In this example, the lower voltage indicates resistance in ... a voltage drop test and saw a whopping 0.95 volt drop on the negative battery cable. We improved the situation by adding custom ...

With a four-wire measurement, one pair of wires carries current to the device under test and the other pair of wires measure the voltage drop. If you wonder why that’s better than two probes ...

Feed a known current through the thing you want to measure and read the voltage ... four-wire method. What’s more is, understanding why you want to use the four-wire method is a great example ...