Original Hioki IR4056-20 Resistance Tester High Precision 5-Range 50 to 1000V Digital Insulation & Continuity Electronic Tester
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.
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
Continuity check via 200 mA testing
Built in AC/DC voltage meter, useful for testing solar power generation systems and electric vehicles
Rated output voltage50 V DC125 V DC250 V DC500 V DC1000 V DCEffective maximum indicated value100 MΩ250 MΩ500 MΩ2000 MΩ4000 MΩAccuracy 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 - 1000Lower limit resistance0.05 MΩ0.125 MΩ0.25 MΩ0.5 MΩ1 MΩOverload 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 higherAC 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 rectifierLow 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 indicatorResponse 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 savePower 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)