Measurement Minute: Lake Shore's M81-SSM Hybrid DC/AC System Measures Low Resistance
In this video, we demonstrate precise low-resistance measurement using the new Lake Shore M81-SSM. See how to measure a standard 10 milliohm resistor with a four-wire (Kelvin) configuration using the BCS current source module (BCS-10) and the voltage measurement module (VM-10). Experience the standout benefits of Lake Shore’s AC lock-in capability and how a single button press makes switching modes fast and effortless. This allows you to explore the limits of the DC technique and swiftly get accurate measurements with an AC lock-in technique.
What you’ll learn:
- How to configure the Lake Shore M81 for low-resistance measurement in a four-wire Kelvin setup
- How the BCS current source can push both DC and AC currents, and how this enables rapid mode changes, from DC to sine wave AC
- The power of AC lock-in to cancel offsets and noise for ultra-precise measurements
- How a DC/AC hybrid approach minimizes heating and offsets, especially for cryogenic or heat-sensitive measurements
- Why very low currents can introduce large offset errors in DC-only measurements, and how AC lock-in overcomes this
Notes and tips:
- Use the four-wire Kelvin configuration to minimize lead resistance and contact effects
- The one-button DC/AC switch enables quick mode changes without recalibrating
- AC lock-in is especially advantageous at cryogenic temperatures or when minimizing self-heating is critical
About Us
Lake Shore Cryotronics is a leading innovator in solutions for measurement over a wide range of temperature and magnetic field conditions. We are committed to our customers’ advancement of science and technology to benefit humanity.
Contact Us
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sales@lakeshore.com |
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575 McCorkle Blvd Westerville, OH |
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