Hioki ST5520 Insulation Resistance Tester

Overview

The Hioki ST5520 is a compact insulation resistance tester designed for rapidly assessing electrical safety compliance of various devices. It supports configurable test voltages from 25 V to 1000 V with 1 V resolution, enabling users to test products across different voltage classifications. Featuring rapid measurement in as little as 50 milliseconds and quick discharge of residual voltage, the ST5520 is suitable for production line testing and field inspections.

Key Features

• Rapid measurement: assessment in as fast as 50 ms
• Freely configurable test voltage: 25 V to 1000 V with 1 V resolution
• Contact check function to prevent errors from poor contact
• Short-circuit check function to stop defects before reaching market
• Quick discharge of residual voltage
• Basic accuracy: ±2% reading ±5 digits
• Selectable measurement speed: Fast (30 ms) or Slow (500 ms)
• LCD display with 4-level backlight and 100,000-hour service life
• Internal memory: saves up to 10 test configurations
• Comparator with upper/lower limit pass/fail assessment
• RS-232C interface and External I/O for automation support
• Compact design: 215 mm (W) × 80 mm (H) × 166 mm (D)

Applications

• Production line testing for electrical safety compliance
• Field inspections and maintenance verification
• Medical device and general-use electrical device testing
• Quality assurance and defect detection

Included Accessories

• Instruction Manual
• Power cord
• EXT. I/O Connector
• Connector Cover