Hioki IR4057-20 Digital Meg-Ohm Meter Insulation Tester

• High-speed model with Bar Graph for visual judgments
• Comparator Function Improves Work Efficiency
• Identify the Insulation and Low Resistance Conditions with the PASS/ FAIL Icon
• FAIL Alert with Red LCD and Audio Buzzer
• Stable Digital Readings are Easy to Read

Make measurements safely and efficiently with a digital insulation resistance meter

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. (also pair with insulation resistance measurement and low-resistance measurement)
• Stable display delivers quick and easy-to-read results, increasing work efficiency.

Instantaneous judgment

The insulation testers deliver results as soon as the test lead makes contact, letting you finish your work rapidly similar to a continuity check.

Identify PASS/FAIL using light and sound

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*1, letting you check for insulation integrity without needing to look at the instrument.

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 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 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 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 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 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.

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