Contact Resistance Measurement Kit
The LRM-10™ is a lightweight and portable micro-ohmmeter designed to measure very low resistances from 0.01 µΩ to 200 Ω.
It is the most accurate in its category.
The LRM-10™ uses a four cable measurement method which consists of a Current injecting channels (+I, -I) and a Voltage sensing channel (+V, -V). The instrument accurately measures the current injection while simultaneously senses the voltage drop across the DUT, the resistance is then calculated. The current injection measurement along with high impedance voltage sensing input channel, eliminates the error induced by test lead resistances. The instrument’s microprocessor eliminates gaps, noises & parasite voltages influence on the resistance measurements. Thanks to its unique filtering system, the LRM-10™ can be used in spite of the presence of intense magnetic fields.
Electrical interconnections, such as sockets, switches, circuit breaker contacts, cable joints, battery inter-cell connections and other connection devices, are affected by factors like residual contact force, vibrations, and corrosion. These factors generally succeed in compromising the integrity of contact interfaces, and eventually lead to degradation and failure of all electrical connections. The time-to-failure varies widely depending on the connection types and environment. Failure is always preceded by a significant increase in contact resistance at the electrical interfaces.