Metrology Glossary: Megohmmeter

What Is A Megohmmeter?

A megohmmeter is a unique type of ohmmeter, which serves the purpose of gauging the electrical resistance exhibited by insulators. Insulators act as barriers to the flow of electricity, essential in safeguarding various equipment such as wires, cables, and motors. The operation of a megohmmeter involves the application of a high voltage to the insulator being tested, followed by the precise measurement of the ensuing electric current. The insulator’s resistance inversely correlates with the current flow, meaning that the higher the resistance, the lower the current. Megohmmeters serve as indispensable tools in assessing and ensuring the integrity of insulating materials within electrical systems.

What Are Megohmmeters Used For?

The megohmmeter is a versatile tool used in industries such as energy, aerospace, and automotive that has many applications. It is used in measuring the insulation resistance of wires, cables, and motors, ensuring that insulation remains in optimal condition to prevent electrical leakage. In troubleshooting electrical problems, the megohmmeter serves as a precise diagnostic instrument, aiding in the identification of problematic components within a system. Additionally, its predictive capabilities are employed to monitor insulation over time, allowing for the anticipation of potential equipment failures. This proactive approach is pivotal in preventing downtime, enhancing overall system reliability, and mitigating safety risks associated with electrical malfunctions. In summary, the megohmmeter contributes significantly to both diagnostic and predictive aspects in the maintenance of electrical systems.