measurement is located at the center of the jaws.

34

The default setting of the range is AUTO.

Change the range as required. (p. 20)

Current owing direction arrow

Current owing direction

Single-phase 3-wire circuit

HIOKI CM4002A961-02

Measurement using ground wire:

1.

Clamp around only one wire.

Ig: Leakage current

Circuit

breaker

Ig

PE

Measuring Leakage Current

Measurement of zero-phase current:

2, 3.

Clamp around the wires together in a bundle.

2

1

3

Load device

35

Measuring Leakage Current

HIOKI CM4002A961-02

Three-phase 3-wire circuit

Measurement using ground wire:

1, 4.

Clamp around only one wire.

Ig

1

Circuit

breaker

Measurement of zero-phase current:

2, 3.

Clamp around the wires together in a bundle.

2

3

Load device

Ig: Leakage current

Other circuit

• Clamp around two wires together in a bundle in the single-phase 2-wire circuit.

• Clamp around four wires together in a bundle in the three-phase 4-wire circuit. Even when the instrument

cannot be clamped, you can measure leakage current using the ground wire of the equipment instead.

36

PE

4

PE

Read the current value and frequency.

HIOKI CM4002A961-02

3

IMPORTANT

In the following cases, the accurate measurement may not be performed.

• A large current (around 100 A) ows through adjacent wires.

• Special waveforms, such as that owing through the secondary side of the inverter, is measured.

• The jaws are not closed completely.

In particular, if the external dimension of the object under measurement is large, such as when the
instrument is clamped around three-phase wires together in a bundle, make sure that the jaws are closed
completely. If the jaws are even slightly open, errors occur in the measured value and the accuracy

cannot be ensured.

• The leakage current measurement at zero phase is a󰀨ected by the load current. For the degree of

inuence of the load current, see E12 on p. 82.

Measuring Leakage Current

Frequency

RMS value of leakage current

37

Measuring Leakage Current

HIOKI CM4002A961-02

Locating an insulation failure (identifying GFCI and RCD trip events)

By measuring leakage current of the entire circuit using the ground wire of the transformer
(location 1 in the gure on the next page), you can determine the presence or absence of an
earth leakage in accordance with changes in leakage current.
When you nd an earth leakage, perform the bundled measurement of all the wires from the

power supply side toward the load side to locate an insulation failure.

To investigate an intermittent earth leakage, such as intermittent ground-fault circuit interrupter

(GFCI) and residual-current device (RCD) trip events, the following functions are convenient.

Event recording function (p. 62)

When the measured value exceeds the set threshold value, the event data (event occurrence
time, event stop time, and maximum value) can be recorded. The Z3210 Wireless Adapter (option)
is required.
For detail information, please visit our website.

GENNECT Cross > Functions > Event Recording

https://gennect.net/en/cross/event-recording

Output function

You can record the output value with a recorder. (p. 51)

38

CM4003

Measuring Leakage Current

HIOKI CM4002A961-02

Single-phase 3-wire circuit

• If the insulation on the wire has deteriorated at location A in the gure, you can detect the leakage current

through the measurement by clamping around bundled wires, not at location 3 but location 2.

• If the insulation on the load device has deteriorated at location B in the gure, you can detect the leakage
current through the measurement by clamping around the bundled wires, not at location 5 but location 4.

Circuit

breaker

2

3

4 5

Ig

Ig:

Leakage current

PE

1

A

Load deviceLoad device

B

39

Measuring Leakage Current

NO

HIOKI CM4002A961-02

Precautions for measuring the load current

IMPORTANT

Be sure to clamp the instrument around only one conductor wire. Regardless of the

single-phase and three-phase, when clamping around two or more wires together
in a bundle, the load current cannot be measured.

OK

• Special waveforms, such as that owing through the secondary side of the inverter, may not be
measured.

• In accordance with the magnitude of the input current, a sound may be generated from the jaws

due to resonance, but it does not a󰀨ect the measurement.

• When the magnitude of the input current is unknown, disable the lter function and start the
measurement using the auto-range or 200.0 A range.

40

Do not clamp around

NO

two or more wires.

Do not pinch a wire.

NO

k

Gain (dB)

HIOKI CM4002A961-02

Filter Function (FILTER)

2.2 Filter Function (FILTER)

When a switching power supply or an inverter is connected to the same system as the object

under measurement, high frequency components may be superimposed on the leakage current
waveform. Using the lter function can eliminate unnecessary high-frequency components (low­pass lter).

Enable the lter function.

Hold down the key for 1 s or
longer.

1 s

(Holding down the key for
1 s or longer again disables
the function.)

FILTER

will appear.

You can also set the instrument so that the lter function can be enabled or disabled at power-up. (p. 67)

10

5

0

-5

-10

-15

-20
10 100 1 k 10

Frequency characteristic example (6 mA range)

Filter: OFF Filter: ON

Frequency (Hz)

41

Filter Function (FILTER)

HIOKI CM4002A961-02

IMPORTANT

When the lter function is enabled, the instrument may display values lower than

actual values.

If the instrument indicates di󰀨erent measured values depending on the range
selected manually, trust the one measured using the upper range.
For detail information, please visit our website.

GENNECT Cross > FAQ >
Measured values vary greatly depending on the
measurement range of the leakage current meter.

https://gennect.net/en/cross/measured-values-vary-greatly­depending-on-the-measurement-range-of-the-leakage-current-meter

When the lter function is enabled, the frequency band is limited to approx. 180 Hz (−3 dB), which
is equivalent to the frequency band of the general earth leakage circuit breaker.
To analyze the operation of the earth leakage circuit breaker, it is recommended that you use the
lter function.

42

Hold Function (HOLD)

HIOKI CM4002A961-02

2.3 Hold Function (HOLD)

Manual hold Automatic hold (AUTO HOLD)

The display refresh can be stopped at a
desired timing.

Press.
(Pressing the key
again can disable the
function.)

When the measured value is stable, the display

refresh will be stopped automatically.

Hold down the key for 1 s or
longer.

1 s

(Pressing the key again can
disable the function.)

HOLD

will appear.

will be lit.

Before auto-hold

HOLD

will blink.

After auto-hold

will appear.

HOLD

will be lit.

The buzzer will sound.

43

Hold Function (HOLD)

HIOKI CM4002A961-02

Auto-hold conditions

When both the following conditions are satised, the instrument will freeze the readouts.

• The measured value does not uctuate beyond the variation range (see the next page) for a certain period
of time.

• The measured value exceeds the threshold value (see the next page).

The instrument continues to freeze the readouts until the auto-hold conditions are satised again.

Measured
value

Start

44

Auto-hold
Example: 100.0 A

(1) (2)

Stop

Start

Stop

Start

Auto-hold
Example: 50.0 A

(1) Auto-hold is not performed.

(The measured value is not less than the

threshold value.)

(2) Auto-hold is not performed.

(The measured value does not exceed
the threshold value.)

Threshold value

Example: 10.0 A

Time

Stop

: Variation width



: Hold value

Start: Measurement start

Stop: Measurement end

The variation range and threshold value may vary depending on the range.

HIOKI CM4002A961-02

6.000 mA 200 counts or less 300 counts

60.00 mA

600.0 mA

6.000 A

60.00 A

200.0 A

Hold Function (HOLD)

Range Variation width Threshold value

100 counts or less 100 counts

45

Max., Min., Average, and Peak Values (MAX/MIN)

HIOKI CM4002A961-02

2.4 Max., Min., Average, and Peak Values (MAX/MIN)

The maximum, minimum, average, highest peak, or lowest peak values of the measured data
can be displayed. The auto-power save function is disabled. (p. 55)

Clamp the instrument around the object under measurement.

11

Setting the range. (p. 20)

22

Press the MAX/MIN key to enter MAX/MIN mode and

33

switch the display.

44

Main readout:

Maximum, minimum, average, highest
peak value, or lowest peak value

Sub-readout:

Present measured value

The instrument measures the RMS
value.
“AVG” means the average value of all
measured values.

46

If you switch over to MAX or MIN mode while using the auto-range,
the range is xed at the presently set range.

1 s

MAX

MIN AVG PEAK MAX

Freezes the

readouts.

PEAK MIN

PEAK MAX

PEAK MIN

Hold down the key

for 1 s or longer.

MAX

MIN

Cancel

Waveform

Measured
value

(RMS value)

Display refresh
interval

2.5 Inrush Current Measurement (AC INRUSH)

HIOKI CM4002A961-02

The AC inrush current can be measured.

Set the range. (p. 20)

11

Switch over to AC

22

INRUSH mode.

+

Hold down the key for
1 s or longer.

RMS value (INRUSH)

Screen example: 150 A

Peak value of AC inrush current

The inrush measurement range is set as follows in accordance with the
range when the current is measured.

Range when the current is measured INRUSH measurement range

AUTO 200.0 A range

6.000 mA, 60.00 mA 600.0 mA range

600.0 mA, 6.000 A, 60.00 A, 200.0 A

Screen example: 60 A

AC current

Inrush current occurrence
period
(Several tens to several

hundred of milliseconds)

Inrush Current Measurement (AC INRUSH)

Range when the current is
measured

(Inrush current occurs.)

INRUSH

will blink.

Auto-hold of measured value

How to exit AC INRUSH mode

+

For information on the trigger level, see the specications. (p. 73)
An inrush current including DC components cannot be measured

accurately.

Hold down the key
for 1 s or longer.

Exit

47

Comparator Function (COMP)

HIOKI CM4002A961-02

2.6 Comparator Function (COMP)

When a measured value exceeds the threshold value, a buzzer will sound and the warning
backlight (p. 57) will light up. The buzzer sound can also be disabled. (p. 67)
The auto-range cannot be used when the comparator function is enabled.

Enable the comparator function.2 Set the range (main readout).

1

COMP

48

Press.
(Pressing the key
again can disable
the function.)

will appear.

Threshold
value

Present
measured

value

The range is
displayed here
during the
range setting.

6.000 mA 60.00 mA 600.0 mA

200.0 A

Set the threshold value (sub-readout).

3

Increases the value.

REF

Decreases the value.

Holding down the key increases or

decreases the value continuously.

6.000 A60.00 A

Conrm

Conrm

Simple event recording function

HIOKI CM4002A961-02

2.7 Simple event recording function

The instrument can update the maximum value display from the start to the stop of recording.
The blinking red backlight will warn you that the maximum value exceeds the set threshold

value.

Enable the simple event

11

recording function.

In the power-o󰀨 state

+ +

Set the range (main

22

readout).
Set the threshold value
(sub-readout).

(p. 48)

Set the lter.

33

Start recording.

44

or

Switch between on and o󰀨.

Conrm

The buzzer

will sound.

Recording
will start.

49

Simple event recording function

HIOKI CM4002A961-02

Recording in progress

55

Stop recording.

66

Press

To disable the simple event recording function

Cycle the instrument.

50

An event with a duration time of less than 400 ms may not be accurately
measured, failing to detect the event.

Presently
measured value

To freeze the value

Press. (Pressing the key again
can disable the function.)

Maximum value from the recording start

The blinking red backlight will warn you that the maximum value
exceeds the set threshold value.

, , or , and then, within 3 s* Recording stops.

The instrument will reset the maximum value and return to step 4
(Start measurement).

To switch the range or change the threshold value

Press

during step

* If you fail to press

(During recording).

or

(Start measurement).

4

within 3 s, the instrument will return to step 5

Return to step 2 (Set the range,
Set the threshold value).

Output function (OUTPUT)

HIOKI CM4002A961-02

2.8 Output function (OUTPUT)

The voltage corresponding to the measured value can be output. (Procedure: p. 53)

RMS

(RMS value output)

WAVE

(Waveform output)

Use an external power supply for long-term measurement. (p. 30)

• When using the scaling function of a recorder (such as Hioki’s Memory HiCorder), the voltage

value can be converted into the current value on the recorder.

• To identify intermittent earth leakage (occasional earth leakage) events, record the RMS

output with the recorder to check it for temporal uctuations of the leakage current value.

CM4003

Outputs the DC voltage proportional to the RMS value of the measured current.
Recording the voltage with a recorder (such as Hioki’s Memory HiCorder) allows you
to check changes in measured current value visually.

Outputs the AC voltage proportional to the measured current. Observing the voltage
with a recorder (such as Hioki’s Memory HiCorder, etc.) allows you to check the

current waveform visually.

51

Output function (OUTPUT)

HIOKI CM4002A961-02

Output rate (A-to-V conversion ratio)

Range Output rate

6.000 mA 600.0 mV / 6.000 mA ±1.0% rdg ±5 mV

60.00 mA 600.0 mV / 60.00 mA

600.0 mA 600.0 mV / 600.0 mA

6.000 A 600.0 mV / 6.000 A

60.00 A 600.0 mV / 60.00 A

200.0 A 200.0 mV / 200.0 A

The instrument outputs 600.0 mV as the voltage corresponding to the current range’s full-scale count of 6000.
Only when the 200.0 A range is used, the instrument outputs 200.0 mV AC/DC as the voltage that
corresponds to the full-scale count of 2000.
Example: When the 600.0 mA range is used, the instrument outputs 300.0 mV as the voltage that corresponds

to 300.0 mA.

Output response

RMS (RMS value) Refresh rate: 5 times/s

WAVE (waveform) Frequency band: 15 Hz to 15 kHz (within ±3 dB)

52

Output accuracy

RMS (RMS value) WAVE (waveform)

(For the display count)

±3.0% rdg ±10 mV
(45 Hz to 400 Hz)

±5.0% rdg ±10 mV
( 15 Hz to 45 Hz,

400 Hz to 2 kHz)

Continued on next page →

Setting the output function (RMS/WAVE)

HIOKI CM4002A961-02

Follow the instruction below to set the output function.

CM4003

L9097

External power supply

(as required)

11

22

11

Recorder, etc.

Output function (OUTPUT)

Connect the instrument and a device, such as a recorder,

1

using the L9097 Connection Cable (included).

Connect an external power supply as required. (p. 30)

2

Setting the range. (p. 20)

3

If you enable the output function while using the auto­range, the range is xed at the presently set range.

Set the output function.

4

1 s

Hold down
the key for
1 s or longer.

RMS value

output

RMS WAVE O󰀨

Waveform

output

Output

o󰀨

53

Output function (OUTPUT)

HIOKI CM4002A961-02

Precautions for using the output function

• If you enable the output function while using the auto-range (AUTO), the auto-range is

canceled and the range is xed at the presently set range.

• The measured frequency value cannot be output.

• Even when you press the

• Use an instrument (for example, recorder) with a high input-impedance to record the output.

(An instrument with an input impedance of 100 k

• When the output function is enabled, the auto-power save function (APS) is disabled.

Using the lter function can eliminate unnecessary high-frequency components. (p. 41)

54

key, the output voltage is not xed.

or more is recommended.)

Ω

Auto-Power Save Function (APS)

HIOKI CM4002A961-02

2.9 Auto-Power Save Function (APS)

Using the auto-power save function can reduce the battery consumption.
When you turn on the instrument, the auto-power save function is enabled automatically. When
using the instrument continuously for an extended period of time, disable the auto-power save

function.

Enabled
(default setting)

Idle for

about 15

min.

The APS icon will

appear.

Disabling the APS function

In the power-o󰀨 state

+

The APS icon
will hide.

The instrument will be

turned o󰀨 automatically.

Enabling the APS function again

Cycle the instrument.

The APS icon will appear.

55

Backlight

HIOKI CM4002A961-02

2.10 Backlight

Display backlight

When the backlight is lit, the display panel can be seen easily even in a dark place.

Not lit

(Default setting)

* You can disable the automatic backlight shuto󰀨. (p. 67)

56

Lit (in white)

Otherwise, no operation

for about 40 s will

turns o󰀨 the backlight

automatically.*

Warning backlight

HIOKI CM4002A961-02

When any of the following occurs, the backlight will light up or blink in red to warn you.

• When excessive current is input

When the measured current exceeds the measurement range, the full-scale value on the
main readout or sub-readout and

• When the measured current exceeds the measurement range (overrange)

The full-scale value on the main readout or sub-readout and

to an appropriate range.

• When the comparator function detects that the measured value exceeds the threshold value

(p. 48)

O󰀨

The warning backlight operates only for the present measured value. The warning backlight does not operate
for the freezing value and recorded values of the MAX, MIN, AVG, PEAK MAX, and PEAK MIN display

functions.

will blink. Quit the measurement immediately.

OVER

OVER

Lit/Blinking (in red)

Automatically

Backlight

will blink. Switch over

57

Wireless Communications Function

HIOKI CM4002A961-02

2.11 Wireless Communications Function

When the Z3210 Wireless Adapter (option) is installed, the wireless communications function
can be used. Concurrent use of GENNECT Cross and HID function (p. 63) is not available.

Using GENNECT Cross

Using GENNECT Cross allows you to check and record the measured data of the instrument,
and create measurement reports using your mobile device. For details, see the operation guide
for the GENNECT Cross app (free of charge).

• The communication distance is about 10 m with a clear line of sight. The communicable distance may vary
greatly depending on the presence of an obstruction (wall or metallic shielding object) and the distance
between the oor (ground) and instrument. To ensure the stable communication, make sure that the radio
wave intensity is su󰀩cient.

• GENNECT Cross is free of charge. However, the customer is responsible for the cost to download the
application software and connect to the Internet when using the software.

• GENNECT Cross may not operate properly depending on the mobile device.

58

GENNECT Cross special site

https://gennect.net/en/cross/index

Wireless Communications Function

HIOKI CM4002A961-02

• The Z3210 uses the 2.4 GHz band wireless technology.
When there is a device that uses the same frequency band such as a wireless LAN (IEEE 802.11.b/g/n)
near your mobile device, the communication may not be established.

When the instrument is placed on the oor or ground, the communication distance becomes
shorter. It is recommended that you move the instrument from the oor or ground and place it on a
desk or table or hold it by hand.

Using the wireless communications function

Connect the Z3210 Wireless Adapter (option) into the instrument. (p. 29)

1

Install GENNECT Cross on your mobile device.

2

Turn on the instrument, and then enable the wireless communications function.

3

O󰀨

(Default setting)

Hold down the key for

1 s or longer.

The icon will appear.

(Wireless communications function

is enabled.)

Hidden: Wireless communications

1 s

+

Blinking: Communicating with your

function is disabled.

mobile device.

Continued on next page →

59

Wireless Communications Function

HIOKI CM4002A961-02

Start GENNECT Cross and register the connection of the instrument.

4

Tap [Other]. Tap [Instrument Settings]. Choose the instrument you

• When GENNECT Cross is started for the rst time (when there is no registered instrument), the
Instrument Settings screen appears.

• When the instrument is placed near your mobile device, its connection is registered automatically on

the Instrument Settings screen of GENNECT Cross (up to eight instruments).

• Wait for 5 to 30 s until the connection of the instrument is registered after turning on the instrument. If
the connection of the instrument is not registered after 1 minute has elapsed, restart GENNECT Cross

and the instrument.

60

wish to connect.

Choose a measurement function to perform measurement.

HIOKI CM4002A961-02

5

Wireless Communications Function

General measurement

Waveform graph/FFT

Photo drawing function

Event recording (p. 62)

For detail information, please visit our website.

GENNECT Cross > Functions

https://gennect.net/en/cross/function

Logging (recording)

Comparator

Harmonic analysis

Firmware updating of
the instrument

61

Wireless Communications Function

HIOKI CM4002A961-02

Event Recording Function (EVENT)

The event recording function logs the data when measured values exceed a desired threshold
value, which can be set with GENNECT Cross. For details, see the Help function in GENNECT
Cross. The number of recorded events can be checked using the instrument.

Hold down
the key for 1 s
or longer.

1 s

62

Displays the number of
events.

• An event with a duration time of less than

200 ms may not be accurately measured,

failing to detect the event.

• The instrument can record up to 999 events.
The event recording will terminate when the
recorded events reach 999 in number.
When you start another event recording

session, the instrument will delete previously

recorded data.

Z3210-to-Excel® direct data entry function

HIOKI CM4002A961-02

(Excel® direct input function, HID function)

Concurrent use of GENNECT Cross and HID function is not available.
The human interface device (HID) prole, with which the Z3210 Wireless Adapter is equipped, is
a prole same as that wireless keyboards use.

HID ON

HID OFF

The setting whether the HID function has been enabled or disabled will not be saved in the
instrument but in the Z3210.

Wireless Communications Function

Preparatory to data entry, open an Excel® le on your mobile device or computer
and choose a cell. When the instrument’s display freezes, the measured values

will be entered on the cells. The use of this function with the automatic hold

function enabled comes in handy. (p. 43)

When you wish to use GENNECT Cross, disable the HID function.

Measured values can be
entered.

63

Wireless Communications Function

HIOKI CM4002A961-02

Conrming the HID setting

Remove the instrument from the object under measurement and turn o󰀨 the

1

instrument.

Connect the Z3210 Wireless Adapter (option) into the instrument.

2

See “Installation/replacement procedure” (p. 29).

Enable the wireless communications function.

3

Turn on the instrument, and then hold down

Conrm the HID setting.

4

Turn o󰀨 the instrument, and then press

Z3210 will be displayed.

+

+

simultaneously for 1 s or more.

+

. The HID setting saved in the

64

or

To toggle the setting,
go on to the next page.

Toggle the HID setting

HIOKI CM4002A961-02

Turn o󰀨 the instrument, and then press

1

After displaying the following screens in turn, the instrument will be turned o󰀨 automatically.

Turn on the instrument again.

2

Toggle the HID setting.

If the HID function cannot be enabled

Use GENNECT Cross (ver. 1.8 or later) to update the Z3210.

Wireless Communications Function

+

+

.

The instrument will be turned

o󰀨 automatically.

65

Wireless Communications Function

HIOKI CM4002A961-02

IMPORTANT

To switch over from the HID function to GENNECT Cross

If you start GENNECT Cross without canceling the paring between the mobile device and the instrument,
GENNECT Cross may not be able to recognize the instrument as a connectible device. Follow the
procedure below to reconnect the instrument to GENNECT Cross.

1. Use the Bluetooth

2. Disable the Z3210’s HID function. (p. 65)

3. Use the Instrument Setting of GENNECT Cross to reconnect the instrument.

For detail information, please visit the Z3210’s website.

https://z3210.gennect.net

66

®

setting of your mobile device to delete the instrument.

2.12 Power Key Combinations

HIOKI CM4002A961-02

Turn o󰀨 the instrument, and then turn it on again while holding down one or two

operation keys.

Auto-power save (APS) function
(disabled, p. 55)

Model number, rmware version number,
all segments display (p. 22)

Filter function

(enabled/disabled at startup, p. 41)

Buzzer sound (enabled/disabled)

Automatic deactivation of the display

backlight (enabled/disabled, p. 56)

Serial number display

Settings

How to turn on the

instrument

+

+

+

+

+

+

+

Power Key Combinations

Factory-shipped

setting

Enabled Not saved

– –

Disabled at

startup

Enabled Saved

Enabled Saved

– –

Continued on next page →

Saving of

setting

Saved

67

Power Key Combinations

HIOKI CM4002A961-02

Settings

Simple event recording function (p. 49)

Conrmation of the HID setting (p. 64)

How to turn on the

instrument

+

+

+

+

Factory-shipped

setting

–

– –

Saving of

setting

Range

Threshold

value

HID setting (enabled/disabled, p. 65)

68

+

+

O󰀨 Saved

Specications

HIOKI CM4002A961-02

3

3.1 General Specications

Operating environment Indoors, pollution degree 2, altitude up to 2000 m (6562 ft.)

Operating temperature
and humidity range

Storage temperature
and humidity range

Dust resistance and
water resistance

−10°C to 40°C (14°F to 104°F), 80% RH or less (non-condensing)
40°C to 45°C (104°F to 113°F), 60% RH or less (non-condensing)
45°C to 65°C (113°F to 149°F), 50% RH or less (non-condensing)

−30°C to 70°C (−22°F to 158°F), 80% RH or less (non-condensing)

IP40 (with the jaws closed) (EN 60529)
The protection rating for the enclosure of this instrument is *IP40.
*IP40: This indicates the degree of protection provided by the enclosure of the

device for 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

e󰀨ects of water.

69

General Specications

HIOKI CM4002A961-02

Standards Safety EN 61010

Applicable standard IEC/EN 61557-13:2011 Class 2, ≤ 30 A/m

Power supply CM4002 • LR6 Alkaline batteries ×2

Continuous operating
time

Maximum diameter of
measurable conductor

Dimensions Approx. 64W × 233H × 37D mm (2.52″W × 9.17″H × 1.46″D)

Jaw dimensions Approx. 75W × 20D mm (2.95″W × 0.79″D)

Mass Approx. 400 g (14.1 oz.) (Excluding batteries)

70

EMC EN 61326

Rated supply voltage: 1.5 V DC × 2
Maximum rated power: 800 mVA

CM4003 • LR6 Alkaline batteries ×2

Approx. 48 hours (with the Z3210 not installed)
Approx. 30 hours (with the Z3210 installed and while wirelessly communicating)
With the backlight shut o󰀨 and no signal input
Values used for reference purposes at an ambient temperature of 23°C

40 mm

φ

(Excluding those of protrusions, lever, and jaws)

Rated supply voltage: 1.5 V DC × 2
Maximum rated power: 800 mVA

• External power supply (USB power)
Rated supply voltage: 5 V DC
Maximum rated power: 1000 mVA

Product warranty

HIOKI CM4002A961-02

period

Accessories See p. i.

Options See p. 9.

General Specications

3 years or 10,000 cycles of jaws opening/closing operations, whichever is
shorter

71

Input, Output, and Measurement Specications

HIOKI CM4002A961-02

3.2 Input, Output, and Measurement Specications

Basic specications

Measurement parameters AC current ~A

Measurable range See “Accuracy list” (p. 76).

Maximum input current In accordance with the frequency derating characteristics (p. 73)

Maximum rated terminal­to-ground voltage

Measurement method True RMS method

Measurement specications

Display refresh rate AC current

Response time AC current 2.5 s or less

Zero display range 5 counts or less

72

Power frequency Hz

CM4002 300 V AC (Measurement category IV)

CM4003 300 V AC (Measurement category III)

Frequency

The switching time between ranges is not included.

600 V AC (Measurement category III)
Anticipated transient overvoltage 6000 V

Anticipated transient overvoltage 4000 V

5 times/s
1 to 2 times/s

Frequency derating

250

HIOKI CM4002A961-02

characteristics

Crest factor 3 (other than 200.0 A range), 1.5 (200.0 A range)

Peak detection time width 2 ms or more (with lter disabled)

Frequency detection
input level

Inrush trigger level 600.0 mA range Not less than +60.0 mA (peak) or

Input, Output, and Measurement Specications

200

150

100

(A rms)

50

0

10 100 1 k 10 k 100 k

5% or more of f.s. in each range

not exceeding −60.0 mA (peak)

6.000 A range Not less than +0.600 A (peak) or
not exceeding −0.600 A (peak)

60.00 A range Not less than +2.00 A (peak) or
not exceeding −2.00 A (peak)

200.0 A range Not less than +10.0 A (peak) or
not exceeding −10.0 A (peak)

(Hz)

73

Input, Output, and Measurement Specications

HIOKI CM4002A961-02

Accuracy specications

Accuracy
guarantee
conditions

Accuracy
guarantee input
conditions

Measurement
accuracy

E󰀨ect of external
magnetic eld

E󰀨ect of conductor
position

E󰀨ect of radiated
radio-frequency
electro-magnetic
eld

74

Accuracy guarantee period 1 year

Accuracy guarantee period after
adjustment made by Hioki

Accuracy guarantee
temperature and humidity range

Sine wave input
Not exceeding the rated current and the derating curve

See “Accuracy list” (p. 76).

4 mA or less
(In an external magnetic eld of 400 A/m AC with 50 Hz/60 Hz)

Within ±0.1% rdg (less than 100 A)
Within ±0.5% rdg (100 A or more)
(At any position based on the center of the jaws)

Add ±2 mA to the measurement accuracy.
(In a radiated radio-frequency electro-magnetic eld of 10 V/m)

1 year

23°C ±5°C (73°F ±9°F)
80% RH or less (non-condensing)

E󰀨ect of conducted

HIOKI CM4002A961-02

radio-frequency
electro-magnetic
eld

Temperature
coe󰀩cient

Input, Output, and Measurement Specications

Add ±2 mA to the measurement accuracy.
(In a conducted radio-frequency electro-magnetic eld of 10 V)

Add (Measurement accuracy × 0.05)/°C to the measurement accuracy.
(Specied outside a range of 23°C ±5°C)

75

Input, Output, and Measurement Specications

HIOKI CM4002A961-02

Accuracy list

(1) AC current

1. RMS value measurement (Measured value, maximum, minimum, and average)

Range

(Auto-range

threshold value:

Switch over to

higher/lower range)

6.000 mA
(over 6000 counts)

60.00 mA
(over 6000 counts /
less than 540 counts)

600.0 mA
(over 6000 counts /
less than 540 counts)

76

Accuracy guarantee

range

(Resolution)

0.060 mA to 6.000 mA
(0.001 mA)

0.60 mA to 60.00 mA
(0.01 mA)

6.0 mA to 600.0 mA
(0.1 mA)

Accuracy

Measurement accuracy

guarantee

frequency range

15 Hz ≤ f < 45 Hz ±2.0% rdg ±0.005 mA ±3.0% rdg ±0.005 mA

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±2.0% rdg ±0.005 mA –

15 Hz ≤ f < 45 Hz ±2.0% rdg ±0.05 mA ±3.0% rdg ±0.05 mA

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±2.0% rdg ±0.05 mA –

15 Hz ≤ f < 45 Hz ±2.0% rdg ±0.5 mA ±3.0% rdg ±0.5 mA

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±2.0% rdg ±0.5 mA –

Filter disabled Filter enabled

±1.0% rdg ±0.005 mA

±1.0% rdg ±0.05 mA

±1.0% rdg ±0.5 mA

±1.0% rdg ±0.005 mA

±1.0% rdg ±0.05 mA

±1.0% rdg ±0.5 mA

Range

HIOKI CM4002A961-02

(Auto-range

threshold value:

Switch over to

higher/lower range)

6.000 A
(over 6000 counts /
less than 540 counts)

60.00 A
(over 6000 counts /
less than 540 counts)

200.0 A
(less than
540 counts)

Accuracy guarantee

range

(Resolution)

0.060 A to 6.000 A
(0.001 A)

0.60 A to 60.00 A
(0.01 A)

6.0 A to 200.0 A
(0.1 A)

Input, Output, and Measurement Specications

Accuracy

guarantee

frequency range

15 Hz ≤ f < 45 Hz ±2.0% rdg ±0.005 A ±3.0% rdg ±0.005 A

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±2.0% rdg ±0.005 A –

15 Hz ≤ f < 45 Hz ±2.0% rdg ±0.05 A ±3.0% rdg ±0.05 A

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±2.0% rdg ±0.05 A –

15 Hz ≤ f < 45 Hz ±2.0% rdg ±0.5 A ±3.0% rdg ±0.5 A

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±2.0% rdg ±0.5 A –

Measurement accuracy

Filter disabled Filter enabled

±1.0% rdg ±0.005 A

±1.5% rdg ±0.05 A

±1.5% rdg ±0.5 A

±1.0% rdg ±0.005 A

±1.5% rdg ±0.05 A

±1.5% rdg ±0.5 A

77

Input, Output, and Measurement Specications

HIOKI CM4002A961-02

2. Peak value measurement (PEAK MAX / PEAK MIN)

Range

6.000 mA

60.00 mA

600.0 mA

78

Accuracy guarantee

range

(Resolution)

±0.9 mA to ±18.00 mA
(0.01 mA)

±1.8 mA to ±180.0 mA
(0.1 mA)

±18 mA to ±1800 mA
(1 mA)

Accuracy

Measurement accuracy

guarantee

frequency range

15 Hz ≤ f < 45 Hz ±3.0% rdg ±0.05 mA ±4.0% rdg ±0.05 mA

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±3.0% rdg ±0.05 mA –

15 Hz ≤ f < 45 Hz ±3.0% rdg ±0.5 mA ±4.0% rdg ±0.5 mA

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±3.0% rdg ±0.5 mA –

15 Hz ≤ f < 45 Hz ±3.0% rdg ±5 mA ±4.0% rdg ±5 mA

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±3.0% rdg ±5 mA –

Filter disabled Filter enabled

±2.0% rdg ±0.05 mA

±2.0% rdg ±0.5 mA

±2.0% rdg ±5 mA

±2.0% rdg ±0.05 mA

±2.0% rdg ±0.5 mA

±2.0% rdg ±5 mA

Input, Output, and Measurement Specications

HIOKI CM4002A961-02

Range

6.000 A

60.00 A

200.0 A

Accuracy guarantee

range

(Resolution)

±0.18 A to ±18.00 A
(0.01 A)

±1.8 A to ±180.0 A
(0.1 A)

±18 A to ±300 A
(1 A)

Accuracy

Measurement accuracy

guarantee

frequency range

15 Hz ≤ f < 45 Hz ±3.0% rdg ±0.05 A ±4.0% rdg ±0.05 A

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±3.0% rdg ±0.05 A –

15 Hz ≤ f < 45 Hz ±5.0% rdg ±0.5 A ±5.0% rdg ±0.5 A

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±5.0% rdg ±0.5 A –

15 Hz ≤ f < 45 Hz ±5.0% rdg ±5 A ±5.0% rdg ±5 A

45 Hz ≤ f ≤ 66 Hz

66 Hz < f ≤ 400 Hz –

400 Hz < f ≤ 2 kHz ±5.0% rdg ±5 A –

Filter disabled Filter enabled

±2.0% rdg ±0.05 A

±3.0% rdg ±0.5 A

±3.0% rdg ±5 A

±2.0% rdg ±0.05 A

±3.0% rdg ±0.5 A

±3.0% rdg ±5 A

79

Input, Output, and Measurement Specications

HIOKI CM4002A961-02

(2) AC INRUSH (Inrush current)

1. AC INRUSH measured value

Range

600.0 mA 60.0 mA to 600.0 mA (0.1 mA) 40 Hz ≤ f ≤ 1 kHz ±5.0% rdg ±1.0 mA

6.000 A ±0.600 A to ±6.000 A (0.001 A) 40 Hz ≤ f ≤ 1 kHz ±5.0% rdg ±0.010 A

60.00 A ±1.00 A to ±60.00 A (0.01 A) 40 Hz ≤ f ≤ 1 kHz ±5.0% rdg ±0.10 A

200.0 A ±10.0 A to ±200.0 A (0.1 A) 40 Hz ≤ f ≤ 1 kHz ±5.0% rdg ±1.0 A

2. AC INRUSH PEAK value

Range

600.0 mA 60 mA to 1800 mA (1 mA) 40 Hz ≤ f ≤ 1 kHz ±6.0% rdg ±10 mA

6.000 A ±0.60 A to ±18.00 A (0.01 A) 40 Hz ≤ f ≤ 1 kHz ±6.0% rdg ±0.10 A

60.00 A ±1.0 A to ±180.0 A (0.1 A) 40 Hz ≤ f ≤ 1 kHz ±6.0% rdg ±1.5 A

200.0 A ±10 A to ±300 A (1 A) 40 Hz ≤ f ≤ 1 kHz ±6.0% rdg ±15 A

(3) Frequency measurement

Range

(Auto-range threshold value)

999.9 Hz (over 9999 counts) 15.0 Hz to 999.9 Hz (0.1 Hz) ±0.1% rdg ±0.1 Hz

2000 Hz (less than 900 counts) 900 Hz to 2000 Hz (1 Hz) ±0.1% rdg ±1 Hz

80

Accuracy guarantee range

(Resolution)

Accuracy guarantee range

(Resolution)

Accuracy guarantee range

(Resolution)

Accuracy guarantee

frequency range

Accuracy guarantee

frequency range

Measurement accuracy

Measurement accuracy

Measurement accuracy

Output specications

HIOKI CM4002A961-02

Output item RMS (RMS value output)

Output level

(Output rate: p. 52)

Output accuracy RMS: ±1.0% rdg ±5 mV (for the display count)

Output response RMS: Refresh rate: 5 times/s

Output impedance 100

Input, Output, and Measurement Specications

CM4003

WAVE (waveform output)

RMS: 600 mV DC/f.s. (other than 200.0 A range)

200 mV DC/f.s. (200.0 A range)
(outputs a voltage of 1 V when the f.s. of the range is exceeded.)

WAVE: 600 mV AC/f.s. (other than 200.0 A range)

200 mV AC/f.s. (200.0 A range)

WAVE: ±3.0% rdg ±10 mV (45 Hz to 400 Hz)

±5.0% rdg ±10 mV (15 Hz to 45 Hz, 400 Hz to 2 kHz)

WAVE: Frequency band: 15 Hz to 15 kHz (Within ±3 dB)

or less

Ω

81

Compatibility with IEC/EN 61557-13

HIOKI CM4002A961-02

3.3 Compatibility with IEC/EN 61557-13

Specied input range 6 mA to 60 A, 40 Hz to 1 kHz

Intrinsic uncertainty (A) See “Accuracy list” (p. 76).

E󰀨ects of position (E1) Add ±0.1% rdg ±1 dgt.

E󰀨ects of operation voltage (E2) Add ±0.1% rdg ±1 dgt.

E󰀨ects of temperature (E3) Add ±0.05 × (specied accuracy)/°C. < 18°C, > 25°C

E󰀨ects of distortion waveform (E9) Add ±1% rdg.

E󰀨ects of external magnetic eld

(E11)

15 Hz to 400 Hz

E󰀨ects of load current (E12) Add ±10 µA per load current.

E󰀨ects of common mode voltage

(E13)

E󰀨ects of frequency (E14) Add ±1.0% rdg.

Reproducibility (E15) Add ±0.5% rdg.

Percentage operation uncertainty

(B)

82

Class 3 10 A/m: Add ±0.22 mA.
Class 2 30 A/m: Add ±0.65 mA.

Add ±0.5% rdg.

Class 3 10 A/m: Below 15% (measurement current: 6 mA to 10 mA)

Below 10% (measurement current: 10 mA or more)

Class 2 30 A/m: Below 20% (measurement current: 6 mA to 10 mA)

Below 12.5% (measurement current: 10 mA or more)

Maintenance and Service

HIOKI CM4002A961-02

4

Calibration

The calibration interval depends on factors such as operating conditions and environment.
Please determine the appropriate calibration interval based on your operating conditions and
environment and have Hioki calibrate it accordingly on a regular basis.

Cleaning

• If the instrument becomes dirty, moisten a soft cloth with water or a neutral detergent and
gently wipe it clean.

• Keep the facing core surfaces of the sensor heads clean by gently wiping them with a soft dry

cloth. Dirt on the surfaces can adversely a󰀨ect the measurement accuracy.

• Wipe the display panel gently with a soft, dry cloth.

Disposing of the Instrument

Dispose of the instrument in accordance with local regulations.

83

Troubleshooting

HIOKI CM4002A961-02

4.1 Troubleshooting

If damage is suspected, read the "Troubleshooting" section to remedy the problem. If this does
not help you, contact your authorized Hioki distributor or reseller.

Before sending the instrument to be repaired

Problem Cause Corrective action (Reference)

The instrument cannot be
turned on.

The instrument shuts o󰀨

during operation.

The instrument shuts o󰀨

immediately after it has
been turned on.

mark blinks.

The

[bAtt] → [P.oFF] →

shutdown

The range cannot be
changed.

84

The batteries are exhausted. Replace the batteries with new ones.

The instrument has sat idle for about
15 minutes with the auto-power save

function (APS) enabled.

The batteries are exhausted. Replace the batteries with new ones.

The MAX / MIN / AVG / PEAK MAX /
PEAK MIN display function is used.

(p. 29)

Check the settings.

(p. 55)

(p. 29)

Hold down the

longer to reset the function, and then

change the range. (p. 46)

key for 1 s or

Problem Cause Corrective action (Reference)

HIOKI CM4002A961-02

The output rate di󰀨ers from
the specications.

The output is small.

The measured value is
incorrect.

Troubleshooting

The 200.0 A range is used. Check the current range.

The equipment that receives the output
has a low input impedance.

The frequency of the object under
measurement is outside the output

accuracy (15 Hz to 2 kHz) range.

Displayed values can frequently
uctuate due to induction potential
even when no voltage is applied. This,
however, is not a malfunction.

The tip of the jaws is open. Close the jaws.

The jaws are damaged.
When a jaw is damaged or cracked,
the current cannot be measured
accurately.

The 200.0 A has an output rate of
200 mV/f.s. This rate di󰀨ers from the

other ranges’ rates .

Check the input impedance of the
equipment that receives the output.

An input impedance of 100 k

more is recommended.

The frequency band (15 Hz to

15 kHz) shows a band where the

output attenuation is ±3 dB or less.

(p. 81)

–

Have the instrument repaired.

or

Ω

85

Troubleshooting

HIOKI CM4002A961-02

Problem Cause Corrective action (Reference)

The measured value does
not change.

The jaws generate a

sound (vibration) during

measurement.

The wireless
communications cannot be
established.

86

The readouts freeze. Disable the hold function. (p. 43)

When a large magnitude of load
current or a high-frequency current is
measured, resonance sounds may be
generated on rare occasions. There

are individual di󰀨erences in loudness
of the sound, but it does not a󰀨ect the

measurement.

The Z3210 is not installed. Install the Z3210. (p. 29)

The wireless communications function
is disabled.

The settings of the GENNECT Cross
are incorrect.

Enable the wireless communications

function. (p. 59)

Check the settings of the GENNECT
Cross and your mobile device (GPS,

etc.). (See the operation guide for the
GENNECT Cross.)

–

Problem Cause Corrective action (Reference)

HIOKI CM4002A961-02

GENNECT Cross does not
work.

An error is displayed. See p. 88. Have the instrument repaired.

The HID function has been enabled.
If the HID function has been enabled,
the instrument cannot connect with
GENNECT Cross properly.

Troubleshooting

Follow the procedure below
to reconnect the instrument to
GENNECT Cross.

1. Use the Bluetooth setting of
your mobile device to delete the
instrument.

2. Disable the Z3210’s HID function.
(p. 65)

3. Use the Instrument Setting of
GENNECT Cross to reconnect the
instrument.

87

Error Displays

HIOKI CM4002A961-02

4.2 Error Displays

Error display Description Corrective action

Err 001 ROM error (Program)

Err 002 ROM error (Adjustment data)

Err 004 Memory error

Err 008

88

Z3210 communication error
(Connection failure, the Z3210 or hardware
malfunction)

When an error is displayed on the
display panel, repair is required.
Please contact your authorized Hioki
distributor or reseller.

Index

HIOKI CM4002A961-02

A

AC INRUSH ................................................ 47

APS ............................................................ 55

Disabling ................................................. 55

AUTO HOLD ............................................... 43

Auto-power save......................................... 55

Disabling ........................................... 55, 67

Average value ............................................. 46

AVG ............................................................ 46

B

Backlight ............................................... 56, 67

Batteries ............................................... 25, 29

Buzzer sound.............................................. 67

C

COMP ......................................................... 48

Comparator function ................................... 48

D

Display panel .............................................. 22

Dual-readout screen ................................... 22

E

Error display ............................................... 88

EVENT ........................................................ 62

Event recording function ............................. 62

Excel® direct entry function ......................... 63

External power supply ................................ 30

F

FILTER ....................................................... 41

Filter function .............................................. 41

Fluctuation .................................................. 85

Freezing readouts....................................... 43

G

GENNECT Cross ........................................ 58

89

Index

HIOKI CM4002A961-02

H

HID ............................................................. 63

HOLD.......................................................... 43

Auto-hold ................................................ 43

Manual hold ............................................ 43

Human interface device prole ................... 63

I

Identifying GFCI and RCD trip events ........ 38

INRUSH ...................................................... 47

Inrush current ............................................. 47

Inrush function ............................................ 47

Intermittent earth leakage ........................... 38

J

Jaws ........................................................... 19

L

Leakage current...................................... 5, 33

Load current ............................................... 40

Low-pass lter ............................................ 41

90

M

Main readout............................................... 22

MAX ............................................................ 46

Maximum value .......................................... 46

Measurement principle ................................. 5

Memory HiCorder ....................................... 51

MIN ............................................................. 46

Minimum value ........................................... 46

Model Z3210............................. 25, 29, 58, 63

N

Noise .......................................................... 41

O

Operation keys ........................................... 20

Output function ........................................... 51

Output rate.................................................. 52

Output response ......................................... 52

P

Part names ................................................. 18

PEAK .......................................................... 46

Peak value .................................................. 46

Photo drawing function ............................... 61

HIOKI CM4002A961-02

Power key combinations............................. 67

R

Range ......................................................... 20

Recorder ..................................................... 51

RMS ............................................................ 51

S

Serial number ....................................... 19, 67

Simple event recording function ................. 49

Specications ............................................. 69

Sub-readout ................................................ 22

T

Threshold value .......................................... 48

W

WAVE ......................................................... 51

Wireless adapter............................. 25, 29, 58

Wireless communications function ............. 58

Index

91

Index

HIOKI CM4002A961-02

92