Figure 9-9.-Digital multimeter.
pointer deflection is controlled by the amount of
battery current passing through the moving coil.
Before measuring the resistance of an unknown
resistor or electrical circuit, the test leads of the
ohmmeter are first shorted together, as shown in
figure 9-11. With the leads shorted, calibrate the
meter for proper operation on the selected range.
Figure 9-10.-Ohmmeter.
Figure 9-11.-Simple ohmmeter circuit.
9-15
