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, 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 | Model No. : IR4057-50 |
Wireless support Wireless communication capability for even greater convenience than legacy model Compatible with Wireless Adapter Z3210 (optional). It transfers measurements to your smartphone or tablet and allows you to quickly create reports with field photos and drawings. | |
Transport to GENNECT Cross GENNECT Cross, a free app designed specifically for use with Hioki measuring instruments, lets you check and manage measurement results and create reports. | |
Transport to the Excel® file Open an Excel® file and select a cell. | |
Product Video
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How to Use Digital Insulation Resistance Meters - Basic Course This video explains how to use a digital insulation resistance tester to measure a distribution panel. | |
Comparator function provides PASS/ FAIL decisions at a glance Compare measured values to pre-set reference values to generate a pass or fail judgment with the Comparator function. The insulation testers give you pass/ fail results using a beeping sound, LCD light, and indication right on the test lead with remote control switch (option), letting you check for insulation integrity without needing to look at the instrument. | |
Robust, damage-resistant design These instruments feature a robust design that can withstand being dropped onto concrete from a height of 1 m. | |
White LED lighting that’s easy to read in dim locations in the field The scale is lit by a white LED, ensuring that insulation resistance values are easy to read, even when using the instrument in a dim location. | |
Measurement switch designed for outstanding ease of use The instrument’s measurement switch can be operated with just the thumb. | |
200 mA grounding line continuity check function The Insulation testers can perform EV and HEV continuity checks as well as resistance measurement of safety conductors in building electrical equipment as defined by IEC 60364. |
Basic specifications (Accuracy guarantee period: 1 year, Accuracy guarantee period after adjustment made by Hioki: 1 year)
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 |
Accuracy 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 - 1000 |
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. 0.3 second for PASS/FAIL decision (based on in-house testing) | ||||
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 (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 | 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 |
Catalog: INSULATION TESTER Series Download PDF [3MB] English