PC Hardware A Beginner’s Guide

(^314) PC Hardware: A Beginner’s Guide
electricity, but for most technicians, a multimeter, like the one shown in Figure 14-2, also
called a digital multimeter (DMM) or a digital voltage meter (DVM), is the best choice
because it combines several measuring tools into a single device.
A digital multimeter is typically a rugged, handheld electronic device that measures
volts and amps and checks diodes. They are usually battery operated and come in a rub-
berizedcasetoprotectthemfrominevitabledrops.Thereareusuallytwoprobesattached
tothemeter,aredandablack,thatareusedtomakecontactwiththeitemsbeingtested.
Figure 14-1. An open and closed circuit