Page 1
Page 2
Contents
1
2
3
4
5
6
7
Appx.
索引
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
IR4058A961-02
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Contents
3.6 Discharging Function ...................................37
3.7 Voltage Measurement ................................... 38
Negative Voltage Notication Function
(Model IR4055) ......................................................... 39
3.8 Low Resistance Measurement
(Model IR4056, IR4057, IR4058) .................... 40
3.9 PV
3.10 Bluetooth
Measurement Function
Ω
(Model IR4055) ............................................... 42
Installing the Smartphone App GENNECT Cross .....50
Pairing the App ......................................................... 51
Making Measurements with the Bluetooth® Function
®
Communication Function ..........49
.. 52
4 Specications 53
4.1 StandardSpecications ...............................53
4.2 GeneralSpecications .................................54
4.3 Measurement functions ................................ 57
4.4 PV
4.5 ExternalInterfaceSpecications
Measurement (Model IR4055) .............. 63
Ω
(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
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Page 4
Introduction
1
2
3
4
5
6
7
付録索引
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 sufx.
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 specications, contact your authorized Hioki
distributor or reseller. Conrm 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 sufx
“-20”)
□ Model L9788-11 Test Lead Set with
Remote Switch*
(Only for the instruments with sufx “-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
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
DM4910 熱電対
DT4911TestLead
DT4912TestLead
L4930 接続ケーブル
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
L4937 マグネットアダプ
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
DM4910 熱電対
DT4911TestLead
DT4912TestLead
L4930 接続ケーブル
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
Options
The following options are available for the IR4000 series. Contact
your authorized Hioki distributor or reseller when ordering.
*
1
2
*
3
*
5
6
7
* Refer to p. 1
4
Model
Model L9788-11* Test Lead Set
1
with Remote Switch
Model 9804-02 Magnet Adapter
(φ11 mm, standard screw: M6 pan
2
head screw)
Model L9787* Test Lead (1.2 m) CAT III 600 V/CAT II 600 V, 10 A
3
Model L9787-91 Breaker Pin CAT III 600 V, 10 A
4
Model L9788-10* Test Lead with
5
Remote Switch (Red)
Model L9788-92 Breaker Pin CAT III 600 V, 2 A
6
Model L9788-90 Tip Pin CAT III 600 V/CAT II 600 V, 2 A
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Maximum rated voltage and
maximum rated current
CAT III 600 V/CAT II 600 V, 2 A
CAT IV 1000 V, 2 A
CAT III 600 V/CAT II 600 V, 2 A
Page 6
Safety Information
1
2
3
4
5
6
7
付録索引
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.
3
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Safety Information
Notation
In this document, the risk seriousness and the hazard levels are
classied as follows.
DANGER
WARNING
CAUTION
Indicates an imminently hazardous situation that will
result in death or serious injury to the operator.
Indicates a potentially hazardous situation that may
result in death or serious injury to the operator.
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.
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Symbols on the instrument
1
2
3
4
5
6
7
付録索引
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.
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.
Safety Information
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.
Screen Display
The instrument screen displays the alphanumeric characters as follows.
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
1 2 3 4 5 6 7 8 9 0
5
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Safety Information
Accuracy
We dene measurement tolerances in terms of rdg. (reading) and
dgt. (digit) values, with the following meanings:
(reading or displayed value)
rdg.
The value currently being measured and indicated on the
measuring instrument.
(resolution)
The smallest displayable unit on a digital measuring instrument,
dgt.
i.e., the input value that causes the digital display to show a "1" as
the least-signicant 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.
6
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Safety Information
1
2
3
4
5
6
7
付録索引
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).
Distribution panel
Service entrance
Service drop
CAT IV
Power meter
Internal wiring
CAT III
Fixed installation
CAT II
T
Outlet
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Operating Precautions
Operating Precautions
Follow these precautions to ensure safe operation and to obtain the
full benets 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 specied
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.
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Operating Precautions
1
2
3
4
5
6
7
付録索引
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 specications. Doing so may damage
the instrument, resulting in electric shock.
• Use only the specied test leads. Use of any test
lead not specied 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.
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Installing the instrument
1
2
3
4
5
6
7
付録索引
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
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.
Operating Precautions
WARNING
CAUTION
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
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.
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
• 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)
DANGER
CAUTION
CAUTION
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Page 16
1 Overview
1
2
3
4
5
6
7
付録索引
Overview
1
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.
PVΩ measurement function (Model IR4055)
• Insulation resistance can be measured accurately for solar battery panel.
13
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Names and Functions of Parts
1.2 Names and Functions of Parts
Front
IR4056, IR4057, IR4058
(p. 19, p. 22,
p. 32, p. 38)
1
(The gure below is model IR4058)
Display
Top
32
4
(p. 8)
1065 97 8
MEASURE key (p. 16) Starts insulation resistance measurement.
1
Earth terminal Connects the black test lead.
2
Control terminal
3
Line terminal Connects the red test lead.
4
Rotary switch Selects measurement functions.
5
LIGHT key
6
0Ω ADJ key
7
Live circuit indicator
8
Controls model L9788-10 Test Lead with
Remote Switch (Red)
Turns on and off the light.
Performs zero-adjustment for the low
resistance range.
Lights up when voltage remains between
input terminals.
14
(p. 8)
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Names and Functions of Parts
1
2
3
4
5
6
7
付録索引
COMP key
9
Bluetooth key
RELEASE key
10
IR4055
500 V↔1000 V key
1
500 V/1000 V
2
RELEASE key
Sets the comparator’s judgment reference
value.
Sets the Bluetooth
(IR4055, IR4058)
Press before measurement to set the instrument
to the 500 V or 1000 V range (to prevent
erroneous application of the test signal).
1 2
Switches between 500 V and 1000 V when using
PV
range.
Ω
• 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 conrmed when PVΩ range
is set.
®
(p. 49)
(Other functions are the same as
IR4056, IR4057, and IR4058.)
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Names and Functions of Parts
MEASURE key
MEASURE key
states
*
Pull
Description in
this manual
*: Convenient way for performing measurement repeatedly
Turn on the MEASURE key.
Press the right
portion
Power OFF
Rotary switch
state
Release
Turn off the
MEASURE key.
Description in
this manual
16
Turn off the rotary
switch.
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Display
1
2
3
4
5
6
7
付録索引
IR4057, IR4058
Battery indicator (three levels) (p. 27)
Turns on when the voltage measured with the V range is DC.
Turns on when the voltage measured with the V range is AC.
Blinks when the measured value is less than the minimum display
value.
Blinks when the measured value is greater than the maximum
display value.
Turns on when the measured value is retained.
Turns on when the comparator judgment is PASS (good). (p. 29)
Turns on when the comparator judgment is FAIL (defective).
(p. 29)
Blinks when a dangerous voltage exists between the
measurement terminals.
Judgment result buzzer (only when comparator is set) (p. 29)
The auto power save function will activate 30 seconds after this
mark starts turning on. (p. 28)
Turns on when zero adjustment is made during low resistance
measurement. (p. 40)
Names and Functions of Parts
(The gure below is model IR4058)
Bar graph
Measured value
Comparator judgment
reference value or 1-minute
value
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Names and Functions of Parts
Displaying 1-minute values (p. 35)
• Turns on when 1 minute has passed since the start of insulation
resistance measurement.
• Indicates that the resistance value on the bottom of the display
is a 1-minute value (the measured value 1 minute after the start
of measurement).
Turns on when the comparator function is enabled. (p. 29)
Turns on when the instrument is set to the 500 V range or the
1000 V range.
Pressing
measurement.
Displays Bluetooth® function state.
• Bluetooth
• Bluetooth
• Bluetooth
turns off the indicator and enables insulation
®
function ON: Turns on
®
function OFF: Turns off
®
Communicating: Blinks
IR4056
Turns on when the reference value is indicated by the
comparator function.
Measured value
or comparator reference value
(Other functions are the same as
IR4057 and IR4058.)
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IR4055
1
2
3
4
5
6
7
付録索引
Names and Functions of Parts
Measured value
or comparator reference value
(Other functions are the same as
IR4056, IR4057, and IR4058.)
Turns on when PVΩ measurement mode is selected.
Turns on when selecting 500 V range in the PVΩ measurement
mode.
Turns on when selecting 1000 V range in the PVΩ measurement
mode.
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Page 23
Names and Functions of Parts
Model L9788-10 Test Lead with Remote Switch (Red)
CAUTION
The MEASURE key of the instrument is enabled even
when the L9788-10 is connected to an insulation
resistance tester. Note that the testing voltage is output
when the MEASURE key of the instrument is turned ON
while the L9788-10 is connected.
Refer to “Attaching the L9788-92 Breaker Pin” (p. 26)
Sleeve
Enlarged tip view
35
16
1 2 3
Plug
1.8
φ
Light
1
MEASURE key
2
Judgment display
3
20
3.0
φ
Unit: mm
Lights up interlocked with the backlight of the
instrument.
• Starts insulation resistance measurement.
• Lights up in red interlocked with the live wire
warning indicator of the instrument.
Lights up in accordance with the comparator
judgment result.
• PASS: Green
• FAIL: Red
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2 Preparing for Measurement
1
3
4
5
6
7
付録索引
2
Preparing for Measurement
2
CAUTION
Attach the strap securely to the four ttings on the
instrument. If insecurely attached, the instrument may fall
and be damaged when carrying.
Attach the strap.
1
Secure the strap at
4 positions.
Insert the batteries. (p. 22)
2
Connect the test leads to the terminals.
3
Earth terminal
Connect the black
test lead.
Line terminal
Connect the red
test lead.
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Replacing Batteries or Fuse
2.1 Replacing Batteries or Fuse
WARNING
• To avoid electric shock, turn off the MEASURE key,
remove the test leads from the measuring object
and replace the primary battery or fuse.
• After replacing the batteries, reattach the cover and
secure the screw before using the instrument.
• Battery may explode if mistreated. Do not
shortcircuit, recharge, disassemble or dispose of in
re.
• Replace the fuse only with one of the specied type,
characteristics, rated current, and rated voltage. Do
not use fuses other than those specied (especially,
do not use a fuse with higher-rated current) or do
not short circuit and use the fuse holder. Doing so
may damage the instrument and result in bodily
injury.
Fuse type: FF0.5 AH/1000 V (70 172 40.0.500: SIBA
GmbH) (Fast blow, arc-extinguishing material
included, and high breaking capacity)
The fuses can be purchased via authorized Hioki
distributor or reseller. (Fuse replacement not
required for the IR4055)
• To prevent instrument damage or electric shock,
use only the screw for securing the battery cover
in place that are originally installed. If you have lost
a screw or nd that a screw is damaged, please
contact your authorized Hioki distributor or reseller.
22
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Replacing Batteries or Fuse
1
3
4
5
6
7
付録索引
2
CAUTION
Poor performance or damage from battery leakage could
result. Observe the cautions listed below.
• Do no mix old and new batteries, or different types of
batteries.
• Be careful to observe the battery polarity during
installation.
• Do not use batteries after their recommended expiry date.
• Do not leave depleted batteries inside the instrument.
• Replace batteries only with the specied type.
• The operating temperature of the batteries included in
the shipment is −10°C to 45°C (14°F to 113°F). When
using this device outside this temperature range,
use batteries that can support such a low or high
temperature range.
• The battery indicator blinks when the remaining battery capacity
is low. (p. 27)
• Handle and dispose of batteries in accordance with local
regulations.
23
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Page 27
Replacing Batteries or Fuse
OFF
Turn off the rotary switch and
1
remove the test lead from the
instrument.
Batteries
(LR6 ×4)
Check the
polarity.
Battery cover
Fuse
FF0.5 AH/1000 V
(70 172 40.0.500:
SIBA GmbH)
Loosen the fastening screw
2
at the rear of the instrument
and remove the battery cover.
Replace all four batteries or
3
the fuse.
Slide the battery cover back
4
into place and tighten the
screw.
24
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Page 28
Using the Model L9788-10 Test Lead with Remote Switch (Red)
1
3
4
5
6
7
付録索引
2
2.2 Using the Model L9788-10 Test
Lead with Remote Switch (Red)
Pre-measurement inspection
Turn off the rotary
1
switch.
Fully insert the L9788-10 plug into
2
the line terminal of the instrument.
OFF
Short the test lead tips each other.
3
Set the rotary switch to insulation resistance range.
4
Turn on the MEASURE key of the L9788-10.
5
Check the red indicator of the MEASURE key of L9788-10 and display 0
interlocked with the live wire warning indicator of the instrument.
M
Ω
OK
0 M
Ω
6
Press .
Check that the L9788-10 tip lamp
lights up.
NO
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Using the Model L9788-10 Test Lead with Remote Switch (Red)
Replacing the Tip Pin (optional) for Model L9788-10
When the tip pin of model L9788-10 Test Lead with Remote Switch
(Red) is worn out or broken, it can be replaced. The tip pin can be
purchased via authorized Hioki distributor or reseller.
Turn off the rotary switch and
1
OFF
disconnect the L9788-10.
Wrench
(size: 7 mm width)
Model L9788-90 Tip Pin
Remove the tip pin by rotating
2
with a wrench.
Attach the new tip pin to the L9788-
3
10 by rotating with a wrench.
(Tightening torque: 0.3 N·m)
Check the operation.
4
Measure a measuring object of known
values and use after checking that the
resistance is correct.
Attaching the L9788-92 Breaker Pin
Remove the sleeve of the L9788-10 and attach the breaker pin.
Fully insert.
Model L9788-92 Breaker Pin
Removing and attaching the test lead sleeves
Safely store the removed sleeves so as
not to lose them. (p. 12)
Removing the sleeves Attaching the sleeves
Gently hold the bottom of the
sleeves and pull the sleeves off.
Insert the metal pins of the test leads into
the holes of the sleeves, and rmly push
them all the way in.
26
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3 Measurement
1
2
4
5
6
7
付録索引
3
Measurement
3
3.1 Pre-measurement Inspection
Before using the instrument, verify that it operates normally to ensure that no
damage occurred during storage or shipping. If you nd any damage, contact
your authorized Hioki distributor or reseller.
Checking the remaining battery charge
Is the battery level adequate?
Set the rotary switch away
from OFF and conrm the
battery indicator.
Turns on
Checking the test lead
Is the white portion
(insulation layer) inside
the cable exposed?
Not Exposed
Blinks
Exposed
Replace the batteries. (p. 22)
Do not use if damage is present
as you could receive an electric
shock.
Contact your authorized
Hioki distributor or reseller for
replacement.
1. Set the rotary switch to
insulation resistance
range.
2. Short the test lead tips.
3. Is 0 M
Inspection complete
Please read the “Operating Precautions” (p. 8) before use.
displayed when
Ω
the MEASURE key is
turned on?
Displayed
Not
displayed
The following issues may be
occurring:
• The test lead has not been
inserted all the way.
Insert the test lead all the way in.
→
• There is a broken connection in
the test lead.
→ Replace them with those
specified by our company.
27
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Auto Power Save (Power-Saving Function)
3.2 Auto Power Save (Power-Saving Function)
When the rotary switch is not in the OFF position, the instrument changes
to the auto power save state 10 minutes after the last operation or live wire
warning indication.
To avoid battery depletion, turn off the rotary switch after use (the auto power
save consumes a small amount of current).
Canceling the auto power save
Other than
the OFF
position.
Recovering from auto power save state
Turn off the rotary switch and then turn on the power again.
Turn on the instrument while
holding down
.
3.3 Auto Backlight-off (Automatic Light-off Function)
The backlight of the instrument will automatically turn off after approx. 3
minutes has passed since the last operation.
The automatic light-off function can be canceled when working continuously
in a dark location.
Canceling the automatic light-off function
Backlight: OFF
Continuous
short beep
Press for approx. 2 seconds.
28
With the backlight off, press
for approx. 2 seconds
until the instrument beeps
continuously.
Repeat this procedure after turning
off the rotary switch.
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Comparator Function
1
2
4
5
6
7
付録索引
3
3.4 Comparator Function
This function compares the measured value with the preset value and judges
whether the result is PASS (good) or FAIL (defective).
Comparator settings for each range will be saved, even if the rotary switch is
turned off.
See the table on the next page for criteria that can be set.
Indication lights up
PASS (good) judgment FAIL (defective) judgment
LED
display
Backlight:
No change
* When using the model L9788-10 Test Lead with Remote Switch (Red)
Type of measurements that can be judged
Function
Insulation
Resistance
Low resistance
PV
Ω
Voltage Comparator cannot be set.
Lights up in
green*
PASS judgment FAIL judgment
State of
measured
value
Criterion or
higher
Criterion or
lower
Criterion or
higher
Backlight: Lights
up in red
Buzzer Backlight Buzzer
Short beep
Long
beep
Short beep Long beep
Lights up in
red
Lights up in
red*
Long beep
Short beep
29
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Comparator Function
Setting the Comparator
Select a judgment reference from the table below.
1
Range Reference value Unit
0.01 0.02 0.03 0.04 0.05
50 V
125 V
250 V
500 V/PV
1000 V*
500 V
Ω
3
/PVΩ 1000 V
Ω
*1: Factory default setting
*2: Factory default setting when PV
*3: Reference values 0.1 to 0.5 are only for model IR4055.
0.1 0.2 0.3 0.4 0.5 ‒
1
2 3 4 5 ‒
1*
10 ‒ ‒ ‒ ‒ ‒
0.1 0.2 0.3 0.4 0.5 ‒
1
2 3 4 5 ‒
1*
10 20 ‒ ‒ ‒ ‒
0.1 0.2 0.3 0.4 0.5 ‒
1
2 3 4 5 ‒
1*
10 20 30 40 50 ‒
0.1 0.2*
1*
2
1
0.3 0.4 0.5 ‒
2 3 4 5 ‒
10 20 30 40 50 ‒
100 ‒ ‒ ‒ ‒ ‒
0.1 0.2 0.3 0.4*
1 2 3 4 5 ‒
1
20 30 40 50 ‒
10*
2
100 200 300 400 500 ‒
0.1 0.2 0.3 0.4 0.5 0.6
1 2 3 4 5 6
1
10 20*
30 40 50 60
100 200 ‒ ‒ ‒ ‒
function is selected.
Ω
0.5 ‒
M
Ω
Ω
30
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Comparator Function
1
2
4
5
6
7
付録索引
3
Set the rotary switch to the range for which you wish to set
2
the judgement reference.
Range Operation
500 V
1000 V
PV
Ω
or
COMP REF
2
Press
Press to select the applied voltage and press to
release the lock.
4
to release the lock.
3
Blinks
3
4
Press .
[COMP] or [REF] blinks and the
resistance value that will be used as
the judgement reference is displayed.
IR4057, IR4058: COMP
IR4055, IR4056: REF
Press or to select the
judgement reference.
If you do nothing about 2 seconds
after you select the judgment
reference, the comparator will be set,
and [COMP] or [REF] will light up.
Canceling the Comparator
oFF
Press several times to select
[oFF].
If you do nothing for about 2 seconds
after you select, [COMP] or [REF] will go
out, and the comparator function will be
canceled.
31
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Page 35
Insulation Resistance Measurement
3.5 Insulation Resistance Measurement
The instrument is used to measure the insulation resistance to
determine the insulation performance of circuits and equipment.
Before starting a measurement, the voltage to be applied to the
measuring object needs to be selected.
WARNING
Observe the following to avoid electric shock, short
circuit, or damage to the instrument.
• Do not attempt to measure insulation resistance
on alive conductor. Doing so could damage the
instrument or cause an accident that might result
in injury or death. Always turn off power to the
measurement target before starting.
• When measuring insulation resistance, dangerous
voltage is applied to the measurement terminals. To
avoid electric shock, do not touch the test leads.
• Do not touch the measuring object immediately after
measurement. Doing so may cause electric shock
due to a highly charged voltage.
• Discharge the measuring object with the discharge
function of the instrument after a measurement. (p. 37)
• Insulation resistance is the ratio of applied voltage to leakage current.
Displayed value may not stabilize depending on the measuring object,
but it is not a failure of the instrument.
• Press the MEASURE key fully down until a live circuit indicator lights up.
If the button is not pressed down fully, a proper measurement cannot be
made.
• After use, turn off the rotary switch.
• Disconnection of any equipment having a lower withstanding voltage than
the test voltage, or equipment or parts having an unknown withstanding
voltage connected to the circuit to be measured is recommended.
32
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Insulation Resistance Measurement
1
2
4
5
6
7
付録索引
3
Lock Function
This function is used to avoid applying high voltage such as 500 V
or 1000 V to equipment having a lower withstanding voltage. This
function will prevent the test voltage from being output even if the
MEASURE key is pressed while the rotary switch is set to the 500
V or PVΩ range.
1000
Releasing the lock
V,
or
1
or
The screen is locked 1 minute after the last measurement or operation
again.
Turns on
Blinks
Turns off
2
Turns off
Set the rotary switch to the
1
500 V, 1000 V or PVΩ range.
Press .
2
Pressing this key unlocks the
instrument and switches to the
measurement screen.
33
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Insulation Resistance Measurement
Measuring Insulation Resistance
CAUTION
To avoid electric shock, turn off the measuring line
breaker.
Example: When measuring the insulation resistance between the circuit
2
5
7
3
4
5
6
and the ground
Turn off the MEASURE key.
OFF
1
ON
OFF
6
Connect the black test lead to the ground side of the
object being measured.
Connect the red test lead to the measurement object.
If there is any remaining voltage on the measuring object, red and white
blink alternately on the backlight.
Turn on the MEASURE key.
To make continuous measurements, pull up the MEASURE key. (p. 16)
Check the value after the indicator has stabilized.
1
Set the rotary switch to a test voltage
2
of 50 V to 1000 V.
In the 500 V or 1000 V range, press to
release the lock. (p. 33)
3
Source (primary side)
OFF
4
Load (secondary side)
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Insulation Resistance Measurement
1
2
4
5
6
7
付録索引
3
Turn off the MEASURE key with the test leads connected
7
to the measuring object.
The last measured values and are displayed and starts
discharging. (p. 37)
• Do not switch the function to other function or rated voltage when the
measurement is in progress.
• The instrument will return to the locked state when about 1 minute of no
operation elapses during measurement in the 500 V and 1000 V ranges. To
continue measurement, release the lock. (p. 33)
Displaying 1-minute Values (Model IR4057, IR4058)
This function automatically retains the measured value (1-minute
value) 1 minute after the start of measurement (after the MEASURE
key is turned on).
No value is shown if less than 1 minute has elapsed since the start
of measurement.
• Use this function when measuring objects
that include a capacitance component.
• Value is not displayed when the comparator
function is enabled.
Retained measured value
35
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Insulation Resistance Measurement
Voltage Characteristics of Measurement Terminals
1200
1000
800
600
400
200
Voltage generated [V]
100
0
0.05 0.12 5
0 0.1 0.25 0.5 1 10 100 1000
Resistance of measuring object [MΩ]
Rated 1000 V
Rated 500
Rated 250
Rated 125
Rated 50
V
∞
V
V
V
36
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Discharging Function
1
2
4
5
6
7
付録索引
3
3.6 Discharging Function
After measurements are completed, discharge the measuring object.
When objects with capacitance component are measured, a charge
equivalent to the rated measurement voltage remains in the object
that may cause electric shock.
Even when the solar panel is discharged after measurement, a
generated voltage from the solar panel is detected that
be cleared.
may not
OFF
Discharging
Discharged
Turned on
Off
Without removing the test leads
from the measurement object, turn
off the MEASURE key.
The built-in discharge circuit
automatically discharges the item.
In models IR4057 and IR4058, the bar
graph level decreases according to
discharge. However, measuring objects
with smaller capacitance component
discharge quickly and the bar graph level
may not change.
When the discharge is completed,
is turned off.
The time required for discharge depends
on the capacitance value.
37
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Voltage Measurement
3.7 Voltage Measurement
This instrument can measure the AC voltage of commercial power.
The instrument can check to ensure that the measuring object is not
live before measuring insulation resistance.
WARNING
• Never press the MEASURE key while measuring
voltage. Doing so could damage the circuitry or
cause an accident that might result in injury or
death.
• During measuring, do not switchover to other functions.
• For waveforms other than sine waves, some errors may occur.
Example: When measuring the voltage between the circuit and ground
Source
(primary side)
3
Load
(secondary side)
Do not turn on the
MEASURE key.
Earth
2
Line
4
38
1
Always connect the test lead
to the secondary side of the
breaker.
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Voltage Measurement
1
2
4
5
6
7
付録索引
3
Set the rotary switch to V.
1
Connect the black test lead to the ground side of the
2
object being measured.
Connect the red test lead to the line side of the breaker.
3
Check the value after the indicator has stabilized.
4
Negative Voltage Notication Function (Model IR4055)
You can check whether P and N are connected in reverse while
measuring the open voltage of solar battery string.
Set the rotary switch to V
1
while pressing
The [‒] and [V] blinks and [ON] or
1 2
Press to switch between ON and OFF.
2
ON
(Factory setting)
OFF Disabled
If there is no operation for 2 seconds after ON or OFF is selected, the
setting is conrmed, and the screen changes to measurement screen.
When the voltage is −1 V or lower, red and white
of the backlight blinks alternately.
[OFF] is displayed.
.
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Page 43
Low Resistance Measurement (Model IR4056, IR4057, IR4058)
3.8 Low Resistance Measurement (Model IR4056, IR4057, IR4058)
WARNING
Do not measure under a live circuit condition.
CAUTION
If active circuits are connected to the measuring object
circuit in parallel, the impedance and transient current of
the parallel circuit could cause measurement errors.
The comparator function can be used during low resistance
measurement. See “3.4 Comparator Function” (p. 29)
For accurate measurements, be sure to perform zero adjustment
before measuring, to cancel the wire resistance of the test leads.
Zero adjustment can be performed with readings of up to a
maximum of 3
displayed, and zero adjustment will not be possible.
Wire the instrument so that the wiring resistance is less than 3
In the following circumstances, repeat the zero adjustment
procedure:
• After changing test leads
• When the ambient temperature changes by 1°C or more
• After replacing the fuse
. When the reading exceeds 3
Ω
, [Err 1] will be
Ω
40
.
Ω
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Low Resistance Measurement (Model IR4056, IR4057, IR4058)
1
2
4
5
6
7
付録索引
3
Example: Checking continuity of grounding wire
2
ON
3
OFF
4
1
5
ON
7
OFF
8
6
Set the rotary switch to the Ω.
1
Short circuit the tip of the test
2
lead.
Turn on the MEASURE key.
3
Turn off the MEASURE key to
4
retain the measured value.
Press .
5
Do not measure
live wires.
6
Connect the test lead to the measurement object.
6
Turn on the MEASURE key to check the displayed value.
7
Turn off the MEASURE key after use.
8
41
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PVΩ Measurement Function (Model IR4055)
3.9 PVΩ Measurement Function (Model IR4055)
This function allows accurate insulation resistance measurements
between the solar panel and ground without any inuence from
power generation. For measurements between the coupling box
output terminals and ground or between power conditioner and
ground, use the normal insulation resistance range.
See “Appx. 1 Measurement Principles” (p. Appx.1)
“Appx. 3 Insulation Resistance Measurements for Solar Cell
Array” (p. Appx.3)
DANGER
Do not short-circuit two wires to be measured by
bringing the test leads into contact with them. Arcs or
such grave accidents are likely to occur.
WARNING
Observe the following to avoid electric shock,
shortcircuit, or damage to the instrument.
• When measuring insulation resistance, dangerous
voltage is applied to the measurement terminals. To
avoid electric shock, do not touch the test leads.
• Check that the connection of the measurement
terminals has been secured. If the terminal is loose,
the contact resistance will increase, resulting in
overheating, equipment burnout, or re.
• Do not touch the measuring object immediately after
measurement. A highly charged voltage may cause
electric shock.
• Discharge the measuring object with the discharge
function of the instrument after a measurement.
(p. 37)
42
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PVΩ Measurement Function (Model IR4055)
1
2
4
5
6
7
付録索引
3
WARNING
Observe the following to avoid electric shock, short
circuit, or damage to the instrument.
• Turn off any disconnector devices and separate
from the power conditioner before starting the
measurements for the solar battery panel.
• Do not attempt to measure insulation resistance
on alive conductor. Doing so could damage the
instrument or cause an accident that might result
ininjury or death. Always turn off power to the
measurement target before starting.
• Do not touch any metal parts such as connection
box and disconnector devices directly with bare
hands. Doing so may cause electric shocks due to
the voltage of the generator.
• Maximum rated voltage between terminals of the
IR4055 is 1000 V DC/600 V AC. Do not use the
instrument for equipment with rated voltage over
1000 V DC or 600 V AC. Doing so may cause electric
shock or failure.
• Use an insulation resistance range other than PVΩ
to perform measurements by shorting P and N.
• Perform measurements by shorting P and N when
the solar battery panel is not generating power,
such as during the night.
• If the bypass diode of the solar battery panel has
failed, do not perform any insulation resistant
measurement. Doing so may damage the solar
battery panel.
43
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PVΩ Measurement Function (Model IR4055)
• Insulation resistance is the ratio of applied voltage to leakage
current. Displayed value may not stabilize depending on the
measuring object, but it is not a failure of the instrument.
• Press the MEASURE key fully down until a live circuit indicator
turns on. If the button is not pressed down fully, a proper
measurement cannot be made.
• Turn off the rotary switch after use.
• Disconnection when measuring is recommended of any
equipment having a lower withstanding voltage than the test
voltage, or equipment or parts having an unknown withstanding
voltage connected to the circuit to be measured.
• The ground capacitance of the solar battery panel is high,
therefore the measured values may take some time to stabilize.
• The PVΩ measurement function does not comply with
EN61557 requirements. To perform measurements in
conformity with EN61557, select the insulation resistance
range.
• Accurate measurements are not possible when open voltage of
the solar battery string is higher than the test voltage. Use the
PVΩ 500 V range for open voltage less than 500 V and PVΩ
1000 V range for open voltage less than 1000 V.
• If a voltage higher than the test voltage is detected, the buzzer
sounds and measurement is not possible.
• For the PVΩ measurement function, the output voltage is
divided by the 1 MΩ resistor and the resistor connected
between measurement terminals because a 1 MΩ current
limiting resistor is connected to the earth terminal.
Example: When a 10 MΩ resistor is measured, the voltage is
divided by 1 MΩ and 10 MΩ.
44
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PVΩ Measurement Function (Model IR4055)
1
2
4
5
6
7
付録索引
3
The method to measure the insulation resistance between the solar
battery panel and ground without shorting P and N will be explained.
See “Appx. 3 Insulation Resistance Measurements for Solar Cell
Array” (p. Appx.3)
Measurement preparation 1
Turn off the main switch of the connection box to be
1
disconnected from the power conditioner.
Turn off all the disconnector devices of the strings.
2
Disconnect lightning arresters from the measuring circuit.
3
Disconnection is not required for the gure (solar generator facility)
shown below because a lightning arrester is not present at the string
side of the disconnector device.
OFF
String
Measurement preparation 2
OFF
1
2
2
Disconnector devices
(Example: Solar generator facility)
3 4
Lightning
arrester
Check that the MEASURE key is
1
turned off.
If the MEASURE key is on, turn it off.
(p. 16)
Set the rotary switch to PVΩ.
2
Press to set 500 V or 1000 V
3
as the test voltage.
Press to release the lock.
4
OFF
1
Main switch
Connection
box
Power
45
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PVΩ Measurement Function (Model IR4055)
Start Measuring
WARNING
Observe the following to avoid damage to the
measuring object.
• If the insulation has deteriorated between the
terminal P and the ground, do not measure between
the terminal N and the ground.
• Connect the red test lead to the string side of the
disconnector device.
Power conditioner, Main switch
5
(Black)
Ground
terminal
6
P terminal
Disconnector devices
(Red)
String
Connect the black test lead to the ground terminal.
5
Connect the red test lead to the terminal P of the string side.
6
If a voltage is detected between the P and the ground terminals, the
insulation may have deteriorated. When there is a voltage on the
measuring object, the voltage detection function makes the backlight
light in red and white alternately.
N terminal
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PVΩ Measurement Function (Model IR4055)
1
2
4
5
6
7
付録索引
3
Power conditioner, Main switch
(Black)
ON
7
OFF
9
Turn on the MEASURE key.
7
To make continuous measurements, pull up the MEASURE key.
Do not remove any test leads from the terminals until the resistance is
displayed. Doing so results in incorrect measurements.
Check the resistance displayed after 4 seconds.
8
Subsequently, the resistance will be updated every second.
If there is any deteriorated insulation and the resistance is lower than
the reference value, do not measure the terminal N of procedure 10.
Doing so may damage the solar battery panel. Check the reference
insulation resistance with safety regulations.
Turn off the MEASURE key.
9
If the MEASURE key is on, turn it off. (p. 16)
Discharge starts and the icon
even if the discharge is completed because a voltage is generated by
the solar battery.
When measuring terminal P and insulation has not
10
deteriorated, connect the red test lead to the terminal N
of the string side and repeat the procedures 7 to 9.
Ground
terminal
(Red)
String
blinks. The icon may not be cleared
P terminal
Disconnector devices
10
N terminal
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PVΩ Measurement Function (Model IR4055)
After Measurements
After measuring insulation resistance for all the strings,
1
remove the black test lead from the ground terminal.
Reconnect the lightning arrester connection if
2
disconnected.
Turn on all the disconnector devices of the strings.
3
Turn on the main switch of the connection box.
4
1 minute after the last measurement or operation, the
turns on and the 500 V/1000 V RELEASE key blinks. Press the key
to release the lock.
48
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Bluetooth® Communication Function
1
2
4
5
6
7
付録索引
3
3.10 Bluetooth® Communication Function
Models IR4055 and IR4058 support the Bluetooth® (Bluetooth® low
energy).
When the Bluetooth® function is enabled, you can review
measurement data and create measurement reports on mobile
devices (iPhone, iPad, iPad Mini, iPad Pro, iPod Touch, and
Android™ devices). For more information about this functionality,
see the help function in the application software GENNECT Cross.
Install the GENNECT Cross on
1
your mobile device. (p. 50)
Enable the Bluetooth® function
2
on model IR4055 or IR4058.
Launch the GENNECT Cross
3
and pair it with model IR4055
or IR4058. (p. 51)
Select the general
4
measurement.
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Bluetooth® Communication Function
Installing the Smartphone App GENNECT Cross
Search for “GENNECT Cross” on the App Store from your iPhone,
iPad or other Apple device, or on Google Play™ from your Android™
device. Then download and install the GENNECT Cross. You will
need an Apple ID to download the app from the App Store, or a
Google account to download the app from Google Play™. For more
information about how to register an account, contact the store at
which you purchased your device.
• Because model IR4055 and IR4058 emit radio waves, use in a
country or region where they have not been approved may be
subject to nes or other penalties as a violation of applicable
laws or regulations. For more information, see the attached
“Precautions Concerning Use of Equipment That Emits Radio
Waves” or go to our website.
• Model IR4055 and IR4058 availability are limited to certain
countries. For more information, contact your authorized Hioki
distributor or reseller.
• Bluetooth® communications range varies greatly with distance
from obstructions (walls, metal obstruction, etc.) as well as
distance from the oor or ground. To ensure stable measurement,
verify adequate signal strength.
• Although this app is provided free of charge, downloading or use
of the app may incur Internet connection charges. Such charges
are the sole responsibility of the user.
• This app is not guaranteed to operate on all mobile devices.
50
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Pairing the App
1
2
4
5
6
7
付録索引
3
Bluetooth® Communication Function
1
Home>Other
• When the app is launched for the rst
time (before being paired with any
instrument), the connection setup
screen will be displayed.
• While the mobile device is displaying
the connection setup screen, simply
move it close to model IR4055 or
IR4058 to automatically pair it with the
instrument (the app can be paired with
up to 8 instruments).
• Allow about 5 to 30 seconds for the
instrument to pair with the app after
being turned on. If the instrument
fails to pair within 1 minute, relaunch
GENNECT Cross and cycle the
instrument’s power.
• Instruments that have been registered
do not require to be registered again.
2
Instrument
Settings
3
The instrument is
automatically registered.
4
Returns to the
home screen.
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Bluetooth® Communication Function
Making Measurements with the Bluetooth® Function
On the home screen, select the standard measurement function from
the options, standard measurement, logging and waveform display, to
start a measurement. For more information about each function, see
the help function in the GENNECT Cross.
The values displayed by the instrument may be different from the
values displayed by the application software due to communication
delays or differences in the update timing.
Standard measurement
Measured values of multiple channels are saved.
52
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4 Specications
4
1
2
3
5
6
7
付録索引
Specications
4
4.1 Standard Specications
Functions Insulation Resistance measurement:
Live circuit
indicator
Automatic
electric
discharge
Auto power
save
Indicator Indicator: LCD display
DC voltage supply, current detection
Low resistance measurement:
DC current supply, voltage detection
Voltage measurement: Automatic DC/AC detection
measurement:
PV
Ω
DC voltage supply, current detection
AC voltage measurement rectication method:
Mean rectication RMS value indication
Available effective battery voltage indicator:
Built-in battery power indicator
Turns on when voltage is detected between the line
terminal and the earth terminal
Automatically discharges the electric charge still present
in the capacitance of the measuring object after the
insulation resistance measurement.
Maximum capacitive load: 5 μF
The power will go off automatically approx. 10 minutes
after the last operation.
Can be canceled using the power supply activation
options.
Backlight
• Color: white, red
• Light automatic OFF function: 3 min. after last operation
• Turns red when the comparator judgment result is FAIL.
• Operation at erroneous input: Alternates white and red.
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General Specications
4.2 General Specications
Guaranteed accuracy
period
Guaranteed
accuracy period from
adjustment made by
Hioki
Product warranty
period
Operating temperature
and humidity
(Rated operational
conditions)
Operating
environment
Nominal circuit
voltage*
Storage temperature
and humidity
1 year
1 year
3 years
• IR4056, IR4057, IR4058
−25°C to 40°C (−13°F to 104°F),
90% RH or less (no condensation)
40°C to 65°C (104°F to 149°F), at 65°C and
below relative with linear decrease up to 25%
RH
• IR4055
0°C to 40°C (32°F to 104°F),
90% RH or less (no condensation)
40°C to 50°C (104°F to 122°F), at 50°C and
below relative with linear decrease up to 50%
RH
Indoors, Pollution Degree 2,
altitude up to 2000 m (6562 ft.)
600 V AC/DC max.
*: The nominal circuit voltage refers to the nominal
voltage of an electric distribution circuit that
can be measured by the instrument (based on
EN61557).
• IR4056, IR4057, IR4058
−25°C to 65°C (−13°F to 149°F),
90% RH or less (no condensation)
• IR4055
−10°C to 50°C (−13°F to 122°F),
90% RH or less (no condensation)
54
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General Specications
4
1
2
3
5
6
7
付録索引
Degree of protection IP40
Maximum rated
voltage to terminal
Maximum rated
voltage to earth
Dielectric strength 7060 V AC, 50 Hz/60 Hz, between measurement
Power supply Rated supply voltage: 1.5 V DC × 4
Maximum rated power 3 VA
Continuous operating
time (at 23°C, as a
referential)
Drop proof On concrete: 1 m
Fuse (Replacements) FF0.5 AH/1000 V (70 172 40.0.500: SIBA GmbH)
Dimensions (excluding
protrusions)
Mass (including
battery, excluding test
lead)
Accessories Refer to “Verifying Package Contents” (p. 1)
Options Refer to “Options” (p. 2)
600 V AC/DC (Voltage measurement)
600 V AC/1000 V DC (Voltage measurement,
only for IR4055)
600 V AC/DC, Measurement Category III,
Anticipated Transient Overvoltage: 6000 V
terminals and chassis, 1 minute, current
sensitivity 1 mA
LR6 alkaline battery × 4
®
Bluetooth
(Comparator off, backlight off, measured with
measurement terminal open at 500 V range)
Bluetooth
(Comparator off, backlight off, measured with
measurement terminal open at 500 V range)
(Very fast-blow, arc-extinguishing material
included, high breaking capacity)
Approx. 159W × 177H × 53D mm
(6.26″W × 6.97″D × 2.09″D)
• IR4055, IR4056: Approx. 600 g (21.2 oz.)
• IR4057, IR4058: Approx. 640 g (22.6 oz.)
OFF: Approx. 20 hours
®
ON: Approx. 10 hours
55
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General Specications
Standards EN61326 (EMC)
*1: Subclause 4.3 of Part 4 (Interchanging of test leads) is not applicable
when model L9788-10 is used.
*2: Model IR4055 is not applicable.
*3: Model IR4055 only
EN61557-1
EN61557-2
EN61557-4
EN61557-10
JISC1302 (Insulation resistance testers)
*1 *2
*2
*3
56
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4.3 Measurement functions
4
1
2
3
5
6
7
付録索引
Accuracy guarantee for temperature and humidity:
23°C±5°C (73°F±9°F), 90% RH or less
Insulation Resistance Measurement
Rated
measurement
voltage (DC)
Effective maximum
displayed value
Medium displayed
value
1st effective
measuring
range [M
Ω
Accuracy
(Limit deviation
tolerance)
2nd effective
measuring range
]
[M
Ω
Accuracy
(Limit deviation
tolerance)
Other measuring
range [M
Ω
Accuracy
(Limit deviation
tolerance)
50 V 125 V 250 V 500 V 1000 V
100 M
2 M
0.200 to
10.00
]
10.1 to
100.0
]
250 MΩ500 MΩ2000 MΩ4000 M
Ω
5 M
Ω
0.200 to
25.0
±2% rdg. ±2 dgt. (Model IR4055: ±4% rdg.)
25.1 to
250
±5% rdg. (IR4055: ±8% rdg.)
Ω
10 M
0.200 to
50.0
50.1 to
500
0 to 0.199
±2% rdg. ±6 dgt.
Measurement functions
50 MΩ100 M
Ω
0.200 to
500
501 to
2000
Ω
Ω
0.200 to
1000
1010 to
4000
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Measurement functions
Display range 1 M
Maximum
displayed value
Resolution 0.001 MΩ0.001 MΩ0.001 MΩ0.001 MΩ0.001 M
Display range 10 M
Maximum
displayed value
Resolution 0.01 MΩ0.01 MΩ0.01 MΩ0.01 MΩ0.01 M
Display range 100 MΩ100 MΩ100 MΩ100 MΩ100 M
Maximum
displayed value
Resolution 0.1 MΩ0.1 MΩ0.1 MΩ0.1 MΩ0.1 M
Display range ‒ 250 MΩ500 MΩ1000 MΩ1000 M
Range conguration
Maximum
displayed value
Resolution ‒ 1 M
Display range ‒ ‒ ‒ 2000 MΩ4000 M
Maximum
displayed value
Resolution ‒ ‒ ‒ 10 M
1.000 M
10.00 M
100.0 M
1 M
Ω
1.000 MΩ1.000 MΩ1.000 MΩ1.000 M
Ω
10 M
Ω
10.00 MΩ10.00 MΩ10.00 MΩ10.00 M
Ω
100.0 MΩ100.0 MΩ100.0 MΩ100.0 M
Ω
‒ 250 M
‒ ‒ ‒ 2000 M
1 M
Ω
10 M
Ω
500 MΩ1000 MΩ1000 M
Ω
1 M
Ω
1 M
Ω
10 M
Ω
1 M
Ω
Ω
Ω
Ω
Ω
Ω
1 M
10 M
1 M
4000 M
10 M
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
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Insulation Resistance Measurement
4
1
2
3
5
6
7
付録索引
measuring range
Effect of
temperature
)*
(E
3
Effect of humidity
Effect of
magnetic el
Effect of supply
voltage (E2)
Effect of
positioning (E1)
*Effect of temperature (E
other than 18°C to 28°C.
Rated
measurement
voltage (DC)
Possible
number of
measurements
Overload
protection
Display update
interval
(less than -25°C to
0°C, 50°C to 65°C)
(Only for IR4056,
IR4057, IR4058)
±4% rdg.and within
d
±4% rdg.and within
660 V AC (10 sec.), 1200 V DC (10 sec.) (Only for IR4055)
IR4057, IR4058: Within 0.6 sec. (no update during response)
IR4055, IR4056: Within 1.0 sec. (no update during response)
Measurement functions
1st effective
±4% rdg.
(0°C to 50°C)
±8% rdg.
allowance
±2.4% rdg. ‒ ‒
allowance
) is applicable to the operating temperature range
3
50 V 125 V 250 V 500 V 1000 V
2nd effective
measuring range
±8% rdg.
(0°C to 50°C)
±16% rdg.
(less than -25°C to
0°C, 50°C to 65°C)
(Only for IR4056,
IR4057, IR4058)
±8% rdg.and within
allowance
±8% rdg.and within
allowance
Not applicable
1000 times or more
600 V AC (10 sec.)
Other measuring
range
±2% rdg.±6 dgt.
(0°C to 50°C)
±4% rdg.±12 dgt.
(less than -25°C to
0°C, 50°C to 65°C)
(Only for IR4056,
IR4057, IR4058)
±2% rdg.±6 dgt.
±2% rdg.±6 dgt.and
within allowance
660 V AC
(10 sec.)
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Measurement functions
Open-circuit
voltage
Lower limit
resistance
value to be
maintained
rated
measurement
voltage
Rated current 1 mA to 1.2 mA
Short-circuit
current
Measurement terminal voltage characteristic
Response time
Judgment time
1 to 1.2 times of rated measurement voltage
0.05 MΩ0.125 MΩ0.25 M
1.2 mA or less
IR4057, IR4058: Within 0.6 sec.
IR4055, IR4056: Within 1.0 sec. (with resistance load)
IR4057, IR4058: Within 0.3 sec.
IR4055, IR4056: Within 0.8 sec.
(When switching from an open state to 10 times the default
judgment reference value)
0.5 M
Ω
1 M
Ω
Ω
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Measurement functions
4
1
2
3
5
6
7
付録索引
Open-circuit voltage 4.0 V to 6.9 V
Measuring current 200 mA or more (at 6
Effect of temperature*
Effect of supply
2
voltage*
Response time Within 1 sec. (measurement terminal open → short)
Possible number of
measurements
Overload protection 600 V AC (10 sec., by fuse protection)
Zero adjustment range 0
Display update interval Within 1 sec.
Display range
(Auto range)
10
Range conguration
100
1000
*1: Display value before zero adjustment
*2: Display value is applicable after zero adjustment
(when the temperature changes more than 1°C, zero adjustment is necessary)
Low Resistance Measurement
2
(applicable to the operating temperature range other than
±3% rdg.±2 dgt. and within allowance
Maximum
displayed value
Ω
Ω
Ω
10.00
100.0
1000
Ω
Ω
Ω
±3% rdg. ±2 dgt.
°C
to 28°C)
18
200 times or more
to 3
Ω
Ω
Resolution
0 to 0.19
0.01
Ω
0.20
0.1
Ω
1
Ω
or less*1)
Ω
2
Accuracy*
(after zero adjustment)
Ω
: ±3 dgt.
to 10.00
Ω
: ±3% rdg. ± 2 dgt.
±3% rdg. ±2 dgt.
Ω
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Measurement functions
Voltage Measurement
AC/DC automatic
detection range
Effect of temperature
Overload protection
Display update interval
Response time
Input resistance 100 kΩ or more (50 Hz/60 Hz)
Frequency range 50 Hz/60 Hz
Display range
(Auto range)
420 V
(minimum displayed
value: 30.0 V)
AC Voltage Measurement
600 V 750 V 1 V
AC detected at 30 V or greater (50 Hz/60 Hz).
(pulsating currents with an overlapping AC component of
30 V or greater are detected as AC)
Measurement accuracy per 1°C × 0.1
(applicable to the operating temperature range other
750 V AC (10 sec.), 750 V DC (10 sec.)
1200 V DC (10 sec.) (Only for IR4055)
(when input voltage is cycled from 0 V to 600 V)
Range conguration
Maximum
displayed value
420.0 V 0.1 V
18°C to 28
than
Within 1 sec.
Within 1.2 sec.
Resolution Accuracy
°C)
±2.3% rdg. ±8 dgt
(ranges in excess of
600 V are outside the
accuracy guarantee)
Input resistance 100 kΩ or more
Display range
(Auto range)
4.2 V 4.200 V 0.001 V
42 V 42.00 V 0.01 V
420 V 420.0 V 0.1 V
IR4056, IR4057,
IR4058: 600 V
DC Voltage Measurement
IR4055: 1000 V
Range conguration
Maximum
displayed value
IR4056, IR4057,
IR4058: 750 V
IR4055: 1100 V
* Over 1000 V for model IR4055 only
62
Resolution Accuracy
±1.3% rdg. ±4 dgt
(ranges in excess of
are outside the
600 V
*
accuracy guarantee)
1 V
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PVΩ Measurement (Model IR4055)
4
1
2
3
5
6
7
付録索引
4.4 PVΩ Measurement (Model IR4055)
See explanation for 500 V and 1000 V of the insulation resistance
measurement for PV
Measurement voltage (DC) PVΩ 500 V PVΩ 1000 V
Maximum displayed value 2000 M
1st effective measuring
range [M
Accuracy
(Limit deviation tolerance)
2nd effective easuring range
[M
Accuracy
(Limit deviation tolerance)
Other measuring range [MΩ]
Accuracy
(Limit deviation tolerance)
Effect of temperature (E
Effect of humidity Accuracy × 1.0 and within allowance
Effect of magnetic eld Accuracy × 0.5
Impact of positioning (E
Effect of supply voltage (E2)
Effect of superimposing DC
voltage
Possible number of
measurements
Overload protection 660 V AC (10 sec.), 1200 V DC (10 sec.)
Display update interval
(no update during response)
Open voltage* 1 to 1.2 times of measurement voltage
Lower limit resistance value
to be maintained rated
measurement voltage
Rated current 0.025 mA ±20% 0.05 mA ±20%
Short-circuit current 1.2 mA or less
Response time Within 4.0 s (Measurement start → Display)
]
Ω
]
Ω
range conguration.
Ω
PVΩ Measurement
Ω
0.200 to 500 0.200 to 1000
±4% rdg.
501 to 2000 1010 to 4000
±8% rdg.
0 to 0.199
±2% rdg. ±6 dgt.
) Accuracy × 1.0 (applicable to the operating
3
temperature range other than 18°C to 28°C)
) Not applicable
1
Accuracy × 1.0 and within allowance
Within ±10%
1000 times or more
4000 M
Within 1.0 sec.
20 MΩ ±5% 20 MΩ ±5%
Ω
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External Interface Specications (Model IR4055, IR4058)
* For the PVΩ measurement function, the output voltage is divided by the
resistor and the resistor connected between measurement terminals
1 M
Ω
because a 1 M
Example: If a DMM with input impedance 10 M
current limiting resistor is connected to the earth terminal.
Ω
voltage, the voltage is divided by 1 M
is used to measure an open
Ω
and 10 MΩ.
Ω
4.5 External Interface Specications
(Model IR4055, IR4058)
Interface Bluetooth
Antenna power Maximum +0 dBm (1 mW)
Communication distance 5 m (line of sight)
Communication prole GATT (Generic Attribute Prole)
Supported Android
devices
Supported iOS devices
TM
®
4.0LE ( )
TM
4.3 or later
Android
(Bluetooth
iOS 10 or later
(Bluetooth
®
low energy enabled devices)
®
low energy enabled devices)
64
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5 Maintenance and Service
5
1
2
3
4
6
7
付録索引
Maintenance and Service
5
WARNING
Touching any of the high-voltage points inside
the instrument is very dangerous. Customers are
not allowed to modify, disassemble, or repair the
instrument. Doing so may cause re, electric shock,
or injury.
Calibrations
The calibration period varies depending on the status of the
instrument or installation environment. We recommend that the
calibration period be determined inaccordance with the status of the
instrument or installation environment. Please contact your Hioki
distributor to have your instrument periodically calibrated.
Precautions when transporting the instrument
When transporting the instrument, be sure to observe the following
precautions:
• To avoid damage to the instrument, remove the batteries from
the instrument. Moreover, be sure to pack in a double carton.
Damage that occurs during transportation is not covered by the
warranty.
• When sending the instrument for repair, be sure to include details
of the problem.
Disposal
Handle and dispose of the instrument in accordance with local
regulations.
Cleaning
• To clean the instrument, wipe it gently with a soft cloth moistened
with water or mild detergent.
• Wipe the LCD gently with a soft, dry cloth.
• Wipe the dust from metal parts of alligator clips with a soft cloth to
avoid any impact on the measurements.
65
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Troubleshooting
5.1 Troubleshooting
Before Returning for Repair
If damage is suspected, check the "Troubleshooting" section below
before contacting your authorized Hioki distributor or reseller.
Symptom Check Items Remedy and Reference
Unable to perform
measurement.
During insulation
resistance, low
resistance, or PV
measurement, the
live circuit indicator
and the display
blinks in red, and
the buzzer sounds.
Unable to perform
measurement in
500 V, 1000 V or
range.
PV
Ω
Are you setting the rotary
switch while the MEASURE
key turned on?
Is the voltage between the
measuring terminals over
any of the following values
before turning on the
MEASURE key?
50 V to 250 V range:
Approx. 90 V
500 V and PV
ranges: Approx. 500 V
1000 V and PV
ranges: Approx. 1000 V
Does the voltage applied
between the measurement
terminals exceed the
Ω
following values?
Insulation resistance, PV
approx. 20 V
Low resistance: approx. 5 V
Is the function to prevent
the application of voltage
by mistake locked?
500 V
Ω
Ω
1000 V
Turn off the MEASURE key
and then press it again.
Separate the measurement
object from all sources of
power before performing
measurement.
Make save that the
measurement target is
disconnected from a live
circuit. If voltage exists in
:
the measurement target, the
Ω
live circuit indicator blinks.
Release the lock function.
(p. 33)
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Troubleshooting
5
1
2
3
4
6
7
付録索引
Symptom Check Items Remedy and Reference
In the 500 V range,
1000 V range or
range, turning
PV
Ω
on the MEASURE
key enables the
lock function that
has been released.
The MEASURE
key is not working
for the lead with a
switch.
The measured
value is shown
as the maximum
display value.
The batteries run
out immediately.
The power is not
turning on.
The insulation
resistance
measured value
increases over
time.
Does the battery have
sufcient charge?
Is alkaline battery used?
Has 1 minute lapsed after
the last operation?
Is the plug of the lead with
a switch fully inserted?
Is there a broken
connection in a test lead?
Are the test leads securely
connected?
Are you using alkaline
batteries?
Does the battery have
sufcient charge?
Have the batteries been
installed improperly?
This phenomenon
reects the inuence of
the measurement object
capacitance component.
This is not a malfunction or
error.
Replace the batteries with
new alkaline batteries.
(p. 22)
Release the lock function
again. (p. 33)
Fully insert the plug to the
limit without any gaps.
(p. 25)
Check the continuity of the
test lead with a tester.
Check the connection
between the test leads and
the instrument, and check
the connection of the tips of
the test leads.
Replace the batteries with
alkaline batteries.(p. 22)
Replace the batteries.
(p. 22)
Install the batteries in the
proper orientation.(p. 22)
If the measured value
uctuates gradually, wait for
it to stabilize and then use
that value.
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Troubleshooting
Symptom Check Items Remedy and Reference
There is excessive
variation in the
measured value.
A different
measured value
results each
time the same
measurement
object is
measured.
Is a charging circuit located
near the measurement
object?
Does the measurement
object have a large
capacitance component
(capacitor)?
Is there any impact due
to the material of the
measuring object?
Is there any impact due to
the temperature/humidity
characteristics of the
measuring object?
Disconnect the circuit
breaker for any nearby
charging circuits. If this is
not possible, use the lowest
measured value as the
measurement result.
If it is possible to remove
the capacitor, do so.
If not, use the lowest
measured value as the
measurement result.
Allow an adequate amount
of time (about 1 hour to
1 day) to pass after the
rst measurement before
repeating measurement.
The effects of polarity*
increase as the insulation
resistance increases.
Measure the object under
the same temperature
and humidity conditions.
In general, an insulator’s
insulation resistance
value will decrease as
temperature and humidity
increase.
Reference: the insulation
resistance value of some
insulated cables decreases
to 1/4 or less when the
temperature increases
10°C.
1
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Troubleshooting
5
1
2
3
4
6
7
付録索引
Symptom Check Items Remedy and Reference
When the
instrument is
calibrated, the
accuracy of
the insulation
resistance range
falls outside
the device
specications.
Has the supplied or
optional test lead used?
Has the insulation of the
test lead deteriorated?
Use the test leads that
came with the instrument
or its optional test leads
to perform the calibration
procedure. With standard
wiring, characteristics are
affected when the resistance
in the 1000 V range reaches
or exceeds 100 M
Replace the deteriorated
test lead with a new one.
.
Ω
The output
voltage polarity is
reversed.
*1 Polarization: A phenomenon whereby a substance’s positive and negative
electric charges move in opposite directions when an electric eld is
applied to it, causing the center position of the positive and negative
charges to shift.
The reversal is due to
the characteristics of the
insulation ohmmeter.
This does not represent a
malfunction.
69
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Troubleshooting
Error Displays and Remedies
When an error is displayed on the LCD screen, repair is necessary.
Please contact your authorized Hioki distributor or reseller.
Display Description Remedy and Reference
The instrument was
unable to perform
zero adjustment.
(Low resistance
measurement)
The specied fuse has
not been installed.
The settings data has
been corrupted.
The pre-adjustment
data has been
corrupted.
The measurement
circuit is broken
The voltage generation
circuit is broken.
Bluetooth® is broken. Repair is required.
• Verify that there is no broken
connection in the test leads.
• Zero adjustment can be
performed for readings of up
. Ensure that the wiring
to 3
Ω
resistance is 3
(p. 40)
Use only the specied type of
fuse. (p. 22)
Repair is required.
Replace the batteries.
If there is no apparent
improvement, the instrument
needs repair.
or less.
Ω
There is a broken
connection in the
suprotective fuse.
Low battery voltage Replace the batteries. (p. 22)
Replace the indicated fuse.
(p. 22)
70
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Page 74
Appendix
1
2
3
4
5
6
7
Appx.
索引
Appendix
Appx. 1 Measurement Principles
1. Insulation resistance measurement
The measurement object’s insulation resistance Rx is calculated by applying
a voltage V to the object, measuring the leak current I that ows to the object
as a result, and dividing the voltage V by the leak current I.
2. Low resistance measurement (Model IR4056, IR4057, IR4058)
The measurement object’s resistance Rx is calculated by applying a current I
to the measurement object, measuring the voltage V that occurs between the
measurement terminals as a result, and dividing the voltage V by the current I.
measurement (Model IR4055)
3. PV
Ω
The resistance Rx is calculated using the equation (Applied voltage V)/
(Leakage current I) by applying a voltage V to the measuring object, and then
measuring the leakage current I owing through the measuring object and
applied voltage V. (Voltage and current generated from the measuring object
are subtracted.)
Appx.1
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Page 75
Operation Uncertainty
Appx. 2 Operation Uncertainty
The operation uncertainty and the variations of measurement value for the
respective inuence quantity approved by EN/IEC61557 are as follows:
Intrinsic uncertainty/
inuence quantity
Intrinsic
A
uncertainty
E2Supply voltage 4.5 V to 6.8 V ±4% rdg. ±3% rdg. ±2 dgt.
E
Temperature 0°C to 35°C ±4% rdg. ±3% rdg. ±2 dgt.
3
Operation
B
uncertainty
Guaranteed range of operation
Inuencing factor non-applicable for E1 and E4 to E
uncertainty
Operation
range
Reference
condition
1st effective
measurement
Variation
Insulation
resistance
±5% rdg. ±3% rdg. ±2 dgt.
±12% rdg. ±30% rdg.
range
10
Low resistance
0.2
to 2
Ω
Ω
Appx.2
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Page 76
Insulation Resistance Measurements for Solar Cell Array
1
2
3
4
5
6
7
Appx.
索引
Appx. 3 Insulation Resistance
Measurements for Solar Cell
Array
There are two insulation resistance measurements for solar cell arrays.
Characteristics of them are as follows:
Measurement with P-N opened
PVΩ measurement of this manual is explained with this measurement.
As solar cell voltage inuences the test voltage, the measurement may not
be accurate. Incorrect procedure may damage the solar panel. If earth fault is
occurred due to earth leakage as shown in the following gure, current being
generated inuences the insulation resistance meter resulting in inaccurate
measurement with a normal insulation resistance meter. PV
mode of the IR4055 allows accurate measurements without the effect from
power generation.
P
N
PV
Earth
PV
leakage
P
N
Connection box
Earth
Insulation resistance meter
Measurement with P-N shorted
This measurement allows accurate measurements but is also a highly
dangerous method as arc discharge may be generated due to the short
circuit. There is also a re risk depending on the deterioration level of the
solar panel.
PV current
current reading
measurement
Ω
Connection box
Earth
Appx.3
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