IR4057-50
Hioki insulation testers or megohmmeters feature all-in-one designs including built-in rugged cases and test lead storage compartments. The IR4057-50 is a 5-range, 50 V to 1000 V digital insulation resistance tester with bargraph, and delivers efficient functions and features to help shorten work time associated with field insulation testing.
Simply attach the Z3210 Wireless Adapter to your compatible Hioki instrument to enable Bluetooth® connectivity.
Wirelessly connect Hioki-compliant instruments with a simple connection.
Transmit measured values to your tablet or smartphone.
Rated output voltage |
50 V DC |
125 V DC |
250 V DC |
500 V DC |
1000 V DC |
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Effective maximum indicated value |
100 MΩ |
250 MΩ |
500 MΩ |
2000 MΩ |
4000 MΩ |
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Accuracy |
±2 % rdg. ±2 dgt. |
±2 % rdg. ±2 dgt. |
±2 % rdg. ±2 dgt. |
±2 % rdg. ±2 dgt. |
±2 % rdg. ±2 dgt. |
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Lower limit resistance |
0.05 MΩ |
0.125 MΩ |
0.25 MΩ |
0.5 MΩ |
1 MΩ |
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Overload protection |
600 V AC (10s) |
660 V AC (10s) |
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DC voltage range |
4.2 V (0.001 V resolution) to 600 V (1 V resolution), 4 ranges, |
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AC voltage range |
420 V (0.1 V resolution) / 600 V (1 V resolution), 2 ranges, 50/60 Hz, |
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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) |
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Display |
Semi-transmissive FSTN LCD with back lighting, bar-graph indicator |
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Response time |
Approx. 0.3 second for PASS/FAIL decision (based on in-house testing) |
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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 |
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Power supply |
LR6 (AA) alkaline batteries × 4, Continuous use: 20 hours (based on in-house testing) |
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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) |
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Included accessories |
Connection cable L4930 ×1, Alligator clip set L4935 ×1, Test pin set L4938 ×1, Neck strap ×1, Instruction manual ×1, LR6 (AA) alkaline batteries ×4 |