Technology is rapidly changing our world. Electrical and electronic circuitry seems to permeate everything, and continues to get more complex and smaller in size. Servicing, repairing, and installing this complex equipment requires diagnostic tools that provide accurate information.
Let's begin by explaining what a DMM is. A DMM is simply an electronic tape measure for making electrical measurements. It may have any number of special features, but mainly a DMM measures volts, ohms, and amperes.