I use one myself. And just checked my rice cooker and the measurements are 0.5, 1, 1.5, 2 cups
Anyways, what I usually do is:
-Make sure rice cooker is set to white rice
-Rinse white rice till clear
-After rinsing, make sure water is properly matched to the corresponding line
-Wipe the cooking pan till dry
-Put pan and cooker, press start
-In the end, you'll hear some kind of tone indicating its finished
-I usually fluff the rice with the paddle once its finished cooking
-Once finished, press reset