Description
The Hioki ST5520 Insulation Tester is engineered for high-speed, reliable, and accurate insulation resistance testing, making it an ideal choice for battery production lines, electrical devices, and component safety verification. Known as the fastest tester in its class, the ST5520 delivers pass/fail judgments in just 50 milliseconds, drastically reducing takt times and boosting productivity in demanding environments.
Industry-Leading Speed and Accuracy
By completing tests up to 700 ms faster than legacy models, the ST5520 ensures manufacturers can achieve maximum throughput without compromising safety standards. A key advantage is its rapid residual voltage discharge, which improves overall cycle efficiency by nearly a full second compared to earlier models.
Smart Testing Functions
To safeguard quality and reliability, the ST5520 integrates a contact check function that verifies proper probe connection before initiating a test, preventing false readings. Its short-circuit check function identifies micro-shorts at low voltage (2–4 V DC), stopping potential defects from reaching customers.
Flexible and Configurable Operation
The tester offers a test voltage range of 25 V to 1000 V with fine 1 V resolution, accommodating a broad spectrum of applications. Operators can configure test conditions such as comparator limits, test duration, and response timers, while an intuitive LCD with backlight ensures clear visibility in any production setting.
Seamless Integration for Production Lines
Equipped with RS-232C and external I/O interfaces, the ST5520 integrates smoothly into automated systems. The ST5520-01 variant further supports BCD output for advanced data handling. Optional accessories, like the Switched Probe 9299, allow safe and efficient single-hand operation, enhancing workplace safety.
Compact and Reliable Design
Weighing just 1.1 kg, the ST5520 offers portability and easy installation while delivering the durability required for industrial environments. With its precision, flexibility, and unmatched speed, the Hioki ST5520 Insulation Tester is the go-to solution for manufacturers aiming to balance quality assurance with productivity.
Technical Specifications – Hioki ST5520
| Feature | Specification |
| Measurement Items | Insulation resistance (Applied DC voltage method) |
| Test Voltage Range | 25 V – 1000 V (1 V resolution) |
| Resistance Ranges | 2.000 MΩ – 4000 MΩ (depending on voltage range) |
| Basic Accuracy | ±2% rdg ±5 dgt |
| Measurement Speed | Fast: 30 ms/time; Slow: 500 ms/time |
| Display | LCD with 4-level backlight (100,000 hrs service life) |
| Memory Capacity | Up to 10 items (voltage, limits, test mode, results, etc.) |
| Comparator Settings | Upper/Lower Fail, Pass judgment with LED and beep indication |
| Interfaces | RS-232C (standard), External I/O; BCD output (ST5520-01 only) |
| Analog Output | DC +4 V full scale |
| Power Supply | 100–240 V AC, 50/60 Hz, 25 VA max |
| Dimensions (W × H × D) | 215 × 80 × 166 mm (8.46 × 3.15 × 6.54 in) |
| Weight | 1.1 kg (38.8 oz) |
| Included Accessories | Instruction Manual, Power Cord, EXT I/O Connector, Connector Cover |
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