Measurement example

Weld connections should have a contact resistance below 0.1 mΩ. The RM3545-02 in combination with an optional multiplexer can perform 4-terminal resistance measurements at up to 20 locations to verify this quality.


The RM3545 is the optimal measuring instrument with 0.01μΩ resolution and high accuracy that allows you to identify defective welding with a high-speed measurement in as little as 2 ms from start to finish. Identifying increased resistance at junctions is essential to avoid greater heat and therefore energy loss during charging and recharging.

Using the Multiplexer Unit Z3003 ensures usability in applications that require multi-contact measurements, for example when testing battery terminal welds on cells. Simply insert up to two Z3003 units into the slots on the back of the RM3545-02 to enable scanning measurements of up to 20 locations with 4-terminal measurement.

Equipment used:

Resistance Meter with multiplexer option for multiple scanner measurements

Resistance Meter RM3545-02

RM3545-02 Wide Range Resistance Meter with multiplexer option for high-speed measurement

  • Multi-point Testing
  • Max. resolution of 0.01 μΩ, max. testing current of 1 A
  • Measuring range of 0.00 μΩ to 1200 MΩ
  • Built-in contact check function
  • Optional use for busbar measurement available

Multiplexer for multi-point measurement Z3003

  • Ideal for building an automatic measurement system for the production process scanning multiple battery tabs.
  • Two units enable scanning measurement of up to 20 locations with 4-terminal measurement.

Resistance range 10 mΩ to 1000 MΩ 12 steps
[LP ON] 1000 mΩ to 1000 Ω range, 4 steps
Measurement accuracy ±0.006 % rdg. ±0.001 % f.s.
Testing current [LP OFF] 1 A to 1 µA DC or less, [LP ON] 1 mA to 5 μA DC
Measurement speed FAST (2.2ms) / MED (50Hz: 21ms, 60Hz: 18ms) / SLOW1 (102ms) / SLOW2 (202ms)
Functions Temperature correction, offset voltage compensation (OVC) for low resistance measurement
Interface Select from GP-IB (RM3545-01 only), RS-232C, Printer (RS-232C), or USB
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