Hioki RM3548-50 Resistance Meter

Overview

The Hioki RM3548-50 is a precision handheld resistance meter designed for electrical maintenance professionals in industries such as electric vehicles, aircraft, and motor/transformer systems. With a measurement range from 0.1 µΩ to 3.5 MΩ and basic accuracy of 0.02%, it combines precision with practical field usability. Beyond basic resistance measurement, the instrument performs automatic temperature correction, converts resistance to estimated motor temperatures, and calculates cable lengths with 1 cm precision. Advanced connectivity enables seamless data transfer for efficient recording and analysis.

Key Features

• Measurement range: 0.1 µΩ to 3.5 MΩ with 0.02% basic accuracy and 0.1 µΩ maximum resolution
• Maximum testing current: 1 A
• Automatic temperature correction ensures accurate results and faster testing
• Calculates estimated motor temperature from resistance readings
• Cable length calculation with 1 cm precision
• Four-wire measurement method with Offset Voltage Compensation (OVC) for high-accuracy readings
• Automatic overvoltage protection up to 60 V DC for safe operation
• Wireless data connectivity with optional Z3210 Wireless Adapter for Excel and mobile app integration
• Complies with UN ECE R100 international safety standards for EV maintenance
• Temperature measurement range: -10.0°C to 99.9°C

Applications

• EV and hybrid vehicle maintenance including equipotential bonding tests and battery connection checks
• Motor winding and transformer winding resistance measurements
• Aircraft overhaul and maintenance with specialized probes for non-damaging surface measurement
• Measurement through paint and coatings using needle probes

Included Accessories

• RM3548-50 Resistance Meter
• L2107 Clip Type Leads
• Z2002 Temperature Sensor
• Z5041 Protector Case