IR4051
IR4052
Instruction Manual
IR4053
INSULATION TESTER
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May 2019 Revised edition 8
IR4051A981-08 19-05H
EN
i
Contents
Contents
Introduction ...............................................................1
Verifying Package Contents...................................... 1
Options......................................................................3
Safety Information.....................................................4
Operating Precautions .............................................. 8
Chapter 1 Overview 13
1.1 Product Overview......................................13
1.2 Features ....................................................13
1.3 Names and Functions of Parts .................. 15
1.4 Using a Carrying Case ............................. 20
Chapter 2 Measurement Procedures 21
2.1 Measurement Preparations.......................21
2.2 Pre-measurement inspection .................... 22
2.3 Inspecting the Instrument When Using the
L9788-10 Test Lead with Remote Switch
(Red) .........................................................23
2.4 Configuring the Comparator......................24
2.4.1 Setting the Comparator..................25
2.4.2 Canceling the Comparator .............25
2.5 Insulation Resistance
Measurement ............................................ 27
IR4051A981-08
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Contents
2.5.1 Lock Function ................................ 28
2.5.2 Measuring Insulation Resistance ... 30
2.5.3 Switching the Number of Display
Digits ............................................. 32
2.5.4 Displaying 1-min. Values .............. 34
2.5.5 Voltage Characteristic of Measuring
Terminals ....................................... 35
2.6 Discharging Function ................................ 36
2.7 Voltage Measurement............................... 37
2.7.1 Negative Voltage Detection .......... 39
2.8 Low Resistance Measurement ................. 40
2.9 PVΩ Measurement ................................... 42
2.10 Auto power save (power-saving function) . 50
2.11 Auto-backlight-off ...................................... 50
Chapter 3 Specifications 51
Chapter 4 Maintenance and
Service 63
4.1 Troubleshooting ........................................ 63
4.2 Replacing Batteries or Fuse...................... 68
4.3 Replacing the Pin (Option)........................ 70
4.4 Cleaning.................................................... 70
Appendix A1
1
Introduction
Introduction
Thank you for purchasing the HIOKI Model IR4051, IR4052,
IR4053 Insulation Tester. To obtain maximum performance from
the instrument, please read this manual first, and keep it handy
for future reference.
The “instrument” in this manual means IR4051, IR4052, or
IR4053.
Verifying Package Contents
• When you receive the instrument, inspect it carefully to ensure
that no damage occurred during shipping. If damage is
evident, or if it fails to operate according to the specifications,
contact your authorized Hioki distributor or reseller.
• When transporting the instrument, use the original packing
materials in which it was shipped, and pack in a double carton.
Damage occurring during transportation is not covered by
warranty.
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Verifying Package Contents
IR4051, IR4053
IR4052
Package Contents
Insulation Tester ×1
Name
Model
-10 -11
Version
L9787 Test Lead* ×1 L9788-11 Test Lead Set
C0100 Carrying Case ×1
(Included with the IR4052.)
Instruction manual ×1
Accessories
Neck strap (Included with the IR4051 and IR4053.) ×1
LR6 alkaline battery ×4
with Remote Switch* ×1
* L9787 Test Lead and L9788-11 Test Lead Set with Remote Switch are
all exclusively designed for the HIOKI IR4000 series. Do not use for any
other purpose.
3
Options
9804-02 Magnetic
Adapter
(11 mm Corresponding
standard screw:
M6 Button head screw)
C0100 Carrying Case
Carrying case for the IR4052
*
L9787 Test Lead, L9788-10 Test Lead with Remote Switch (Red) and
L9788-11 Test Lead Set with Remote Switch are all exclusively
designed for the HIOKI IR4000 series. Do not use for any other purpose.
L9788-90 Tip Pin
(Pin length 123 mm
and 65 mm from the tip
has width 2.6 mm.)
L9788-92 Breaker Pin
L9788-11 Test Lead Set
with Remote Switch
L9787-91 Breaker Pin
L9788-10 Test Lead with Remote Switch
(Red) * (1.2 m)
Options
The following options are available for the IR4000 series. Ask
your authorized Hioki distributor or reseller when ordering.
L9787 Test Lead * ( 1.2 m)
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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.
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.
• With regard to the electricity supply, there are risks of
electric shock, heat generation, fire, and arc discharge
due to short circuits. If persons unfamiliar with electricity measuring instrument are to use the instrument,
another person familiar with such instruments must
supervise operations.
• Protective gear
This instrument is measured on a live line. To avoid
electric shock when measuring live lines, wear appropriate protective gear, such as insulated rubber gloves,
boots and a safety helmet.
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Safety Information
Safety Symbols
This manual contains information and warnings essential for
safe operation of the instrument and for maintaining it in safe
operating condition. Before using it, be sure to carefully read the
following safety precautions.
In the manual, the symbol indicates particularly
important information that the user should read before
using the instrument.
The symbol printed on the instrument indicates that
the user should refer to a corresponding topic in the
manual (marked with the symbol) before using the
relevant function.
Indicates that dangerous voltage may be present at this
terminal.
Indicates a double-insulated device.
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Indicates a grounding terminal.
Indicates DC (Direct Current).
Indicates AC (Alternating Current).
DO NOT USE IN DISTRIBUTION SYSTEMS WITH
VOLTAGES HIGHER THAN AC660V.
The following symbols in this manual indicate the relative importance of cautions and warnings.
Indicates that incorrect operation presents an extreme
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a significant
hazard that could result in serious injury or death to the
user.
Indicates that incorrect operation presents a possibility
of injury to the user or damage to the instrument.
Indicates advisory items related to performance or
correct operation of the instrument.
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Safety Information
IR4051
IR4052
IR4053
Symbols for Various Standards
Indicates that the product conforms to regulations set out by
the EU Directive.
WEEE marking:
This symbol indicates that the electrical and electronic
appliance is put on the EU market after August 13, 2005, and
producers of the Member States are required to display it on
the appliance under Article 11.2 of Directive 2002/96/EC
(WEEE).
Other Symbols
Indicates a prohibited action.
Indicates the location of reference information.
(p. )
Indicates that descriptive information is provided below.
*
Indicates a function of the IR4051 Insulation Tester.
Indicates a function of the IR4052 Insulation Tester.
Indicates a function of the IR4053 Insulation Tester.
The screen of this instrument displays characters in the following manner.
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Safety Information
Accuracy
We define 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.
rdg. (reading or displayed value)
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-significant digit.
Measurement categories
This instrument complies with CAT III safety requirements.
To ensure safe operation of measurement instruments, IEC 61010
establishes safety standards for various electrical environments,
categorized as CAT II to CAT IV, and called measurement categories.
Primary electrical circuits in equipment connected to an AC
CAT II:
CAT III:
CAT IV:
Using a measurement
instrument in an
environment designated
with a higher-numbered
category than that for
which the instrument is
rated could result in a
severe accident, and must
be carefully avoided.
Use of a measurement
instrument that is not
CAT-rated in CAT II to CAT IV measurement applications could result in a
severe accident, and must be carefully avoided.
electrical outlet by a power cord (portable tools, household
appliances, etc.)
CAT II covers directly measuring electrical outlet
receptacles.
Primary electrical circuits of heavy equipment (fixed
installations) connected directly to the distribution panel,
and feeders from the distribution panel to outlets.
The circuit from the service drop to the service entrance,
and to the power meter and primary overcurrent protection
device (distribution panel).
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Operating Precautions
Operating Precautions
Follow these precautions to ensure safe operation and to obtain
the full benefits of the various functions.
Preliminary Checks
Before using the instrument for the first time, verify that it operates normally to ensure that no damage occurred during storage
or shipping. If you find any damage, contact your authorized
Hioki distributor or reseller.
To prevent an electric shock accident, confirm that the
white or red portion (insulation layer) inside the cable is
not exposed. If a color inside the cable is exposed, do not
use the cable.
Setting up the Instrument
Operating temperature and humidity (p.52)
Accuracy guarantee for temperature and humidity (p.54)
Avoid the following locations that could cause an accident or damage to
the instrument.
Exposed to direct
sunlight
Exposed to high
temperature
Exposed to water,
oil, other chemicals,
or solvents
Exposed to high
humidity or
condensation
Exposed to high
levels of particulate
dust
Subject to vibration
In the presence of
corrosive or explosive
gases
Exposed to strong
electromagnetic fields
Near electromagnetic
radiators
Near induction heating
systems
(e.g., high-frequency
induction heating
systems and IH cooking
utensils)
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Operating Precautions
• The maximum rated voltage between input terminals
and ground is 600 V DC/AC (CAT III). Attempting to
measure voltages exceeding 600 V DC/AC with
respect to ground could damage the instrument and
result in personal injury.
• 1000 V or 600 V may be labeled depending on the
supplied test leads, but this is the rating of the test lead
and not the rating performance of this instrument.
Please refer to the Specifications for the rating
performance of this instrument.
• Before attaching to or removing the test lead from the
instrument, please remove the Test Lead from the
tested objected and turn the rotary selector to OFF.
• Test leads should only be connected to the secondary
side of a breaker, so the breaker can prevent an
accident if a short circuit occurs. Connections should
never be made to the primary side of a breaker,
because unrestricted current flow could cause a
serious accident if a short circuit occurs.
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Operating Precautions
• Please only use batteries for electrical supply. Any
other electrical supply may damage the instrument and
tested object and cause electric shock.
• Persons wearing electronic medical devices such as a
pacemaker should not use the 9804-02 Magnetic
Adapter with magnet (option). Such persons should
avoid even proximity to the 9804-02, as it may be
dangerous. Medical device operation could be
compromised, presenting a hazard to human life.
• Do not bring the 9804-02 near magnetic media such as
floppy disks, magnetic cards, pre-paid cards, or magnetized tickets. Doing so may corrupt and may render
them unusable. Furthermore, if the 9804-02 is brought
near precision electronic equipment such as computers, TV screens, or electronic wrist watches, they may
fail.
• 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
• This instrument is designed for use indoors. It can be
operated at temperatures between -25°C and 65°C (for
IR4053, between 0°C and 50°C) without degrading safety.
• For safety reasons, when taking measurements, only use the
L9787, L9788-11 or optional test lead provided with the instrument.
• To avoid breaking the test lead, do not bend or pull them.
• To avoid damage to the instrument, protect it from physical
shock when transporting and handling. Be especially careful
to avoid physical shock from dropping.
• Do not bring the tips of test leads into contact with the control
terminal that is used to connect a test lead with a remote
control switch. Doing so may damage the instrument.
• Do not slant the instrument or place it on top of an uneven
surface. Dropping or knocking down the device can cause
injury or damage to the instrument.
• If the protective functions of the instrument are damaged, either
remove it from service or mark it clearly so that others do not
use it inadvertently.
• To avoid damaging the cables, unplug it by grasping the connector, not the cable.
• Although this instrument is dust resistant, it is not completely
dust- or waterproof. To prevent possible damage, avoid using
in dusty or wet environments.
• 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. The equipment inside the enclosure is protected
against entry by solid foreign objects larger than 1.0 mm in diameter.
0: The equipment inside the enclosure is not protected against the harmful
effects of water.
The battery indicator flashes when the remaining
battery capacity is low. In this case, measurement
is not possible. Replace the batteries. (p.68)
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Operating Precautions
13
1.1 Product Overview
Overview Chapter 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
ST5520 Insulation Tester.
1.2 Features
High-speed response
Since the instrument delivers dramatically improved
response speeds compared to previous models, it can be
used as a pointer-type device.
Enhanced comparator function
Since the process from the start of measurement to a
PASS/FAIL judgment is extremely fast, the instrument is
suitable for tester continuity check use. The display will turn
red when a FAIL judgment results.
Low variation in measured values
The instrument generates little variation in measured
values when used in a typical measuring environment.
Easy-to-view display
The instrument uses an LCD with a wide viewing angle and
a backlight driven by a high-brightness white LED.
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1.2 Features
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IR4052
IR4053
High-accuracy voltage measurement function
Since 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.
User-selectable number of display digits
The instrument’s number of display digits can be changed.
PVΩ measurement function
Ω measurement allows accurate insulation resis-
The PV
tance measurements of a solar panel.
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1.3 Names and Functions of Parts
“2. Measurement
Procedures”
(p.23)
Front Panel
*This figure is model
EARTH terminal
Connect the black
test lead.
Measure key
Press to measure
insulation resistance.
Rotary selector
Select measurement
functions.
LIGHT key
Press this key to turn on and
off the light.
0Ω ADJ/ MΩ DISPLAY key
• Press this key to perform zeroadjustment for the low resistance range.
• Press this key to change the
number of display digits for the
insulation resistance range.
IR4052
RELEASE key
Press this key before
measurement to set the
instrument to the 500 V or
1000 V range (to prevent
erroneous application of
the test signal).
COMP key
Press this key to set the comparator’s judgment reference value.
Live circuit indicator
Lights up when voltage remains
between input terminals
LINE terminal
Connect the red test
lead.
IR4051 IR4052
Terminals (on top)
Terminals for controlling Model L9788-10.
(p.23)
Display
1.3 Names and Functions of Parts
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Display
Bar graph
Measured
value
Comparator judgment reference value
or 1-minute value
IR4052
1.3 Names and Functions of Parts
Indicates the remaining battery life as one of three
levels. The battery mark outline will flash when the
remaining battery life reaches 0, at which point the
instrument will no longer perform measurement.
Turns on when the voltage measured with the V
range is DC.
Turns on when the voltage measured with the V
range is AC.
Flashes when the measured value is less than the
minimum display value.
Flashes when the measured value is greater than the
maximum display value.
Lights up when the measured value is held.
Turns on when the comparator judgment is PASS
(good).
See: “2.4.1 Setting the Comparator” (p.25)
Turns on when the comparator judgment is FAIL
(defective).
See: “2.4.1 Setting the Comparator” (p.25)
Flashes when a dangerous voltage exists between
the measurement terminals.
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1.3 Names and Functions of Parts
Measured value
or Comparator
reference value
Display
IR4051
IR4052
When the comparator is enabled, the buzzer will
sound when the judgment result (PASS or FAIL) for
which this mark is lit up is encountered.
The auto power save function will activate 30
seconds after this mark starts flashing.
See: “2.10 Auto power save (power-saving function)”
(p.50)
Lights up when zero adjustment is made during low
resistance measurement.
See: “2.8 Low Resistance Measurement” (p.40)
Indicates the number of display digits.
See: “2.5.3 Switching the Number of Display Digits”
(p.32)
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).
See: “2.5.4 Displaying 1-min. Values” (p.34)
Lights up when the comparator function is enabled.
See: “2.4 Configuring the Comparator” (p.24)
Turns on when the instrument is set to the 500 V
range or the 1000 V range. Pressing turns off
the indicator and enables insulation measurement.
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Lights up when the criterion for the comparator
function is indicated.
For more information about other display elements,
see (p.16).
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1.3 Names and Functions of Parts
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Front Panel
RELEASE key
• Press this key before measurement after any of 500 V
or 1000 V ranges is used (to
prevent from misuse).
• When PVΩ range is set, the
voltage to be applied will be
determined.
500V Ω 1000V key
PVΩ range is used to switch
between 500V and 1000V.
Other functions are same with the
ones for IR4051 and IR4052.
IR4053
A measured
value or a
comparator
reference
IR4053
Display
IR4052
Lit when PVΩ measurement mode is selected.
Lit when 500 V range is selected in PVΩ measurement mode.
See display of (p.16) for other indications.
Lit when 1000V range is selected in PVΩ measurement mode.
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1.3 Names and Functions of Parts
Judgment indicator
Indicates the comparator judgment result by
turning green for PASS
and red for FAIL.
Sleeve
Plug
L9788-10 Test Lead with Remote Switch (Red)
MEASURE key
Press to measure
insulation resistance.
The MEASURE key is
connected with the Live circuit indicator and will light up as red.
Light
Is linked to the instrument’s backlight.
φ
1.8
φ
3.0
35
Enlarged view of pin
16
Unit: mm
First take out the sleeve from the L9788-10, and then install
the Breaker pin (L9788-92).
Plug it all the way to the end.
The Insulation Resistance Tester’s MEASURE key will still be
available even when this test lead is connected to the Insulation
Resistance Tester. When connected to the Insulation Resistance
Tester, take note that a test voltage will be discharged even
when the MEASURE key of the Tester is pressed.
L9788-92 Breaker Pin Connection
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1.4 Using a Carrying Case
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IR4052
Undo the snap fastener on OPEN
mark side. Lift the cover and pivot it
to the side and under the case itself
and redo the snap fastener on the
side of the cover.
1.
Undo the snap fastener for the strap
on the left side of the case.
2.
Undo the snap fastener for the strap
on the right side of the case and
redo it as shown in the right figure
1.
2.
Instruction
manual
Alligator clip
PocketPocket
Sleeves
IR4052
1.4 Using a Carrying Case
Fasten the strap as shown below. You can use the instrument
hanging around your neck.
Carrying case inside structure
• Removable sleeves are attached to the metal pins at the ends
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 from the test leads when performing measurements in the CAT II measurement category. The instrument
can be used with the sleeves removed when measuring the
secondary side of a circuit breaker that is off.
For details on measurement categories, see “Measurement
categories” (p.7) in the instruction manual.
• When performing measurements with the sleeves attached,
be careful to avoid damaging the sleeves. If the sleeves are
inadvertently removed during measurement, be especially
careful in handling the test leads to avoid electric shock.
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2.1 Measurement Preparations
Pass the ring on both ends of the supplied strap through
each of the four holes in the instrument.
Attaching the strap
IR4051 IR4053
Slightly extend each of the four double-loop split rings and pass the ring
through a lug-hole on the instrument.
or
Fully insert the test lead to the test pin
or alligator clip.
Measurement
Procedures Chapter 2
1
Attach the strap securely to the four fittings on the instrument. If
insecurely attached, the instrument may fall and be damaged
when carrying.
2.1 Measurement Preparations
1.
Attach the strap.
2.
Insert the batteries. (p.68)
3.
Connect the test lead (connect the black test lead to the
EARTH terminal, and the red test lead to the LINE terminal)
4.
Attach each test pin or alligator clip to a lead.
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