Hioki RM3545A-1 Resistance Meter

Product Highlights

The Hioki RM3545A-1 is a DC Resistance Meter with Built-In GP-IB Interface. Measuring a broad range of resistance values, the multichannel-capable resistance meter meets applications in advanced research and production for testing winding resistance of motors and transformers; contact resistance of power relays, switches, and connectors; and resistance of signal relays and magnetic parts.

As electric mobility gains popularity, manufacturers are developing components for higher currents and voltages. Since even minuscule amounts of resistance can have a significant impact on energy efficiency and safety, more accurate quality control focusing on resistance is required. The Resistance Meter RM3545A facilitates accurate resistance measurements and is suitable for diverse applications in development and production lines.

Electric resistance is measured by passing a current through a measurement target such as a weld. Pass and fail judgments are generated based on variation in resistance values. A typical low-resistance weld can have resistance ranging from 10 µΩ to 100 µΩ. The Resistance Meter RM3545A provides a 1000 µΩ range and 1 nΩ resolution, allowing it to measure low resistance values with a high degree of precision. If a weld is insufficient, its resistance value will exceed that of a non-defective weld. Pass and fail results are generated for non-defective and defective welds based on minuscule differences in their resistance values. Weld quality can be managed quantitatively for all welds passing through a production line, ensuring traceability.

When measuring low resistance, due to the voltage generated when different metals come into contact with one another (known as electromagnetic force, or EMF), the measurement values can be unstable. The Hioki RM3545A is built in with an Offset Voltage Compensation (OVC) function to correct for the effects of EMF, making the instrument ideal for measuring low resistance of the welding points of busbars.

The resistance values vary with temperature. To ensure consistent testing with a resistance meter, it is necessary to eliminate the effects of temperature. The RM3545A has got you covered.

Features

• Basic accuracy: 0.045%
• Maximum accuracy: 0.006% of reading + 0.001% of full scale
• Broad measurement range: 1000 µΩ to 1000 MΩ
• Measure low resistance values at high precision and high, 1 nΩ resolution
• Equipped with advanced features, ensuring precise resistance measurement (OVC, temperature measurement and correction function)
• High path resistance tolerance allows seamless integration into an automatic test system, eliminating concerns about wiring or contact resistance
• Advanced contact-check, comparator function, control and communications features
• Add multichannel capability in a low-cost, space-saving package
• Easy to embed in automatic test system
• Low-power measurement can be used in testing under IEC 60512-2 and other contact standards
• Accuracy defined without zero adjustment
• Free power supply (100 V to 240 V) with automatic frequency switching
• Measurement cables can be extended easily, even when using 1 A measurement current range
• Judgment sounds with user-selectable patterns
• Low-power resistance measurement with open voltage not exceeding 20 mV
• High-speed, comprehensive productivity support delivers decisions in as little as 2.0 ms from start to finish