Hioki FT6380 User manual

Instruction Manual
Manual de Instrucciones
FT6381
FT6380
CLAMP ON EARTH TESTER
MEDIDOR DE RESISTENCIA
DE TIERRA TIPO GANCHO
FT6380A983-01 (A981-03) 14-03H
March 2014 Revised edition 1

i
Contents
Introduction ..........................................................................1
Verifying Package Contents ................................................2
Safety Information ................................................................3
Operating Precautions .........................................................7
Chapter 1 Overview 11
1.1 Product Overview ..............................................11
1.2 Features ............................................................12
1.3 Names and Functions of Parts ..........................14
Operation key ....................................................16
Display Indicators.............................................. 17
Chapter 2 Measurement 19
2.1 Measurement process .......................................19
2.2 Preparing for Measurement ..............................20
Attaching the Strap............................................ 20
Installing (or Replacing) the Battery.................. 21
2.3 Pre-Operation Inspection ..................................23
Using the included resistance check loop to
inspect the instrument ....................................... 24
2.4 Measurement Procedure ...................................25
Resistance Measurement .................................26
Current Measurement .......................................29
2.5 Convenient function ..........................................33
Data hold function (Holding the measured value) 33
Backlight function
(Making measurements in a dark location)......... 33
Filter function (Rejecting noise) .........................34
Alarm function (Judging measured values and
sounding an alarm)............................................. 35
Memory function (Saving measurement data)...38

ii
Making measurements with an Android™
handset (FT6381 only)....................................... 42
Enabling the Bluetooth® function on the FT6381 43
Pairing the instrument with an Android™
handset (first use only)........................................ 44
Installing the FT6381 Communication Software
on the Android™ handset................................... 45
Registering the instrument you wish to connect
with the FT6381 Communication Software......... 46
Switching the FT6381 to connect with the
Android™ handset.............................................. 48
Using the FT6381 Communication Software
(second and subsequent use)............................. 48
2.6 Advanced Settings and Functions .....................51
Enabling/disabling the measurement range
display function................................................... 52
Enabling/disabling the auto-power-saving (APS)
function ............................................................... 53
Reverting the instrument to factory settings
(system reset)..................................................... 54
Chapter 3 Specifications 55
3.1 Measurement Specifications .............................55
3.2 General Specifications .......................................59
Chapter 4 Maintenance and Service 63
4.1 Cleaning ............................................................63
4.2 Troubleshooting .................................................64
Inspection and Repair........................................ 64
Before returning for repair .................................64
4.3 Error Display ......................................................65

Introduction
1
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.
• Bluetooth®is a registered trademark of Bluetooth SIG, Inc.
(USA).
• AndroidTM Google PlayTM is a registered trademark of Blue-
tooth®Google, Inc.
• Adobe and Reader are either registered trademarks or trade-
marks of Adobe Systems Incorporated in the United States and
/or other countries.
Introduction
Registered Trademarks

Verifying Package Contents
2
Package Contents
Use the original packing materials when transporting the instrument, if
possible.
For other transportation notes, refer to the "Transporting (p.64)".
Verifying Package Contents
When you receive the instrument, inspect it carefully to
ensure that no damage occurred during shipping. In particu-
lar, 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)

Safety Information
3
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 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 provided 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.
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.

Safety Information
4
The following symbols in this manual indicate the relative impor-
tance 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 perfor-
mance 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 regulations set out by the EC Directive.
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).
FCC ID Indicates the ID number of the wireless module
certified by the U.S. Federal Communications
Commission (FCC).

Safety Information
5
Screen displays that differ from the above notation:
IC Indicates the number of the wireless module
certified by Industry Canada.
Other Symbols
Indicates a prohibited action.
(p. #) Indicates the location of reference information.
[ ] Information displayed on the screen is enclosed
in brackets.
Fn
(bold
characters)
Bold text indicates alphanumeric characters
shown on operation keys.
The screen of this instrument displays characters in the fol-
lowing manner.
Over-range display
Open display
Resistance measurement: When the read-
ing 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.

Safety Information
6
This instrument complies with CAT IV safety requirements.
To ensure safe operation of measurement instruments IEC
61010 establishes safety standards for various electrical envi-
ronments, categorized as CAT II to CAT IV, and called measure-
ment categories.
Using a measurement instrument in an environment designated
with a higher-numbered category than that for which the instru-
ment 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.
Measurement categories
CAT II
Primary electrical circuits in equipment connected
to an AC electrical outlet by a power cord (portable
tools, household appliances, etc.)
CAT II covers directly measuring electrical outlet
receptacles.
CAT III
Primary electrical circuits of heavy equipment
(fixed installations) connected directly to the distri-
bution panel, and feeders from the distribution
panel to outlets.
CAT IV The circuit from the service drop to the service entrance, and to the power meter and primary
overcurrent protection device (distribution panel).

Operating Precautions
7
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
Before using the instrument for the first time, verify that it oper-
ates normally to ensure that no damage occurred during storage
or shipping. If you find any damage, contact your dealer or Hioki
representative.
Operating temperature:-10 to 50°C (14 to 122°F)
(Be sure to use batteries that are suited for use under the envi-
ronmental conditions in which you are using the instrument.)
Operating humidity: 80%RH or less (non condensating),
Operating Precautions
Preliminary Checks
Instrument Installation
Avoid the following locations that could cause an accident or
damage to the instrument.
Exposed to direct
sunlight
Exposed to high tem-
perature
In the presence of cor-
rosive or explosive
gases
Exposed to water, oil,
other chemicals, or
solvents Exposed to
high humidity or con-
densation
Exposed to strong
electromagnetic fields
Near electromagnetic
radiators
Exposed to high lev-
els of particulate dust
Near electromagnetic
radiators (e.g., high-
frequency induction
heating systems and
IH cooking utensils)
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
9
• 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 informa-
tion about the frequency derating characteristics during con-
tinuous 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 sub-
jecting them to mechanical shock, which could damage the
mating surfaces of the core and adversely affect measure-
ment.
• 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.
Frequency [Hz]
Current [A]

Operating Precautions
10
*IP40
This indicates the degree of protection provided by the enclo-
sure 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 enclo-
sure 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.
• 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.)

1.1 Product Overview
11
The FT6380 and FT6381 Clamp On Earth Tester make ground-
ing resistance measurements simply by being clamped to multi-
ple-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 function-
ality and can measure currents ranging from leakage current on
the order of several mA to load currents of up to 60 A.
The FT6381 emits radio radiation. Because use of devices that
emit radio radiation requires approval in the country of use, be
careful that use of the instrument in a country or region other
than those listed on the attached cautionary leaflet, "Precautions
Concerning Use of Equipment That Emits Radio Waves" or the
HIOKI products website may be subject to penalty as a violation
of law.
Overview Chapter 1
1.1 Product Overview

1.2 Features
12
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 ground 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 Ωwith its auto-range function. Current measurement
ranges from small leakage current (maximum resolution 10 μA) to a
maximum of 60 A.
Noise check function (p.28)
The instrument automatically detects noise that may affect ground-
ing 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.33)
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.33)
The instrument uses a white LED for excellent visibility so that dis-
play values can be read clearly, even in dark locations.
Auto-power-save (APS) function (p.53)
An auto-power-save function keeps batteries from running down
when you forget to turn off the instrument.

1.2 Features
13
Alarm function (p.35)
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 the
reading is greater than or less than the threshold).
Filter function (p.34)
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 per-
form two types of measurement: leakage current as related to deg-
radation of insulation, and leakage current including this harmonic
component.
Internal memory (p.38)
The instrument’s internal memory can record up to 2,000 measured
values.
Automatic measurement report function with
Android™connectivity (*FT6381 only) (p.42)
The FT6381 features Bluetooth®wireless technology and can be
connected to a smartphone running the Android operating 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
14
1.3 Names and Functions of Parts
Barrier
Front
Clamp sensor
FT6380 FT6381
POWERkey
HOLD key
(p.33)
A/Ωkey
Backlight key
(p.33)
Display Indicator
(p.17)
Operation key
(p.16)
POWER 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.
HOLD key • Holds the measured value display or cancels hold
mode.
• To cancel auto-power-save mode, press the POWER
key while holding down the HOLD key.
Backlight key • Turns the backlight on and off.
A/Ω key • Switches between resistance measurement mode and
current measurement mode.

1.3 Names and Functions of Parts
15
Battery cover
(p.21)
Back
Strap hole
(p.20)
Bottom
FT6380 FT6381
Serial No.

1.3 Names and Functions of Parts
16
Key Description
Switches to function mode, which is used to configure set-
tings. Pressing this key again will return to resistance mea-
surement mode or current measurement mode.
• Enables the alarm function. (p.35)
• 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 func-
tion mode. (p.37)
*In function mode, this key serves as the ▼key, which is
used to select setting items and values.
• Pressing this key while using the current measurement func-
tion enables the low-pass filter to reject unneeded harmonic
components. (p.34)
• Pressing it while using the resistance measurement function
enables the moving average function, allowing more stable
measurement. (p.34)
*In function mode, this key serves as the ▲key, which is
used to select setting items and values.
Saves measurement data to the instrument’s internal mem-
ory. (p.38)
*In function mode, this key serves as the OK key, which is
used to accept setting items and values.
Operation key