HIOKI IR4057 Insulation Tester feature all-in-one designs including built-in rugged cases and test lead storage compartments. The IR4057 is a 5-range, 50V to 1000V digital insulation resistance tester with bargraph, and delivers 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 MO to 1000 V/4000 MO
• Digital bar graph
• Stable & high-speed digital readings, 0.3 second response time for 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 (Option L9788-11 or L9788-10)
• Continuity check via 200 mA testing
• Built in AC/DC voltage meter, useful for testing solar power generation systems and electric vehicles
Basic Specifications
Rated output voltage : 1000 V DC
Effective maximum indicated value : 4000 MO
Accuracy 1st effective measuring range MO : ±2 % rdg. ±2 dgt.
0.200 - 1000
Lower limit resistance : 1 MO
Overload protection : 660 V AC (10s)
DC voltage measurement : 4.2 V (0.001 V resolution) to 600 V (1 V resolution), 4 ranges,
Accuracy: ±1.3% rdg. ±4 dgt., Input resistance: 100 kO or higher
AC voltage measurement : 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 kO or higher, Average rectifier
Low resistance measurement : For checking the continuity of ground wiring, 10 O (0.01 O resolution) to 1000 O (1 O resolution), 3 ranges, Basic accuracy: ±3 % rdg. ±2 dgt., testing current 200 mA or more (at 6 O or less)
Display : Semi-transmissive FSTN LCD with back lighting, bar-graph indicator
Response time : Approx. 0.3 second for PASS/FAIL decision (based on in-house testing)
Other functions : Indicate MO 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 (based on in-house testing)
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, 640 g (22.6 oz) (including batteries, excluding test leads)
Accessories : Test Lead L9787 ×1, Neck strap ×1, Instruction manual ×1, LR6 (AA) alkaline batteries ×4