Contens
Test Equipment Depot - 800.517.8431 - 99 Washington Street
Melrose, MA 02176 TestEquipmentDepot.com
Introduction .......................................................................... 1
Verifying Package Contents ................................................2
Safety Information ................................................................ 3
Operating Precautions .........................................................7
Chapter 1 Overview 11
1.1 Product Overview ..............................................11
1.2 Features ............................................................ 14
1.3 Names and Functions of Parts ..........................16
Operation key ....................................................18
Display Indicators ..............................................19
Chapter 2 Measurement 21
2.1 Measurement process ....................................... 21
2.2 Preparing for Measurement ..............................22
Attaching the Strap............................................. 22
Installing (or Replacing) the Battery ..................23
2.3 Pre-Operation Inspection .................................. 25
Using the included resistance check loop to
inspect the instrument .......................................26
2.4 Measurement Procedure ................................... 27
Resistance Measurement .................................28
Current Measurement ....................................... 31
2.5 Convenient function ..........................................35
Data hold function (Holding the measured value) 35
Backlight function
(Making measurements in a dark location) ....... 35
Filter function (Rejecting noise) ......................... 36
Alarm function (Judging measured values and
sounding an alarm) ...........................................37
Memory function (Saving measurement data) .. 40
ii
Making measurements with an Android™ handset
(FT6381 only) ....................................................44
Enabling the Bluetooth
Pairing the instrument with an Android™ handset
(first use only).................................................... 46
Installing the FT6381 Communication Software
on the Android™ handset ..................................47
Registering the instrument you wish to connect
with the FT6381 Communication Software ........48
Switching the FT6381 to connect with the
Android™ handset .............................................50
Using the FT6381 Communication Software
(second and subsequent use) ...........................50
2.6 Advanced Settings and Functions .....................53
Enabling/disabling the measurement range
display function ..................................................54
Enabling/disabling the auto-power-saving (APS)
function .............................................................. 55
Reverting the instrument to factory settings
(system reset).....................................................56
Chapter 3 Specifications 57
3.1 Measurement Specifications .............................57
3.2 General Specifications .......................................61
Chapter 4 Maintenance and Service 65
®
function on the FT6381 45
4.1 Cleaning ............................................................65
4.2 Troubleshooting ................................................. 66
Inspection and Repair ........................................66
Before returning for repair .................................66
4.3 Error Display ......................................................67
Introduction
Introduction
Thank you for purchasing the HIOKI Model FT6380, FT6381
CLAMP ON EARTH TESTER. To obtain maximum performance
from the instrument, please read this manual first, and keep it
handy for future reference.
Registered Trademarks
• Bluetooth
(USA).
• Android
tooth
• Adobe and Reader are either registered trademarks or trademarks of Adobe Systems Incorporated in the United States and
/or other countries.
®
is a registered trademark of Bluetooth SIG, Inc.
TM
Google PlayTM is a registered trademark of Blue-
®
Google, Inc.
1
Verifying Package Contents
When you receive the instrument, inspect it carefully to
ensure that no damage occurred during shipping. In particular, check the accessories, panel switches, and connectors. If
damage is evident, or if it fails to operate according to the
specifications, contact your dealer or Hioki representative.
Confirm that these contents are provided.
□
FT6380 or FT6381 Clamp On Earth Tester (1)
□ Instruction Manual (1)
□ Carrying Case (1)
□ Resistance Check Loop (1)
□ LR6 alkaline batteries (2)
□ Strap (1)
2
Verifying Package Contents
Package Contents
Use the original packing materials when transporting the instrument, if
possible.
For other transportation notes, refer to the "Transporting (p.66)".
Safety Information
Safety Information
This instrument is designed to comply with IEC 61010
Safety Standards, and has been thoroughly tested for
safety prior to shipment. However, mishandling during use
could result in injury or death, as well as damage to the
instrument. However, using the instrument in a way not
described in this manual may negate the provide d safety
features. Be certain that you understand the instructions
and precautions in the manual before use. We disclaim any
responsibility for accidents or injuries not resulting directly
from instrument defects.
This manual contains information and warnings essential for
safe operation of the instrument and for maintaining it in safe
operating condition. Before using it, be sure to carefully read the
following safety precautions.
Safety Symbols
In the manual, the symbol indicates particularly
important information that the user should read
before using the instrument.
The symbol printed on the instrument indicates
that the user should refer to a corresponding topic in
the manual (marked with the symbol) before
using the relevant function.
Indicates a double-insulated device.
Indicates AC (Alternating Current).
Indicates that the instrument may be connected to or
disconnected from a live circuit.
Indicates the power on/off button.
3
Safety Information
4
The following symbols in this manual indicate the relative importance of cautions and warnings.
Indicates that incorrect operation presents an
extreme hazard that could result in serious
injury or death to the user.
Indicates that incorrect operation presents a
significant hazard that could result in serious
injury or death to the user.
Indicates that incorrect operation presents a
possibility of injury to the user or damage to the
instrument.
Indicates advisory items related to performance or correct operation of the instrument.
Symbols for Various Standards
WEEE marking:
This symbol indicates that the electrical and
electronic appliance is put on the EU market
after August 13, 2005, and producers of the
Member States are required to display it on the
appliance under Article 11.2 of Directive 2002/
96/EC (WEEE).
This symbol indicates that the product conforms
to safety regulations set out by the EC Directive.
®
FCC ID
Indicates that the product incorporates Bluetooth
wireless technology. Bluetooth® is a registered
trademark of Bluetooth SIG, Inc., and is used
under license by HIOKI E.E. CORPORATION.
Indicates that the product conforms to the
domestic Japanese technical standards set forth
by the Radio Act (type certification).
Indicates the ID number of the wireless module
certified by the U.S. Federal Communications
Commission (FCC).
IC
Over-range display
Open display
Resistance measurement: When the reading exceeds 1,600 Ω
Current measurement: When the reading
exceeds 60.0 A.
This screen is displayed when the clamp
sensor is not completely closed during use
of the resistance measurement function.
Indicates the number of the wireless module
certified by Industry Canada.
Other Symbols
Indicates a prohibited action.
Safety Information
5
(p. #)
[ ] Information displayed on the screen is enclosed
Fn
(bold
characters)
The screen of this instrument displays characters in the following manner.
Screen displays that differ from the above notation:
Indicates the location of reference information.
in brackets.
Bold text indicates alphanumeric characters
shown on operation keys.
Safety Information
6
Measurement categories
This instrument complies with CAT IV safety requirements.
To ensure safe operation of measurement instruments IEC
61010 establishes safety standards for various electrical environments, categorized as CAT II to CAT IV, and called measurement categories.
Primary electrical circuits in equipment connected
CAT II
CAT III
CAT IV
Using a measurement instrument in an environment designated
with a higher-numbered category than that for which the instrument is rated could result in a severe accident, and must be
carefully avoided.
Use of a measurement instrument that is not CAT-rated in CAT II
to CAT IV measurement applications could result in a severe
accident, and must be carefully avoided.
to an AC electrical outlet by a power cord (portable
tools, household appliances, etc.)
CAT II covers directly measuring electrical outlet
receptacles.
Primary electrical circuits of heavy equipment
(fixed installations) connected directly to the distribution panel, and feeders from the distribution
panel to outlets.
The circuit from the service drop to the service
entrance, and to the power meter and primary
overcurrent protection device (distribution panel).
Operating Precautions
Operating Precautions
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
Preliminary Checks
Before using the instrument for the first time, verify that it operates normally to ensure that no damage occurred during storage
or shipping. If you find any damage, contact your dealer or Hioki
representative.
Instrument Installation
Operating temperature:-10 to 50°C (14 to 122°F)
(Be sure to use batteries that are suited for use under the environmental conditions in which you are using the instrument.)
Operating humidity: 80%RH or less (non condensating),
Avoid the following locations that could cause an accident or
damage to the instrument.
Exposed to direct
sunlight
Exposed to high temperature
Exposed to water, oil,
other chemicals, or
solvents Exposed to
high humidity or condensation
Exposed to high levels of particulate dust
In the presence of corrosive or explosive
gases
Exposed to strong
electromagnetic fields
Near electromagnetic
radiators
Near electromagnetic
radiators (e.g., highfrequency induction
heating systems and
IH cooking utensils)
7
Subject to vibration
Operating Precautions
8
Handling the Instrument
• To avoid short circuits and potentially life-threatening
hazards, never attach the clamp to a circuit that operates
at more than 600 V, or over bare conductors.
• The maximum rated voltage between input terminals and
ground is 600 VAC. Measuring a voltage in excess of this
rating relative to ground could damage the instrument
and result in bodily injury.
• To avoid electric shock, do not remove the instrument's
case. The internal components of the instrument carry
high voltages and may become very hot during operation.
• When the clamp sensor is opened, do not allow the metal
part of the clamp to touch any exposed metal, or to short
between two lines, and do not use over bare conductors.
To avoid electric shock when measuring live lines, wear
appropriate protective gear, such as insulated rubber
gloves, boots and a safety helmet.
Operating Precautions
Frequency [Hz]
Current [A]
• Do not input a current in excess of the maximum allowable
current. Doing so may damage the instrument or cause burns.
The maximum allowable current is 100 AAC continuous or
200 A AC within two minutes at 50/60 Hz. For more information about the frequency derating characteristics during continuous input, see the following diagram:
• To avoid damage to the instrument, protect it from physical
shock when transporting and handling. Be especially careful
to avoid physical shock from dropping.
• Be careful to avoid dropping the instrument or otherwise subjecting them to mechanical shock, which could damage the
mating surfaces of the core and adversely affect measurement.
• Although this instrument is dust resistant, it is not completely
dust- or waterproof. To prevent possible damage, avoid using
in dusty or wet environments.
• Do not slant the device or place it on top of an uneven surface.
Dropping or knocking down the device can cause injury or
damage to the device.
9
Operating Precautions
10
• The protection rating for the enclosure of this device (based
on EN60529) is *IP40. (The rating applies to the clamp sensor
when in the closed position.)
*IP40
This indicates the degree of protection provided by the enclosure of the device against use in hazardous locations, entry of
solid foreign objects, and the ingress of water.
4: Protected against access to hazardous parts with wire mea-
suring 1.0 mm in diameter. The equipment inside the enclosure is protected against entry by solid foreign objects larger
than 1.0 mm in diameter.
0: The equipment inside the enclosure is not protected against
the harmful effects of water.
1.1 Product Overview
11
Overview Chapter 1
1.1 Product Overview
The FT6380 and FT6381 Clamp On Earth Tester make grounding resistance measurements simply by being clamped to multiple-grounded ground wires. No auxiliary grounding rod is
needed, and there is no need to disconnect the ground wire from
the grounding rod.
The instruments also provide AC current measurement functionality and can measure currents ranging from leakage current on
the order of several mA to load currents of up to 60 A.
The FT6381 can only be used in Japan, the U.S., Canada, and
the EU. Because it incorporates Bluetooth
the instrument emits radio radiation. Use of devices that emit
radio radiation requires approval in the country of use, and use
of the instrument in a country or region other than those listed
above may be subject to penalty as a violation of law.
This device complies with part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause
undesired operation.
FCC CAUTION
Changes or modifications not expressly approved by the party
responsible for compliance could void the user's authority to
operate the equipment.
Note: This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to part 15 of the
®
wireless technology,
1.1 Product Overview
12
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with
the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does
cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of
the following measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
-Consult the dealer or an experienced radio/TV technician for
help.
This transmitter must not be co-located or operated in conjunction with any other antenna or transmitter.
This equipment complies with FCC radiation exposure limits set
forth for an uncontrolled environment and meets the FCC radio
frequency (RF) Exposure Guidelines in Supplement C to
OET65. This equipment has very low levels of RF energy that it
deemed to comply without maximum permissive exposure evaluation (MPE). But it is desirable that it should be installed and
operated keeping the radiator at least 20cm or more away from
person's body (excluding extremities: hands, wrists, feet and
ankles).
This Class B digital apparatus complies with Canadian ICES-
003.
1.1 Product Overview
This device complies with Industry Canada licence-exempt RSS
standard(s). Operation is subject to the following two conditions:
(1) this device may not cause interference, and (2) this device
must accept any interference, including interference that may
cause undesired operation of the device.
This equipment complies with IC radiation exposure limits set
forth for an uncontrolled environment and meets RSS-102 of the
IC radio frequency (RF) Exposure rules. This equipment has
very low levels of RF energy that it deemed to comply without
maximum permissive exposure evaluation (MPE). But it is desirable that it should be installed and operated keeping the radiator
at least 20cm or more away from person's body (excluding
extremities: hands, wrists, feet and ankles).
13
1.2 Features
14
1.2 Features
Compact, low-profile sensor
The compact, low-profile sensor can be used to clamp ground wires
with ease. The sensor design dramatically speeds the measurement
process by eliminating the need to pull out g round wires for clamping
or dig around the ground rod or wire.
Broad dynamic range
The instrument can easily measure grounding resistance of up to
0.02 to 1,600 Ω with its auto-range function. Current measurement
ranges from small leakage current (maximum resolution 10 A) to a
maximum of 60 A.
Noise check function (p.30)
The instrument automatically detects noise that may affect grounding resistance measurement and displays a mark.
True RMS display
True RMS calculation allows the instrument to accurately measure
distortion waveform currents.
Data hold function (p.35)
A large button that is easy to push lets you hold the measured value.
The button notifies the user of the hold status by flashing while the
value is being held.
Backlight function (p.35)
The instrument uses a white LED for excellent visibility so that display values can be read clearly, even in dark locations.
Auto-power-save (APS) function (p.55)
An auto-power-save function keeps batteries from running down
when you forget to turn off the instrument.
1.2 Features
15
Alarm function (p.37)
By setting a threshold, you can have the instrument make a PASS/
FAIL judgment and notify you of the result with a buzzer. You can set
separate thresholds for resistance and current measurements and
select judgment criteria (whether to generate a FAIL result when t he
reading is greater than or less than the threshold).
Filter function (p.36)
Widespread use of switching power supplies and inverters has led to
cases where harmonic components are superimposed on leakage
current waveforms. The instrument’s filter function allows it to perform two types of measurement: leakage current as related to degradation of insulation, and leakage current including this harmonic
component.
Internal memory (p.40)
The instrument’s internal memory can record up to 2,000 measured
values.
Automatic measurement report function with
Android
™ connectivity (*FT6381 only) (p.44)
The FT6381 features Bluetooth® wireless technology and can be
connected to a smartphone running the Android o perating system to
easily create measurement reports in the field. (FT6381 availability
is limited to certain countries. For more information, contact your
dealer or Hioki representative.)
1.3 Names and Functions of Parts
Barrier
Front
Clamp sensor
FT6380 FT6381
POWER key
HOLD key
(p.35)
A/Ω key
Backlight key
(p.35)
Display Indicator
(p.19)
Operation key
(p.18)
16
1.3 Names and Functions of Parts
POWER key
HOLD key
Backlight key
A/Ω key
• Used to turn the instrument on and off.
• To temporarily cancel the auto-power-save function,
press the POWER key while holding down the HOLD
key.
• Holds the measured value display or cancels hold
mode.
• To cancel auto-power-save mode, press the POWER
• Turns the backlight on and off.
• Switches between resistance measurement mode and
key while holding down the HOLD key.
current measurement mode.
Battery cover
(p.23)
Back
Strap hole
(p.22)
Bottom
FT6380
FT6381
Serial No.
1.3 Names and Functions of Parts
17
1.3 Names and Functions of Parts
Operation key
18
Key Description
Switches to function mode, which is used to configure settings. Pressing this key again will return to resistance measurement mode or current measurement mode.
• Enables the alarm function. (p.37)
• When the alarm function is enabled, the instrument will
notify the user with the buzzer if a reading is greater than (or
less than) a preset threshold.
• Alarm function threshold settings can be configured in function mode. (p.39)
*In function mode, this key serves as the
used to select setting items and values.
• Pressing this key while using the current measurement function enables the low-pass filter to reject unneeded harmonic
components. (p.36)
• Pressing it while using the resistance measurement function
enables the moving average function, allowing more stable
measurement. (p.36)
*In function mode, this key serves as the
used to select setting items and values.
Saves measurement data to the instrument’s internal memory. (p.40)
*In function mode, this key serves as the
used to accept setting items and values.
▼ key, which is
▲ key, which is
OK key, which is
Display Indicators
1.3 Names and Functions of Parts
Lights up when data is being held. (p.35)
Lights up in function mode. (p.52)
Flashes in subfunction mode. (p.53)
Lights up when the alarm function is on. (p.37)
Lights up when the filter function is on. (p.36)
Lights up when the Bluetooth
data is being sent or received. (model FT6381 only) (p.44)
Lights up when the auto-power-save function is on. (p.55)
Indicates the remaining battery power. (p.24)
Lights up in AC current measurement mode. (p.31)
Lights up in resistance measurement mode. (p.28)
Lights up in resistance measurement mode when a current
that could affect the measured value is detected. (p.30)
Lights up in resistance measurement mode when the mea-
sured ground loop has a high reactance component or capacitance component (
lights up due to a low measured resistance value, it is likely
that the displayed value indicates a shorted measurement
loop rather than normal grounding resistance. When the
] mark lights up, the loop may have a break in it. In this
[
case, the mark indicates that the wires have been coupled by
capacitance.) (p.30)
Lights up during internal memory operations. (p.40)
The number of measurement data points stored in memory is
shown to the right.
±45° or greater). (When the [ ] mark
®
function is on. Flashes when
19
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