How to Perform Accurate Low Resistance Measurements

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Pro Benchtop DC Power Supplies
+ Pro Benchtop DC Power Supplies
Pro Benchtop DC Power Supplies
+ Pro Benchtop DC Power Supplies

Understanding Low Resistance Measurement Accuracy

Accurate low resistance measurement is critical in applications such as contact resistance testing, Printed Circuit Board (PCB) trace validation, and material characterization. However, traditional 2-wire measurement methods introduce significant errors due to lead resistance, thermal electromotive force (EMF), and self-heating effects, especially when measuring in the micro-ohm range.

Advanced measurement techniques using source/measure units (SMUs) and nanovoltmeters enable precise control of test current and voltage sensing. By implementing 4-wire Kelvin connections and optimizing test conditions, engineers can eliminate parasitic effects and achieve highly stable and repeatable resistance measurements.

Precision Low Resistance Measurement Solution

Performing accurate low-resistance measurements requires precise current sourcing and sensitive voltage measurement to capture small voltage drops reliably. The Keysight B2961C precision power source, combined with the 34420A nanovolt/micro-ohm meter, provides an integrated solution for stable current sourcing and high-resolution voltage measurement. Supporting 4-wire (Kelvin) techniques, the setup eliminates errors caused by lead resistance and improves measurement accuracy. It also minimizes thermal electromotive force (EMF) effects that can impact low-level signals. Together, these capabilities enable flexible current adjustment, reduce self-heating, and ensure precise, repeatable characterization of low-resistance devices.
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