Due to the high current bus bars and terminal connections carry, their junctions are subjected to high amounts of electrical stress. This can cause the junctions to corrode and weaken. There are times that the damage isn’t visible and the junction appears to be fine. That’s why it is important to test them to ensure that they are working at maximum efficiency. Regular testing allows you to find internal problems that are just starting. You can then recondition the electrical components to avoid future problems.
The Vanguard Auto-Ohm 100 100A Micro-Ohmmeter is a reliable tool for testing the reliability of terminal and bus bar junctions. It can accurately measure resistance from 1 μΩ up to 300 mΩ. You can be sure that your measurements are accurate as this uses a Kelvin Bridge input to offset the lead resistance. This Digital Low Resistance ohmmeter can put out test currents ranging from 10 Amperes up to 100 Amperes. Its internal memory lets you store 3 most recent measurements as reference.