INSULATION TESTER Series

INSULATIONTESTERS2Digital
DROP PROOF

5 ranges
Rated output voltage (DC)
Effective maximum indicated value

50 V / 100 MΩ
125 V / 250 MΩ
250 V / 500 MΩ

Built tough to withstanda 1-meter
drop onto a concrete floor

500 V / 2000 MΩ
1000 V / 4000 MΩ

Manage measurement data using Bluetooth® communication (IR4057-50 KIT)
Transport to the Excel® file

Transport to GENNECT Cross
Recordingmeasured values
on the photograph*It will besupported by the2021 upgrade.

Record it at tap point

Learn MoreCloudGENNECT
Cross

Open an Excel ® file and select a cell.
The measured value being held on theinstrument’s display will be transferred to thecomputer and entered into the selected cell.

2 3PDF Reports

151050100 500

JPG Image data

1000MCOMP

CSV Measurement data
Mail

0.5PASSM

Display themeasurement numberfor prevent wrong
recordGENNECT Cross, a free app designed specifically for use with Hioki measuring instruments, lets
you check and manage measurement results and create reports. The software provides a rangeof functionality that helps manage data in the field, including photographing measurement sites,
placing measurement results on photographs, and saving handwritten memos.

Identify PASS / FAIL using
light and soundSignificantly improve testing speed
using test lead with remote switch

10 0.1

Learn More

WIRELESS ADAPTER
Z3210
Attach to enable
Bluetooth® wirelesstechnology

Add comments

Convenient for inspections

Low resistance measurement*1

4Perform EV and HEV continuity checks as well as
resistance measurement of protective conductors infacility electrical equipment as defined by IEC 60364.

PASS

AC/DC voltage measurement

FAIL
1 LED light shines a spotlight on the target
2 Red light warns of live voltage detection
3 Measurement start switch
4 Identify pass/fail decisions with red or green light
TEST LEAD SET WITH REMOTE SWITCH L9788-11 (Option)*Standard with the IR4056-21, Not CE Marked

FAIL

RED light

Automatically detect AC or DC for testing. Use as atester thanks to DC voltage measurement functionality.

Continuous tone

Compare measured values to pre-set reference
values to generate a pass or fail decision withthe Comparator function.

One-touch Start and Stop
Single test

Continuous test

Measurement voltage is applied
while MEASURE key is pressed

Lift and lock the MEASURE key
to apply a continuous stream ofvoltage

PV Ω dedicated function*2

Measurement is not affected even when the PV system
is online.
*1 Excludes IR4053*2 IR4053 Only

Prevent Accidental High Voltage Generation
Flashing light

Release lock

Under [500V], [1000V], or [PVΩ] settings, the RELEASE button will blink.
Press to unlock the release of high voltages as an extra safety meaure.

3*Excludes IR4056-21

Lineup

Product warranty for 3 years
Accuracy guaranteed for 1 year

Measurement typeStandardHigh-speed

PVHigh-voltage

ModelIR4056-20
IR4056-21

IR4057-50 KIT(Bundled with Z3210)

IR4053-10

IR34555555Appearance

Number of ranges

Testing voltage (DC) /Effective maximum
indicated value

1st effective
measuring range

50 V /100 MΩ
125 V /250 MΩ
250 V /500 MΩ
500 V /2000 MΩ
1000 V /4000 MΩ

250 V /500 GΩ
500 V /1.00 TΩ
1000 V /2.00 TΩ
2500 V /5.00 TΩ
5000 V /10.0 TΩ

0.200 to 10.00 MΩ (50 V)
0.200 to 25.0 MΩ (125 V)
0.200 to 50.0 MΩ (250 V)
0.200 to 500 MΩ (500 V)
0.200 to 1000 MΩ (1000 V)0.00 to 500 GΩ (250 V)
0.00 to 1.00 TΩ (500 V)
0.00 to 2.00 TΩ (1000 V)
0.00 to 5.00 TΩ (2500 V)
0.00 to 10.0 TΩ (5000 V)

PV Ω measurement

N/A

N/A



N/A

Leakage current

N/A

N/A

N/A

1.00 nA to 1.20 mA

DC voltage

600 V

600 V

1000 V

1.00 kVAC voltage

600 V

600 V

600 V

750 V

Low resistance measurement



N/A

N/A

Displaying 1-min. values

N/A



N/A

N/A

Comparator decision
response time

0.8 second

0.3 second

0.8 second (PV : 4 s)

N/AAUTO power save

AUTO range







Data hold

MANUALMANUALMANUALMANUAL®

Bluetooth communication

N/A (With Z3210)

N/A

N/A

Bar graph

N/A



N/A



Backlight









Safety standard
category

CAT III 600 V

CAT III 600 V

CAT III 600 V

CAT IV 600 V
CAT III 1000 VCE

(IR4056-20)



Dustproof and waterproof

IP40

IP40

IP40

IP40

Drop proof







N/A

Power supply

LR03 × 4alkaline

LR03 × 4alkaline

LR03 × 4alkaline

LR03 × 6alkaline

Dimensions(W×H×D)

159 × 177 × 53 mm
6.26 × 6.97 × 2.09 in

159 × 177 × 53 mm
6.26 × 6.97 × 2.09 in

159 × 177 × 53 mm
6.26 × 6.97 × 2.09 in

260 × 250.6 × 119.5 mm
10.24 × 9.87 × 4.70 in

600 g (21.2 oz)

640 g (22.6 oz)

600 g (21.2 oz)

2.8 kg (98.8 oz)

Mass

4

* IR4056-20 only

INSULATION TESTER IR4056-20, IR4056-21

Product warranty for 3 years
Accuracy guaranteed for 1 year

5 rangesWith• TEST LEAD L9787• Neck strap• LR6 alkaline battery ×4• Instruction manualWith• TEST LEAD SET WITHREMOTE SWITCH L9788-11• Neck strap• LR6 alkaline battery ×4• Instruction manual

IR4056-20

IR4056-21 Not CE marked

Comparator decision response time : 0.8 s
CAT III 600 V

INSULATION TESTER IR4057-50 KIT

L4930
L4938
With• CONNECTION CABLE L4930• ALLIGATOR CLIP SET L4935• WIRELESS ADAPTER Z3210• TEST PIN SET L4938• Neck strap• LR6 alkaline battery ×4• Instruction manual

Product warranty for 3 years
Accuracy guaranteed for 1 year

5 ranges

L4935

IR4057-50 KIT

Comparator decision response time : 0.3 s

WIRELESS ADAPTERZ3210
Attach to enableBluetooth®
wireless technology

Bundled with the wireless adapter Z3210

Digital bar graph
CAT III 600 V

Please see www.hioki.com
for list of supported regions.

INSULATION TESTER (For Photovoltaic Generation Systems) IR4053-10

Product warranty for 3 years
Accuracy guaranteed for 1 year

5 ranges
Comparator decision response time : 0.8 sWith• TEST LEAD L9787• Neck strap• LR6 alkaline battery ×4• Instruction manual

Comparator decision response time (PV) : 4 s
CAT III 600 VIR4053-10
ModelIR4056, 57-50 KIT

Measurement parametersTesting voltage (DC)
Effective maximum indicated value (MΩ)
 1st effective measuring range (MΩ)
2nd effective measuring range (MΩ)
Testing voltage (DC)
Effective maximum indicated value (MΩ)
 1st effective measuring range (MΩ)
2nd effective measuring range (MΩ)
 4.200 V/42.00 V/420.0 V/1000 V
N / A 4.200 V/42.00 V/420.0 V/600 V
 420.0 V *2/600 V



N / A 10.00 Ω/100.0 Ω/1000 Ω

Insulation
resistancePV Ω
measurement

N/ADC Voltage
AC Voltage
Low resistancemeasurement

IR4053

N/A50 V
125 V
1002500.200 to 10.000.200 to 25.0
10.1 to 100.0
25.1 to 250
500 V
2000
0.200 to 500
501 to 2000

Other

Operating temperature

IR4056, 57-50: -25℃ to 65℃, 90% rh or less (non-condensating)IR4053: 0℃ to 50℃, 90% rh or less (non-condensating)Storage temperature

IR4056, 57-50: -25℃ to 65℃, 90% rh or less (non-condensating)IR4053: -10 ℃ to 50℃, 90% rh or less (non-condensating)

Dustproof and waterproof

IP40

Standards

EN61326 (EMC)
EN61557-1/-2/-4*3/-10

Power supply
LR6 alkaline battery ×4
Continuous operating time 20 hours
Dimensions ( W × H × D ) 159 × 177 × 53 mm (6.26 × 6.97 × 2.09 inch)
Mass

IR4056, 53: 600 g (21.2 oz)
IR4057-50: 640 g (22.6 oz)

250 V
500
0.200 to 50.0
50.1 to 500

500 V
2000
0.200 to 500
501 to 2000
1000 V4000
0.200 to 1000
1010 to 4000

1000 V4000
0.200 to 1000
1010 to 4000

Basic accuracy±2% rdg ±2 dgt±5% rdg±4% rdg±8% rdg±1.3% rdg ±4 dgt *1±1.3% rdg ±4 dgt *1±2.3% rdg ±8 dgt *1±3% rdg ±2 dgt

Order codeIR4056-20*1 Ranges in excess of 600 V/1000 V are

Order code

IR4056-21*2 Minimum indicated value: 30.0 V*3 Subclause 4.3 of Part 4

Order code

IR4057-50 KIT

Order code

IR4053-10

outside the accuracy guarantee(interchanging of test leads) is not applicablewhen L9788-10 is used

5

HIGH VOLTAGE INSULATION TESTER IR3455

Product warranty for 3 years
Accuracy guaranteed for 1 year

5 ranges
Bar graph
CAT IV 600 V, CAT III 1000 V
Measurement parameters

Order code

Accessories

IR34559750, 9751

Other• TEST LEAD 9750 -01 (Red), -02 (Black), -03 (Blue) (3m) (×1 ea.)• ALLIGATOR CLIP 9751 -01 (Red), -02 (Black), -03 (Blue) (×1 ea.)
• Instruction manual• LR6 alkaline battery ×6• USB cable• CD-R (Data Analysis Software)*1 Up to [Test voltage (setting value)/Resistance measurable at 100 nA]*2 When the USB terminal is covered with the shutter *3 Options

Insulation
resistance

250 V
Testing voltage 500 V
1 kV(DC): measuring range 2.5 kV
5 kV

0.00 MΩ to 500 GΩ
0.00 MΩ to 1.00 TΩ
0.00 MΩ to 2.00 TΩ
0.00 MΩ to 5.00 TΩ
0.00 MΩ to 10.0 TΩMeasurement
current

1 mA (Test voltage 250 V to 1.00 kV)
0.5 mA (Test voltage 1.10 kV to 2.50 kV)
0.25 mA (Test voltage 2.60 kV to 5.00 kV)

Short-circuit current
Accuracy

2 mA or less
±5% rdg ±5 dgt.*1Leakage current

10 nA/100 nA/1000 nA/10 μA/100 μA/1 mA
Guaranteed accuracy range: 1.00 nA to 1.20 mA
Basic accuracy: ±2.5% rdg ± 5 dgt.

DC Voltage±50 V to ±1.00 kV
Basic accuracy: ±5% rdg ±5 dgt.

AC Voltage

50 V to 750 V
Basic accuracy: ±5% rdg ±5 dgt.

Temperature-10.0℃ to 70.0℃
Basic accuracy: ±1.0℃

Operating temperature
Storage temperature
Dustproof and waterproof
Standards-10℃ to 40℃, 80% rh or less (non-condensating)-10℃ to 50℃, 90% rh or less (non-condensating)
IP40 (EN60529)*2
EN61010 (safety) , EN61326 (EMC)

Power supply
Continuous operating timeLR6 (AA) alkaline battery ×6: 5 hours
BATTERY PACK 9459 *3: 9 hours
AC ADAPTER 9418-15*3

Dimensions ( W × H × D )Mass260 × 250.6 × 119.5 mm (10.24 × 9.87 × 4.70 in)
2.8 kg (98.8 oz)

Function introduction HIGH VOLTAGE INSULATION TESTER IR3455
STEP 5.0 kV
step voltage test

PI: Polarization Index
DAR: Dielectric Absorption Ratio
Measurement
completed5kV

Step5

4kV

Measurement
time

Step4

3kV

Step3

2kV
1kV

Data Memory
Function

Step2Resistance value

Step1
1 min.

2 min.

3 min.

4 min.

5 min.

Voltage application time for each step:
30 s/1/2/5 m.

In this type of test, the voltage is graduallyraised and the insulation resistance andleakage current change is measured.
Two different step settings are available:
500 V 1 kV 1.5 kV 2 kV 2.5 kVand 1 kV 2 kV 3 kV 4 kV 5 kV.

PI value display
Measurement
timeThe IR3455 provides a manual storage function
for 100 data and a logging function for 10 data (360times). Date and time are also stored, reducing
the need for handwritten notes.
Install the included software on your computer andconnect via USB to transfer the data stored in theinternal memory of the IR3455 to your computer.

Resistance value

DAR value display
The PI and DAR values which are usedas an evaluation standard for insulation
are automatically calculated.

Function introduction INSULATION TESTER (For Photovoltaic Generation Systems) IR4053-10
Measurement not affectedby generating PV

Accurate and safe measurement
without creating shorts
Short-circuit
switchBuilt-in PV
dedicatedfunction

The IR4053, which was designed for PV, canaccurately measure insulation resistance without
being affected by the generating PV.

Normally, to accurately measure theinsulation resistance of a generating PV,
one needs to short the measured circuit.
That's not necessary with the IR4053.

6Analog Meters

Single range
IR4016-20
IR4017-20
IR4018-20

DROP PROOF

3 range3490

Built tough to withstanda 1-meter
drop onto a concrete floor

See better in the dark

Significantly improve testing speed using test lead with remote switch
REMOTE CONTROL SWITCH

L9788-11 (Option)• Start and stop the test at the touch of a button• Illuminate the test location with a bright white LED• Work safely knowing that when the RED is lit, live wires,high voltage or electrical discharge is present

Bright LED

Check for Live Circuits

The LIVE CIRCUIT LED will light up in red wheneverthe voltage exceeds 20 V AC between the LINE andEARTH terminals, and when at least 20 V DC is still
remaining during the auto discharge.

One-touch Start and Stop
Single test

Continuous test

Measurement voltage is applied while
MEASURE key is pressed

Lift and lock the MEASURE key to apply acontinuous stream of voltage

Flip the Cover
Quick andeasy storage
without
disconnecting
the leads

Check the Battery Status
BATT : Hi

BATT : Lo

BATT : Dead7

LineupProduct warranty for 3 years
Accuracy guaranteed for 1 year

IR4016-20

1RangeIR4017-20Measurement parameters

IR4018-20

Testing voltage
(DC)

500 V

Effective maximum
indicated value

100 MΩ

1st effective
measuring range

0.1 MΩ to 50 MΩ

2nd effective
measuring range

0.01 MΩ to 0.1 MΩ or less
50 MΩ or more to 100 MΩ

Testing voltage
(DC)

500 V

Effective maximum
indicated value

1000 MΩ

1st effective
measuring range

1 MΩ to 500 MΩ

2st effective
measuring range

0.5 MΩ to 1 MΩ or less
500 MΩ or more to 1000 MΩ

Testing voltage(DC)1000 V

Effective maximum
indicated value

2000 MΩ

1st effective
measuring range

2 MΩ to 1000 MΩ

2nd effective
measuring range

1 MΩ to 2 MΩ or less1000 MΩ or more to 2000 MΩ

Testing voltage(DC)

3Ranges

250 V

500 V

1000 V

Effective maximum
indicated value

100 MΩ

4000 MΩ

1st effective
measuring range

0.05 MΩ to 50 MΩ

2 MΩ to 1000 MΩ

2nd effective
measuring range

0.01 MΩ to 0.05 MΩ or less
50 MΩ to 100 MΩ

0.5 MΩ to 2 MΩ1000 MΩ to 4000 MΩ

3490±5% of indicated value (1st effective measuring range)±10% of indicated value (2nd effective measuring range)

Accuracy (Insulation)
AC Voltage

0 to 600 V

Other

Operating temperature

0℃ to 40℃, 90% rh or less (non-condensating)Storage temperature-10℃ to 50℃, 90% rh or less (non-condensating)

Dustproof and waterproof

IP40

Drop proof

YES

Backlight

YES

Safety standard category

CAT III 600 VStandards

EN61010 (Safety), EN61326 (EMC)

Mass

IR4016, 17, 18: 820 g (28.9 oz), 3490: 840 g (29.6 oz)

Power supply
LR6 alkaline battery ×4
Continuous operating time 20 hours
17, 18: 162 × 182 × 57 mm (6.38 × 7.17 × 2.24 in)Dimensions( W × H × D ) IR4016,
3490: 162 × 167 × 52 mm (6.38 × 6.57 × 2.05 in)Accessories

L9787• TEST LEAD L9787 (1.2 m)• Neck strap• LR6 alkaline battery ×4• Instruction manual

Order code

IR4016-20

Order code

IR4017-20

Order code

IR4018-20

Order code3490

3L9788-90

Options

4IR401X, IR405X, 3490

1 TEST LEAD SET WITH REMOTE SWITCH L9788-11
2 TEST LEAD WITH REMOTE SWITCH (RED) L9788-10
3 TIP PIN L9788-90
4 BREAKER PIN L9788-92
5 MAGNETIC ADAPTER 9804-01
6 MAGNETIC ADAPTER 9804-02
7 TEST LEAD L9787
8 CONNECTION CABLE SET L4930
9 ALLIGATOR CLIP SET L4935
10 TEST PIN SET L4938
11 BREAKER PIN L9787-91

123467210Cable length 120 cm (3.94 ft)* When measuring in a CAT III environment,
be sure to attach the sleeve to the test leads.

569804-01
9804-02

9Attaches to the tip of cord

L4935

L4930

8L4938

11L9787-91

IR3455

φ11 mm (0.43 in)

7 L9787

111 TEST LEAD 9750 -01
2 TEST LEAD 9750 -02
3 TEST LEAD 9750 -03
4 TEST LEAD 9750 -11
5 TEST LEAD 9750 -12
6 TEST LEAD 9750 -13
7 ALLIGATOR CLIP 9751 -01
8 ALLIGATOR CLIP 9751 -02
9 ALLIGATOR CLIP 9751 -03
10 TEMPERATURE SENSOR 9631-01
11 TEMPERATURE SENSOR 9631-05
12 AC ADAPTER 9418-15
13 BATTERY PACK 9459

2L9788-10

1091

L9788-92 1 8.0 mm (0.31 in), φ4.0 mm (0.16 in)
2 65 mm (2.56 in), φ2.6 mm (0.1 in)

1 L9788-11

8535 mm (1.38 in)
φ3.2 mm (0.13 in)RED, 3 m (9.84 ft)
BLACK, 3 m (9.84 ft)
BLUE, 3 m (9.84 ft)
RED, 10 m (32.81 ft)
BLACK, 10 m (32.81 ft)
BLUE, 10 m (32.81 ft)
REDBLACKBLUE
Molded plastic thermistor type (1 m (3.28 ft))
Molded plastic thermistor type (5 cm (0.16 ft))

1-9

1012

1322 mm (0.87 in)
φ3.7 mm (0.15 in)
1

2

1 22 mm (0.87 in), φ3.7 mm (0.15 in)
2 48 mm (1.89 in), φ2.6 mm (0.1 in)

11Note: Company names and product names appearing in this brochure are trademarks or registered trademarks of various companies.

DISTRIBUTED BY

HEADQUARTERS
81 Koizumi,Ueda, Nagano 386-1192 Japan
https://www.hioki.com/

All information correct as of May 6, 2021. All specifications are subject to change without notice. For Southeast Asia and Oceania Regions only.

Printed in Singapore