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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
VOMs and some instruments contain meters that can be used for more than one function. These scales are called complex scales. To read a complex scale the user chooses the appropriate scale based on the thnction and the range selected. Figure 2-6 shows a complex scale from a VOM.

If the function selected is resistance, then the top scale is selected. This scale is nonlinear. Notice that the secondary divisions change values across the scale. To determine the reading, the primary divisions on each side of the pointer are noted. The secondary divisions can then be assigned values by counting the number of secondary divisions between the primary marks.
For the meter in Figure 2-6. assume the OHMS function is selected, and the range selected is x 10 ohms. What does the meter indicate for a resistance'Â
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