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Introduction to the HIOKI IR4056/IR4057 Insulation Tester
| Basic specifications (Accuracy guaranteed for 1 year) |  |
| 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 | Accuracy
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) |
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| 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. 0.8 second for PASS/FAIL decision (at HIOKI's conditions) | | Other functions | 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) | | Supplied accessories | TEST LEAD L9787 ×1, Neck strap ×1, Instruction Manual ×1, LR6 (AA) alkaline batteries ×4 |
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Features
| Insulation Tester IR4056-20 and IR4057-20 Features | | - Enhanced comparator functionality for instantaneous pass/fail judgments
The comparator compares measured values to pre-set reference values to make pass/fail decisions. Thanks to improved response performance, the IR4056-20 and IR4057-20 provide an instantaneous pass/fail decision when the test lead is placed in contact with a target.
Furthermore, the comparator function allows operators to assess pass/fail decisions based on light and sound cues. “Pass” conditions are signaled by a short beeping sound and a green LED, while “fail” conditions are signaled by a longer, continuous tone and a red-backlit measurement screen. When used with the optional Test Lead with Remote Control Switch L9788-11, the “fail” condition can also be easily identified by the lead’s red LED.
It is not unusual for technicians to need to measure more than 100 locations in a single building, so the instruments’ ability to generate a continuous series of pass/fail decisions will yield significant improvements in work efficiency. - Easy-to-read measured values
Most measurement targets consist of long cables that have already been laid in a facility. Consequently, insulation resistance readings are often unstable due to the effects of noise emitted by nearby electrical wiring and other sources of interference. The IR4056-20 and IR4057-20 employ a variety of measures to stabilize the display of readings so that it is easy to read measured values, even in challenging environments. - Improved safety for high-voltage output
The IR4056-20 and IR4057-20 provide functionality for generating high-voltage 500V and 1,000V output when testing high-voltage equipment. Normally, inadvertent application of a high voltage to a low-voltage device can damage the device. To protect against this risk, the new instruments provide functionality for preventing the application of unintentional high-voltage output.
Outputting 500V or 1,000V requires two steps: placing the function key in a certain position and then pressing a flashing key to cancel the high-voltage output lock feature. In this way, the instruments are designed to prevent inadvertent output due to mistaken function key operation. - AC/DC voltage measurement in anticipation of increasingly widespread use of solar power and electric vehicles
There is growing need for instruments capable of DC voltage measurement due to increasingly widespread use of solar power and electric vehicles. As a result, HIOKI designed the IR4056-20 and IR4057-20 with both AC and DC voltage measurement functionality. - Suitability for use in testing and inspection of electric vehicles, hybrid vehicles, and building electrical equipment
In addition to low-resistance measurement at 200 mA DC, the IR4056-20 and IR4057-20 support JIS C 60364-compliant insulation measurement of safety conductors in building electrical equipment and indirect safety contact testing in electric and hybrid vehicles.
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| 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). | |
| Principal Applications | | - Maintenance inspections of electrical equipment
- Maintenance inspections of building and manufacturing plant equipment
- Maintenance inspections of communications equipment and instrumentation
- Voltage measurement in solar power systems and electric vehicles
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| Principal Specifications | | Resistance measurement
(Accuracy is guaranteed for 1 year within a temperature and humidity range of 23°C ±5°C and 90% RH or less.)| With L9787 Test Lead | IR4056-20, IR4057-20 | | Rated measurement voltage (DC) | 50 V | 125 V | 250 V | 500 V | 1,000 V | | Effective maximum display value | 100 MΩ | 250 MΩ | 500 MΩ | 2,000 MΩ | 4,000 MΩ | | Center display value | 2 MΩ | 5 MΩ | 10 MΩ | 50 MΩ | 100 MΩ | | No. 1 effective measurement range [MΩ] | 0.200 to 10.00 | 0.200 to 25.0 | 0.200 to 50.0 | 0.200 to 500 | 0.200 to 1,000 | | Accuracy | ±4% rdg. | | No. 2 effective measurement range [MΩ] | 10.1 to 100.0 | 25.1 to 250 | 50.1 to 500 | 501 to 2,000 | 1,010 to 4,000 | | Accuracy | ±8% rdg. | | Other measurement range [MΩ] | 0 to 0.199 | | Accuracy | ±2% rdg. ±6 dgt. | | Lower-limit resistance value at which a constant measurement voltage can be expected to be maintained | 0.05 MΩ | 0.125 MΩ | 0.25 MΩ | 0.5 MΩ | 1 MΩ | | External application voltage protection | 600 V AC10 sec. | 1,200 V AC10 sec. |
Basic specifications (red text: IR4057-20 only)
| Display | Backlit FSTN LCD with digital bar graph (IR4057-20) | | Functionality | Live wire warning, automatic discharge, grounding wire continuity check, AC/DC automatic detection, comparator-based judgment, fuse break detection, remaining battery life display | | IR4057-20 added functionality | 1-min. value display (automatically hold measured value obtained 1 minute after measurement starts) | | Power supply | Size AA alkaline battery (LR6) × 4 | | Continuous operating time | Approx. 20 hours (with comparator and backlight off and measurement with measurement terminals open in 500 V range) | | Auto power saving | Approx. 10 min. (since last operation) | | Operating temperature and humidity range | 0°C to 40°C, 90% RH or less (non-condensing) | | Storage temperature and humidity range | -10°C to 50°C, 90% RH or less (non-condensing) | | Maximum rated terminal-to-ground voltage | 600 V AC/DC (measurement CAT III), expected transient overvoltage of 6,000 V | | Withstand voltage | 7,060 V AC, 50/60 Hz, between all measurement terminals and chassis for 1 min. | | IP class | IP40 (EN 60529) | | Compliant standards | EN 61326 (EMC), EN 61557-1/-2/-4/-10JIS C 1302 (insulation resistance testers) | | Drop resistance | From 1 m onto concrete | | Dimensions | 159 (W) × 177 (H) × 53 (D) mm
| | Weight | IR4056-20: 600 g
IR4057-20: 640 g (Including batteries, not including test lead) | | Accessories | Instruction manual, size AA alkaline battery × 4, Test Lead L9787, neck strap | | Options | Test Lead with Remote Switch (Red) L9788-10
Test Lead Set with Remote Switch L9788-11
Tip Pin L9788-90
Breaker Pin L9787-91
Breaker Pin L9788-92
Magnetic Adapter 9804-02 |
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