Hioki FT6031 Instruction Manual
FT6031
EARTH TESTER
Instruction Manual
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Oct. 2018 Revised edition 2
FT6031A981-02 18-10H
EN
Contents
Introduction .........................................................................1
Verifying Package Contents ..............................................1
Options (sold separately) ..................................................2
Safety Notes ........................................................................ 3
Usage Notes ........................................................................ 8
1 Overview 13
1.1 Overview and Features ................................. 13
Overview ................................................................... 13
Features .................................................................... 13
1.2 Parts Names and Functions ......................... 15
1.3 How to Use Carrying Case ...........................20
2 How to Measure 21
2.1 MeasurementWorkow ................................ 21
2.2 Attaching/Removing Protector ....................24
2.3 Inserting/Replacing Batteries ......................25
2.4 Inspection before Use ................................... 29
2.5 Setting Up Comparator (PASS/FAIL Test) ...31
How to set up comparator ......................................... 32
How to disable comparator ....................................... 32
2.6 Precise Measurement for Earth
Resistance(Precise Measurement
Method, Three-pole Method) ........................ 33
Performing zero adjustment ...................................... 35
Connecting measurement cables .............................36
Measuring earth resistance ......................................39
Stowing ..................................................................... 42
FT6031A981-02
i
2.7 SimpliedMeasurementforEarth
Resistance(SimpliedMeasurement
Method, Two-pole Method) ........................... 44
Performing zero adjustment ...................................... 46
Connecting test leads ...............................................48
Measuring earth resistance ......................................51
Stowing ..................................................................... 51
2.8 Cautions and Tips for Measurement ...........52
Distance between earthing electrodes ......................52
Location to install auxiliary earthing rod ....................53
How to insert / pull out auxiliary earthing rod ............ 54
2.9 Auto Power Save
(Power-saving Function) ..............................56
2.10 Activating the LCD All-on Display ...............56
2.11 Displaying the Serial number .......................57
3 Specication 59
3.1 GeneralSpecication ...................................59
3.2 Measurement Function/Performance .......... 61
4 Maintenance and Service 67
4.1 Repair, Inspection, and Cleaning .................67
4.2 Troubleshooting ............................................69
4.3 Error Display .................................................. 73
Appendix Appx. 1
Appendix 1 Earth Resistance ...................Appx. 1
Appendix 2 Measurement Principle ......... Appx. 3
ii
Introduction
Introduction
Thank you for purchasing the HIOKI FT6031 Earth Tester. To obtain
maximum performance from the product, please read this manual
rst, and keep it handy for future reference.
Verifying Package Contents
When you receive the instrument, inspect it carefully to ensure
that no damage occurred during shipping. In particular, check the
accessories, panel switches, and connectors. If damage is evident,
or if it fails to operate according to the specications, contact your
authorized Hioki distributor or reseller.
Check the package contents as follows.
FT6031
L9840
L9841 Measurement Cable
L9842-11 Measurement Cable
L9842-22 Measurement Cable
C0106 Carrying Case ×1
Protector
LR6 Alkaline battery × 4
Instruction manual
Accessory
Auxiliary Earthing Rod (2 piece set) ×1
(alligator clip, black 4 m) ×1
(yellow 10 m, equipped with winder) ×1
(red 20 m, equipped with winder) ×1
1
Options (sold separately)
Options (sold separately)
The following options are available for the instrument. Contact your
authorized Hioki distributor or reseller when ordering.
L9787 Test Lead
L9840 Auxiliary Earthing Rod
L9841 Measurement Cable
L9842-11 Measurement Cable
(for simplied 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 Measurement Cable
L9843-52 Measurement Cable
L9844 Measurement Cable
9050 Earth Nets
C0106 Carrying Case
(for precision measurement method,
red 20 m, equipped with winder)
(for precision measurement method,
yellow 50 m, equipped with at cable winder)
(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)
2
Safety Notes
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.
Before using the instrument, be certain to carefully read the following
safety notes.
DANGER
Mishandling during use could result in injury or death,
as well as damage to the instrument. Be certain that
you understand the instructions and precautions in
the manual before use.
WARNING
With regard to the electricity supply, there are risks
of electric shock, heat generation, re, and arc
discharge due to short circuits. If persons unfamiliar
with electricity measuring instruments are to use
the instrument, another person familiar with such
instruments must supervise operations.
3
Safety Notes
Notation
In this manual, the risk seriousness and the hazard levels are classied as
follows.
Indicates an imminently hazardous situation
DANGER
WARNING
CAUTION
IMPORTANT
that will result in death or serious injury to the
operator.
Indicates a potentially hazardous situation
that may result in death 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 related to the operation
of the instrument or maintenance tasks with
which the operators must be fully familiar.
Indicates a high voltage hazard.
If a particular safety check is not performed or
the instrument is mishandled, this may give
rise to a hazardous situation; the operator
may receive an electric shock, may get burnt
or may even be fatally injured.
Indicates prohibited actions.
Indicates the action which must be performed.
*
Additional information is presented below.
4
Symbols afxed to the instrument
Indicates cautions and hazards. When the symbol is printed on
the instrument, refer to a corresponding topic in the Instruction
Manual.
Indicates a double-insulated device.
Indicates DC (Direct Current).
Indicates AC (Alternating Current).
Indicates the power switch mark.
Symbols for various standards
Indicates the Waste Electrical and Electronic Equipment
Directive (WEEE Directive) in EU member states.
Indicates that the instrument conforms to safety regulations set
out by the EC Directive.
Safety Notes
5
Safety Notes
Screen display
This instrument uses the following screen displays.
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
We dene measurement tolerances in terms of f.s. (full scale), rdg.
(reading) and dgt. (digit) values, with the following meanings:
(Maximum display value)
f.s.
The maximum displayable value.
(Reading or displayed value)
rdg.
The value currently being measured and indicated on the
measuring instrument.
(Resolution)
The smallest displayable unit on a digital measuring
dgt.
instrument, i.e., the input value that causes the digital display
to show a “1” as the least-signicant digit.
6
Safety Notes
Measurement categories
To ensure safe operation of measuring instruments, IEC 61010
establishes safety standards for various electrical environments,
categorized as CAT II to CAT IV, and called measurement categories.
DANGER
• Using a measuring instrument in an environment
designated with a higher-numbered category than
that for which the instrument is rated could result in
a severe accident, and must be carefully avoided.
• Using a measuring instrument without categories in
an environment designated with the CAT II to CAT
IV category could result in a severe accident, and
must be carefully avoided.
This instrument conforms to the safety requirements for CAT II 300 V, CAT III
150 V, CAT IV 100 V measuring instruments.
CAT II: When directly measuring the electrical outlet receptacles of
CAT III: When measuring the primary electrical circuits of heavy equipment
CAT IV: When measuring the circuit from the service drop to the service
the primary electrical circuits in equipment connected to an
AC electrical outlet by a power cord (portable tools, household
appliances, etc.).
(xed installations) connected directly to the distribution panel,
and feeders from the distribution panel to outlets.
entrance, and to the power meter and primary overcurrent
protection device (distribution panel).
Distribution Panel
Service Entrance
Service Drop
CAT IV
Power Meter
Internal Wiring
CAT III
Fixed Installation
CAT II
Outlet
7
Usage Notes
Usage Notes
Follow these precautions to ensure safe operation and to obtain the
full benets of the various functions.
Verifying before usage
Before using the instrument, verify that it operates normally to
ensure that no damage occurred during storage or shipping. If
you nd any damage, contact your authorized Hioki distributor or
reseller.
DANGER
Before using the instrument, check that the coating
of the test leads and cables are neither ripped nor
torn and that no metal parts are exposed. Using the
instrument under such conditions could result in
electric shock. Replace the test leads and cables with
those specied by our company.
IMPORTANT
Use only the specied test leads and cables. Using a nonspecied cable may result in incorrect measurements due to poor
connection or other reasons.
8
Usage Notes
Use environment of the device
The protection rating for the enclosure of this device (based on
EN60529) is *IP65/67.
CAUTION
Although this device 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.
*IP65/67:
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.)
9
Usage Notes
For details on the operating temperature and humidity, see the
specications. (p. 59)
CAUTION
• Installing the instrument in inappropriate locations may
cause a malfunction of instrument or may give rise to an
accident. Avoid the following locations.
• Exposed to corrosive or combustible gases
• Exposed to water, oil, chemicals, or solvents
• Exposed to high humidity or condensation
• Exposed to a strong electromagnetic eld or electrostatic
charge
• Near induction heating systems (such as high-
frequency induction heating systems and IH cooking
equipment)
• Susceptible to vibration
• Do not store or use the instrument where it could be
exposed to direct sunlight or high temperature.
• To avoid damage to the instrument, protect it from
physical shock when transporting and handling. Be
especially careful to avoid physical shock from dropping.
• Do not place the device on an unstable table or an
inclined place. Dropping or knocking down the device
can cause injury or damage to the device.
10
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.
• Use only the specied auxiliary earthing rod, cables,
and test leads. Using a non-specied 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.7).
Precautions during shipment
CAUTION
• When transporting the instrument, use the original
packing materials in which it was shipped, and pack in a
double carton. Damage occurring during transportation
is not covered by warranty.
• To avoid damage to the instrument, remove the
accessories and optional equipment from the instrument
before shipment.
Usage Notes
11
Usage Notes
12
Overview
1
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.
This 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 (three-pole method)
and simplied measurement (two-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
rdg. ±4 dgt.
The measurement is performed by simply
pressing 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 ±1.5%
Ω
13
Overview and Features
Dust-proof,
jet-proof and water-
proof
Supplied with a
winder
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 a useful
winder 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.
14
Parts Names and Functions
1.2 Parts Names and Functions
Front
Protector
Removed when
replacing the batteries.
(p. 24, p. 68)
Operation
buttons
(p. 17)
Please do not press the buttons of the device with a sharp object. It may
damage the device.
Measurement terminals
E Connected with the black cable.
S(P) Connected with the yellow cable.
H(C) Connected with the red cable.
Display
(p. 18)
15
Parts Names and Functions
Rear and Sides
Battery cover (side view)
Operation Buttons
Waterproof seal
It needs to be replaced when
degraded.
Please contact your authorized
Hioki distributor.
Battery cover
Removed when replacing the
batteries. (p. 25)
Serial number label
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)
16
1
2
3
5
6
7
4
Parts Names and Functions
1
2
3
4
5
6
7
Start/stop for measuring earth resistance
• Displays the resistance of each earthing electrode.
(p. 39)
• Display switching (three-pole method, two-pole method)
• DC/AC switching (when measuring earth potential)
• Function switching (three-pole method, two-pole method)
• Unlocks the retained value and displays the current earth
potential value.
Power ON/OFF
Live wire warning LED
• For three-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 two-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.
Sets/cancels comparator setting (COMP lights up/goes off).
(p. 31)
Sets/cancels zero adjustment setting. (p. 35, p. 46)
17
Parts Names and Functions
Display
8
1
7
9
2
6
3
4
5
18
Parts Names and Functions
Comparator
1
2
3
4
5
6
comparison result
(PASS)
Comparator
comparison result
(FAIL)
Lights up when DC/
AC auto-detect
setting is enabled
for measuring earth
potential.
Three-pole method
(p. 33)
Two-pole method
(p. 44)
Zero adjustment
(p. 35, p. 46)
Displays when
COMP
comparator setting
is enabled. (p. 31)
Retention of the
measured value
Displays when earth
potential exceeds
allowable range.
7
8
9
See p. 73 for error display.
Displays the battery
level. (p. 27)
Displayed 30 sec. before
APS
auto-power-save function
is activated. (p. 56)
Indicates the terminal
to be connected with
measurement cable or
test lead.
Turns on 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)
19
How to Use Carrying Case
1.3 How to Use Carrying Case
Please store the device, 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
20
Earth Tester
Please make sure to retract the
winder knob before storing it in the
carrying case.
Measurement
Cable (Black)
Instruction Manual
How to Measure
2
2.1 Measurement Workow
Before using the instrument, be sure to read “Usage Notes” (p.8).
Preparation
Insert the batteries. (p.25)
As necessary, have other
Perform the startup check. (p.29)
Measurement
Turn the power on and select the
measurement method.
optional items available and
ready.
Connect measurement cables or
leads to the measurement terminals.
Perform zero adjustment.
(three-pole method (p.35),
two-pole method (p.46))
Start the measurement.
test
End of the measurement
Turn the power off and remove measurement cables or test leads
from the measuring object.
21
Measurement Workow
• This product should only be connected to the
secondary side of a breaker, so the breaker can
prevent an accident if a short circuit occurs.
Connections should never be made to the primary
side of a breaker, because unrestricted current ow
could cause a serious accident if a short circuit
occurs.
• Connect the test lead to the instrument rst, and
then to the active lines to be measured. To avoid
electric shock and short circuits, do not shortcircuit two wires to be measured by bringing the
metal part of the test lead's clip into contact with
them. Never touch the metal end of the clip.
To avoid 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 cables and test
leads.
• Conrm that all connections of cables and test
leads are secure to the measurement terminals. The
increased resistance of loose connections can lead
to overheating and re.
DANGER
WARNING
22
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