Hioki FT6380, FT6381 Instruction Manual
Instruction Manual
Manual de Instrucciones
FT6380
FT6381
CLAMP ON EARTH TESTER
MEDIDOR DE RESISTENCIA
DE TIERRA TIPO GANCHO
March 2014 Revised edition 1
FT6380A983-01 (A981-03) 14-03H
i
Contents
Introduction .......................................................................... 1
Verifying Package Contents ................................................2
Safety Information ................................................................3
Operating Precaution s ................ ............ .............................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 proces s ............................... ........19
2.2 Preparing for Measurement ..............................20
Attaching the Strap............................................ 20
Installing (or Replacing) the Battery.................. 21
2.3 Pre-Operation Ins p e ct i o n .......................... ........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 measurem ent data) ... 38
ii
Making meas urements 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 Setti ngs a nd Fun ctions .....................51
Enabling/disabling the measuremen t 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 Specif ic at io n s ................... ..........55
3.2 General Specifications .......................................59
Chapter 4 Maintenance and Service 63
4.1 Cleaning ............................................................63
4.2 Troubleshooting .................................................6 4
Inspection and Repair........................................ 64
Before returning for repair .................................64
4.3 Error Display ......................................................65
Introduction
1
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.
Verifying Package Contents
2
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 batteri es (2)
□ Strap (1)
Verifying Package Contents
Package Contents
Use the original packin g materials when transporting the in strument, if
possible.
For other transportation notes, refer to the "Transporting (p.64)".
Safety Information
3
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 safet y
features. Be certain that you understand the instructions
and precautions in the manual before use. We disclaim any
responsibility for accidents or injuri es not resul ting 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.
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 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 Japan ese techni cal standa rds set fo rth
by the Radio Act (type certification).
Indicates the ID number of the wireless module
certified by the U.S. Federal Communications
Commission (FCC).
Safety Information
5
Over-range display
Open display
Resistance measuremen t: Wh en the reading exceeds 1,600 Ω
Current measurem ent: When the reading
exceeds 60.0 A.
This screen is displayed when the clamp
sensor is not complete l y clo sed during use
of the resistance measurement function.
IC
Other Symbols
(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 number of the wireless module
certified by Industry Canada.
Indicates a prohibited action.
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 ac cident, 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
7
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)
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
Frequency [Hz]
Current [A]
• Do not input a cur rent 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 co mpletely
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.
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 emits radio radiation. Because use of devices that
emit radio radiation requires approval in the co untry 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.
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 grou nding resistance of u p to
0.02 to 1,600 Ω with its auto -range fu nction. Cur rent meas urement
ranges from small leakage current (maximum resolution 10 μA) to a
maximum of 60 A.
Noise check function (p.28)
The instrument automat ically detects no ise that may affe ct grounding resi stance measurement and display s 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 us er of the hold status by fl ashing w hile the
value is being held.
Backlight function (p.33)
The instrument uses a white LED for excellent visibility so th at display 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, yo u can ha ve the ins trumen t make a PASS/
FAIL judgment and notify you of the result with a buzzer. You can set
separate thresholds for resista nce 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 harm onic components are superimp osed on le akage
current waveforms. The instrument’s filter function allows it to perform two types of mea sureme nt: leaka ge cur rent a s rel ated to degradation of insulation , and leakage current i ncluding 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
The FT6381 featur es Bluetooth® wireless technology and can be
connected to a smartphone running the Android operating system to
easily create measurement reports in the field. (FT6381 ava ilability
is limited to certa in countries. For more informa tion, contact your
dealer or Hioki representative.)
™ connectivity (*FT6381 only) (p.42)
1.3 Names and Functions of Parts
14
Barrier
Front
Clamp sensor
FT6380 FT6381
POWER key
HOLD key
(p.33)
A/Ω key
Backlight key
(p.33)
Display Indicator
(p.17)
Operation key
(p.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
key while holding down the HOLD key.
• Turns the backlight on and off.
• Switches between resistan ce measure ment mode and
current measurement mode.
15
Battery cover
(p.21)
Back
Strap hole
(p.20)
Bottom
FT6380
FT6381
Serial No.
1.3 Names and Functions of Parts
1.3 Names and Functions of Parts
16
Operation key
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.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 se ttings can b e configur ed in function mode. (p.37)
*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 l ow-pass fi lte r to r ej ect un nee de d h arm on ic
components. (p.34)
• Pressing it while using the resistance measurement function
enables the moving averag e function, allowin g more stable
measurement. (p.34)
*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.38)
*In function mode, th is key serves as the
used to acc ept setting items an d values.
▼ key, which is
▲ key, which is
OK key, which is
17
Display Indicators
1.3 Names and Functions of Parts
Lights up when data is being held. (p.33)
Lights up in function mode. (p.50)
Flashes in subfunction mode. (p.51)
Lights up when the alarm function is on. (p.35)
Lights up when the filter function is on. (p.34)
Lights up when the Blue tooth
data is being sent or received. (model FT6381 only) (p.42)
Lights up when the auto-power-save function is on. (p.53)
Indicates the remaining battery power. (p.22)
Lights up in AC current measurement mode. (p.29)
Lights up in resistance measurement mode. (p.26)
Lights up in resistance measuremen t mode when a current
that could affect the measured value is detected. (p.28)
Lights up in resistance measuremen t mode when the mea-
sured ground loop has a high reactance component or capacitance component (
lights up due to a low mea sured resistance value, it is likely
that the displayed value indicates a shorted measurement
loop rather than normal grounding resistance. When the
] mark lights up, t he loop m ay have a break in it. In t his
[
case, the mark indicates th at the wire s ha ve b ee n co up led b y
capacitance.) (p.28)
Lights up during internal memory oper ati o ns. (p.3 8)
The number of measurem ent data poin ts stored in memo ry is
shown to the right.
±45° or greater). (When the [ ] mark
®
function is on. Flashes whe n
1.3 Names and Functions of Parts
18
Lights up when the range display function is on.
The measurement range is shown to the right.
19
Measurement Chapter 2
Measurement
Resistance Measurement (p.26 )
Current Measurem ent (p.29 )
End of measurement
Remove the instrument from the measurement target.
Turn off the instrument.
Measurement Preparations
Pre-Operation Inspection (p.23)
Using the included resistance check loop to inspect the
instrument (p.24)
3
2
1
2.1 Measurement process
2.1 Measurement process
2.2 Preparing for Measurement
20
2.2 Preparing for Measurement
After purchasing the instrument
Complete the following steps before using the instrument to
make measurements.
Attaching the Strap
Attach both ends of the Strap securely to the instrument.
If insecurely attached, the instrument may fall and be damaged
when carrying
Thread the strap through the strap hole as shown in the f ollowing diagram:
2.2 Preparing for Measuremen t
21
Installing (or Replacing) the Battery
Before using the instrument for the first time, install two AA-size
alkaline batteries (LR6). Verify that there is sufficient battery
power remaining before measurement. If there is insufficient battery power remaining, replace the batteries.
• To avoid electric shock when replacing the batteries, first
disconnect the clamp from the object to be measured.
• After replacing the batteries, replace the cover and
screws before using the instrument.
• Battery may explode if mistreated. Do not short- circuit,
recharge, disassemble or dispose of in fire.
• Handle and dispose of batteries in accordance with local
regulations
• Do not mix old and new batteries, or different types of bat teries. Also, be careful to observe bat tery polarity dur ing installation. Otherwise, poor performance or damage from battery
leakage could result.
• To avoid corrosion from battery leakage, remove the batteries
from the instrument if it is to be stored for a long time.
•
The indicator lights when battery voltage becomes
low. Replace the batteries as soon as possible.
• Before replacing the batteries, make sure that the
Slide Switch is OFF.
• After use, always turn OFF the power.
• If the battery is completely exhaus ted, the display will
show [BAttLo], and the instrument will automatically
turn off.
2.2 Preparing for Measurement
22
2
3
4
Required Items:
• Phillips screwdriver
• LR6 alkaline battery (2)
Normal procedure
Verify that the instrument is off.
1.
Remove the fastening screws of the battery cover,
2.
using a Phillips screwdriver.
Remove the battery cover.
3.
Insert two new batteries (LR06 alkaline batteries),
4.
taking care to orient them properly.
Replace the battery cover and tighten the fastening
5.
screws.
Battery Status Indicator
This indicator is displayed at the top right corner.?
When new alkaline batteries have been installed
When 2/3 of the battery power remains
When 1/3 of the battery power remains
No battery power remains. Replace with new batteries.
23
2.3 Pre-Operation Inspection
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.
Does the screen turn on when
the instrument is turned on?
The batteries may be dead.
Replace the batteries and try
again.
The instrument may be malfunctioning. Have the instrument repaired.
• Is the instrument damaged?
• Is the clamp sensor cracked
or otherwise damaged?
No
End of inspection
Yes
An error is
displayed.
• The screen is not on.
• The screen shows an
error.
Do not use the instrument if it
is damaged as doing so may
result in electric shock. Have
the instrument repaired.
Yes
1. Inspecting the instrument
2. Inspecting the instrument after turning it on
The screen is on.
Using the included resistance
check loop to inspect the instrument (p.24)
2.3 Pre-Operation Inspection
2.3 Pre-Operation Inspection
24
Resistance check loop
Using the included resistance check loop to
inspect the instrument
Before turning on the instrument, be sure to read Operating Precautions (p.7).
Inspecting the instrument with the resistance check loop
Verify that there is no foreign matter lodged between the tips of
the clamp sensor and that the sensor can be closed and opened
smoothly. If so, clamp the included resistance check loop and
verify that the instrument is operating properly. Verify that a
value within the allowable range is displayed for each loop.
Test resistance Allowable range
1 Ω 0.95 to 1.05 Ω
25 Ω 24.3 to 25.7 Ω
• If the instrument displays a value outside the allowable
range, it needs to be repaired. Contact your dealer or
Hioki representative.
• The resistance check loop cannot be us ed to calibrate
the instrument. T o have the instrument calibrated, contact your dealer.
25
barrier
2.4 Measurement Procedure
2.4 Measurement Procedure
• To avoid electric shock, do not touch the portion beyond the protective barrier during use.
• 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.
• The maximum allowable current is 100 A AC
continuous or 200 A AC for 2 minutes (50/60 Hz). Currents
in excess of these values must be avoided as they may
damage the instrument or cause bodily injury.
• The tips of the clamp sensor are prec isely manufactured in order to provide a high level of precision. Exercise caution when handling the clamp so as to avoid
subjecting it to excessive vibration, mechanical shock,
or force.
• If foreign matter gets stuck between the tips of the
clamp sensor, do not forcibly open or close the sensor,
but rather use a soft brush or similar implement to
carefully remove the foreign matter. Accurate measurements cannot be made while foreign matter is
stuck between the tips of the clamp sensor or while the
shape of the clamp sensor is deformed. If the tips of
the clamp sensor become deformed, have the instrument inspected and calibrated by your dealer.
2.4 Measurement Procedure
26
RmR
x
1
1
R
i
-----
i 1=
n
∑
------------------+=
R
x
1
1
R
i
-----
i 1=
n
∑
------------------»
R
x
R
1
R
n
R
2
Resistance Me asur e men t
Measuring Principle
As illustrated below, the instrument is designed to measure
grounding resistance at multiple grounding locations. (*For applications involving the measurement of grounding resistance at a
single grounding site, use Hioki’s 3151 EARTH HiTESTER.)
If the grounding resistance of the measurement target is represented by R
grounded locations are represented by R
and the grounding resistance values of other
x
, R2, …, Rn, the resis-
1
tance value measured by the product is as follows:
If n is sufficiently large and each Ri value is sufficiently small,
and the second term can be ignored, allowi ng the value of
to be measured.
R
x
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