At our company we sell Metrel equipment such as the MI 3252 contact micro-ohmmeter, 100 A or 200 A, a portable low-resistance meter (ohmmeter) used to measure low contact resistances of circuit breakers, switches and busbar connections using a test current of 100 mA to 200 A.
A contact micrometer is a high-precision measuring tool used to measure small dimensions, especially in the range of millimeters or fractions of a millimeter, with great accuracy. It is mainly used in laboratories, precision workshops and in the manufacture of mechanical parts where high-precision measurement is required.
A contact resistance micro-ohmmeter is an instrument used to measure contact resistance in electrical connections. This contact resistance is the resistance present at the junction points between two conductive materials, such as the terminals of a switch, a connector or a relay. Although in an ideal connection the resistance should be zero, in practice there is always some resistance due to imperfections in the contact surfaces or wear of the materials.
Main functions:
Contact resistance measurement: The contact resistance micro-ohmmeter measures the resistance of connection points, which can affect the performance and reliability of the electrical system. High contact resistance can generate heat and, in extreme cases, can cause failures in the electrical system.
Detection of bad connections: It can help identify faulty or corroded connections, which can cause malfunction of electrical equipment or even short circuits.
Preventive maintenance: It is used in predictive maintenance to make sure that connections in electrical systems do not show excessive resistance, which could be a sign that the connection is damaged or deteriorating.
Quality control in manufacturing: In the production of electrical devices, this type of measurement is useful for making sure that connections and welds are made properly and do not have excessively high contact resistances, which could affect the performance of the final product.
How it works:
The contact resistance micro-ohmmeter generally passes a current through the contact joints and measures the resulting voltage drop. Based on this measurement, the contact resistance is calculated using Ohm’s law.
This instrument is essential for making sure that electrical connections are as efficient as possible, minimizing energy losses and preventing overheating or failures.
