Hioki IR4057-20 Insulation Resistance Tester

26829.1 MFG #: IR4057-20
$399.00 / EA
  • Brand: Hioki
  • Condition: New

  • Description

    5-range testing voltage 50 V/100 MΩ to 1000 V/4000 MΩ Stable & medium-speed digital readings, response time at PASS/ FAIL decision 0.3 second Drop-proof onto concrete from 1m (3.28 feet) Bright LED luminous LCD, Test lead with bright LED lamp to illuminate near hand (Option L9788-11 or L9788-10) Continuity check via 200 mA testing Bar graph for visual judgments Built in AC/DC voltage meter, useful for testing solar power generation systems and electric vehicles

    The Hioki IR4057-20 insulation tester delivers enhanced comparator (comparative judgment) functionality and notification of judgment results using light and sound, allowing operators to assess results at a glance, yielding significant improvements in work efficiency.

    Additional IR4057-20 Functionality
    The IR4057-20 can display measurement results in bar graph form to facilitate a more visual judgment process. Additionally, the higher performance IR4057-20's comparator function yields faster judgments than the IR4056-20 (approximately 0.3 seconds for the IR4057-20 compared to approximately 0.8 seconds for the IR4056-20).

    IR4057-20 Digital Insulation Resistance Tester

    Testing voltage 50V DC 125V DC 250V DC 500V DC 1000V DC
    Effective maximum indicated value 100 MΩ 250 MΩ 500 MΩ 2000 MΩ 4000 MΩ
    1st effective measuring range MΩ
    ±4% rdg.
    0.200 - 10.00
    ±4% rdg.
    0.200 - 25.0
    ±4% rdg.
    0.200 - 50.0
    ±4% rdg.
    0.200 - 500
    ±4% rdg.
    0.200 - 1000
    Lower limit resistance 0.05 MΩ 0.125 MΩ 0.25 MΩ 0.5 MΩ 1 MΩ
    Overload protection AC 600 V (10s) AC 1200 V (10s)
    DC voltage measurement 4.2V (0.001V resolution) to 600V (1V resolution), 4 ranges, Accuracy: ±1.3% rdg. ±4 dgt., Input resistance: 100 kΩ or higher
    AC voltage measurement 420V (0.1V resolution) / 600V (1V resolution), 2 ranges, 50/60 Hz, Accuracy: ±2.3% rdg. ±8 dgt., Input resistance: 100 kΩ or higher, Average rectifier
    Low resistance measurement 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. 0.3 second for PASS/FAIL decision (at HIOKI's conditions)
    Other functions Indicate MΩ measurement value after a lapse of one minute, 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 (at HIOKI’s conditions) Number of measurements: 1000 times (at 5 s ON, 25 s OFF cycle, insulation measure of lower limit resistance value to maintain nominal output voltage)
    Dimensions, 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)

    Includes: L9787 Test Lead, Neck strap, Instruction manual, and four (4) LR6 alkaline batteries.