The Digital Micro-Ohmmeter is a precision low-resistance measurement instrument designed for electrical engineers who need to measure resistance values in the micro-ohm range.
The instrument applies a stable DC test current and measures the voltage drop using a precision measurement circuit.
It is suitable for identifying high-resistance electrical connections and evaluating the condition of switching contacts.
Industry examples also use contact resistance meters for busbar joints, isolator contacts, weld joints and bonding resistance.
Q: What is a micro-ohmmeter?
A: A micro-ohmmeter is an instrument designed to accurately measure extremely low electrical resistance, typically using a high test current and precision voltage measurement.
Q: Why is a 4-wire connection used?
A: A Kelvin 4-wire measurement method separates current injection and voltage measurement paths, reducing the influence of lead resistance on low-resistance measurements.
Q: Is a micro-ohmmeter the same as a contact resistance tester?
A: In many power-testing applications, the terms are used interchangeably, although a micro-ohmmeter can also be used for other low-resistance measurements.