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

2.4 Measurement Procedure

27

R

x

R

1

R

n

R

x

Example with actual measured values

The following provides an example with actual measured values.
The more grounding electrodes there are in the multiple­grounded installation, the higher the accuracy of the obtained
values. Alternately, if even one grounding electrode has a small
value (for example, 1 Ω), accurate values can be approached
even if there are few grounding electrodes. Since m ost m ultiple­grounded systems have a large number of grounding elec­trodes, the error can be limited.

Measuring method

Select resistance measurement mode.

1.

Select resistance measurement mode with the A/Ω key.

Clamp the grounding wire you wish to measure.

2.

The resistance value will be displayed.

2.4 Measurement Procedure

28

• Do not measure the sam e location with two or more
Clamp On Earth Testers at the same time. The instru­ments will interfere with each other, preventing accu­rate measurement.

• Verify that the mark is not lit up.

When the current flowing through the grounding wire is high
(approximately 2.5 A or great er w ith a commercial frequency
of 50/60 Hz, approximately 100 mA or greater with a har­monic component of 1 kHz), the current will affect measured
values, making it impossible to measure the resistance.
Check the current flowing through the grounding w ire.

*The current level a t which the mark lit u p depe nds on

individual differences as we ll as the frequen cy. The closer to
the injected signal frequency, the smaller the noise current
that will affect operation.

• Open display

The screen will show [OPEn] if the clamp is not com­pletely closed. Close the clamp completely and repeat
the measurement.

*If an extremely lar ge curren t is flowi ng throug h the groundi ng

wire or a DC current is superposed, the screen may display

[OPEn] even if the clamp is completely closed. This does not

signal a malfunction. Che ck the current flowing through the
grounding wire by using the instrument's current measure­ment mode or an instrument such as a clamp tester capable
of DC current measurement.

• Inductor mark

If the [ ] mark next to the resistance mark light up
during measurement, there may be a short in the
ground wire. It is recommended to verify that there are
no shorts in the location being measured.

• Capacitance mark

[]

If the

mark next to the resistance mark light up
during measurement, there may be a break in the
ground wire. It is recommended to verify that there are
no wiring breaks in the location being measured.

Short Break

[]

[]

R

x

R

R

1

x

R

x

R

R

1

x

2.4 Measurement Procedure

29

Current Measurement

Select current measurement mode with the A/Ω key.

1.

Position the conductor in the center of the clamp

2.

sensor.

The current RMS value will be shown on the display .

3.

2.4 Measurement Procedure

30

OK NG

• The frequency of special waveforms such as at the
secondary side of an inverter may not be indicated cor­rectly.

• Depending on the magnitude and frequency of the
input current, resonances may be heard from the
clamp jaw. This does not affect the measurement.

• Do not input a current in excess of the maximum allow­able current for the current range being used.

31

Measuring zero-phase current

Single-phase, 2-lead circuits

three-phase 3-lead circuits

clamp all three leads of the
circuit

Load
device

Load
device

lg

When measuring zero-phase current, clamp all of the circuits at
once.

2.4 Measurement Procedure

2.4 Measurement Procedure

32

Do not input current that exceeds the maximum continu­ous input of the electric current range.

• Measurement may not be accurate in the cases below.
(1) When there is large current (of about 100 A) flo w-

ing through a nearby electric line

(2) Note that a value of several tens of amperes may

be displayed when opening or closing the clamp
sensor, or when changing the electric current
range. This is not an error. It may take some time
for the display to return to zero. However, starting
measurement before the display returns to zero will
not affect measurement.

• Enable the "Filter function (Rejecting noise) (p.34)"
when conducting measurement in the cases below.
(1) When meaningless data is displayed due to noise.
(2) When using the instrument to measure special

waveforms, such as those on the secondary side of
an inverter

The instrument may not be able to pe rform measure-

ment in the cases below.

(1) When using input current that is 1/10 or less of the

full electric current range

(2) When measuring high frequencies with the filter

function enabled.

2.5 Convenient function

33

2.5 Convenient function

Data hold function (Holding the measured value)

This function holds the measured value and continues to display
that value.
Press the HOLD key. The instrument will beep twice and the
[ ] mark will be displayed, an d the measured value will be
held. The HOLD key will flash. To cancel hold mode, press the

HOLD key again. The instrument will beep once and the [ ]

mark will disappear, and the HOLD key will stop flashing.

Backlight function
(Making measurements in a dark location)

This function makes the display easier to see in dark locations.
Press the BACKLIGHT key ( ). The backlight will turn on.
The backlight will turn off automatically when there has been no
operation for about 2 minutes.
To turn off the backlight, press the BACKLIGHT key ( ) again.
The backlight will turn off.

2.5 Convenient function

34

Filter function (Rejecting noise)

This function allows you to reject unneeded frequency compo­nents such as high-frequency noise.
Press the FILTER key. The [ ] mark will be displayed. To
cancel the filter, press the FILTER key again. The [ ] mark
will disappear.

During resistance measurement

Using the filter function when there is a significant amount
of variation in measured values during resistance measure­ment will cause the measured values to stabilize.

*Note that noise rejection cannot be used when the [

mark is lit up.

During current measurement

Using the filter function enables a low-pass filter, causing
the harmonic component to be eliminated from measured
values. Widespread use of switching power supplies and
inverters has led to cases where harmonic components are
superimposed on current waveforms; the filter funct ion is
effective in such cases. Canceling the filter function dis­ables the low-pass filter, allowing measurement of current
including harmonic components.

]

2.5 Convenient function

35

Alarm Settings screen for resistance measurement

Alarm Settings screen for current measurement

Alarm function
(Judging measured values and s ound ing an alarm )

You can sound an alarm (A h igh tone signifies a high alarm,
while a low tone signifies a low alarm.) using previously set
thresholds by pressing the key.
Thresholds and other settings must be configured in advance.
To cancel the alarm function, press the key again.

Configuring the alarm settings

1.

Press the Fn key to switch to function mode. Using the ▼
and ▲ keys, select the resistance or current Alarm Settings
screen and press the OK key.

*For more information about function mode, see (p.50).

2.5 Convenient function

36

Lo: The alarm will sound if the measured value

is less than the set threshold value.

Hi: The alarm will sound if the measured value

is greater than the set threshold value.

*The Hi/Lo setting is save d once the following setting has been

configured. If you press the

Fn key after configuring the Hi/Lo set-

ting but before saving the threshold and thereby cancel the config­uration process, any changes to the Hi/Lo setting will not be
saved.

Set the alarm type (Hi/Lo).

2.

Using the ▼ and ▲ keys, select the alarm type (Hi/Lo), and
press the OK key. The next threshold setting will st art flas h­ing.

2.5 Convenient function

37

Set the threshold.

3.

After configuring the Hi/Lo setting, set the threshold.
Using the ▼ and ▲ keys, set the threshold and press the

OK key.

You can move more quickly through threshold values by
pressing and holding the ▼ and ▲ keys.

Once the settings are complete, the screen will switch to
the Alarm Settings screen. To return to resistance mea­surement or current measurement mode, press the Fn key
again or the A/Ω key.

2.5 Convenient function

38

Memory number

When the number of values saved in the instrument ’s memory
reaches 2,000, the display will show “FULL,” and you will not
be able to save additional values. Delete unneeded values to
free up space.

Memory function (Saving measurement data)

Press the MEM key in either resistance measurement mode or
current measurement mode. The instrument will beep three
times and the displayed measured value will be stored along
with the memory number (1 to 2,000) in the instrument’s internal
memory.

* Measured values, filter use, and the [ ] and [ ]

marks are saved in memory.

2.5 Convenient function

39

Loading a value from the instrument’s internal memory

Press the Fn key to enter function mode.

1.

Using the ▼ and ▲ keys, select the Read Memory
screen and press the OK key.

*For more information about func tion mode, see (p.50).

Using the ▼ and ▲ keys, increment or decrement the

2.

memory number to recall the measured value for the
memory number you wish to load.
You can move more quickly through memory numbers
by pressing and holding the ▼ and ▲ keys.

To exit the Read Memory screen, press the Fn key or
the OK key.
* To return to resistance measurement or current mea-

surement mode, press the Fn key again or the A/Ω
key.

2.5 Convenient function

40

To clear the last stored data po int
(1 value)
(The screenshot to the left indicates
that 34 values hav e been sa ved in
the instrument’s memory.)

To clear all data points
(The screen will show [ALL].)

Clearing stored data

You can clear the last stored data point (1 value) or all
stored data points.

Press the Fn key to enter function mode.

1.

Using the ▼ and ▲ keys, select the Clear Memory
screen and press the OK key. The screen will show
[CLr].

*For more information about funct ion mode, see (p.50).

Using the ▼ and ▲ keys, select either the last stored

2.

data point or all data points and press the OK key.

2.5 Convenient function

41

The [OK?] mark will flash on the LCD once you select
the data to clear so that you can confirm your intentions.
Press the OK key again to clear the data.

• To cancel, press the Fn key.

• To return to resistance measurement or current mea­surement mode, press the Fn key again or the A/Ω
key.

2.5 Convenient function

42

Making measurements with an Android™ handset
(FT6381 only)

By enabling the FT6381’s Bluetooth® function, you can transfer
measurement data to an Android™ handset to create measure­ment reports. For more information, refer to the help function of
the FT6381 Communication Software, an app for Android™
handsets.

In addition to installing the application, the following two sets of
connection settings must be configured in order to use the Blue-

®

function:

tooth

• Pairing the Android™ handset and FT6381

• Registering the FT6381 connection with the FT6381 Commu­nication Software

Use the following procedure to configure the connection settings:

Measurement process

Enable the FT6381’s Bluetooth® function.

1.

Pair the instrument with the Android™ hand-

2.

set.

Install the FT6381 Communication Software

3.

on the Android™ handset.

Register the instrument you wish to connect

4.

with the FT6381 Communication Software.

(p.43)

(p.44)

(p.45)

(p.46)

2.5 Convenient function

43

Enabling the Bluetooth® function on the FT6381

Press the Fn key to enter function mode.

1.

*

For more information about function mode, see (p.50).

Using the ▼ and ▲ keys, select the Bluetooth® Setting

2.

screen and press the OK key.

Using the ▼ and ▲ keys, select “on” on the Bluetooth
Setting screen and press the OK key to enable the Blue-

®

function.

tooth

Use of Bluetooth® functionality shortens the battery life
compared to normal use. It is recommended to turn off
Bluetooth

®

functionality when not in use.

®

2.5 Convenient function

44

0000

Pairing is only necessary the first time you use the instru­ment with the handset. When using multiple FT6381 instru­ments, you will need to pair each instrument.

2

4

Enter

3

Pairing the instrument with an Android™ handset
(first use only)

Select [Wireless and Networks] from the Android™

1.

handset’s Settings button.
After enabling the Bluetooth® function, select [Scan for

2.

devices] from [Bluetooth settings] (exact words varies

with the specific Android™ handset being used; variants
include “Search for devices” and “Detect nearby terminals”).

When the handset d iscov ers [ FT6381#XX XXXXXXX] (where

3.

“XXXXXXXXX” is the serial number found on the back of the
instrument), pair the instrument.
Note that previousl y paired devices may appear in a separate
column labeled with language such as “Paired devices” rather
than in the search results.

Enter [0000] as the PIN number.

4.

2.5 Convenient function

45

Enter and search.

Download

*The screen contents vary with the specific Android™ handset

being used. For more information about Bluetooth

®

device pair­ing methods and related procedures, see your Android™ hand­set’s instruction manual.

Installing the FT6381 Communication Software on
the Android™ handset

Search for “FT638” on the Google Play™ store and download
and install the FT6381 Communication Software.
A Google account is required in order to download applications
from the Google Play™ store. For more information about how
to register for a Google account, contact the st ore from which
you purchased the Android™ handset.

2.5 Convenient function

46

Select

The application is free, but the user is responsible for
any Internet connection costs incurred in the course of
downloading or using the application. Since such costs
may be incurred during use of the application, it is rec­ommended to use a fixed-price plan. Hioki is not liable
for any Internet connection costs.

Registering the instrument you wish to connect
with the FT6381 Communication Software

Turn on the FT6381.

1.

Launch the FT6381 Communication Software on the
Android™ handset. If you wish to use the map function,
enable the GPS function.

From the list of Bluetooth® devices, select [FT6381#XX

2.

XXXXXXX] and press the [Settings] button. The

FT6381 will be registered.

Once the instrument has been paired, it will connect automati­cally, and FT6381 measured values will be sent to the Android™
handset in real time. The instrument will not be able to connect
to the handset if it has not been paired. Refer to "Pairing the
instrument with an Android™ handset (first use only) (p .44)" to
pair the instrument.

2.5 Convenient function

47

• The screen contents vary with the specific Android™
handset being used. F or more information ab out Blue-

®

device pairing methods and related procedures,

tooth
see your Android™ handset’s instruction manual.

• Communications between the FT6381 and Android™
handset are limited to a range of about 10 m, but
obstacles (walls, metal shielding, etc.) can shorten this
distance or prevent communications from being estab­lished.

• The FT6381’s wireless function use s Bluetooth

®

wire­less technology that utilizes the 2.4 GHz band. It may
not be possible to establish communications if there is
a wireless LAN (IEEE 802.11.b/g/n) or other network/
device using the same frequency band nearby.

• The application supports Android OS 2.1 or later, but
proper operation is not guaranteed on all Android™
handsets. For more information about the devices on
which proper operation has been confirmed, see the
Google Play™ Store FT6381 Communication Software
instructions.

• Adobe’s Adobe Reader, which is available free of
charge on the Google Play™ store, is required in order
to view PDF reports. Install the application before
attempting to view reports.

• The confidentiality of information contained in Blue-

®

communications sent from the FT6381 is not

tooth
guaranteed. Hioki is not liable for any unauthorized
disclosure or other issue with measured values caused
by Bluetooth
The FT6381 emits radio radiation. Because use of

•

®

communications.

devices that emit rad io radiation requi res approval in the
country of use, be careful th at use of the instrument in a
country or region other than thos e 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.

2.5 Convenient function

48

Using the FT6381 Communication Software
(second and subsequent use)

After turning on the FT6381, launch the FT6381 Communication
Software on the Android™ handset. If you wish to use t he map
function, enable the GPS function. Once the instrument has
been paired, it will connect automatically, and FT6381 measured
values will be sent to the Android™ handset in real time. The
instrument will not be able to connect to the handset if it has not
been paired. Refer to "Pairing the instrument with an Android™
handset (first use only) (p.44)" to pair the instrument.

Switching the FT6381 to connect with the
Android™ handset

If you have multiple FT6381 instruments and wish to change the
unit to connect to the handset, press the Settings button after
pressing the menu button on the Android™ handset and recon­figure the Bluetooth

If you are unable to establish a Bluetooth® connection

Check the following if you are unable to establish a Bluetooth
connection between the FT6381 and the Android™ handset:

®

device settings.

®

• Is the Bluetooth
handset and the FT6381?

• Has the FT6381 in question been paired on the Android™
handset’s Bluetooth
not been paired, refer to "Pairing the instrument with an
Android™ handset (first use only) (p.44)" to pair it.

®

function enabled on both the Android™

®

settings screen? If the instrument has

2.5 Convenient function

49

About the FT6381 Communication Software

The application provides the following functionality:

Sending measurement data (from the LCD display) to the
Android™ handset in real time

Saving and viewing measurement data (including time
stamp, GPS position data for the measurement location,
and map data)

Creating reports from measurement data

• Single reports created from measurement data from one
location

• Summary reports that present a summ ary of multiple sets
of measurement data (with the ability to add comments
and change header and footer information)

Outputting measurement data as a CSV file

Sending measurement data as an e-mail

Downloading the contents of the FT6381’s internal memory

For more information about the FT6381 Communication Soft­ware application, refer to the application help.

2.5 Convenient function

50

Current alarm settings (p.29)

Loading values from memory (p.39)

Clearing data from the

instrument’s memory (p.40)

Resistance Alarm Settings (p.27)

2.

3.

1.

While in function mode, the [ ]
mark will light up.

1.

Press the Fn key to enter func­tion mode.

2.

Using the ▼ and ▲ keys, se­lect the desired setting.

3.

Accept the setting with the OK
key.

Press the Fn key or the A/Ω key
to exit function mode.

*FT6381 only

Bluetooth® Setting (p.42)

Function mode

In function mode, the follow ing s et tings and operations are available:

• Resistance alarm settings • Current alarm settings

• Loading values from memory • Clearing data from the instrument’s

• Bluetooth

®

setting

memory

51

2.6 Advanced Settings and Functions

Press the POWER key
while holding down the

Fn key.

1

2

Advanced settings can be configured in sub-function mode. In
sub-function mode, the following settings and operations are
available:

• Measurement range displa y setting (p.52 )

• Auto-power-saving (APS) setting (p.53)

• System reset (to revert to factory settings) (p.54)

To enter sub-function mode, turn on the instrument by pressing
the POWER key while holding down the Fn ke y.

2.6 Advanced Settings and Functions

To exit sub-function mode, press the POWER key to turn off t he
instrument and then turn it back on.

2.6 Advanced Settings and Functions

52

Enabling/disabling the measurement ra nge display
function

Enter sub-function mode.

1.

Press the POWER key while holding down the Fn key.
Using the ▼ and ▲ keys, select the Range Display Setting

2.

screen and press the OK key.

Using the ▼ and ▲ keys, switch the range display function

3.

on or off and press the OK key.

The measurement range is displayed using values only.
(Example: 1,600 Ω range 1,600)
The units for the measurement range are the sam e as
for the displayed measured value.

2.6 Advanced Settings and Functions

53

The APS function is enabled
when the screen shows [on].

Enabling/disabling the auto-power-saving (APS)
function

The auto-power-saving (APS) function prevents unintentional
battery consumption when you forget to turn off the instrument.
The APS function activates automatically when the instrument is
turned on. The instrument will automatically turn off once about
5 minutes pass without any operation (an alarm will sound for
about 10 seconds first).
Pressing any key while the alarm sounds will reset the time
before the instrument turns off to about 5 minutes.

Enter sub-function mode.

1.

Press the POWER key while holding down the Fn key.
Using the ▼ and ▲ keys, select the APS Setting screen

2.

and press the OK key.

Using the ▼ and ▲ keys, switch the APS function on or off

3.

and press the OK key.
When the APS function is disabled in sub-function mode,
APS will remain disabled when the instrument’s power is
cycled.

2.6 Advanced Settings and Functions

54

To disable APS temporarily

Turn on the instrument by pressing the POWER key
while holding down the HOLD key to disable APS until
the next time the instr umen t’ s power i s cycl ed. Th e next
time the power is cy cled, APS will be en abled (as lo ng
as the APS setting is enabled in sub-function mode).

Reverting the instrument to factory settings
(system reset)

This section describes how to initialize the instrument’s settings.
All measurement data (up to 2,000 values) will be deleted.

Enter sub-function mode.

1.

Press the
Using the ▼ and ▲ keys, select the System Rese t screen

2.

and press the
Press the OK key again. The instrument wil l rever t to the fac-

3.

tory settings.

POWER

key while holding down the Fn key.

OK

key . Th e

[OK?]

mark will flash.

• If the System Reset screen is displayed by mistake,
cycle the instrument's power without pressing the OK
key. Instrument operation will be restored without a
system reset having been performed.

For more information about how to clear previously saved

•
measurement data, see "Clearing stored data (p.40)".

3.1 Measurement Specifications

55

Specifications Chapter 3

3.1 Measurement Specifications

Common measurement specifications

Guaranteed
accuracy period

Accuracy guaran­tee for tempera­ture and humidity

Temperature
characteristics

Maximum rated
voltage to earth

Resistance measurement specific atio ns

Guaranteed
accuracy
conditions

Measurement
Method

Injected signal
frequency

Injected voltage
level

Effective
measuring range

Zero suppression Less than 0.02 Ω
Overrange Greater than 1600 Ω
Measurement

response time

1 year (Opening and Closing of the Sensor: Maximum 10000
times)

23°C±5°C (73°F±9°F) 80%RH or less (non-condensation)

-10 to 50°C Measurement accuracy x 0.1/°C (except 23°C±5°C)

600 VAC measurement category IV (anticipated tran­sient over voltage 8000 V)

No reactance component, no noise current

Analog synchronous detection method (effective resistance mea­surement)

Approx. 2.4 kHz

Approx. 9.0 mV (with load open)

0.02 Ω to 1600 Ω

Filter: OFF/ON Approx. 3 sec /Approx. 9 sec.

3.1 Measurement Specifications

56

Range

(Accuracy Range)

0.20 Ω (0.02 Ω to 0.20 Ω) 0.01 Ω ±1.5%rdg.±0.02 Ω

2.00 Ω (0.18 Ω to 2.00 Ω) 0.01 Ω ±1.5%rdg. ±0.02 Ω

20.00 Ω (1.80 Ω to 20.00 Ω) 0.01 Ω ±1.5%rdg.±0.05 Ω

50.0 Ω (18.0 Ω to 50.0 Ω*)0.1 Ω ±1.5%rdg.±0.1 Ω

100.0 Ω (50.0 Ω

200.0 Ω (100.0 Ω

400 Ω (180 Ω to 400 Ω*)1 Ω ±5%rdg.±5 Ω

600 Ω (400

1200 Ω (600 Ω* to 1200 Ω*) 10 Ω ±20%rdg.

1600 Ω (1200Ω* to1600 Ω) 20 Ω ± 35%rdg.

*To obtain the measurement accuracy at a range boundary, apply the accuracy of the

higher-accuracy range.

*

to 100.0 Ω*)0.1 Ω ±1.5%rdg.±0.5 Ω

*

to 200.0 Ω)0.2 Ω ±3.0%rdg.±1.0 Ω

Ω*

to 600 Ω*)2 Ω ±10%rdg.±10 Ω

Resolution Accuracy

3.1 Measurement Specifications

57

Frequency [Hz]

Gain [db]

Current measurement specifications

Guaranteed ac­curacy conditions

Measurement
method

Crest factor 5.0 or less (for the 60 A range, 1.7 or less)
Conductor

position effects
Magnetic field

interference
Maximum allow-

able input

Sine wave input

Digital sampling method (true RMS measurement)

Within ±0.5% rdg. (using the center of the senso r as the reference ,
in all positions)

10 mA or less in an external magnetic fie ld of 400 A/m at 50/6 0 H z
AC

100 A AC continuous, 200 A AC for 2 minutes (50/60 Hz)
For frequency derating characteristi cs during continuou s input, see
the following diagram:

Effective
measuring range

Zero-suppression
Overrange Greater than 60.0 A
Measurement

response time

0.05 mA to 60.0 A

Less than 0.05 mA

Approx. 1 sec.
regardless of whether the filter is set to OFF or ON.

3.1 Measurement Specifications

58

Range

(Accuracy Range)

20.00 mA

(1.00 mA to

20.00 mA)

200.0 mA

(18.0 mA to

200.0 mA)

2.000 A

(0.180 A to

2.000 A)

20.00 A

(1.80 A to

20.00 A)

60.0 A

(18.0 A to

60.0 A)

Resolu-

tion

0.01mA

0.1mA

0.001 A

0.01 A

0.1 A

Guaranteed

accuracy

frequency range

45 ≤ f ≤ 66 Hz

30 ≤ f < 45 Hz

66 < f ≤ 400 Hz

45 ≤ f ≤ 66 Hz

30 ≤ f < 45 Hz

66 < f ≤ 400 Hz

45 ≤ f ≤ 66 Hz

30 ≤ f < 45 Hz

66 < f ≤ 400 Hz

45 ≤ f ≤ 66 Hz

30 ≤ f < 45 Hz

66 < f ≤ 400 Hz

45 ≤ f ≤ 66 Hz

30 ≤ f < 45 Hz

66 < f ≤ 400 Hz

Accuracy

Filter off Filter on

±2.0%rdg.

±0.05 mA

±2.5%rdg.

±0.05 mA

±2.0%rdg.

±0.5 mA

±2.5%rdg.

±0.5 mA

±2.0%rdg.

±0.005 A

±2.5%rdg.

±0.005 A

±2.0%rdg.

±0.05 A

±2.5%rdg.

±0.05 A

±2.0%rdg.

±0.5 A

±2.5%rdg.

±0.5 A

±2.0%rdg.

±0.05 mA

±2.0%rdg.

±0.5 mA

±2.0%rdg.

±0.005 A

±2.0%rdg.

±0.05 A

±2.0%rdg.

±0.5 A

--

--

--

--

--

3.2 General Specifications

59

3.2 General Specifications

Location for use P ollution Degree 2, altitude up to 2000 m (6562-ft.)
Storage

temperature
and humidity

Operating
temperature
and humidity

Dielectric strength
Applicable

standards

Dust and water
protection

Power supply LR06 alkaline battery × 2 (3 VDC)
Maximum rated

power
Continuous

operating time
Dimensions Approx. 73 W×218 H ×43 D mm (2.87” W×8.58”H × 1.69”D) ( exclud-

Maximum
measurable con­ductor diameter

Mass Approx. 620g (21.9 oz) Except for the battery
Accessories Carrying case (1), Resistance check loop (1), Strap (1),

Display specifications

LCD display Max. 2,000 count
Display refresh

rate
Range switching Auto-range
Overrange

display
Data hold

display

-20 to 60°C (-4.0°F to 140°F), 80%RH or less (non-condensation,
except for the battery)

Temperature : -10 to 50°C (14°F to 122°F)
Humidity : 80%RH or less (non-condensation)

Between the Case and the Clamp core 7400 Vrms 1 minute
Safety : EN61010

EMC : EN61326
Effects of radiated, radiofrequ ency, electro magnetic field: At 3 V/m,
5X accuracy specifications or less (resistance measurement)

IP40 (EN60529)
*With clamp sensor closed.

450 mVA

Approx. 35 hours (25 Ω measurement, backlight off,
Bluetooth® OFF (Model FT6381), 23°C reference

ing projections)
φ32 mm

LR06 alkaline battery × 2, Instruction manual (1)

Approx. 2 times/sec.

[O.L] display

mark lights up.

3.2 General Specifications

60

Function mode
display

Filter display mark lights up.
Auto-power-save

display
Remaining

battery display
Memory number

display
Range display mark lights up.
Alarm display mark lights up.
Confirmation of

memory erasure
and reset
operation

Noise mark
display

mA/A unit
display

Ω unit display Ω mark lights up.
AC current mark

display
Resistance mark

display
Inductance mark

display
Capacitance

mark display
Bluetooth®

display

mark lights up. Flashes in subfunction mode.

mark lights up

Display of remaining battery power in 4 stages ( )

mark lights up.

mark lights up.

mark lights up.
(When there is a superimposed noise current during resistance
measurement, accuracy cannot be guaranteed.)

mA mark or A mark lights up.

mark lights up (during AC current measurement).

mark lights up (during resistance measurement).

mark lights up (when the phase angle θ > approx. 45° dur-

ing resistance measurement).

mark lights up (when the phase angle θ < approx. -4 5° dur­ing resistance measurement).

Bluetooth® function off: mark turns off (Model FT6381).
Bluetooth® function on/communications inactive: mark lights up
(Model FT6381).
Bluetooth® function on/communications active: mark flashes
(Model FT6381).

3.2 General Specifications

61

Function specifications (underline: default v a lu e )

Data hold function
Backlight functionAutomatically turns off approx. 2 min. after last key operation.
Filter function
Resistance

measurement
filter function

Current
measurement
filter function

Alarm function
Resistance alarm

function
Current alarm

function
Alarm Hi/Lo Separate Hi/Lo settings for resistance measurement and current

Alarm threshold
setting range

Memory function
Memory capacity 2,000 values
Auto-power-save

function
Function mode
Moving between

items
Resistance alarm

function
Current alarm

function
Loading memory

values
Clearing

memory values
Bluetooth®

operating setting

Moving average time: Max. 9 sec.

Cutoff frequency: 180 Hz ±30 Hz (-3 dB)

Resistance measurement mode alarm: Beeps when measured
value is less than or greater than threshold.

Current measurement mode alarm: Beeps when measured value
is less than or greater than threshold.

measurement
Resistance measurement: Hi.AL/Lo.AL
Current measurement: Hi.AL/Lo.AL

Resistance measurement: 0.02 Ω to 1,600 Ω
Resistance measurement initial value: 25.0 Ω
Current measurement: 0.05 mA to 200.0 mA, 0.201 A to 60.0 A
Current measurement initial value: 1.00 mA

Instrument automatically turns off approx. 5 min. after last key
operation.

After selecting setting item with ▼ and ▲ keys, accept with OK
key.

AL Ω: Resistance Hi/Lo, threshold settings

AL A: Current Hi/Lo, threshold settings

MEM READ: Load memory values.

MEM CLR: Clear last saved memory value or all values.

BT: ON/OFF (FT6381)

3.2 General Specifications

62

Sub-function mode
Range display

function
Auto-power-save

function
System reset SYS RST
Bluetooth®

function
(FT6381)

RNG: ON/OFF

APS: ON/OFF

Bluetooth® 2.1+ EDR (Class 2)
Communication range: 10 m (Line-of-sight)
Displays measured values on the screen of an Android™ handset
via Bluetooth®.

4.1 Cleaning

63

Maintenance and Service Chapter 4

4.1 Cleaning

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 remov e 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.

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

• To clean the instrument, wipe it gently with a soft cloth
moistened with water or mild detergent. Never use sol­vents such as benzene, alcohol, acetone, ether,
ketones, thinners or gasoline, as they can deform and
discolor the case.

4.2 Troubleshooting

64

4.2 Trou bleshooting

Inspection and Repair

If damage is suspected, check the "Before returning for
repair" section before contacting your dealer or Hioki
representative.

Transporting

• When sending the instrument for repair, remove the batteries
and pack carefully to prevent damage in transit. Include cush­ioning material so the instrument cannot move within the pack­age. Be sure to include details of the problem. Hioki cannot be
responsible for damage that occurs during shipment.

• Use the original packing materials when transporting the
instrument, if possible.

Before returning for repair

Symptom Cause Remedy

No screen is dis­played even
when the instru­ment is turned on.

The screen turns
off after a little
while.

• Are the batteries
correctly inserted?

• Is the useful bat­tery life at an end?

• Is the useful bat­tery life at an end?

• Has the APS func­tion been trig­gered?

Insert the new batter­ies.(p.21)

(p.53)

4.3 Error Display

65

4.3 Error Display

If an error is shown on the LCD, the instrument needs to be
repaired. Contact your dealer or Hioki representative.

Error Display Meaning Remedial Action
E001 Main CPU program error
E002 Sub CPU program error
E003 EEPROM R/W error
E004 Adjustment data error

Please contact your dealer
or Hioki representative.

4.3 Error Display

66

FT6380
FT6381

CLAMP ON EARTH TESTER

Manual de Instrucciones

March 2014 Revised edition 1 FT6380A983-01 (A981-03)

Spanish

Índice

Introducción .........................................................................1

Chequeo del contenido del paquete .................................... 2

Información de seguridad .................................................... 3

Precauciones de operación ................................................. 7

Capítulo 1 Información general 11

1.1 Información general del producto ...................... 11

1.2 Características .................................................. 12

1.3 Nombres y funciones de las partes ................... 14

 Botón de operación ............................................ 16

 Indicadores en pantalla ...................................... 17

Capítulo 2 Medición 19

2.1 Proceso de medición ......................................... 19

2.2 Preparación para la medición ........................... 20

 Montaje de correa ..............................................20

 Colocación (o cambio) de las baterías............... 21

2.3 Inspección preoperativa .................................... 23

 Uso del lazo de referencia de resistencia incluido

para inspeccionar el instrumento ....................... 24

2.4 Procedimiento de medición ............................... 25

 Medición de la resistencia.................................. 26

 Medición de corriente.........................................30

2.5 Funciones útiles ................................................34

 Función de retención de datos (retención del valor

medido) .............................................................. 34

 Función de retroiluminación (realización de

mediciones en lugares oscuros) ........................ 34

 Función de filtro (rechazo de ruido) ................... 35

 Función de alarma (evaluación de los valores

medidos y emisión de una alarma) .................... 36

 Función de memoria (guardado de los datos de

medición)............................................................39

i

ii

 Toma de mediciones con un celular Android™ (solo

el modelo FT6381) .............................................43

 Activación de la función de Bluetooth® en el modelo

FT6381 ...............................................................44

 Emparejamiento del instrumento con un celular

Android™ (solo la primera vez) ..........................45

 Instalación de la aplicación FT6381 Communication

Software en un celular Android™....................... 46

 Registro del instrumento que desea conectar

mediante la aplicación FT6381 Communication

Software .............................................................47

 Cambio de instrumento FT6381 a conectar con el

celular Android™................................................49

 Utilización de la aplicación FT6381 Communication

Software (la segunda vez y posteriores) ............49

2.6 Ajustes y funciones avanzados .........................52

 Activación/desactivación de la función de

visualización del rango de medición...................53

 Activación/desactivación de la función de ahorro

automático de energía (APS) .............................54

 Restablecimiento del instrumento a la configuración

de fábrica (restablecimiento del sistema) ...........55

Capítulo 3 Especificaciones 57

3.1 Especificaciones de medición ...........................57

3.2 Especificaciones generales ...............................61

Capítulo 4 Mantenimiento y servicio 65

4.1 Limpieza ............................................................65

4.2 Resolución de problemas ..................................66

 Inspección y reparación......................................66

 Antes de devolver para su reparación ................66

4.3 Visualización de errores ....................................67

Introducción

Introducción

Gracias por adquirir el MEDIDOR DE RESISTENCIA DE TIE­RRA TIPO GANCHO modelo FT6380, FT6381 de HIOKI. Para
obtener el máximo rendimiento del instrumento, lea primero este
manual y téngalo a mano para futuras consultas.

Marcas comerciales registradas

®

• Bluetooth
SIG, Inc. (EE.UU.).

• Android
de Bluetooth

• Adobe y Reader son marcas comerciales registradas o mar­cas comerciales de Adobe Systems Incorporated en los Esta­dos Unidos y/o en otros países.

es una marca comercial registrada de Bluetooth

TM

Google PlayTM es una marca comercial registrada

®

Google, Inc.

1

Chequeo del contenido del paquete

2

Chequeo del contenido del paquete

Cuando reciba el instrumento, inspecciónelo cuidadosamente
para asegurarse de que no ha sufrido ningún daño durante el
envío. En particular, chequee los accesorios, los interruptores
del panel y los conectores. Si el daño es evidente o si no fun­ciona según las especificaciones, póngase en contacto con
su distribuidor o representante de Hioki.

Contenido del paquete

Confirme que se incluyen estos contenidos.

□ Medidor de Resistencia de Tierra tipo Gancho modelo FT6380 o

FT6381 (1)

□ Lazo de Referencia para Re-

sistencia (1)

□ Manual de instrucciones (1)

□ Funda de Transporte (1)
□ Baterías alcalinas LR6 (2)
□ Correa (1)

Utilice los materiales de empaque originales cuando transporte el instru­mento, si es posible.
Para el resto de notas de transporte, consulte “Transporte (p.66)”.

Información de seguridad

Información de seguridad

Este instrumento está diseñado para cumplir con las normas de
seguridad IEC 61010 y ha superado los test de seguridad antes
del envío. Sin embargo, un manejo inadecuado durante el uso
podría provocar lesiones o la muerte, así como daños al instru­mento. Sin embargo, si se utiliza el instrumento de una manera no
descrita en este manual, puede anular los elementos de seguri­dad que se proporcionan. Asegúrese de comprender las instruc­ciones y precauciones del manual antes de su uso. Negamos
cualquier responsabilidad por accidentes o lesiones que no sean
consecuencia directa de los defectos del instrumento.

Este manual contiene información y advertencias esenciales
para garantizar la seguridad durante el funcionamiento del ins­trumento y para su mantenimiento en condiciones de funciona­miento seguras. Antes de utilizarlo, asegúrese de leer
atentamente las siguientes precauciones de seguridad.

Símbolos de seguridad

En el manual, el símbolo indica una información
especialmente importante que el usuario debe leer
antes de utilizar el instrumento.

El símbolo impreso en el instrumento indica que el
usuario debe consultar el tema correspondiente en el
manual (marcado con el símbolo ) antes de utilizar la
función en cuestión.

Indica un dispositivo con doble aislamiento.

Indica CA (corriente alterna).

Indica que el instrumento puede estar conectado o des­conectado de un circuito con corriente.

Indica el botón de encendido/apagado.

3

Información de seguridad

4

Los siguientes símbolos en este manual indican la importancia
relativa de las precauciones y advertencias.

Indica que un funcionamiento incorrecto supone
un gran riesgo que podría provocar lesiones gra­ves o la muerte del usuario.

Indica que un funcionamiento incorrecto supone
un riesgo importante que podría provocar lesiones
graves o la muerte del usuario.

Indica que un funcionamiento incorrecto supone la
posibilidad de provocar lesiones al usuario o
daños al instrumento.

Indica los elementos de recomendación relaciona­dos con el rendimiento o el correcto funciona­miento del instrumento.

Símbolos de varias normas

Marca de residuos de aparatos eléctricos y electró­nicos (RAEE):
Este símbolo indica que el aparato eléctrico y elec­trónico se lanza al mercado de la UE después del
13 de agosto de 2005 y los productores de los
Estados miembros están obligados a mostrarlo en
el aparato en virtud del artículo 11.2 de la Directiva
2002/96/CE (RAEE).

Este símbolo indica que el producto cumple con las
normas de seguridad establecidas por la Directiva
CE.

FCC ID

Indica que el producto incorpora tecnología inalám­brica Bluetooth
cial registrada de Bluetooth SIG, Inc. y se utiliza
bajo licencia por HIOKI E.E. CORPORATION.

Indica que el producto cumple con las normas téc­nicas nacionales de Japón establecidas en la Ley
sobre la radio (tipo de certificación).

Indica el número de identificación del módulo ina­lámbrico certificado por la Comisión Federal de
Comunicaciones (FCC) de los EE.UU.

®

. Bluetooth® es una marca comer-

IC

Indica el número del módulo inalámbrico certificado
por el Ministerio de Industria de Canadá.

Otros símbolos

Indica una acción prohibida.

Información de seguridad

5

(p. n.º)

[ ]

Fn

(caracteres

en negrita)

Indica la ubicación de la información de referencia.

La información que se muestra en pantalla apa­rece entre corchetes.

El texto en negrita indica los caracteres alfanuméri­cos mostrados en los botones de operación.

La pantalla de este instrumento muestra los caracteres de la
siguiente forma.

Visualizaciones en pantalla que difieren de la notación anterior:

Visualización si se superan los parámetros

Medición de la resistencia: cuando la lectu­ra excede los 1600 Ω.
Medición de la corriente: cuando la lectura
excede los 60,0 A.

Visualización si hay abertura

Esta pantalla se muestra cuando el sensor
de gancho no está completamente cerrado
durante la utilización de la función de medi­ción de la resistencia.

Información de seguridad

6

Categorías de medición

Este instrumento cumple con los requisitos de seguridad de la
CAT IV.
Para garantizar la seguridad durante el funcionamiento de los instru­mentos de medición, la IEC 61010 establece cuáles son las normas
de seguridad para los diversos entornos eléctricos, categorizadas
como CAT II a CAT IV y denominadas categorías de medición.

Circuitos eléctricos principales de los equipos conec­tados a un tomacorriente de CA mediante un cable de

CAT II

CAT III

CAT IV

El uso de un instrumento de medición en un entorno designado
con una categoría de número superior al de aquella para la que
el instrumento está clasificado podría provocar un accidente
grave y debe evitarse cuidadosamente.
El uso de un instrumento de medición que no está clasificado como
CAT en la medición de aplicaciones de CAT II a CAT IV podría pro­vocar un accidente grave y debe evitarse cuidadosamente.

alimentación (herramientas portátiles, electrodomésti­cos, etc.).
La CAT II contempla la medición directa de los toma­corrientes.

Circuitos eléctricos principales de maquinaria pesada
(instalaciones fijas) conectados directamente al panel
de distribución y los alimentadores, desde el panel de
distribución a los tomacorrientes.

El circuito desde la acometida del servicio a la entrada
de servicio y al medidor de potencia y el equipo princi­pal de protección contra sobrecargas eléctricas (panel
de distribución).

Precauciones de operación

Precauciones de operación

Siga estas precauciones para garantizar la seguridad durante el
funcionamiento y para obtener todos los beneficios de las dife­rentes funciones.

Chequeos preliminares

Antes de utilizar el instrumento por primera vez, verifique que fun­ciona normalmente para asegurarse de que no ha sufrido ningún
daño durante el almacenamiento o el envío. Si está dañado, pónga­se en contacto con su distribuidor o representante de Hioki.

Instalación del instrumento

Temperatura de funcionamiento: de -10 a 50 °C
(Asegúrese de utilizar baterías adecuadas para usar en las condicio­nes ambientales en las que está utilizando el instrumento.) Humedad
de funcionamiento: 80 % de HR o menos (sin condensación)

Evite las siguientes ubicaciones que podrían provocar un
accidente o daños al instrumento.

Expuestas a la luz di­recta del sol
Expuestas a altas
temperaturas

Expuestas a agua, acei­te, disolventes u otros
productos qu ímicos
Expuestas a n iveles ele­vados de humedad o
condensación

Expuestas a niveles
elevados de partícu­las de polvo

Sometidas a vibra­ciones

En presencia de gases
explosivos o líquidos
corrosivos

Expuestas a fuertes
campos electromag­néticos
Cerca de radiadores
electromagnéticos

Cerca de radiadores
electromagnéticos (p.
ej., sistemas de calenta­miento por inducc ión de
alta frecuencia y u tensi­lios de cocina de calen­tamiento por inducción)

7

Precauciones de operación

8

Manejo del instrumento

• Para evitar cortocircuitos y posibles peligros mortales,
nunca conecte el gancho a un circuito que opera en más
de 600 V o sobre cables conductores desnudos.

• La tensión nominal máxima entre los terminales de
entrada y la puesta a tierra es de 600 V CA. La medición
de un voltaje que sobrepase este valor con respecto a la
puesta a tierra podría dañar el instrumento y provocar
lesiones corporales.

• Para evitar una descarga eléctrica, no retire la cubierta
del instrumento. Los componentes internos del instru­mento llevan voltajes altos y pueden llegar a calentarse
mucho durante el funcionamiento.

• Cuando el sensor de gancho se abre, no permita que la
parte metálica del gancho toque cualquier metal
expuesto, ni que se produzca un cortocircuito entre dos
líneas, ni lo utilice sobre cables conductores desnudos.

Para evitar una descarga eléctrica al medir las líneas con
corriente, utilice el equipo de protección adecuado, como
guantes de goma aislantes, botas y un casco de seguridad.

Precauciones de operación

• No introduzca una corriente que sobrepase la corriente máxi­ma permitida. Si lo hace, podría dañar el instrumento o provo­car quemaduras.
La corriente máxima permitida es de 100 A CA de forma con­tinua o de 200 A CA en un intervalo de dos minutos a 50/
60 Hz. Para obtener más información acerca de las caracte­rísticas de reducción de potencia por frecuencia durante una
entrada continua, consulte el siguiente diagrama:

Corriente [A]

Frecuencia [Hz]

• Para evitar daños al instrumento, protéjalo de golpes durante
su transporte y manejo. Tenga especial cuidado de evitar gol­pes por caídas.

• Tenga cuidado de evitar la caída del instrumento o de some­terlo de cualquier otra manera a un impacto mecánico que
podría dañar las superficies de contacto del núcleo y afectar
negativamente a la medición.

• Aunque este instrumento es resistente al polvo, no es comple­tamente estanco. Para evitar posibles daños, evite su uso en
entornos polvorientos o húmedos.

• No incline el dispositivo ni lo coloque sobre una superficie irre­gular. Si el dispositivo se cae o se tira puede provocar lesio­nes o daños al dispositivo.

9

Precauciones de operación

10

• El grado de protección de la carcasa de este dispositivo
(basada en el estándar EN60529) es *IP40. (El grado de pro­tección se aplica al sensor de gancho cuando está en posi­ción de cierre.)

*IP40
Esto indica el grado de protección proporcionado por la carcasa
del dispositivo frente al uso en ubicaciones peligrosas, la pene­tración de impurezas sólidas y la entrada de agua.
4: Protegido contra el acceso a las piezas peligrosas con un

alambre que mida 1,0 mm de diámetro. Los dispositivos del
interior de la carcasa está protegida contra la penetración de
impurezas sólidas de más de 1,0 mm de diámetro.

0: Los dispositivos del interior de la carcasa no está protegida

contra los efectos perjudiciales del agua.

1.1 Información general del producto

11

Información general Capítulo 1

1.1 Información general del producto

Los modelos FT6380 y FT6381 del Medidor de Resistencia de
Tierra tipo Gancho realizan mediciones de resistencia de puesta
a tierra simplemente al engancharse a varios cables con puesta
a tierra múltiple. No se precisa una varilla de puesta a tierra
auxiliar y no es necesario desconectar el cable de puesta a tie­rra de la varilla de puesta a tierra.

Los instrumentos también cuentan con una función de medición de
corriente CA y pueden medir corrientes: desde corrientes de fuga
del orden de varios mA hasta corrientes de carga de hasta 60 A.

El FT6381 emite radiaciones radioeléctricas. El uso de dispositi­vos que emiten radiaciones radioeléctricas requiere la aprobación
en el país de uso, por ese motivo tenga cuidado al utilizar este
instrumento en un país o región distinto a los enumerados en el
folleto de precauciones adjunto, “Precauciones relativas al uso de
equipos que emiten ondas de radio”, o en el sitio web de los pro­ductos HIOKI, ya que este uso puede sancionarse como una
infracción de la ley.

1.2 Características

12

1.2 Características

Sensor compacto

El sensor compacto se puede utilizar para engancharlo a los cables
con puesta a tierra con facilidad. El diseño del sensor acelera consi­derablemente el proceso de medición, eliminando la necesidad de
extraer los cables de puesta a tierra para su enganche o de escarbar
alrededor de la varilla o cable de puesta a tierra.

Amplio rango dinámico

El instrumento puede medir fácilmente la resistencia de puesta a tie­rra de 0,02 a 1600 Ω gracias a su función de rango automático. La
medición de la corriente comprende desde pequeñas corrientes de
fuga (resolución máxima de 10 μA) hasta un máximo de 60 A.

Función de chequeo de ruido (p.28)

El instrumento detecta automáticamente el ruido que puede afectar
a la medición de la resistencia de puesta a tierra y muestra la marca

.

Visualización del valor eficaz RMS (RMS Verdadero)

El cálculo del valor eficaz RMS permite que el instrumento mida con
precisión la distorsión en forma de onda de las corrientes.

Función de retención de datos (p.34)

Un botón grande que se pulsa con facilidad le permite retener el va­lor medido. El botón notifica al usuario del estado de la retención
parpadeando mientras se retiene el valor.

Función de retroiluminación (p.34)

El instrumento utiliza un LED blanco para proporcionar una excelen­te visibilidad. De este modo los valores se pueden leer claramente,
incluso en lugares oscuros.

1.2 Características

13

Función de ahorro automático de energía (APS) (p.54)

La función de ahorro automático de energía evita que las baterías
se agoten cuando se olvida de apagar el instrumento.

Función de alarma (p.36)

Cuando se establece un umbral, puede hacer que el instrumento
realice una evaluación como PASA/NO PASA y le notifique el resul­tado mediante un pitido. Puede establecer umbrales diferentes para
las mediciones de resistencia y de corriente, y seleccionar los crite­rios de evaluación (si se genera un resultado de NO PASA cuando
la lectura es mayor o menor que el umbral).

Función de filtro (p.35)

El uso generalizado de fuentes de alimentación conmutadas y de in­versores ha dado lugar a casos en los que los componentes armó­nicos se superponen a las formas de onda de la corriente de fuga.
La función de filtro del instrumento le permite realizar dos tipos de
medición: corriente de fuga en relación a la degradación del aisla­miento y corriente de fuga incluyendo este componente armónico.

Memoria interna (p.39)

La memoria interna del instrumento puede registrar hasta 2000 va­lores medidos.

Función de informe automático de medición con
conectividad Android

El modelo FT6381 cuenta con tecnología inalámbrica Bluetooth® y
se puede conectar a un smartphone con sistema operativo Android
para crear fácilmente informes de medición en sitio. (La disponibili­dad del modelo FT6381 se limita a ciertos países. Para obtener más
información, póngase en contacto con su distribuidor o representan­te de Hioki.)

™ (*solo el modelo FT6381) (p.43)

1.3 Nombres y funciones de las partes

14

1.3 Nombres y funciones de las partes

Parte frontal

FT6380 FT6381

Sensor de gancho

Barrera

Botón de encendido

(POWER)

Botón de retención

(HOLD) (p.34)

Botón A/Ω

Botón de

retroiluminación (p.34)

Indicador en pantalla

(p.17)

Botón de operación

(p.16)

Botón de
encendido
(POWER)

Botón de
retención
(HOLD)

Botón de
retroiluminación

Botón A/Ω

• Se utiliza para encender y apagar el instrumento.

• Para cancelar temporalmente la función de ahorro auto­mático de energía, pulse el botón de encendido
mientras mantiene pulsado el botón de retención

POWER

HOLD

• Retiene la visualización del valor medido o cancela el
modo de retención.

• Para cancelar la función de ahorro automático de ener­gía, pulse el botón de encendido POWER mientras
mantiene pulsado el botón de retención HOLD.

• Activa y desactiva la retroiluminación.

• Cambia entre el modo de medición de la resistencia y
el modo de medición de la corriente.

.

Parte posterior

1.3 Nombres y funciones de las partes

15

FT6380

Parte inferior

N.º de serie

Tapa de las

baterías

(p.21)

FT6381

Orificio para la correa

(p.20)

1.3 Nombres y funciones de las partes

16

Botón de operación

Botón Descripción

Cambia al modo de función, que se utiliza para configurar los
ajustes. Si pulse este botón de nuevo volverá al modo de
medición de la resistencia o al modo de medición de la
corriente.

• Activa la función de alarma. (p.36)

• Cuando se activa la función de alarma, el instrumento notifi­cará al usuario mediante un pitido si una lectura es mayor
que (o menor que) un umbral ajustado previamente.

• Los ajustes del umbral de la función de alarma se pueden
configurar en el modo de función. (p.38)

*En el modo de función, este botón sirve como botón

se utiliza para seleccionar los elementos y valores de ajuste.

• Si pulse este botón mientras utiliza la función de medición
de corriente, se activa el filtro de paso bajo para rechazar
los componentes armónicos innecesarios. (p.35)

• Si se pulsa mientras utiliza la función de medición de la
resistencia, se activa la función de media móvil, lo que per­mite una medición más estable. (p.35)

*En el modo de función, este botón sirve como botón

se utiliza para seleccionar los elementos y valores de ajuste.

Guarda los datos de medición en la memoria interna del ins­trumento. (p.39)

*En el modo de función, este botón sirve como botón

que se utiliza para aceptar los elementos y valores de
ajuste.

▼, que

▲, que

OK,

1.3 Nombres y funciones de las partes

Indicadores en pantalla

Se ilumina cuando se retienen los datos. (p.34)

Se ilumina en el modo de función. (p.51)
Parpadea en el modo de subfunción. (p.52)

Se ilumina cuando se activa la función de alarma. (p.36)

Se ilumina cuando se activa la función de filtro. (p.35)

Se ilumina cuando se activa la función de Bluetooth
dea cuando se envían o reciben datos. (Solo el modelo
FT6381) (p.43)

Se ilumina cuando se activa la función de ahorro automático
de energía. (p.54)

Indica el nivel de carga restante de las baterías. (p.22)

Se ilumina en el modo de medición de la corriente CA. (p.30)

Se ilumina en el modo de medición de la resistencia. (p.26)

Se ilumina en el modo de medición de la resistencia cuando
se detecta una corriente que podría afectar el valor medido.
(p.28)

Se ilumina en el modo de medición de la resistencia cuando
el lazo de tierra medido tiene un componente de alta reactan­cia o un componente de capacitancia (
se ilumina el indicador [ ] debido a un valor de medición
de la resistencia bajo, es probable que el valor visualizado
indique un lazo de medición cortocircuitado en lugar de una
resistencia de puesta a tierra normal. Cuando se ilumina el
indicador [
cuito. En este caso, el indicador señala que los cables se han
acoplado por capacitancia.) (p.28)

], el lazo podría presentar una apertura de cir-

±45° o más). (Cuando

®

. Parpa-

17

1.3 Nombres y funciones de las partes

18

Se ilumina durante las operaciones de la memoria interna.
(p.39)
El número de puntos de datos de medición almacenados en
la memoria se muestra a la derecha.

Se ilumina cuando se activa la función de visualización del
rango.
El rango de medición se muestra a la derecha.

2.1 Proceso de medición

Medición Capítulo 2

2.1 Proceso de medición

1

Preparación para la medición

Inspección preoperativa (p.23)
Uso del lazo de referencia de resistencia incluido para ins-

peccionar el instrumento (p.24)

2

Medición

Medición de la resistencia (p.26)
Medición de corriente (p.30)

3

Fin de la medición

Retire el instrumento del objeto de medición.
Apague el instrumento.

19

2.2 Preparación para la medición

20

2.2 Preparación para la medición

Luego de adquirir el instrumento
Complete los siguientes pasos antes de utilizar el instrumento
para realizar mediciones.

Montaje de correa

Coloque ambos extremos de la correa al instrumento con fir­meza.
Si no se colocan con firmeza, el instrumento se podría caer y
dañar durante su transporte.

Pase la correa por el orificio para la correa, como se muestra en
el siguiente diagrama:

2.2 Preparación para la medición

21

Colocación (o cambio) de las baterías

Antes de utilizar el instrumento por primera vez, coloque dos bate­rías alcalinas de tamaño AA (LR6). Verifique que haya suficiente
carga restante en las baterías antes de la medición. Si la carga res­tante de las baterías no es suficiente, cambie las baterías.

• Para evitar una descarga eléctrica al cambiar las baterías,
desconecte primero el gancho del objeto a medir.

• Luego de cambiar las baterías, vuelva a colocar la tapa y
los tornillos antes de utilizar el instrumento.

• Las baterías pueden explotar si se manejan de forma
incorrecta. No cortocircuite, recargue, desmonte ni se
deshaga de ellas echándolas al fuego.

• Manipule y deseche las baterías conforme a las regulacio­nes locales.

• No mezcle baterías nuevas y usadas o tipos de baterías dife­rentes. Además, tenga cuidado con la polaridad de las bate­rías durante la colocación. De lo contrario, podría provocar un
rendimiento mediocre o daños por fugas en las baterías.
Para evitar la corrosión por fugas en las baterías, retire las bate-

•
rías del instrumento si no se va a utilizar durante mucho tiempo.

•

El indicador se ilumina cuando el voltaje de las baterías
es bajo. Cambie las baterías tan pronto como sea posible.

•

Antes de cambiar las baterías, asegúrese de que el inte­rruptor deslizante está apagado: en la posición OFF.

• Luego de usar, desconecte siempre la alimentación.

• Si las baterías están completamente agotadas, la pan-

talla mostrará [BAttLo] y el instrumento se apagará
automáticamente.

2.2 Preparación para la medición

22

Elementos necesarios:

• Destornillador de cabeza Phillips

• Batería alcalina LR6 (2)

Procedimiento habitual

Verifique que el instrumento está apagado.

1.

Retire los tornillos de fijación de la tapa de las bate-

2.

rías con un destornillador de cabeza Phillips.

Extraiga la tapa de las baterías.

3.

Inserte dos baterías nuevas (baterías alcalinas LR6),

4.

asegurándose de que la orientación sea la correcta.
Vuelva a colocar la tapa de las baterías y apriete los

5.

tornillos de fijación.

4

3

2

Indicador del estado de las baterías

Este indicador se muestra en la esquina superior derecha.

Cuando se han colocado baterías alcalinas nuevas.

Cuando el nivel de carga restante de las baterías es de 2/3.

Cuando el nivel de carga restante de las baterías es de 1/3.

Las baterías están agotadas. Cámbielas por baterías nuevas.

2.3 Inspección preoperativa

2.3 Inspección preoperativa

Antes de utilizar el instrumento por primera vez, verifique que
funciona normalmente para asegurarse de que no ha sufrido
ningún daño durante el almacenamiento o el envío. Si está
dañado, póngase en contacto con su distribuidor o represen­tante de Hioki.

1. Inspección del instrumento

23

• ¿El instrumento está daña­do?

• ¿El sensor de gancho está
agrietado o dañado de cual­quier otra forma?

Sí

No utilice el instrumento si es­tá dañado, ya que puede pro­vocar una descarga eléctrica.
Mande el instrumento a repa­rar.

2. Inspección del instrumento luego de encenderlo

¿La pantalla se enciende al
encender el instrumento?

Sí

Uso del lazo de referencia de re­sistencia incluido para inspec­cionar el instrumento (p.24)

No

Fin de la inspección

Se mues­tra un error.

Es posible que el instrumento
no funcione cor rectamente.
Mande el instrumento a reparar.

• La pantalla no está
encendida.

• La pantalla mues­tra un error.

Es posible que las baterías es­tén agotadas. Cambie las ba­terías y vuelva a intentarlo.

La pantalla está pren­dida.

2.3 Inspección preoperativa

24

Uso del lazo de referencia de resistencia incluido
para inspeccionar el instrumento

Antes de encender el instrumento, asegúrese de leer Precaucio­nes de operación (p.7).

Inspección del instrumento con el lazo de referencia para
resistencia

Asegúrese que no haya sustancias extrañas metidas entre las
puntas del sensor de gancho y que el sensor se puede abrir y
cerrar sin problemas. Si es así, enganche el lazo de referencia
para resistencia incluido y asegúrese que el instrumento fun­ciona correctamente. Asegúrese que se muestre un valor dentro
del rango admisible para cada lazo.

Lazo de referencia para re-

sistencia

Prueba de resistencia Rango admisible

1 Ω De 0,95 a 1,05 Ω

25 Ω De 24,3 a 25,7 Ω

• Si el instrumento muestra un valor fuera del rango
admisible, es necesario repararlo. Póngase en con­tacto con su distribuidor o representante de Hioki.

• El lazo de referencia para resistencia no se puede uti­lizar para calibrar el instrumento. Para calibrar el ins­trumento, póngase en contacto con su distribuidor.