Description
RM3545A Resistance Meter for Accurate Welding and Connection Testing
The RM3545A Resistance Meter redefines precision resistance measurement for production and development environments. Capable of measuring ultra-low resistance values from 1 nΩ to 1200 MΩ with a resolution of 1 nΩ, the RM3545A ensures every weld, busbar, and electrical connection meets exacting quality standards. Its 0.045% basic accuracy and 1 A maximum testing current allow for highly reliable low-resistance measurement, enabling the detection of minute differences between good and defective welds.
A key feature of the RM3545A is its Offset Voltage Compensation (OVC), which corrects for errors caused by electromagnetic force (EMF) in low-resistance measurements. Coupled with its temperature correction (TC) functionality, the meter automatically adjusts readings to a reference temperature, providing precise and consistent results regardless of environmental variations. This ensures fast, accurate pass/fail judgments on production lines without waiting for cooling periods.
For multi-channel testing, the RM3545A-2 can integrate up to two Z3003 Multiplexer Units, allowing up to 20 channels via the four-terminal method. When combined with the SW1002 Switch Mainframe, it can handle up to 132 channels, making it ideal for automated systems requiring 100% inspection. Its high path resistance tolerance allows seamless integration into complex test setups without concerns about wiring or contact resistance.
Connectivity and automation are strengthened through its LAN interface, compatibility with LabVIEW®, and Excel® integration via USB keyboard mode (HID). Fast measurement speeds of 21 ms further enhance throughput. Additionally, advanced features like contact-check, comparator function, and sequence maker simplify system integration and operational efficiency.
The RM3545A is perfect for EV battery packs, high-current busbars, and other critical applications where resistance accuracy affects safety, thermal management, and energy efficiency. It provides quantitative traceability for every weld or connection on production lines, supporting both development and high-speed automated inspection.
Technical Specifications Table
| Specification | Details |
| Product Name | RM3545A Resistance Meter |
| Measurement Range | 1 nΩ to 1200 MΩ |
| Resolution | 1 nΩ |
| Accuracy | 0.045% basic |
| Max Testing Current | 1 A |
| Measurement Method | 4-terminal method |
| Temperature Correction | Yes (TC function with Z2001 sensor) |
| EMF Compensation | Offset Voltage Compensation (OVC) |
| Multi-Channel Support | Up to 20 channels (with Z3003 multiplexer), 132 channels with SW1002 |
| Path Resistance Tolerance | High, allows seamless automated integration |
| Measurement Speed | 21 ms |
| Connectivity | LAN, USB (keyboard/HID), LabVIEW® compatible |
| Applications | EV battery packs, busbars, welds, production line testing |
| Optional Accessories | Z3003 Multiplexer, SW1002 Switch Mainframe, probes |
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