RM3545A-2 - Precision instrument for DC resistance, 13 ranges, integrated multiplexer option

High-precision DC resistance meter, 13 ranges from 1 mΩ to 1200 MΩ, basic accuracy 0.045 %, 1 nΩ resolution, 6 ½-digit display, multiplexer option (up to 20 channels), 2.3 ms fastest measurement time, remote control via LAN, RS-232C and USB

€3,088.00*

Content: 1 Each

*Prices excl. VAT plus shipping costs

In stock in Germany

Available stock: 2

Product number: RM3545A-2

EAN: 4536036014897

Length: 215 mm

Width: 215 mm

Height: 80 mm

Weight: 3 kg

Product information RM3545A-2 - Precision instrument for DC resistance, 13 ranges, integrated multiplexer option

Key Specifications

Resistance ranges: 1 mΩ to 1200 MΩ (13 ranges)
Basic accuracy: 0.045% rdg ± 0.010% full scale (1 mΩ range)
Resolution: 1 nΩ (1 mΩ range)
Measurement time: 2.3 ms (10 Ω range, fast mode)
Multiplexer option with Z3003 for up to 20 measurement channels (4-wire mode)

Typical Applications

Verification of busbar and weld joint resistance in battery modules
Measurement of winding resistance in motors and transformers
Testing of connection quality in EV charging connectors
Pattern resistance measurement on printed circuit boards
Automated multi-point resistance measurement (using Z3003 multiplexer option)

Detailed Product Overview

The RM3545A-2 Resistance Meter combines high-precision DC resistance measurement with integrated multiplexer capability for automated multi-channel testing. It offers 13 measurement ranges from 1 mΩ to 1200 MΩ and a maximum test current of 1 A, providing stable, repeatable results across a wide range of components and materials. With a 6 ½-digit display, 1 nΩ resolution, and a basic accuracy of ±0.045 % rdg ± 0.010 % f.s., the instrument delivers immediate, high-precision readings without the need for warm-up or manual zero adjustment.

Measurement times as short as 2.3 ms (10 Ω range, FAST mode) enable high-throughput testing and short cycle times, which is especially beneficial when the instrument is integrated into automated production lines or inspection systems. The RM3545A-2 supports all functions of the RM3545A-1 and adds multiplexer capability for efficient multi-point testing.

Integrated multiplexer capability

Two optional Z3003 Multiplexer Cards can be installed in the RM3545A-2, each providing 10 measurement channels in 4-wire mode. When two cards are fitted, the instrument can measure up to 20 channels automatically in sequence, enabling resistance evaluation of multiple DUTs without manual reconnection. This internal multiplexer configuration reduces system size, wiring effort, and cost compared to external switching systems.

For automation and data acquisition, the RM3545A-2 provides LAN, USB, and RS-232C interfaces for communication with PCs and controllers, as well as an EXT I/O port for external triggering and pass/fail control. An analog D/A output (0 V to 1.5 V DC) enables monitoring or feedback control. The command-monitor function displays communication commands and responses at the bottom of the instrument’s display, simplifying debugging during system setup and reducing integration time.

Advanced precision functions

To ensure consistent measurement results under fluctuating temperature conditions, the RM3545A-2 includes a Temperature Compensation (TC) function that references measured resistance values to a defined reference temperature. This compensates for material-specific temperature coefficients, for example those of copper (approximately 0.4 % / °C). Temperature can be measured using the supplied Z2001 sensor or a compatible external analog thermometer.

The Offset Voltage Compensation (OVC) function suppresses thermoelectric voltages and internal offset voltages by applying current in both directions and averaging the results. The temperature rise function calculates the actual temperature increase of the DUT from the change in resistance and ambient temperature, while the contact-check function detects insufficient probe contact and reduces errors caused by poor connections.

Future-proof investment

The RM3545A-2 keeps future expansion options open. One or two Z3003 Multiplexer Cards can be installed at any time, allowing the instrument to be upgraded from a single-channel configuration to an automated multi-channel measurement system. Installation requires only a Phillips screwdriver and takes about two minutes. This flexibility allows users to start with manual measurements or prototype setups and later expand to a fully automated test environment without replacing the instrument.

For applications requiring more than 20 channels, the RM3545A-2 can alternatively be combined with the HIOKI SW1002 Multiplexer System, offering up to 132 channels in 4-wire mode.

RM3545A-2 Resistance Meter
Power cord
Temperature sensor Z2001
Male EXT I/O connector
EXT. I/O connector cover
Spare fuse (F1.6AH 250 V)
Start-up guide
Operating precautions
Instruction manual

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