RM3546

RM3546 is a high-precision DC resistance meter optimized for weld resistance inspection on battery cells and modules. It supports stable micro-ohm measurements performed shortly after welding, while the joint is still cooling down and resistance values are affected by temperature changes, extended wiring and multiple contact interfaces along the measurement path. The instrument also incorporates active circuit protection up to DC 60V for safe manual resistance measurements during battery module service. The RM3546 offers 13 resistance ranges from 1mohm to 1000Mohm with a maximum test current of 1A. The lowest 1mohm range provides the resolution required for accurate evaluation of small resistance changes at welded joints, with a measurement resolution down to 1nohm and a basic accuracy of ±0.045% rdg ±0.010% f.s.. Optional internal multiplexer cards enable automated multi-channel resistance measurements without the need for an external scanner or additional control hardware.

• Path resistance tolerance up to 9ohm (PR mode, 500mA) 
• Multiplexer option with Z3003 for up to 20 measurement channels (4-wire mode)
• A-OVC function ensures measurement stability even in environments with large temperature variations
• A-TC function enables stable measurements after welding, reducing takt time
• LAN, USB, RS-232C interface
• Dimension is 215mmW × 80mmH × 306.5mmD (8.46"W × 3.15"H × 12.07"D)
• Operating temperature and humidity range from 0 to 40°C (32 to 104°F), 80%RH/less (non-condensing)

Contents

RM3546 resistance meter, Power cord, Temperature sensor Z2001, Male EXT I/O connector, EXT. I/O connector cover, Start-up guide, Operating precautions.