Figure 2-3
Figure 2-4
Your kit has a potentiometer that looks similar to this:
Figure 2-5
You vary the wiper position by turning the white screw with a screwdriver.
Measurement of Variable Resistance
Number the terminals 1, 2 and 3 as illustrated in Figure 2-3, and set the potentiometer up so you can measure resistance, as shown in Figure 2-6 below:
Figure 2-6
Measure and record the resistance between terminals 1 and 3 of the potentiometer (the outside terminals).