HIOKI IR4056-20 Insulation Tester

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

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