The multimeter contains circuitry that allows
measurements. Work with one hand whenever
it to be a voltmeter, an ammeter, or an ohmmeter.
The VOM does have two disadvantages--it
can load the circuit under test, and the meter
movement is easy to damage because of improper
The process of fault detection often leads
beyond visual inspection and power checks. Use
a voltmeter to find out if a power circuit is deliver-
Two common multimeter are the Simpson
260 and the newer digital model Fluke 8100A. See
ing power to the proper place. However, the
figures 9-8 and 9-9.
ohmmeter is a better instrument for identifying
the problem. With the ohmmeter, you can find
values. With schematics you can trace circuits
meter is shown in figure 9-10. The ohmmeter's
until you isolate the trouble.
Figure 9-8.-Standard multimeter.