Digital Insulation Resistance Tester IR4056-20
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
Key Features
- 5-range testing voltage of 50 V,100 M Ohms to 1000 V/4000 M Ohms
- 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
Product Warranty Period: 3 years
Included Accessories:
Test lead L9787 ×1, Neck strap ×1, Instruction manual ×1, LR6 (AA) alkaline batteries ×4
CAT III 600 V
Key Features
- 5-range testing voltage of 50 V,100 M Ohms to 1000 V/4000 M Ohms
- 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
Product Warranty Period: 3 years
Included Accessories:
Test lead L9787 ×1, Neck strap ×1, Instruction manual ×1, LR6 (AA) alkaline batteries ×4
| Rated output voltage | 50 V DC | 125 V DC | 250 V DC | 500 V DC | 1000 V DC |
|---|---|---|---|---|---|
| Effective maximum indicated value | 100 MΩ | 250 MΩ | 500 MΩ | 2000 MΩ | 4000 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 resistance | 0.05 MΩ | 0.125 MΩ | 0.25 MΩ | 0.5 MΩ | 1 MΩ |
| Overload protection | 600 V AC (10s) | 660 V AC (10s) | |||
| DC voltage range | 4.2 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 range | 420 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 range | For 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) | ||||
| Display | Semi-transmissive FSTN LCD with back lighting, bar-graph indicator | ||||
| Response time | Approx. 0.8 second for PASS/FAIL decision (based on in-house testing) | ||||
| Other functions | Live circuit indicator, Automatic electric discharge, Automatic DC/AC detection, Comparator, Drop proof, Auto power save | ||||
| Power supply | LR6 (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 mass | 159 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) | ||||
| Included 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 | ||||
ACCESSORIES
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)
MAGNETIC ADAPTER 9804-02
- Attaches to the tip of cord, black ×1, φ11 mm (0.43 in)
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)
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
MAGNETIC ADAPTER 9804-02
- Attaches to the tip of cord, black ×1, φ11 mm (0.43 in)
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)
MAGNETIC ADAPTER 9804-02
- Attaches to the tip of cord, black ×1, φ11 mm (0.43 in)
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)
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
MAGNETIC ADAPTER 9804-02
- Attaches to the tip of cord, black ×1, φ11 mm (0.43 in)
DOWNLOADS
Catalog
- INSULATION TESTER Series
User Guide
- Insulation Tester series selection guide
Manual
- INSULATION TESTER IR4056-20,IR4057-20
Declaration of Conformity
- INSULATION TESTER IR4051-10,IR4051-11,IR4052-10,IR4052-11,IR4053-10,IR4053-11,IR4056-20,IR4057-20
Catalog
- INSULATION TESTER Series
User Guide
- Insulation Tester series selection guide
Manual
- INSULATION TESTER IR4056-20,IR4057-20
Declaration of Conformity
- INSULATION TESTER IR4051-10,IR4051-11,IR4052-10,IR4052-11,IR4053-10,IR4053-11,IR4056-20,IR4057-20