Hioki IR4055 User manual

i
Contents
Introduction.........................................................................1
Verifying Package Contents ..............................................1
Safety Information..............................................................3
Operating Precautions.......................................................8
1 Overview 13
1.1 Product Overview..........................................13
1.2 Names and Functions of Parts ....................14
2 Preparing for Measurement 21
2.1 Replacing Batteries or Fuse.........................22
2.2 Using the Model L9788-10 Test Lead
with Remote Switch (Red) ............................25
3 Measurement 27
3.1 Pre-measurement Inspection.......................27
3.2 Auto Power Save
(Power-Saving Function)..............................28
3.3 Auto Backlight-off
(Automatic Light-off Function) ....................28
3.4 Comparator Function....................................29
Setting the Comparator............................................. 30
Canceling the Comparator........................................31
3.5 Insulation Resistance Measurement ...........32
Lock Function ........................................................... 33
Measuring Insulation Resistance..............................34
Displaying 1-minute Values
(Model IR4057, IR4058) ...........................................35
Voltage Characteristics of Measurement Terminals .... 36
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7
Appx.
索引
IR4058A961-02

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Contents
3.6 Discharging Function ...................................37
3.7 Voltage Measurement ...................................38
Negative Voltage Notication Function
(Model IR4055) .........................................................39
3.8 Low Resistance Measurement
(Model IR4056, IR4057, IR4058)....................40
3.9 PVΩMeasurement Function
(Model IR4055)...............................................42
3.10 Bluetooth®Communication Function..........49
Installing the Smartphone App GENNECT Cross.....50
Pairing the App ......................................................... 51
Making Measurements with the Bluetooth
®
Function .. 52
4 Specications 53
4.1 StandardSpecications ...............................53
4.2 GeneralSpecications .................................54
4.3 Measurement functions................................57
4.4 PVΩMeasurement (Model IR4055)..............63
4.5 ExternalInterfaceSpecications
(Model IR4055, IR4058) .................................64
5 Maintenance and Service 65
5.1 Troubleshooting ............................................66
Error Displays and Remedies ...................................70
Appendix Appx.1
Appx. 1 Measurement Principles ..................Appx.1
Appx. 2 Operation Uncertainty......................Appx.2
Appx. 3 Insulation Resistance Measurements
for Solar Cell Array ...........................Appx.3

1
Introduction
Introduction
Thank you for purchasing the Hioki IR4055-11, IR4056-20,
IR4056-21, IR4057-20, IR4058-20 Insulation Tester. To obtain
maximum performance from the instrument, please read this
Instruction Manual rst, and keep it handy for future reference.
Hereinafter, the descriptions refer to models without the sufx.
Verifying Package Contents
When you receive the instrument, inspect it carefully to ensure that no
damage occurred during shipping. In particular, check the accessories,
panel switches, and connectors. If damage is evident, or if it fails to
operate according to the specications, contact your authorized Hioki
distributor or reseller. Conrm that these contents are provided.
□Insulation Tester
IR4055, IR4056 IR4057, IR4058
□Instruction Manual □LR6 Alkaline battery × 4
□Model L9787 Test Lead*
(Only for the instruments with sufx
“-20”)
□Model L9788-11 Test Lead Set with
Remote Switch*
(Only for the instruments with sufx “-11”
and “-21”)
□Neck strap
* Model L9787 and L9788-11 are all exclusively designed for the Hioki IR4000
series. Do not use for any other purpose.
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Verifying Package Contents
Options
The following options are available for the IR4000 series. Contact
your authorized Hioki distributor or reseller when ordering.
5*6
4
3*
9243 graber L4937 マグネットアダプ
タ
L4934 小ワニグチ
マグネ付ストラップ
L9207-10
DM4910 熱電対
DT4911TestLead
DT4912TestLead
L4930 接続ケーブル
L4931renketu
L4931 延長ケーブル
L4932(+9207-10cap)
L4933 コンタクトピン
L4935 ワニ口
L4936 バスバー
9243 graber L4937 マグネットアダプ
タ
L4934 小ワニグチ
マグネ付ストラップ
L9207-10
DM4910 熱電対
DT4911TestLead
DT4912TestLead
L4930 接続ケーブル
L4931renketu
L4931 延長ケーブル
L4932(+9207-10cap)
L4933 コンタクトピン
L4935 ワニ口
L4936 バスバー
2
9243 graber L4937 マグネットアダプ
タ
L4934 小ワニグチ
マグネ付ストラップ
L9207-10
DM4910 熱電対
DT4911TestLead
DT4912TestLead
L4930 接続ケーブル
L4931renketu
L4931 延長ケーブル
L4932(+9207-10cap)
L4933 コンタクトピン
L4935 ワニ口
L4936 バスバー
1*
9243 graber L4937 マグネットアダプ
タ
L4934 小ワニグチ
マグネ付ストラップ
L9207-10
DM4910 熱電対
DT4911TestLead
DT4912TestLead
L4930 接続ケーブル
L4931renketu
L4931 延長ケーブル
L4932(+9207-10cap)
L4933 コンタクトピン
L4935 ワニ口
L4936 バスバー
9243 graber L4937 マグネットアダプ
タ
L4934 小ワニグチ
マグネ付ストラップ
L9207-10
DM4910 熱電対
DT4911TestLead
DT4912TestLead
L4930 接続ケーブル
L4931renketu
L4931 延長ケーブル
L4932(+9207-10cap)
L4933 コンタクトピン
L4935 ワニ口
L4936 バスバー
7
* Refer to p. 1
Model Maximum rated voltage and
maximum rated current
1Model L9788-11* Test Lead Set
with Remote Switch CAT III 600 V/CAT II 600 V, 2 A
2
Model 9804-02 Magnet Adapter
(φ11 mm, standard screw: M6 pan
head screw)
CAT IV 1000 V, 2 A
3Model L9787* Test Lead (1.2 m) CAT III 600 V/CAT II 600 V, 10 A
4Model L9787-91 Breaker Pin CAT III 600 V, 10 A
5Model L9788-10* Test Lead with
Remote Switch (Red) CAT III 600 V/CAT II 600 V, 2 A
6Model L9788-92 Breaker Pin CAT III 600 V, 2 A
7Model L9788-90 Tip Pin CAT III 600 V/CAT II 600 V, 2 A

3
Safety Information
Safety Information
This instrument is designed to conform to IEC 61010 Safety
Standards, and has been thoroughly tested for safety prior to
shipment. However, using the instrument in a way not described in
this manual may negate the provided safety features.
Before using the instrument, be certain to carefully read the following
safety notes:
DANGER
Mishandling during use could result in injury or death,
as well as damage to the instrument. Be certain that
you understand the instructions and precautions in
the manual before use.
WARNING
Protective gear
This instrument measures live lines. To prevent
electric shock, use appropriate protective insulation
and adhere to applicable laws and regulations.
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付録索引

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Safety Information
Notation
In this document, the risk seriousness and the hazard levels are
classied as follows.
DANGER Indicates an imminently hazardous situation that will
result in death or serious injury to the operator.
WARNING Indicates a potentially hazardous situation that may
result in death or serious injury to the operator.
CAUTION
Indicates a potentially hazardous situation that may
result in minor or moderate injury to the operator or
damage to the instrument or malfunction.
Indicates a strong magnetic- eld hazard.
The effects of the magnetic force can cause
abnormal operation of heart pacemakers and/or
medical electronics.
Indicates prohibited actions.
Indicates the action which must be performed.
*Additional information is presented below.

5
Safety Information
Symbols on the instrument
Indicates cautions and
hazards. When the symbol
is printed on the instrument,
refer to a corresponding
topic in the Instruction
Manual.
Indicates that dangerous
voltage may be present at
this terminal.
Indicates a instrument
that has been protected
throughout by double
insulation or reinforced
insulation.
Indicates a grounding
terminal.
Indicates DC (Direct
Current).
Indicates AC
(Alternating Current).
Do not use in distribution
systems with voltage
higher than 660 V AC.
Symbols for various standards
Indicates the Waste Electrical and Electronic Equipment
Directive (WEEE Directive) in EU member states.
Indicates that the product conforms to regulations set out by the
EU Directive.
Indicates that the product incorporates Bluetooth®wireless
technology.
Screen Display
The instrument screen displays the alphanumeric characters as follows.
1 2 3 4 5 6 7 8 9 0
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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付録索引

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Safety Information
Accuracy
We dene measurement tolerances in terms of rdg. (reading) and
dgt. (digit) values, with the following meanings:
rdg.
(reading or displayed value)
The value currently being measured and indicated on the
measuring instrument.
dgt.
(resolution)
The smallest displayable unit on a digital measuring instrument,
i.e., the input value that causes the digital display to show a "1" as
the least-signicant digit.
Trademarks
•Bluetooth®is a registered trademark of Bluetooth SIG, Inc. (USA).
The trademark is used by HIOKI E.E. CORPORATION under
license.
•Android and Google Play are trademarks of Google, Inc.
•IOS is a registered trademark of Cisco in the U.S. and other
countries.
•iPhone, iPad, iPad mini, iPad Pro, and iPod Touch are trademarks
of Apple Inc.
•The App Store is a service mark of Apple Inc.

7
Safety Information
Measurement Categories
To ensure safe operation of measuring instruments, IEC 61010
establishes safety standards for various electrical environments,
categorized as CAT II to CAT IV, and called measurement categories.
DANGER
•Using a measuring instrument in an environment
designated with a higher-numbered category than
that for which the instrument is rated could result in
a severe accident, and must be carefully avoided.
•Never use a measuring instrument that lacks
category labeling in a CAT II to CAT IV measurement
environment. Doing so could result in a serious
accident.
This instrument conforms to the safety requirements for CAT III 600 V
measuring instruments.
CAT II: When directly measuring the electrical outlet receptacles of the
primary electrical circuits in equipment connected to an AC electrical
outlet by a power cord (portable tools, household appliances, etc.)
CAT III: When measuring the primary electrical circuits of heavy equipment
(xed installations) connected directly to the distribution panel, and
feeders from the distribution panel to outlets.
CAT IV: When measuring the circuit from the service drop to the service
entrance, and to the power meter and primary overcurrent
protection device (distribution panel).
T Outlet
CAT II
Internal wiring
Distribution panel
Service entrance
Service drop
CAT IV
Power meter
CAT III
Fixed installation
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Operating Precautions
Operating Precautions
Follow these precautions to ensure safe operation and to obtain the
full benets of the various functions.
DANGER
•For your safe operation, do not connect any test
lead to the primary of the distribution panel.
•Do not short-circuit two wires to be measured by
bringing the test leads into contact with them. Arcs
or such graveaccidents are likely to occur.
•To avoid short circuit or electric shock, do not touch
the metal part of the connecting test lead tip.
•To avoid electric shock, be careful to avoid shorting
live lines with the test leads tip.
•If the test lead or the instrument is damaged, there
is a risk of electric shock. Perform the following
inspection before using them:
•Before using the instrument check that the coating
of the test leads are neither ripped nor torn and that
no metal parts are exposed. Using the instrument
under such conditions could result in electric
shock. Replace the test leads with those specied
by our company.
•Verify that the instrument operates normally to
ensure that no damage occurred during storage
or shipping. If you nd any damage, contact your
authorized Hioki distributor or reseller.

9
Operating Precautions
WARNING
•To avoid electric shock, short circuits and
damage to the instrument, observe the following
precautions:
Check the position of the rotary switch before
taking measurements. Disconnect the test leads
from the measurement object before switching the
rotary switch.
•Do not use the instrument with circuits that exceed
its ratings or specications. Doing so may damage
the instrument, resulting in electric shock.
•Use only the specied test leads. Use of any test
lead not specied by our company does not allow
safe measurements.
•To avoid electrical accidents, remove power from
the circuit before connecting the test leads.
•To avoid electric shock, do not exceed the lower of
the ratings shown on the instrument and test leads.
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Operating Precautions
CAUTION
•The cable is hardened under the 0°C or colder
environment. Do not bend or pull it to avoid tearing its
shield or cutting cable.
•The protection rating for the enclosure of this device
(based on EN60529) is IP40*.
* 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 measuring 1.0 mm
in diameter.
0: The equipment inside the enclosure is not protected against the harmful
effects of water.

11
Operating Precautions
Installing the instrument
WARNING
Installing the instrument in inappropriate locations
may cause a malfunction of instrument or may give
rise to an accident. Avoid the following locations.
•Exposed to direct sunlight or high temperature
•Exposed to corrosive or combustible gases
•Exposed to a strong electromagnetic eld or
electrostatic charge
•Near induction heating systems (such as high-
frequency induction heating systems and IH
cooking equipment)
•Susceptible to vibration
•Exposed to water, oil, chemicals, or solvents
•Exposed to high humidity or condensation
•Exposed to high quantities of dust particles
CAUTION
Do not place the instrument on an unstable table or an
inclined place. Dropping or knocking down the instrument
can cause injury or damage to the instrument.
Precautions when transporting the instrument
During shipment of the instrument, handle it carefully so that it is not
damaged due to a vibration or shock.
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Operating Precautions
Handling the Instrument
DANGER
Persons wearing electronic medical devices such as
apacemaker should not use model 9804-02 Magnet
Adapter. Such persons should avoid even proximity
to model 9804-02, as it may be dangerous. Medical
device operation could be compromised, presenting a
hazard to human life.
CAUTION
To avoid damage to the instrument, protect it from physical
shock when transporting and handling. Be especially
careful to avoid physical shock from dropping.
Test leads
CAUTION
•Removable sleeves are attached to the metal pins
at the end of the test leads. To prevent a short circuit
accident, be sure to use the test leads with the sleeves
attached when performing measurements in the CAT
III measurement category. Remove the sleeves before
starting CAT II measurements. You can use the test
leads with the sleeve removed for primary side of
the circuit breakers turned off. (See “Measurement
Categories” (p. 7))
•If the sleeves are inadvertently removed during
measurement, stop the measurement. (p. 1)

13
1Overview
1.1 Product Overview
This instrument is an insulation ohmmeter that shortens work times
associated with insulation testing. It is not designed for use on
manufacturing lines and should not be used in such applications.
For manufacturing line applications, use the model ST5520
Insulation Tester.
High-speed response
•Considerably improved response time compared to previous models.
•The instrument can be used like models with a meter needle.
Enhanced comparator function
•Can be used similarly to the continuity check with a tester due to judgment
after the start of measurement being extremely short.
•The backlight lights up in red for a FAIL judgment (defective).
Low variation in measured values
•The instrument generates little variation in measured values when used in a
typical measuring environment.
Easy-to-view display
•Backlight source is a white high-intensity LED.
•Wide viewing angle LCD
High-accuracy voltage measurement function
•The instrument incorporates a DC/AC voltmeter with the same accuracy as
a card tester.
•There is no need to switch to a card tester when you need to measure
voltage.
PVΩmeasurement function (Model IR4055)
•Insulation resistance can be measured accurately for solar battery panel.
1 Overview
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14
Names and Functions of Parts
1.2 Names and Functions of Parts
Front
IR4056, IR4057, IR4058 (The gure below is model IR4058)
1065 97 8
1Display
32
(p. 8)
(p. 19, p. 22,
p. 32, p. 38)
4
(p. 8)
Top
1MEASURE key (p. 16) Starts insulation resistance measurement.
2Earth terminal Connects the black test lead.
3Control terminal Controls model L9788-10 Test Lead with
Remote Switch (Red)
4Line terminal Connects the red test lead.
5Rotary switch Selects measurement functions.
6LIGHT key
Turns on and off the light.
70ΩADJ key Performs zero-adjustment for the low
resistance range.
8Live circuit indicator Lights up when voltage remains between
input terminals.

15
Names and Functions of Parts
9
COMP key Sets the comparator’s judgment reference
value.
Bluetooth key Sets the Bluetooth® (p. 49)
(IR4055, IR4058)
10 RELEASE key
Press before measurement to set the instrument
to the 500 V or 1000 V range (to prevent
erroneous application of the test signal).
IR4055
1 2
(Other functions are the same as
IR4056, IR4057, and IR4058.)
1500 V↔1000 V key Switches between 500 V and 1000 V when using
PVΩrange.
2500 V/1000 V
RELEASE key
•Press before measurement to set the instrument
to the 500 V or 1000 V range (to prevent
erroneous application of the test signal).
• Applied voltage is conrmed when PVΩrange
is set.
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Names and Functions of Parts
MEASURE key
MEASURE key
states
Pull*Press the right
portion Release
Description in
this manual Turn on the MEASURE key. Turn off the MEASURE key.
*: Convenient way for performing measurement repeatedly
Power OFF
Rotary switch
state
Description in
this manual
Turn off the rotary
switch.