Hioki IR4056 Insulation Tester
The IR4056 is a versatile five-range digital insulation resistance tester that operates from 50 V to 1000 V. It delivers stable readings with a quick pass/fail judgment, includes continuity checking, and is built for field durability—making it a reliable tool for electrical maintenance, troubleshooting, and preventive inspections.
Description
The IR4056 is designed to streamline insulation testing across a variety of electrical systems. Its five selectable test voltages (50 V, 100 V, 250 V, 500 V, 1000 V) allow the user to match test conditions to the insulation under test. The instrument provides stable digital readings, with pass/fail judgments typically appearing within 0.8 seconds, aiding rapid decision-making in the field.
It also incorporates a continuity measurement function that applies a current (200 mA or more for low-resistance ranges) to verify circuit connectivity before applying insulation voltage. The tester’s durable construction allows for drop resistance (up to 1 meter) and is suited for the tough conditions often encountered on-site. In addition, the device offers internal dielectric strength testing, and it ensures safety by maintaining clear separation between high-voltage outputs and measurement terminals.
ERGONOMIC features like a clear backlit LCD, indicator LEDs, and audible signals during pass/fail judgment help improve usability under varied lighting conditions. Overall, the IR4056 balances speed, safety, and ruggedness for effective insulation testing in industrial and commercial environments.
Features
- Five Test Voltages — 50 V, 100 V, 250 V, 500 V, and 1000 V for a wide insulation resistance testing range.
- Quick Pass/Fail Judgment — Decision in approximately 0.8 seconds for fast evaluation.
- Continuity Measurement — Applies a current (e.g. 200 mA or more) to test low-resistance connectivity.
- Stable Digital Readings — Reduces fluctuations and improves measurement reliability.
- Drop-Resistant Design — Can withstand drops from up to 1 meter onto concrete.
- Dielectric Strength Test Capability — Supports internal insulation strength verification.
- Backlit LCD & Indicators — Clear display plus LEDs and audible signals for pass/fail alerts.
- Robust Field Construction — Built for use in challenging environments.
- Safety Isolation — High-voltage outputs are safely isolated from measurement terminals.
Includes
- [IR4056-20] Test lead L9787 ×1
- Neck strap ×1
- Instruction manual ×1
- LR6 (AA) alkaline batteries ×4
- [IR4056-21] Test lead set with remote switch L9788-11 ×1
- Neck strap ×1
- Instruction manual ×1
- LR6 (AA) alkaline batteries ×4
