Hioki RM3545A Resistance Meter

The RM3545A is engineered for accurate resistance measurements across a broad spectrum—from very low resistances (milliohms or µΩ) to high resistances (MΩ). Using four-terminal (Kelvin) measurement techniques, it minimizes errors from lead and contact resistance, ensuring that readings reflect only the sample under test.

It offers flexible test currents, allowing high current on low-resistance ranges for better signal levels and stability. For higher resistance ranges, lower currents are used to avoid heating or damaging the device under test. The unit maintains high basic accuracy (around ±0.006 %) and fine resolution (down to 0.01 µΩ in some ranges), making it suitable for precision tasks like checking motor windings, relay contacts, and connectors.

A distinguishing feature is its ability to interface with a multiplexer (e.g. optional channel selector unit), enabling automated multi-point resistance measurements across many channels without manual reconnection. The meter supports fast measurement speeds and provides features like comparator (HI/OK/LO) judgments, external I/O for system integration, and data logging capability.

Physically, it is built with a rugged chassis suitable for laboratory and industrial environments. The user interface includes clear displays, control buttons, and status indicators. Connectivity options (e.g., USB, GPIB) likely exist depending on the specific model variant. Overall, the RM3545A balances precision, flexibility, and automation readiness for professional resistance measurement tasks.

Features

• Wide Resistance Range — From micro-ohm (or low milliohm) levels up to megohm ranges.
• High Accuracy — Basic accuracy approx. ±0.006 % to ensure precise measurements.
• Four-Terminal (Kelvin) Measurement — Eliminates lead/contact resistance from results.
• Selectable Test Currents — Higher currents for low-resistance ranges, lower currents for high resistance.
• High Resolution — Down to 0.01 µΩ resolution in favorable ranges.
• Multiplexer Support — Option for multi-channel measurements via external channel switching unit.
• Comparator Judgment Capability — HI / OK / LO output for pass/fail judgments.
• Fast Measurement Speeds — Rapid conversion and output for efficient testing workflows.
• External I/O / Interface Support — For system integration, automated control, and data transfer.
• Rugged Build and User Interface — Durable housing, intuitive controls, clear display, and status indicators.

Includes

• Power cord ×1
• Temperature sensor Z2001 ×1
• Male EXT I/O connector ×1
• EXT. I/O connector cover ×1
• Spare fuse (F1.6AH 250 V)×1
• Start up guide ×1
• Operating Precautions ×1
• Instruction manual ×1