Insulation Tester IR4056-21 HIOKI

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

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)

Response time Approx. 0.8 second for PASS/FAIL decision (based on in-house testing)

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