INSULATION TESTER

IR4056

5-Range, 50 to 1000V Digital Insulation Tester with Continuity Check

Hioki insulation testers or megohmmeters feature all-in-one designs including built-in rugged cases and test lead storage compartments. The IR4056 is a 5-range, 50V to 1000V digital insulation resistance tester with efficient functions and features to help shorten work time associated with field insulation testing. CAT III 600 V Excluding IR4056-21 Key Features • 5-range testing voltage of 50 V/100 MΩ to 1000 V/4000 MΩ • Stable & medium-speed digital readings, 0.8 second response time of PASS/ FAIL decisions • Drop proof onto concrete from 1m (3.28 feet) • Bright LED, luminous LCD, test lead with bright LED lamp to illuminate near hand (Also available in the IR4056-21) • Continuity check via 200 mA testing • Built in AC/DC voltage meter, useful for testing solar power generation systems and electric vehicles

Model No. (Order Code)

IR4056-20 Bundled Test Lead L9787
IR4056-21 Bundled Test Lead L9788-11, Not CE marked

Guarantee3years
CE
DROPPROOF

Product Video


How to Use Digital Insulation Resistance Meters - Basic Course

This video explains how to use a digital insulation resistance tester to measure a distribution panel. ※ Shooting was done with Japanese model IR 4052. The global model name is IR 4057.


Comparator function provides PASS/ FAIL decisions at a glance

Compare measured values to pre-set reference values to generate a pass or fail judgment with the Comparator function. (also pair with insulation resistance measurement and low-resistance measurement) The insulation testers give you pass/ fail results using a beeping sound, LCD light, and indication right on the test lead with remote control switch*, letting you check for insulation integrity without needing to look at the instrument. (*Standard with the IR4056-21) The image is IR4057


Robust, damage-resistant design

These instruments feature a robust design that can withstand being dropped onto concrete from a height of 1 m. Difficult to damage, this insulation tester is ideal for use in the field.


White LED lighting that’s easy to read in dim locations in the field

The scale is lit by a white LED, ensuring that insulation resistance values are easy to read, even when using the instrument in a dim location. *The image is IR 4057


Measurement switch designed for outstanding ease of use

The instrument’s measurement switch can be operated with just the thumb. Press for a single measurement or lift up for continuous measurement of insulation resistance.


200 mA grounding line continuity check function

The Insulation testers can perform EV and HEV continuity checks as well as resistance measurement of safety conductors in building electrical equipment as defined by IEC 60364.


Basic specifications (Accuracy guaranteed for 1 year, Post-adjustment accuracy guaranteed for 1 year)

Rated output voltage50 V DC125 V DC250 V DC500 V DC1000 V DC
Effective maximum indicated value100 MΩ250 MΩ500 MΩ2000 MΩ4000 MΩ
Accuracy 1st effective measuring range MΩ±2 % rdg. ±2 dgt.
0.200 - 10.00
±2 % rdg. ±2 dgt.
0.200 - 25.0
±2 % rdg. ±2 dgt.
0.200 - 50.0
±2 % rdg. ±2 dgt.
0.200 - 500
±2 % rdg. ±2 dgt.
0.200 - 1000
Lower limit resistance0.05 MΩ0.125 MΩ0.25 MΩ0.5 MΩ1 MΩ
Overload protection600 V AC (10s)660 V AC (10s)
DC voltage measurement4.2 V (0.001 V resolution) to 600 V (1 V resolution), 4 ranges,
Accuracy: ±1.3 % rdg. ±4 dgt., Input resistance: 100 kΩ or higher
AC voltage measurement420 V (0.1 V resolution) / 600 V (1 V resolution), 2 ranges, 50/60 Hz,
Accuracy: ±2.3% rdg. ±8 dgt., Input resistance: 100 kΩ or higher, Average rectifier
Low resistance measurementFor checking the continuity of ground wiring, 10 Ω (0.01 Ω resolution) to 1000 Ω (1 Ω resolution), 3 ranges, Basic accuracy: ±3 % rdg. ±2 dgt., testing current 200 mA or more (at 6 Ω or less)
DisplaySemi-transmissive FSTN LCD with back lighting, bar-graph indicator
Response timeApprox. 0.8 second for PASS/FAIL decision (based on in-house testing)
Other functionsLive circuit indicator, Automatic electric discharge, Automatic DC/AC detection, Comparator, Drop proof, Auto power save
Power supplyLR6 (AA) alkaline batteries ×4, Continuous use: 20 hours (Comparator off, backlight off, 500 V range, no load)
Number of measurements: 1000 times (at 5 s ON, 25 s OFF cycle, insulation measurement of lower limit resistance value to maintain nominal output voltage)
Dimensions and mass159 mm (6.26 in) W × 177 mm (6.97 in) H× 53 mm (2.09 in) D, 600 g (21.2 oz) (including batteries, excluding test leads)
Accessories[IR4056-20] Test lead L9787 ×1, Neck strap ×1, Instruction manual ×1, LR6 (AA) alkaline batteries ×4
[IR4056-21] Test lead set with remote switch L9788-11 ×1, Neck strap ×1, Instruction manual ×1, LR6 (AA) alkaline batteries ×4

Hioki offers members manuals and other technical documentation.
The documents are available for download on your myHIOKI page.

Catalogs

Catalog: INSULATION TESTER IR4056, IR4057, IR4058 Download PDF  [2MB]
e-BOOK
English

User Guides

Insulation Tester series selection guide Download PDF  [290KB] English

Outline Drawings


Ver.03
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Technical Notes

Drivers, Firmware

No results were found.

Others

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Options

L9787 options

Exclusively for the L9787 *The L9787 is bundled (IR4056-20)

TEST LEAD L9787

Bundled with alligator clip, 1.2 m (3.94 ft) length

BREAKER PIN L9787-91

For checking breaker terminal, Detachable for tip of the L9787, 48 mm (1.89 in) length, φ 2.6 mm (0.10 in)

L9788 options

Exclusively for the L9788-10/ L9788-11 *The L9788-11 is bundled (IR4056-21)

TEST LEAD WITH REMOTE SWITCH (RED) L9788-10

Lighting LED lamp & comparator indicator (Operate only when main unit provides a comparator function), 1.2 m (3.94 ft) length

TEST LEAD SET WITH REMOTE SWITCH L9788-11

Bundled with Test Lead with Remote Switch L9788-10/ Earth lead, alligator clip, 1.2 m (3.94 ft) length

TIP PIN L9788-90

Spare parts for tip of the L9788/ L9788-10, Tip length 35 mm (1.38 in)

BREAKER PIN L9788-92

For checking breaker terminal, Detachable for tip of the L9788-10, 65 mm (2.56 in) length, φ 2.6 mm (0.10 in)

Shared Option

MAGNETIC ADAPTER 9804-02

Attaches to the tip of cord, black ×1, φ11 mm (0.43 in)

Images

*Click on the image to enlarge it.


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