Hioki FT6031-50 kit User Manual

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FT6031-50

HIOKI FT6031B961-00

EARTH TESTER

Instruction Manual



July 2020 Edition 1 FT6031B961-00 20-07H

HIOKI FT6031B961-00

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

Verifying Package Contents ..............................................5

Options (sold separately) ..................................................6

Safety Notes ........................................................................ 7

Usage Notes ...................................................................... 10

1 Overview 15

1.1 Overview and Features ................................. 15

Overview ................................................................... 15

Features .................................................................... 15

1.2 Part Names and Functions ........................... 17

1.3 How to Use Carrying Case ...........................24

2 Preparing for Measurement 25

2.1 Attaching/Removing Protector ....................25

2.2 Inserting/Replacing Batteries ......................26

Procedure .................................................................28

2.3 Connecting the Z3210 Wireless Adapter

(Option) ..........................................................29

Procedure .................................................................30

3 Making Measurements 31

3.1 Measurement Procedure ..............................31

3.2 Inspecting Before Use ..................................32

3.3 Setting Up Comparator (PASS/FAIL Test) ... 36

How to set up comparator ......................................... 37

How to disable comparator ....................................... 37

FT6031B961-00

Contents

HIOKI FT6031B961-00

3.4 Precise Measurement for Earth Resistance (Precise Measurement Method,

3-pole Method) .............................................. 38

Performing zero adjustment ...................................... 40

Connecting measurement cables .............................41

Measuring earth resistance ......................................45

Stowing ..................................................................... 48

Continuous measurement function ........................... 49

3.5 SimpliedMeasurementforEarth

Resistance

(SimpliedMeasurementMethod,

2-pole Method) ............................................... 51

Performing zero adjustment ...................................... 54

Connecting test leads ...............................................55

Measuring earth resistance ......................................57

Stowing ..................................................................... 57

3.6 Cautions and Tips for Measurement ...........58

Distance between earthing electrodes ......................58

Location to install auxiliary earthing rod ....................59

How to insert/pull out auxiliary earthing rod .............. 60

3.7 Auto Power Save

(Power-saving Function) ..............................62

3.8 Wireless

Communications F

unction

(GENNECT Cross) ...........................................63

3.9 Activating the LCD All-on Display ...............65

3.10 Displaying the Serial Number ......................66

4 Specications 67

4.1 GeneralSpecications .................................67

4.2 Input, Output, and Measurement

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

Contents

HIOKI FT6031B961-00

5 Maintenance and Service 77

5.1 Repair, Inspection, and Cleaning .................77

5.2 Troubleshooting ............................................79

5.3 Error Display .................................................. 83

6 Appendix 85

6.1 Earth Resistance ........................................... 85

6.2 Measurement Principle ................................. 87

WarrantyCerticate

iii

Contents

HIOKI FT6031B961-00

Introduction

HIOKI FT6031B961-00

Introduction

Thank you for choosing the HIOKI FT6031-50 Earth Tester. 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.

Intended audience

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

Introduction

HIOKI FT6031B961-00

Notations

Safety notations

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

as follows:

Indicates an imminently hazardous situation

DANGER

WARNING

CAUTION

IMPORTANT

that will result in death of or serious injury to the operator.

Indicates a potentially hazardous situation that may result in death of or serious injury to the operator.

Indicates a potentially hazardous situation that may result in minor or moderate injury to the operator or damage to the instrument or malfunction.

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

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 an action that must not be performed.

Indicates an action that must be performed.

Symbols afxed to the instrument

HIOKI FT6031B961-00

Indicates the need for caution or the presence of danger. For more information about locations where this symbol appears on instrument components, see the "Usage Notes" section

(p. 10), warning messages listed at the beginning of operating

instructions , and accompanying the document entitled "Operating Precautions."

Indicates a double-insulated device.

Indicates DC (Direct Current).

Indicates AC (Alternating Current).

Indicates the power button that switches the instrument between on and off states.

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.

Other notations

Instructs the reader to see below for additional information.

Indicates the page number to reference.

(p.)

Operation key names are highlighted in bold.

Introduction

HIOKI FT6031B961-00

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

Hioki expresses accuracy as error limit values specied in terms of

percentages relative to reading and full scale, and digits.

(Displayed value)

Reading

Full scale

Digits

Refers to the displayed value of the measuring instrument. The limit values of reading errors are expressed in percent of reading (% of reading, % rdg).

(Maximum displayable value) Refers to the maximum displayable value of each measurement range. The instrument has measurement ranges whose values are equal to the maximum displayable values. The limit values of full-scale errors are expressed in percent of full scale (% of full scale, % f.s.).

(Resolution) Refers to the smallest change in the indication on the digital measuring instrument, i.e., the numeral one in the rightmost place. The limit values of digit errors are expressed in terms of digits (dgt).

Verifying Package Contents

HIOKI FT6031B961-00

Verifying Package Contents

When you open the package, carefully inspect the instrument to ensure that everything is in good condition, and that no damage occurred during shipping. Carefully check the accessories, panel keys, and connectors. If the instrument seems to have been

damaged or does not work as specied, contact your authorized

Hioki distributor or reseller.

Check the package contents as follows.

FT6031-50

L9840 Auxiliary Earthing Rod

L9841 Measurement Cable

L9842-11 Measurement Cable

L9842-22 Measurement Cable

C0106 Carrying Case ×1

Protector

AA alkaline battery (LR6) ×4 Instruction Manual Operating Precautions (0990A907)

Accessories

(2 piece set) ×1

(alligator clip, black 4 m) ×1

(yellow 10 m, equipped with winder) ×1

(red 20 m, equipped with winder) ×1

Options (sold separately)

HIOKI FT6031B961-00

Options (sold separately)

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. Please check Hioki's website for the latest information.

L9787 Test Lead

L9840 Auxiliary Earthing Rod

L9841 Measurement Cable

L9842-11 Measurement Cable

(for simplied measurement method,

indoor use only, red and black 1.2 m each)

(for precision measurement method, 2 pcs in 1 set) (φ 6 mm, entire length of 270 mm, straight section 235 mm, material: stainless SUS304)

(for precision measurement method, alligator clip, black 4 m)

(for precision measurement method, yellow 10 m, equipped with winder)

L9842-22 Measurement Cable

L9843-51

L9843-52

L9844 Measurement Cable

9050 Earth Nets

C0106 Carrying Case

Z3210 Wireless Adapter

(for precision measurement method, red 20 m, equipped with winder)

Measurement Cable (for precision measurement method,

yellow 50 m, equipped with at cable winder)

Measurement Cable (for precision measurement method,

red 50 m, equipped with at cable winder)

(for earthing terminal board, alligator clip, 3 cables in 1 set, red/yellow/black 1.2 m each)

(2 sheets in 1 set, 300 mm × 300 mm)

Safety Notes

HIOKI FT6031B961-00

Safety Notes

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

Mishandling during use could result in injury or death, as well as damage to the instrument. Familiarize yourself with the instructions and precautions in this manual before use.

WARNING

Electricity can potentially cause serious events such as an electric shock, heat generation, re, and an arc ash due to a short-circuit. If you have not used any electrical measuring instruments before, you should be supervised by a technician who has experience in electrical measurement.

Safety Notes

HIOKI FT6031B961-00

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. Failure to observe this can cause a severe accident.

• Do not use a measuring instrument without a

measurement category rating for measurements on

a mains circuit. Failure to observe this can cause a severe accident.

This instrument conforms to the safety requirements for CAT II 300 V, CAT III 150 V, CAT IV 100 V measuring instruments.

Measurement category II (CAT II)

Applicable to test and measuring circuits connected directly to utilization points (socket outlets and similar points) of the lowvoltage 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.

Safety Notes

HIOKI FT6031B961-00

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), photovoltaic 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

Outlet

Usage Notes

HIOKI FT6031B961-00

Usage Notes

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. Use of the instrument should conrm not only to its specications, but also to the specications of all accessories, options, batteries,

and other equipment in use.

Verifying before usage

DANGER

If the test lead or the instrument is damaged, there is a risk of an electric shock. Perform the following

inspection before use:

• Check that the insulation of the test leads are

neither ripped nor torn and that no metal parts are exposed. Using the instrument under such conditions could result in an electric shock. Replace the test leads with those specied by Hioki.

• Check the instrument for any damage that may have

occurred during storage or shipping, and perform functional checks before use.

Use environment of the instrument

HIOKI FT6031B961-00

WARNING

Installing the instrument in inappropriate locations

may cause a malfunction of instrument or may give

rise to an accident. Avoid the following locations that

are:

• Exposed to direct sunlight or high temperatures

• Exposed to corrosive or combustible gases

• Exposed to strong electromagnetic elds or

electrostatic charges

• Near induction heating systems (such as high-

frequency induction heating systems and IH

cooking equipment)

• Susceptible to vibration

• Exposed to water, oil, chemicals, or solvents

• Exposed to high humidity or condensation

• Exposed to high concentrations of dust particles

CAUTION

• Do not place the instrument on an unstable or uneven surface. Doing so could cause the instrument to fall or turn over, causing bodily injury or damage to the instrument.

Usage Notes

HIOKI FT6031B961-00

The protection rating for the enclosure of the instrument (based on EN60529) is IP65/67*.

CAUTION

Although the instrument has a dust-proof, jet-proof and waterproof structure, it is not for completely shutting out the water intrusion into the inside. Please note that it can be a cause of failure.

*IP65/IP67:

This indicates the degree of protection provided by the enclosure of the device against use in hazardous locations, entry of solid foreign objects, and the ingress of water.

6: Protected against access to hazardous parts with wire

measuring 1.0 mm in diameter. Dust-proof type (Dust shall not penetrate the enclosure.)

5: The equipment inside the enclosure is protected against

the harmful effects of water projected in jets against the enclosure from any direction.

7: Watertight (Quantities of water that may harm the enclosure

when it is temporarily immersed in water shall not penetrate the enclosure.)

For details on the operating temperature and humidity range, see

the specications. (p. 67)

Usage Notes

HIOKI FT6031B961-00

Handling the cables

CAUTION

To prevent cable damage, do not step on cables or pinch them between other objects. Do not bend or pull on cables at their base.

The ends of the L9787 Test Lead and L9840 Auxiliary Earthing Rod are sharp. Be careful to avoid injury.

IMPORTANT

Use only the specied auxiliary earthing rod, cables, and test leads. Using a non-specied cable may result in incorrect

measurements due to poor connection or other reasons.

Precautions during measurement

WARNING

If the instrument is used in locations where the rating indicated on the instrument or cords is exceeded, the

instrument may be damaged resulting in personal

injury. Do not use the instrument in such locations. See “Measurement categories” (p.8)

Precautions during shipment

Be sure to follow these precautions when transporting the instrument:

• Remove accessories and optional equipment from the instrument in order to avoid damage. Additionally, use the original packing materials, and be sure to double box the instrument. Accidental damage suffered in transit is not covered by the warranty.

• Attach a description of the issue when sending out your instrument for repair.

Usage Notes

HIOKI FT6031B961-00

Overview

HIOKI FT6031B961-00

1.1 Overview and Features

Overview

The grounding works applied to the distribution lines and electrical

facilities are essential for preventing electric shock and re as well

as for safeguarding the equipment. The instrument is an earth tester that is fully functional for measuring earth resistance for grounding works. It is capable of providing accurate and highly reliable measurement. The instrument can provide precision measurement (3-pole method)

and simplied measurement (2-pole method).

Features

High accuracy

Auto-range and

auto-check for

auxiliary earthing

electrode

High allowable

earth resistance for

auxiliary earthing

electrode

The accuracy of the 200.0

±1.5% rdg ±4 dgt.

The measurement is performed by simply pressing the MEASURE button. There is no need for cumbersome range-switching. In addition, the earth potential and auxiliary earthing electrode are automatically checked.

The resistance that the auxiliary earthing

electrode can tolerate is now about 10 times

higher than the conventional level. As a result, it can provide measurement under adverse conditions.

range is

Overview and Features

HIOKI FT6031B961-00

Dustproof,

jet-proof and

waterproof

Supplied with

winders

Drop-proof

(when equipped with

a protector)

The instrument can withstand water at a

depth of 1 m for 30 minutes.

The instrument is supplied with useful winders so that it can be easily prepared and packed up before/after measurement.

Its robust structure can withstand a drop from 1 m onto concrete surface.

Part Names and Functions

HIOKI FT6031B961-00

1.2 Part Names and Functions

Front

Cover of the measurement terminals (p. 48)

Protector

Removed when replacing the batteries or attaching

the Z3210. (p. 25, p. 28, p. 30)

Operation buttons

(p. 19)

Measurement terminals

E Connected with the black cable. S(P) Connected with the yellow cable. H(C) Connected with the red cable.

Display

(p. 22)

IMPORTANT

Please do not press the buttons of the instrument with a sharp object. It may damage the instrument.

Part Names and Functions

HIOKI FT6031B961-00

Rear and sides

Battery cover (side view)

Waterproof seal

It needs to be replaced when degraded. Please contact your authorized Hioki distributor or reseller.

Battery cover

Removed when replacing the

batteries or attaching the Z3210. (p. 28, p. 30)

Serial number

Please do not remove the label as it is needed for product control such as product warranty etc.

(The serial number consists of 9 digits. The rst two (from the left)

indicate the year of manufacture, and the next two indicate the month of manufacture.)

Operation buttons

HIOKI FT6031B961-00

Part Names and Functions

HIOKI FT6031B961-00

MEASURE button

• Start/stop for measuring earth resistance

Fn button

• Displays the resistance of each earthing electrode.

(p. 45)

• Display switching (3-pole method, 2-pole method)

• DC/AC auto switching (when measuring earth potential)

• Wireless communications function on/off (Press and hold

for at least 1 s.)* (p. 63)

3P/2P button

• Switches between 3-pole method and 2-pole method.

• Releases the measured value when it is hold and displays the current earth potential value.

• Continuous measurement on/off (Press and hold for at least 1 s.)

Power button

• Power on/off

Live wire warning LED

• For 3-pole method Blinks under any of the following conditions:

• A voltage of 30 V or higher is applied between the S(P) and E terminals.

• A voltage of 85 V or higher is applied between the H(C) and E terminals.

• A voltage of 85 V or higher is applied between the H(C) and S(P) terminals.

• For 2-pole method

Blinks when a voltage of 30 V or higher is applied

between the H(C) and E terminals.

• Lights up during earth resistance measurements.

COMP button

• Sets/cancels comparator setting. (The COMP indicator

lights up/goes off.) (p. 37)

• Wireless communications function on/off (Press and hold

for at least 1 s.)* (p. 63)

0ΩADJ

HIOKI FT6031B961-00

*: With Z3210 installed

• Sets/cancels zero adjustment setting. (Press and hold

for at least 1 s.) (p. 40, p. 53)

Part Names and Functions

button

Part Names and Functions

HIOKI FT6031B961-00

Display

1 2

7 3 4

Comparator comparison result (PASS)

Comparator comparison result (FAIL)

Appears when DC/AC auto-detect setting is enabled for measuring earth potential.

Appears when continuous measurement function is enabled.

3-pole method (p. 38)

2-pole method (p. 51)

Zero adjustment (

COMP

Appears when comparator setting is enabled. (p. 36)

Indicates that the measured value i s being retained.

Appears when earth potential exceeds allowable range.

Indicates wireless communication function status* (p. 63)

Flashes: Communicating Lights up: Wireless function on Lights off: Wireless function off

p. 40, p. 54

)

Part Names and Functions

HIOKI FT6031B961-00

Indicates the battery level. (p. 27)

*: Optional Z3210 Wireless Adapter required separately

See p. 83 for error display.

Appears 30 s before auto-power-save function is activated.

APS

(p. 62)

Indicates where to connect a measurement cable or test lead.

Appears when the resistance of each (auxiliary) earthing

OPEN

electrode is high or a measurement cable is not connected.

Earth resistance of earthing electrode

Earth resistance of auxiliary earthing electrode S

Earth resistance of auxiliary earthing electrode H

Live wire warning indicator (Blinks during earth resistance measurements)

How to Use Carrying Case

HIOKI FT6031B961-00

1.3 How to Use Carrying Case

Please store the instrument, winder and other accessories/options

into the C0106 Carrying Case as shown in the gure below.

• Please do not store commercially available pegs in this carrying case as those have sharp tips. It may damage the case.

• Please do not wash the carrying case.

• Winder

• Auxiliary

Earthing Rod

Earth Tester

Please make sure to retract the winder knob before storing it in the carrying case.

Measurement cable (Black)

Instruction Manual

Preparing for Measurement

HIOKI FT6031B961-00

2.1

Attaching/Removing Protector

Attaching the protector

Tilt the instrument and slide it into the protector, and then push the entire instrument into the protector.

Removing the protector

Hold it with both hands and push the one end of the protector down.

IMPORTANT

If the protector is removed, the drop-proofness (p. 67) will be

void.

Inserting/Replacing Batteries

HIOKI FT6031B961-00

2.2 Inserting/Replacing Batteries

Before using the instrument, insert four AA alkaline batteries (LR6). Before measurements, check that the battery level is sufcient.

When the battery charge is low, replace the batteries.

WARNING

• To avoid electric shock, turn off the instrument and

disconnect the measurement cables or test leads before replacing batteries.

• Batteries may explode if mistreated. Do not short-

circuit,disassemble the batteries, or dispose of

them in re. Do not recharge alkaline batteries.

Handle and dispose of batteries in accordance with local regulations.

• After inserting the batteries, reattach the cover,

screws, and put on the protector before using the instrument.

• To prevent instrument damage or an electric shock,

use only the screws that are originally installed for securing the battery cover in place. If you have lost

any screws or nd that any screws are damaged,

please contact your authorized Hioki distributor or reseller.

Inserting/Replacing Batteries

HIOKI FT6031B961-00

CAUTION

Poor performance or damage from battery leakage could result. Observe the cautions listed below.

• Do no mix old and new batteries, or different types of batteries

• Pay attention to the polarity markings “+” and “–”, so that you do not insert the batteries the wrong way around.

• Do not use batteries after their recommended expiry date.

• Do not leave a depleted batteries inside the instrument.

• Replace batteries only with the specied type.

• Remove the batteries from the instrument if it is to be stored for a long time.

• The indicator ashes when the remaining battery capacity is low. In this case, measurement is not possible. Replace the batteries.

•

After use, always turn off the instrument.

• Although rechargeable batteries (nickel-hydride) can be used for measurement, the battery level indicator will not be accurately displayed.

• When replacing the batteries after cleaning, the replacement should be carried out after the instrument has been completely

dried.

• The operating temperature of the batteries included in the

shipment is −10°C to 45°C (14°F to 113°F). When using the

instrument outside this temperature range, use batteries that can support such a low or high temperature range. (Example: lithium

battery)

Battery warning indicator

Fully charged.

As the battery charge diminishes, black charge bars disappear, one by one, from the left of the battery indicator. The battery voltage is low. Replace the batteries as soon as possible.

(Blinks) The battery is exhausted. Replace the batteries.

Inserting/Replacing Batteries

HIOKI FT6031B961-00

Procedure

You will need:

• Phillips-head screwdriver (No. 2)

• AA alkaline battery (LR6) ×4

Battery Cover

Rear

Turn off the instrument and remove the measurement cables or test leads from the instrument.

Remove the protector. (p. 25)

Unscrew the screws of the battery cover with a Phillipshead screwdriver.

Remove the battery cover.

Do not remove the waterproof seal

from the battery cover. (p. 18)

When replacing the batteries, all of the old batteries should be removed.

Pay attention to the polarities of the batteries when inserting

four new batteries (LR6).

Reattach the battery cover and

tighten the screws.

Attach the protector. (p. 25)

Connecting the Z3210 Wireless Adapter (Option)

HIOKI FT6031B961-00

2.3 Connecting the Z3210 Wireless

Adapter (Option)

The wireless communications function can be used by connecting

the Z3210 Wireless Adapter (option) to the instrument. See “3.8 Wireless Communications Function (GENNECT Cross)” (p. 63).

WARNING

•

To avoid electric shock, turn off the instrument and disconnect the measurement cables or test leads before replacing batteries.

• After connecting the Z3210, reattach the cover,

screws, and put on the protector before using the instrument.

• To prevent instrument damage or an electric shock,

use only the screws that are originally installed for securing the battery cover in place. If you have lost

any screws or nd that any screws are damaged,

please contact your authorized Hioki distributor or reseller.

Connecting the Z3210 Wireless Adapter (Option)

HIOKI FT6031B961-00

Procedure

You will need:

• Phillips-head screwdriver (No. 2)

• Flat-head screwdriver

• Z3210 Wireless Adapter

Turn off the instrument and

Rear

Use a at-head screwdriver or

other suitable tool to remove

the Z3210.

3,8

4,7

remove the measurement cables or test leads from the instrument.

Remove the protector.

(p. 25)

Unscrew the screws of the

battery cover with a Phillipshead screwdriver and Remove the battery cover.

Do not remove the waterproof seal

from the battery cover. (p. 18)

Remove the batteries from

the instrument

Remove the protective cap

with a athead screwdriver.

Exercising care to orient the

Z3210 correctly, install the Z3210 as far as it will go.

Exercising care to the

polarities of the batteries when inserting them to the instrument.

Reattach the battery cover

and tighten the screws.

Attach the protector.

(p. 25)

Making Measurements

HIOKI FT6031B961-00

3.1 Measurement Procedure

Before using the instrument, be sure to read “Usage Notes” (p. 10).

Preparing for measurement

Insert the batteries. (p. 26)

As necessary, have other

Perform the startup check. (p. 32)

Measurement

Turn the power on and select the measurement method.

Connect measurement cables or test leads to the measurement terminals.

Perform zero adjustment. ( 3-pole method [p. 40],

2-pole method [p. 54])

Start the measurement.

optional items available and ready.

Finishing the measurement

Turn the power off and remove measurement cables or test leads from the object under measurement.

Inspecting Before Use

HIOKI FT6031B961-00

3.2 Inspecting Before Use

Check the instrument/device for any damage that may have occurred during storage or shipping, and perform functional checks

before use. If you nd any damage to the instrument, please contact

your authorized Hioki distributor or reseller for repair.

Check items Solution

Is the battery level sufcient?

Is there any missing segment in

the display items?

Is there any damage or crack in

the instrument?

Is there any foreign material

(sand etc.) inside the measurement terminals?

Is there any damage or exposed internal white part or metal in the coating of measurement cable or

test lead?

Check the battery level indicator on the upper right corner while the power has been turned on. If battery level is low. Replace the batteries with new ones.

(p. 26)

Check by activating the LCD all-on display.

(p. 65)

If there is a missing segment, the instrument needs to be repaired.

Conduct visual checking. If damage is found, the not be used and needs to be repaired as it can cause electric shock.

Remove all foreign materials if any. If it cannot be removed, the to be repaired.

If damage is found, it should not be used and needs to be replaced as it can cause electric shock.

is blinking, the

instrument

should

needs

Check items Solution

HIOKI FT6031B961-00

Use the following method to check whether the measurement cable or test lead has a break.

1. For 3-pole method

Press the 3P/2P button to display

For 2-pole method

Press the 3P/2P button to display

2. Connect measurement

cables or test leads to the instrument their tips.

and short circuit

Inspecting Before Use

If not indicating approx. 0

• The measurement cable or test lead has not been fully inserted.

→Fully insert the cord or lead.

• The measurement cable or test lead may have a break.

→ Replace it with another lead that is

specied by Hioki. If the symptom

persists even after the measurement cable or test lead is replaced, the instrument may have a failure. The instrument needs to be repaired.

3. Press the MEASURE button

to check that approx. 0

indicated.

Inspecting Before Use

HIOKI FT6031B961-00

• Connect the instrument to the secondary side of

a distribution panel. If a short-circuit occurs on the secondary side of the distribution panel, the panel will interrupt the short-circuit current. Do not connect the instrument to the primary side of the distribution panel because an unrestricted current

ow can damage the instrument and facilities if a

short-circuit occurs.

• Do not cause a short-circuit between another wire

and the wire to be measured with the test leads. Arcs or such grave accidents are likely to occur.

• To prevent a short-circuit or electric shock, do not

touch the metal part of the connecting test leads tip.

•

To prevent an electric shock, conrm that any of the white or red portion (insulation layer) of the L9787 Test Lead and the L9844 Measurement Cable is not

exposed. If the cable is exposed, do not use the cable.

DANGER

WARNING

Inspecting Before Use

HIOKI FT6031B961-00

WARNING

To prevent an electric shock, observe the following precautions:

• Prior to measurement, please make sure that the

earthing electrode has been disconnected from the distribution system. The Measurement Cables

L9841, L9842-11, L9842-22, L9843-51 and L9843-52

are measurement cables with the maximum rated voltage of 30 V (between input terminals and the

ground) and are designed to measure the earth

resistance of an earthing electrode disconnected from the distribution system.

• Turn off all power before connecting measurement

cables and test leads.

• Connect measurement cables or test leads to

terminals securely. If a terminal is loose, the contact resistance will increase, resulting in overheating,

equipment burnout, or a re.

CAUTION

• To avoid damaging the measurement cables or test leads, unplug them by grasping the connectors, not the cables or cords.

Setting Up Comparator (PASS/FAIL Test)

HIOKI FT6031B961-00

3.3

Setting Up Comparator (PASS/FAIL Test)

The instrument has a comparator function, which can indicate PASS or FAIL with the display indicator and beep. The earth resistance can be measured without setting up the comparator.

The comparator function operates as follows:

Comparison result Display Beep

Measured value ≤Reference value (PASS)

Measured value > Reference value (FAIL)

The comparison reference value can be chosen from the reference values in the following table.

Reference value (Ω)

1 2 3 4 5

6 7 8 9

10 20 30 40 50

60 70 80 90

100* 200 300 400 500 OFF

*: Default

Intermittent

Continuous

Setting Up Comparator (PASS/FAIL Test)

HIOKI FT6031B961-00

How to set up comparator

Press the 3P/2P button to set

or (2-pole method).

Press the COMP button.

The indicator blinks, and the

2,3

The comparator setting is saved even after the power is turned off.

resistance for the comparison reference appears.

Press the COMP button again

and then choose a comparison reference.

If there is no operation for approx. 2 s after

the desired comparison reference has

been chosen, the comparator is enabled and the display.

(3-pole method),

indicator appears in the

How to disable comparator

Press the COMP button while the comparator has been

enabled.

The indicator blinks.

Press the COMP button several times until the OFF

indicator appears on the display.

The comparator will be disabled if no button is pressed for about 2 s after

the OFF indicator appears on the display.

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

3.4 Precise Measurement for Earth Resistance (Precise Measurement Method,

3-pole Method)

WARNING

The instrument can output a voltage of approx. 30 V. Although the instrument has a dustproof, jet-proof and waterproof structure, the instrument should always be dried before using it for measurement so as to avoid electric shock.

CAUTION

Do not connect the measurement cables if any foreign material remains inside the measurement terminals. It may cause failure.

There are two types of measurement method for earth resistance:

precision measurement method (3-pole method) and simplied measurement method (2-pole method), and the precision measurement method (3-pole method) is the basic measurement

method for earth resistance.

The simplied measurement method is used when measurement

cannot be performed by the precision measurement method. The precision measurement is performed by inserting two auxiliary

earthing rods into the ground as shown in the gure on p. 42.

Measurement of large-scale earthing electrodes

When measuring a large-scale earthing electrode such as a mesh earthing electrode, ring earthing electrode, or earthing electrode provided by a large building structure, it cannot be accurately

measured since the H(C) electrode and S(P) electrode come inside

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

the earth resistance area of E electrode.

If long cables are used to avoid the H(C) electrode and S(P)

electrode getting inside the earth resistance area, accurate

measurement cannot be carried out as it is signicantly affected by

noise. Generally, measurement of large-scale earthing electrode requires

a large measurement current of approx. 20 A. Use measuring

instrument designed for measuring large-scale earthing electrodes for this measurement. (No measuring instrument available for this

purpose from Hioki.)

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

Performing zero adjustment

Always perform zero adjustment prior to measurement. The range that the instrument can provide zero adjustment for is 3 Ω or less. If the measured value exceeds 3 Ω, the message Err

0ΩADJ appears and zero adjustment will not be executed.

Remove the cover of the

How to disable zero adjustment

Press and hold the 0

measurement terminals.

Connect black, yellow and red

measurement cables respectively

to E, S(P), and H(C) terminals of

the instrument.

Short-circuit the tips of the three

measurement cables.

Press the Power button to turn it

on.

Press the 3P/2P button to display

Earth potential appears on the display.

Press the MEASURE button.

ADJ button for at least 1 s while

A measured value of approx. 0 Ω appears

in approx. 8 s, and

When the OPEN indicator appears

(p. 23), the measurement cable may not

have been connected to the measurement terminal, or the cable may have a break. Check the connection and perform cable check with a tester etc.

Press the 0ΩADJ button.

adjustment is completed.

(3-pole method).

lights up and then zero

lights up.

is on.

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

Connecting measurement cables

WARNING

• Do not use the instrument to measure circuits that

exceed its ratings or specications. Damage to the

instrument can cause an electric shock.

• To prevent an electric shock, be careful to avoid

shorting live lines with the test leads tip.

•

If the insulation on a cord melts, the metal conductor may be exposed. Do not use any cord whose metal conductor is exposed. Doing so could result in an electric shock, burn, or other hazards.

CAUTION

• To prevent cords damage, do not step on cords or pinch

them between other objects. Do not bend or pull on cords at their base.

• The ends of the auxiliary earthing rod are sharp. Be

careful to avoid injury.

• For safety reasons, when taking measurements,

only use the measurement cables provided with the instrument.

• The cable is hardened in freezing temperatures. Do not

bend or pull it to avoid tearing its shield or causing a break.

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

5 3

Auxiliary Earthing Electrode H

10 m 10 m

Auxiliary Earthing Electrode S

Earthing Electrode E

Black

Yellow

Red

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

Use the measurement cable (black)

to connect between earthing electrode and E terminal.

Carry two winders along to the

measuring location while pulling out the measurement cables.

• Insert the auxiliary earthing rods into a moist layer in the ground. Since the instrument can accept a large resistance of auxiliary earthing electrode, the auxiliary earthing rods do not need to be inserted unnecessarily deep into the ground

• For accurate measurement, the distance between E, S, and H

needs to be approx. 5 m. The measurement cables (yellow) and (red) should be positioned approx. 10 cm away from each other.

Make sure the cables do not tangle or overlap together.

At the location where the

measurement cable (yellow)

has been fully pulled out, insert the auxiliary earthing rod into the ground and connect the

measurement cable (yellow).

Carry the winder (measurement

cable: red) along the straight line

to a further distance between the earthing electrode E and auxiliary earthing electrode S while pulling out the measurement cable.

At the location where the

measurement cable (red) has been

fully pulled out, insert the auxiliary earthing rod into the ground and connect the measurement cable

(red).

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

NOTE

Measurement on concrete

Since concrete is conductive, auxiliary earthing electrodes can be installed on concrete. Place an auxiliary earthing rod on concrete and pour water over it, or cover the auxiliary earthing rod with a wet rag to form an auxiliary earthing electrode. If the earth resistance of the auxiliary earthing electrode is not reduced by

the above methods, place the optional 9050 Earth Nets on concrete and then

position the auxiliary earthing rod on the Earth Nets and pour water over it. Before measurement, allow some time for the water to well soak into the concrete.

• As an alternative to the Earth Nets, a metal plate or aluminum foil etc. may

be used.

• Since asphalt is insulator, it is generally not possible to install the auxiliary

earthing electrode on asphalt. However, measurement may be possible on asphalt that has water permeability.

9050 Earth Nets

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

Measuring earth resistance

Press the Power button to turn it

on.

2 1

The displayed parameter can be changed after measurement. Press the Fn button to switch parameters.

When NOISE appears

If the earth potential is high (25 V rms or 35.4 V peak or higher),

and the earth potential peak value appears on the display. When it is not possible to measure earth resistance.

Since leak current is owing into the earthing electrode, rst

disconnect any electric equipment connected to the earthing electrode and then press the MEASURE button again.

• The instrument automatically detects AC/DC ( / ) of the earth potential. If AC/DC needs to be switched, it can be switched by pressing the while the current earth potential has been displayed.

is on, or when (live wire warning LED) is blinking,

Press the 3P/2P button to display

(3-pole method).

Earth potential appears on the display.

Press the MEASURE button.

Automatically executes the earth potential

check→auxiliary earth resistance check→earth resistance measurement in

sequence. The measurements will be completed in approx. 6 s, and then the measured value appears and

Check the measured value.

lights up.

button

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

• To check earth potential After measurement of earth resistance, press the Fn button while

is lit so that the earth potential will be displayed. When the 3P/2P button so that the retained value is unlocked and the current

earth potential will be displayed.

PENが表示されるとき

is lit, press

When OPEN appears

The instrument automatically check whether or not each earth resistance is within the allowable range by measuring the earth resistance of the auxiliary earthing rod prior to measuring the resistance of the earthing electrode E. If the earth resistance of the auxiliary earthing electrode exceeds the allowable range, the OPEN indicator appears below the measurement terminal that exceeds the allowable range and the earth resistance of the earthing electrode E will not be measured.

Countermeasures when OPEN appears

Take the following actions for the auxiliary earthing rod connected with the measurement terminal for which the OPEN indicator appears:

• Pour water

• Stick in deeper

• Insert the auxiliary earthing rod into another location

• If the clip connecting point is dirty, wipe and clean the auxiliary

earthing rod with a soft cloth.

The Fn button allows to display the earth resistance and earth potential of each earthing electrode.

Earth resistance of earthing electrode E

Earth resistance of auxiliary earthing electrode S

Earth resistance of auxiliary earthing electrode H

Earth potential

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

• The auxiliary earthing electrodes’ earth resistance (RS, RH)

measured values are used to automatically check whether the earthing electrode’s earth resistance (RE) can be measured. RS and RH do not provide the same level of resolution as the earthing electrode’s earth resistance (RE). For the resolution of earth resistance of auxiliary earthing

electrode, see “Specications” (p. 67).

• When the resistance (RH) of auxiliary earthing electrode exceeds

5 kΩ, the display range becomes the range of 200 Ω without displaying the digit of 0.01 Ω even though the resistance of earthing electrode is 20 Ω or less. The following table shows

examples.

If the digit of 0.01 Ω is required, pour some water over the auxiliary earthing rod (H) to reduce the earth resistance to 5 kΩ

or less.

Resistance RH of auxiliary earthing

electrode H

0 to 5 k

to 50 k

5 k

Example of indicated

value (1)

When 9.52

9.52 Ω (Range: 20 Ω) 13.48 Ω (Range: 20 Ω)

9.5 Ω (Range: 200 Ω) 13.5 Ω (Range: 200 Ω)

measured

Example of indicated

value (2)

When 13.48 Ω is

measured

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

Stowing

Cover of the measurement terminals

IMPORTANT

Always t the cover of the measurement terminals immediately

after use. Any foreign object entering the measurement terminal may cause a failure.

Press the Power button to turn it

off.

Remove the measurement

cables from the measurement

terminals and t the cover of the

measurement terminals.

Remove the measurement cables

from the auxiliary earthing rods and pull out the auxiliary earthing rods without bending them.

(See p. 61 for how to pull out.)

Rewind the measurement cables

(red, yellow) with the respective

winders and stow the winders in the carrying case with the auxiliary earthing rods inserted into the winder's holders.

Remove the measurement cable

(black) from the earthing electrode

and fold it, and then stow it into

the carrying case. (p. 24)

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

Continuous measurement function

This function is convenient when you wish to insert an auxiliary earthing rod into the ground while checking measured values.

IMPORTAMT

• Measured values provided by the continuous measurement function may differ from those provided by normal earthing

resistance measurement (p. 45).

• Measured values provided by the continuous measurement function are for reference purposes only. If you require precise values, be sure to measure earthing resistance using the

measurement method described on p. 45.

Enabling the continuous measurement function

Press the Power button to turn it

on.

Press and hold the 3P/2P（CONT）

2 1

button for at least 1 s until the

indicator appears on the

display.

Press the MEASURE button.

The instrument will measure earthing resistance continuously. To switch the parameter displayed during measurement, press the Fn button.

Precise Measurement for Earth Resistance

HIOKI FT6031B961-00

(Precise Measurement Method, 3-pole Method)

Disabling the continuous measurement function

Press the MEASURE button

during continuous measurement.

Continuous operating time

When using four AA alkaline batteries (LR6) (reference value at 23°C)

• Approx. 3.5 hours (3-pole method, auxiliary earthing resistance of 100

• Approx. 3 hours (3-pole method, auxiliary earthing resistance of 100

measuring 10 without Z3210 installed)

measuring 10 with Z3210 installed, using wireless communications)

Continuous measurement will stop.

Press and hold the 3P/2P（CONT）

button for at least 1 s until the

indicator is no longer

shown on the display.

using the 20 Ω range,

Simplied Measurement for Earth Resistance

HIOKI FT6031B961-00

(Simplied Measurement Method, 2-pole Method)

3.5 Simplied Measurement for Earth

Resistance

(Simplied Measurement Method, 2-pole Method)

DANGER

• Use the neutral side (ground side) of the commercial

power supply for this measurement. Prior to connection, use a voltage detector etc. to make sure that it is going to be connected with the neutral side and take caution for electric shock.

• The instrument can be connected to the neutral

side of an outlet with a voltage-to-ground of 300 V or less, or to the wire on the neutral side of the breaker's secondary side with a voltage-to-ground

of 150 V or less. Do not connect with anything other than those specied above. It can be hazardous.

WARNING

• Use the optional L9787 Test Lead for simplied

measurement for safety. Connecting the

Measurement Cables L9841, L9842-11, L9842-22, L9843-51 and L9843-52 to a commercial power

supply may cause electric shock.

• The instrument can output a voltage of approx. 30 V.

Although the instrument has a dustproof, jet-proof and waterproof structure, the instrument should always be dried before using it for measurement so as to avoid electric shock.

Simplied Measurement for Earth Resistance

HIOKI FT6031B961-00

(Simplied Measurement Method, 2-pole Method)

WARNING

• Removable sleeves are attached to the metal pins at

the ends of the test leads. To prevent a short circuit accident, be sure to use the test leads with the sleeves attached when performing measurements in the CAT III measurement category.

See “Measurement categories” (p.8).

• If the sleeves are inadvertently removed during

measurement, stop the measurement.

CAUTION

• When the instrument is set to 2-pole method, even if it is connected to the earth side of a commercial power supply, it will not trigger the earth leakage breaker since the measurement current is suppressed to 4 mA or less. However, do not use this method for measurement at a location where an earth leakage breaker or leakage

relay with the current sensitivity of less than 10 mA has

been installed, since such an earth leakage breaker or leakage relay may be triggered.

• The simplied measurement function of the instrument is a function for measuring earth resistance with small inductance component. Therefore, a resister connected in series with inductance component of 3 mH or more may not be accurately measured.

• When carrying out measurements with the sleeves in place, be careful to avoid damaging the sleeves.

• The L9787 is a test lead specically designed for indoor use. Do not use it outdoor.

Simplied Measurement for Earth Resistance

HIOKI FT6031B961-00

(Simplied Measurement Method, 2-pole Method)

Removing and attaching the sleeves of L9787 Test Lead

CAUTION

The tips of the metal pins are sharp and may cause injury. Do not touch the tips.

• Removing the sleeves Hold the bottom of the sleeves and pull the sleeves off. Safely store the removed sleeves so as not to lose them.

• Attaching the sleeves Insert the metal pins of the test leads into the holes of the

sleeves, and rmly push them all the way in.

What is simplied measurement method (2-pole method)?

Simplied measurement method (2-pole method) is a measurement

method to check the earth resistance of the equipment earthing with an earth system called TT method. In case of not being able to insert an auxiliary earthing rod, the earth resistance is obtained with use of an existing low earthing resistor as an auxiliary electrode.

In this method, the measured value is the sum (Rx+Ro) of the earth

resistances of the object under measurement and existing earthing resistor, according to the measurement principle. Therefore, the earth resistance of the existing earthing resistor used needs to be lower than that of the earthing electrode of the object under measurement.

In the simplied measurement method, the resistance of the earthing element

used is added to the measurement result.

It is very difcult to measure 10

or less in the simplied method

Simplied Measurement for Earth Resistance

HIOKI FT6031B961-00

(Simplied Measurement Method, 2-pole Method)

Performing zero adjustment

The range that the instrument can provide zero adjustment for is 3 Ω or less. If the measured value exceeds 3 Ω, the message Err

0ΩADJ appears and zero adjustment will not be executed.

Remove the cover of the

How to disable zero adjustment

Press and hold the 0

measurement terminals.

Connect the E terminal and

H(C) terminal of the instrument respectively with the L9787 Test Lead (black) and L9787 Test Lead (red).

Press the Power button to turn it

on.

Press the 3P/2P button to display

H(C)

A measured value (approx. 0 V) of the earth

potential appears.

Connect (short-circuit) the tips of

test leads.

Press the MEASURE button.

A measured value of approx. 0 Ω appears

ADJ button for at least 1 s while

in approx. 3 s, and

When the the measurement terminal, a test lead may not have been connected to the measurement terminal, or the lead may have a break. Check the connection and perform cable check with a tester etc.

Press the 0ΩADJ button.

adjustment is completed.

(2-pole method).

lights up and then zero

lights up.

indicator appears below

is on.

Simplied Measurement for Earth Resistance

HIOKI FT6031B961-00

(Simplied Measurement Method, 2-pole Method)

Connecting test leads

WARNING

• Do not use the instrument for measuring the voltage

of commercial power supply.

• If there is a large voltage on the neutral side, (live

wire warning LED) blinks and beep sound goes

off. Immediately remove the test leads from the commercial power supply.

• If the earth potential is high, attention needs to be

paid for the risk of electric shock.

• To prevent an electric shock, do not exceed the

every rating shown on either the instrument or each test lead, whichever is worse.

The gure below shows an example of connection in the case of using a commercial power supply that is grounded on its N (neutral)

side.

Home distribution panel

Master breaker

Earth leakage

breaker

Branch breaker

Pole-mounted transformer

Outdoor Indoor

Central earth terminal

Simplied Measurement for Earth Resistance

HIOKI FT6031B961-00

(Simplied Measurement Method, 2-pole Method)

Use a voltage detector etc. to make

sure that there is no voltage on

3 2

H(C)

the N (neutral) side of commercial

power supply.

Press the Power button to turn it

on.

Press the 3P/2P button to display

(2-pole method).

When (3-pole method) is chosen, the earth leakage breaker etc. may be triggered due to its large measurement current.

Connect the L9787 test lead (black)

with the earthing electrode of object under measurement.

Connect the L9787 Test Lead

(red) with the N (neutral) side of

commercial power supply.

Earth potential appears on the display.

• When

or higher) exists between the earth and the N (neutral) side of commercial power supply. A large leak current may be owing through the earthing

electrode of the object under measurement or through the earthing element of the commercial power supply used for measurement. Therefore, conduct an insulation resistance test or leakage current test etc. In addition, disconnect any electric equipment from the earthing electrode.

• The instrument automatically detects AC/DC of the earth potential.

• If AC/DC needs to be switched during earth potential measurement, it can

be switched by pressing the Fn button.

• After measurement of earth resistance, press the Fn button while

is lit so that the earth potential will be displayed. When press the 3P/2P button so that the retained value is unlocked and the current earth potential will be displayed.

• When

possible to execute earth resistance measurement.

appears, a large earth potential (25 V rms or 35.4 V peak

is lit,

is on, or when (live wire warning LED) is blinking, it is not

Simplied Measurement for Earth Resistance

HIOKI FT6031B961-00

(Simplied Measurement Method, 2-pole Method)

Measuring earth resistance

Press the MEASURE button so that the instrument automatically executes the following measurements in sequence. The measured

value appears in approx. 3 s and

Check earth potential.

Check whether or not the peak value of the earth potential is within the allowable range.

Measure earth resistance.

Measure the sum (Rx + Ro) of the earth resistance of earthing electrode

and the earth resistance on the neutral side of commercial power supply. To switch the parameter displayed during measurement, press the Fn button.

lights up.

Stowing

Press the Power button to turn it off for safety.

Remove the test leads from the measurement terminals and

t the cover of the measurement terminals. (p. 48)

Fold the test leads together and stow it into the carrying

case.

Cautions and Tips for Measurement

HIOKI FT6031B961-00

3.6 Cautions and Tips for Measurement

Distance between earthing electrodes

When the distance between E-H(C) is I m as shown in Figure (a), if

the resistance of the earthing element E is measured while changing the distance x m between the electrodes E-S(P), measurement

results such as shown in Figure (b) are obtained.

Therefore, its error becomes greater as the location of the auxiliary

earthing rod S(P) moves closer to the earthing element E or auxiliary earthing rod H(C). In addition, if the distance between the electrodes E-H(C) is short,

the measurement error is greater as the earth resistance under test

(Rx) and the earth resistance of auxiliary earthing rod (Rc) cannot

be separated from each other. If earthing is provided by a building structure etc. in a large area,

the resistance area of earth resistance (Rx) indicated in Figure (a)

becomes very wide. In order to carry out accurate measurement, the auxiliary earthing

rods (S[P] and H[C]) need to be installed at a location well away from the earthing element (Rx). As to conrm the above, carry out measurements at several locations while moving the location of the auxiliary earthing rod S(P) from the earthing element (Rx) to the auxiliary earthing rod H(C) and check whether or not there is an almost at section shown in Figure (b) in the measured resistance even though the auxiliary earthing rod S(P) has been moved. If no at section is seen, the measurement distance is insufcient.

Move the installation locations of the auxiliary earthing rods (S[P]

and H[C]) to further locations.

Ground

HIOKI FT6031B961-00

Surface

Cautions and Tips for Measurement

Measured Value

Flat Section

Resistance Area of E Electrode

The distance between E-H(C) of the instrument can be up to 50 m by using the optional L9843-51 and L9843-52. In principle, it is possible to carry out measurement even if the distance is more than 50 m. However,

the measurement result cannot be guaranteed.

S(P)

Resistance

Area of H(C)

Electrode

Location to install auxiliary earthing rod

It is ideal to install the auxiliary earthing rod S(P) at the middle point

of the straight line between the earthing element E and auxiliary

earthing rod H(C).

However, if installation is not possible due to an obstacle etc., the measurement error can be reduced by installing the auxiliary

earthing rod S(P) within 29° from the straight line between the earthing element E and auxiliary earthing rod H(C), wherein the location should be outside the radius of 5 m from the earthing element E and auxiliary earthing rod H(C) as shown in the gure.

5 m

S(P) H(C)

29°

5 m

Cautions and Tips for Measurement

HIOKI FT6031B961-00

How to insert/pull out auxiliary earthing rod

How to Insert

The accessory auxiliary earthing rods are suitable for providing auxiliary earthing electrodes and are designed for thickness and hardness that allow insertion into a general ground by hand. Since it is thinner than previous models, it can be inserted into a small gap.

Wear gloves and insert it perpendicular to the ground surface. If the ground is too hard for inserting by hand, use a hammer to perpendicularly drive into the ground. Hammering the auxiliary earthing rod too hard may result in bending it. In case of not going

into the ground with gentle taps, use the optional 9050 Earth Nets

for measurement.

How to pull out

HIOKI FT6031B961-00

• Hold the loop part of the auxiliary earthing rod and pull it out while turning it.

• If it does not come out by hand, put a hard metal bar etc. (other than

auxiliary earthing rod) through the

loop part of the auxiliary earthing rod and pull the auxiliary earthing rod while turning it. If pulling the auxiliary earthing rod with another auxiliary earthing rod put through the loop, it will result in bending it.

• Do not apply force to the auxiliary earthing rod from the side as it may result in bending the auxiliary earthing rod.

Cautions and Tips for Measurement

Auto Power Save (Power-saving Function)

HIOKI FT6031B961-00

3.7 Auto Power Save

(Power-saving Function)

Approx. 10 min after the last operation or the last time (live wire warning LED) turns on or blinks, the auto power save becomes

active and the screen turns off.

How to recover from auto power save

Press the Power button turn the screen on.

How to disable auto power save

Turn the power on while pressing the 0

IMPORTANT

• The settings of an disabled auto power save will not be saved when the power is turned off.

• After use, always turn off the instrument. Even when the auto power save is enabled, the instrument consumes a small amount of the battery power.

ADJ button.

Wireless Communications Function (GENNECT Cross)

HIOKI FT6031B961-00

3.8

Wireless

Communications F

unction

(GENNECT Cross)

When the wireless communications function is enabled, you can review measurement data and create measurement reports on mobile devices. For more information about this functionality, see “GENNECT Cross

Ofcial Website” (application software, free of charge).

GENNECT Cross Ofcial Website

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

Connect the Z3210 Wireless

Flashes:

Communicating

Lights up:

Wireless function on

Lights off:

Wireless function off

To toggle the wireless communications function on and off, press and hold the

Fn button and the COMP

button for at least 1 s.

Adapter (option) to the instrument. (p. 29)

Install the GENNECT Cross on

your mobile device.

Turn on the instrument.

Press and hold the Fn

button and the COMP button simultaneously for at least 1 s to enable the wireless communications function.

When the wireless communications function is on, display.

Launch the GENNECT Cross

and pair it with the instrument.

Select the measurement

function and start measurement.

will ash on the

Wireless Communications Function (GENNECT Cross)

HIOKI FT6031B961-00

• The communication distance is approx. 10 m (line of sight).The distance over which data can be sent and received varies greatly depending on whether there are any obstructions between the

paired instruments (for example, walls, metal barriers, etc.) and on the distance between the instrument and the oor (or ground).

To ensure stable communication, verify adequate signal strength.

• Although the GENNECT Cross is provided free of charge, downloading or using the application software may incur Internet connection charges. Such charges are the sole responsibility of the user.

GENNECT Cross

• The

is not guaranteed to operate on all

mobile devices.

• The Z3210 uses 2.4 GHz band wireless technology. It may not be possible for the device to establish a wireless connection when used in the vicinity of other devices that use the same frequency

band, for example Wi-Fi devices (IEEE 802.11.b/g/n).

• When the app is launched for the rst time (before being paired with any instrument), the instrument settings screen will be

displayed.

• While the mobile device is displaying the GENNECT Cross's instrument settings screen, simply move it close to the instrument to automatically pair it with the instrument (the app can be paired

with up to 8 instruments).

• Allow about 5 s to 30 s for the instrument to pair with the app after being turned on. If the instrument fails to pair within 1 min.,

relaunch GENNECT Cross and cycle the instrument’s power.

Activating the LCD All-on Display

HIOKI FT6031B961-00

3.9 Activating the LCD All-on Display

This section describes how to check for screen issues by enabling all indicators on the LCD display at once.

Turn the power on while pressing the Fn button.

Press any button.

Its normal measurement screen will appear.

Displaying the Serial Number

HIOKI FT6031B961-00

3.10 Displaying the Serial Number

Turn the power on while pressing the 3P/2P button.

The rst 4 digits and the last 5 digits of the serial number (9 digits)

appear alternately.

Press any button.

Its normal measurement screen will appear.

First 4 digits

(Example of a serial number: 200756789)

The 9-digit serial number indicates the year (rst two digits) and the month of manufacture (next two digits).

Last 5 digits

Specications

HIOKI FT6031B961-00

4.1 General Specications

Operating environment

(scope of application)

Operating temperature and humidity range

Storage temperature and humidity range

Dustproof and waterproof

Drop-proofness Drop height: 1 m, impact surface: concrete (with

Standards Safety

Power supply AA alkaline battery (LR6) ×4

Indoor, outdoor (excluding farmland*), pollution degree 3, altitude up to 2000 m (6562 ft.) *: According to the requirements regarding the

regulations for open-circuit voltage in EN 61557-5

−25°C to 40°C (−13°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 50°C (113°F to 122°F): 50% RH or less (non-condensing)

50°C to 55°C (122°F to 131°F): 40% RH or less (non-condensing) 55°C to 60°C (131°F to 140°F):

30% RH or less (non-condensing) 60°C to 65°C (140°F to 149°F): 25% RH or less (non-condensing)

−25°C to 65°C (−13°F to 149°F): 80% RH or less (non-condensing)

IP65/IP67 (EN 60529)

protector attached)

Instrument: EN 61010 Measuring circuit: EN 61010

EMC: EN 61326

Earth tester: EN 61557

Rated supply voltage: 1.5 V DC× 4

Maximum rated power: 3 VA

Available effective battery voltage: 4.5 V ±0.19 V to

6.8 V

General Specications

HIOKI FT6031B961-00

Number of measurements before replacing batteries

Dimensions Approx. 185W × 111H × 44D mm (7.28″W × 4.37″H

Mass Approx. 570 g (20.1 oz.) (including batteries and

Product warranty period

Accessories

Options

When using four AA alkaline batteries (LR6)

(reference value at 23°C)

• 500 measurements (3-pole method, auxiliary earthing resistance of 100 using the 20 intervals, without Z3210 installed)

• 400 measurements (3-pole method, auxiliary earthing resistance of 100 using the 20 intervals, with Z3210 installed, using wireless communications)

× 1.73″D)

(including protector, excluding cover of the measurement terminals)

protector, excluding other accessories)

3 years

See “Verifying Package Contents” (p.5)

See “Options (sold separately)” (p.6)

range, measure on at 10-sec.

, measuring 10 Ω

Input, Output, and Measurement Specications

HIOKI FT6031B961-00

4.2 Input, Output, and Measurement Specications

Basic specications / accuracy specications

Measured parameters

A/D conversion method

Input/output terminals

Maximum rated terminal-toground voltage

Nominal operating ranges

• Earth resistance measurement

• Earth potential measurement

method (peak voltage measurement: sequential

∆Σ

comparison method)

H terminal: Terminal that outputs the measurement

S terminal: Terminal that detects the voltage being

E terminal: Terminal connected to the earthing electrode

100 V AC, DC (measurement category IV) 150 V AC, DC (measurement category III) 300 V AC, DC (measurement category II)

Anticipated transient overvoltage: 2500 V

• Operating temperature and humidity range:

See “Operating temperature and humidity range” in “General Specications” (p. 67).

• Position: Level ±90°

• Power supply voltage: Available effective battery voltage

• Earth potential:

See “Allowable earth potential” in “Basic specications / accuracy specications”.

• Resistance of auxiliary earthing electrode: See

electrode” in “Basic specications / accuracy specications”

• External magnetic eld: 400 A/m or less, DC and frequency 50 Hz/60 Hz

voltage or that detects the voltage being measured (when using the 2-pole method)

measured (when not using the 2-pole method)

being measured to receive the measurement current output from the H terminal

“Allowable resistance of auxiliary earthing

Input, Output, and Measurement Specications

HIOKI FT6031B961-00

Accuracy guarantee conditions

Accuracy guarantee period: 1 year Accuracy guarantee period after adjustment made by Hioki: 1 year Accuracy guarantee temperature and humidity range:

23°C ±5°C (73°F ±9°F), 80% RH or less

Input, Output, and Measurement Specications

HIOKI FT6031B961-00

Measurement of earth resistance

(RE: Earth resistance of object under measurement,

: Earth resistance of H electrode,

: Earth resistance of S electrode)

Conditions: auxiliary earthing electrode resistance 100 Ω ±5%,

Operation system

Measurement system

Output voltage 30 V rms or less and 42.4 V peak or less

Measurement current

Measurement current waveform

Measuring frequency

Measurement time

earth potential 0 V

Voltage application, measurement of voltage and current (Effective resistance is measured by synchronous detection.)

2-pole method / 3-pole method, switchable

3-pole method: 25 mA rms or less

2-pole method: 4 mA rms or less

Sine wave (Distortion factor of 5% or less)

128 Hz ±2 Hz

3-pole method: Within 6 s

2-pole method: Within 3 s

Input, Output, and Measurement Specications

HIOKI FT6031B961-00

Range

conguration

(auto-range)

Phase difference tolerance

Effect of positioning

)

(

Effect of supply

voltage (

)

Effect of temperature

)

(

Display range

Applied

conditions

(RE and RH)

Display range

Resolution

Accuracy

3-pole 0.01

2-pole

(specic uncertainty A)

Allowable

resistance of

auxiliary earthing

electrode

Operation

uncertainty

±30% rdg (applied to 3-pole method)

20 Ω

or less

5 kΩ

or less

0.00 Ω to

20.00

–

±1.5% rdg

±8 dgt

5 k

200 Ω2000

200 Ω or less

50 kΩ

or less

0.0 Ω to

200.0

0.1

±1.5% rdg ±4 dgt

Guaranteed range

of operation

uncertainty

5.00 Ω to 2000

±3.5°

Not applicable due to digital type

Accuracy × 0.5 and within accuracy specications

Accuracy × 1.0 (−10°C to 50°C)

Accuracy × 2.0 (−25°C to −10°C, 50°C to 65°C)

50 k

200

Ω to

2 k

Ω or less

50 kΩ

or less

0 Ω to

2000

Input, Output, and Measurement Specications

HIOKI FT6031B961-00

Effect of earth

potential (

)

Allowable earth potential

Effect of the resistance of auxiliary earthing electrode (

)

Effect of system frequency (

)

Effect of system

voltage (

)

Effect of external magnetic eld

Earth resistance of auxiliary earthing electrode auto-

check

(auto-check after start of measurement)

Auto-check for earth potential

(auto-check after start of measurement)

Overload protection

16 2/3 Hz,

50 Hz, 60 Hz

400 Hz

0 V to 3 V Accuracy × 1.0

3 V to 25 V Accuracy × 2.0

0 V to 3 V Accuracy × 1.0

3 V to 10 V Accuracy × 2.0

0 V to 3 V Accuracy × 1.0

3 V to 5 V Accuracy × 2.0

25 V rms or 35.4 V peak

Either RH or RS electrode Variable value

or less Accuracy × 1.0

10 k

Above 10 k

to 50 k

Accuracy × 2.0

Not applicable

Accuracy × 0.5

Display range

Maximum display

value

Resolution 10 Ω0.1 kΩ1 k

1000 Ω10 kΩ100 kΩ200 k

1000 Ω10.0 kΩ100 kΩ200 k

Accuracy Not specied

Display range 42 V peak

Maximum display

value

42.0 V peak

Accuracy ±2.3% rdg ±8 dgt

360 V AC (for 1 min., between each terminal)

360 V DC (for 1 min., between each terminal)

10 k

Input, Output, and Measurement Specications

cosθ

HIOKI FT6031B961-00

Automatic measurement termination

Effect of earth capacity (2-pole method)

Zero adjustment allowable range

Negative resistance value processing

Automatic stop after measured values are nalized

Up to 10 nF Within accuracy specications

Above 10 nF

to 500 nF

Above 500 nF Not specied

Parallel capacitance is canceled from impedance and phase.

Calculated as:

(correction applied only when θ is negative)

(θ: Difference between the measurement current phase

and voltage signal phase; display reads “OVERFLOW”

when θ is 90°.)

Displayed as absolute value

Accuracy × 2.0

or less

*1: Automatically select the minimum display range that can meet both R

*2: 3-pole method only. *3: When using the 3-pole method, the minimum display value is 0.01

*4: Applied after zero adjustment, ±0.3 Ω is added before zero adjustment

*5: Does not apply when using the 2-pole method, in which case the

*6: It shall be the range in which the operation uncertainty within ±30% is

values.

and R

range) or 0.1 Ω (200 Ω range), with the following exceptions:

(20

• When R

• When RH = 100 Ω ±20 Ω and RS = 100 Ω ±20

• When RH = 500 Ω ±20 Ω and RS = 500 Ω ±20

(when using the L9841).

auxiliary earthing electrode’s allowable resistance is used as the upper limit value.

guaranteed; applied to 3-pole method.

= 0 Ω ±20 Ω and RS = 0 Ω ±20

Ω Ω

Input, Output, and Measurement Specications

HIOKI FT6031B961-00

*7: Applied in the range excluding 18°C to 28°C. *8: Function to check whether or not the peak of earth potential is within

the allowable range; no AC coupling; display the peak value (peak on +

side).

Input, Output, and Measurement Specications

HIOKI FT6031B961-00

Earth potential measurement

DC/AC autodetection range

Measurement method

Terminal for voltage measurement

Overload protection

Display refresh interval

Input resistance 4 M

Response time Within 2 s (when input voltage is changed from 0 V to

Effect of temperature

Range conguration

0.3 V DC ±0.2 V or higher is detected as DC

Manual switching function provided

Pulsating ow with superimposed AC component that periodically zero-crosses is detected as AC.

Average value rectication, RMS value indication

3-pole method:

Between S terminal (+) and E terminal (−)

2-pole method:

Between H terminal (+) and E terminal (−)

360 V AC (for 1 min., between each terminal)

360 V DC (for 1 min., between each terminal)

Within 1 s

or higher (DC / 50 Hz / 60 Hz)

30 V)

Accuracy × 1.0 ( −10°C to 50°C, applied in the range

Accuracy × 2.0 (−25°C to −10°C, 50°C to 65°C)

Display range 30 V rms

Maximum display value 30.0 V rms

Resolution 0.1 V

Accuracy

excluding 18°C to 28°C)

DC ±1.3% rdg ±4 dgt

50 Hz/60 Hz ±2.3% rdg ±8 dgt

Maintenance and Service

HIOKI FT6031B961-00

5.1 Repair, Inspection, and Cleaning

WARNING

Do not attempt to modify, disassemble, or try to

repair the instrument. Doing so may cause a re,

electric shock, or injury.

Calibrations

The calibration frequency varies depending on the status of the instrument or installation environment. We recommend that the calibration frequency is determined in accordance with the status of the instrument or installation environment and that you request that calibration be performed periodically.

Cleaning

IMPORTANT

Never use solvents such as benzene, alcohol, acetone, ether, ketones, thinners or gasoline, as they can deform and discolor the case.

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

• When rinsing with water, make sure that the battery cover has been attached. Make sure that the protector has been removed and rinse with room-temperature water. Washing with hot water may compromise the instrument’s waterproofness.

• After cleaning, thoroughly wipe off water of the instrument and protector. Completely dry them before putting the protector on.

Repair, Inspection, and Cleaning

HIOKI FT6031B961-00

• Do not put water while the battery cover has been taken off. It may cause failure due to water intrusion.

• When replacing the batteries after cleaning, the replacement should be carried out after the instrument has been completely dried.

• The instrument is waterproof to a water depth of 1 m for 30 min. Do not soak and wash the instrument. Do not soak the instrument into hot water.

• Do not wash the instrument with a washing machine

• Do not use any electronic appliance such as a dryer or microwave for drying the instrument.

• Wipe the LCD gently with a soft, dry cloth.

If the instrument is not to be used for an extended period of time

IMPORTANT

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

Disposal

Dispose of the instrument in accordance with local regulations.

Protector

A protector is available as a service part. Contact your authorized Hioki distributor or reseller.

Troubleshooting

HIOKI FT6031B961-00

5.2 Troubleshooting

If damage is suspected, read the “Before sending the instrument for repair” (p. 80) section before contacting your authorized Hioki distributor or reseller.

Be sure to follow these precautions when transporting the instrument:

• Remove batteries, accessories, and optional equipment from the instrument in order to avoid damage. Additionally, use the original packing materials, and be sure to double box the instrument. Accidental damage suffered in transit is not covered by the warranty.

• Attach a description of the issue when sending out your instrument for repair.

Troubleshooting

HIOKI FT6031B961-00

Before sending the instrument for repair

If it is not operating correctly, check the following items.

Symptom Cause, check, countermeasure

The power does not turn on. There are no batteries inside.

The instrument is

unintentionally turned off

during a measurement.

The batteries have been incorrectly installed.

→ Refer to how to install the batteries.

Have the batteries been depleted?

→ Replace the batteries with new ones

If the power still will not turn on, the instrument has a failure and needs to be

repaired.(“Inserting/Replacing Batteries”

[p. 26])

The batteries to be used may have been left for a long time.

→ Battery voltages may recover as time

proceeds, which seem to be high enough to work. However, such batteries, which provide only a little energy, cannot work. Replace the batteries with new ones.

The batteries have high internal resistance.

→ Such high-internal-resistance batteries,

which provide only a little energy even if they are new, cannot work. Use batteries produced by other manufactures.

Symptom Cause, check, countermeasure

HIOKI FT6031B961-00

The resistance of auxiliary earthing electrode does not come down (precision measurement).

appears and

measurement is not allowed (cannot measure the earth resistance due to high earth potential).

Troubleshooting

Bad connection of measurement cable, the ground is dry.

→ Make sure that the measurement cables

are connected to the earthing electrode/ auxiliary earthing rod.

→ Short-circuit the tips of the measurement

cables and then carry out the measurement. If the measured value is approx. 0 it is caused by a high earth resistance of the earthing electrode. Insert the auxiliary earthing rod deeper. Alternatively, pour water over the auxiliary earthing rod. If the resistance still will not come down, move the auxiliary earthing electrode to another location. The measurement cables (yellow) and (red) should be positioned approx. 10 cm away from each other.

The earth potential exceeds the value that can be accepted by the instrument. A large

leakage current may be owing into the

earthing electrode from equipment that has been connected to the earthing electrode. Or, the earth resistance of earthing electrode may be high and a large earth potential may have occurred by a small leakage current. → Remove the equipment that has been

connected to the earthing electrode and then carry out the measurement. (“When

NOISE appears” [p. 45])

Troubleshooting

HIOKI FT6031B961-00

Symptom Cause, check, countermeasure

Trying to carry out measurement on a newly built residential building, but

the simplied measurement

(2-pole method) is not allowed.

The measured value becomes approx. 0 measuring with use of an existing auxiliary earthing electrode for measurement.

Small noise occurs inside the instrument during measurement.

The measured value is high. It has been set to 2-pole method.

Measurement is not allowed when trying to measure with an earth net laid on asphalt.

Auxiliary earthing rod has been bent.

Measurement is not allowed if the electricity has not been distributed from the power company.

The earthing electrode and the auxiliary

when

electrode for measurement may have been connected through concrete.

→ Drive an auxiliary earthing rod into the

ground and then carry out measurement instead of using an auxiliary electrode for measurement.

It is the noise from the oscillator circuit inside the instrument. It is not a failure.

→ Press the 3P/2P button to select 3-pole

method.

Since asphalt is insulator, measurement is not possible with an earth net.

It is recommended to purchase the L9840

Auxiliary Earthing Rod. (Commercially available pegs have sharp tips, which may damage the carrying case.)

5.3 Error Display

HIOKI FT6031B961-00

Error Display

Error

display

Err 0ΩADJ

Err1

Err2

Err4

Err5

Err8

APS →P.oFF

bAtt

→P.oFF

Description Solution

Zero adjustment is outside the allowable range, zero adjustment has been executed while it is not on HOLD.

Abnormality in rmware

Adjustment data damaged

Setting data damaged

Abnormality in measurement circuit

Z3210 communications error (connection failure; Z3210 or

hardware failure)

Instrument powered off by

APS

Instrument powered off due to supply voltage drop

Execute zero adjustment again in accordance with the zero adjustment procedure. (

Instrument failure. Contact your authorized Hioki distributor or reseller to organize repair.

Take the following actions:

• Reinstall the Z3210.

• Install a different Z3210.

(p. 29)

If the error persists, you are experiencing a instrument failure. Contact your authorized Hioki distributor or reseller to organize repair.

Cycle the power.

p. 40, p. 54

)

Error Display

HIOKI FT6031B961-00

Appendix

HIOKI FT6031B961-00

6.1 Earth Resistance

The resistance between earthing electrode and ground is usually called earth resistance. To be exact, it is the sum of the resistance of earthing conductor, the contact resistance between earthing conductor and ground, and the resistance of ground. Earth resistance is different from commonly known resistors and has the following special characteristics.

• Polarizing action Since the ground has characteristics just like electrolyte, it

has the polarizing action, and if DC current ows through, an

electromotive force occurs in the opposite direction to the current, interfering with correct measurement. Therefore, rectangular wave or sine wave of several tens Hz to 1 kHz is usually used to measure the earth resistance.

• Special conguration Earth resistance is a resistance between earthing electrode and ground. It is not possible to take it out from the ground and measure it. Since the resistivity of ground is relatively high, a voltage drop occurs near the electrode through which the current to be

measured ows. Therefore, each electrode (E electrode, S(P) electrode, H(C) electrode) needs to be away from each other to

approx. 10 m to accurately measure the resistance of earthing electrode.

• Presence of disturbance factors There are disturbance factors such as effects from earth potential and auxiliary earthing electrode in the measurement of earth resistance. The earth potential caused by a leakage current from a device

Earth Resistance

HIOKI FT6031B961-00

that has been connected to the earthing electrode affects the measured value as it is superimposed over the signal to be detected by the earth tester. In addition, if the earth resistance of auxiliary earthing electrode is high, the measurement current is reduced, making it susceptible to noise such as earth potential. The instrument employs a system that is less susceptible to these disturbances and allows accurate measurement under adverse conditions.

Measurement Principle

HIOKI FT6031B961-00

6.2 Measurement Principle

While applying a voltage of AC power supply between H(C) electrode and E electrode, the owing AC current I is measured with an ammeter. In addition, the voltage V between S(P) electrode and E electrode that is caused by the ow of the current I is measured

by an AC voltmeter. The earth resistance RX of E electrode is derived from the measured current I and voltage V. It is not possible to accurately measure the

voltages between H(C) and E electrodes and between H(C) and S(P) electrodes.

AC Power

supply

S(P) electrode H(C) electrode

E electrode

V / I

Ammeter

Voltmeter

Measurement Principle

HIOKI FT6031B961-00

Hioki FT6031-50 kit User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Introduction

Verifying Package Contents

Options (sold separately)

Safety Notes

Usage Notes

Overview

1.1 Overview and Features

Overview

Features

1.2 Part Names and Functions

1.3 How to Use Carrying Case

Preparing for Measurement

Attaching/Removing Protector

2.2 Inserting/Replacing Batteries

Procedure

Connecting the Z3210 Wireless Adapter (Option)

Procedure

Making Measurements

3.1 Measurement Procedure

3.2 Inspecting Before Use

Setting Up Comparator (PASS/FAIL Test)

How to set up comparator

How to disable comparator

Performing zero adjustment

Connecting measurement cables

Measuring earth resistance

Stowing

Continuous measurement function

Performing zero adjustment

Connecting test leads

Measuring earth resistance

Stowing

3.6 Cautions and Tips for Measurement

Distance between earthing electrodes

Location to install auxiliary earthing rod

How to insert/pull out auxiliary earthing rod

Auto Power Save (Power-saving Function)

Wireless Communications Function (GENNECT Cross)

3.9 Activating the LCD All-on Display

3.10 Displaying the Serial Number

Maintenance and Service

5.1 Repair, Inspection, and Cleaning

5.2 Troubleshooting

5.3 Error Display

Appendix

6.1 Earth Resistance

6.2 Measurement Principle