NK Guy , Sep 24, 2002; 03:15 a.m.
What are you asking, exactly? Do you want to know how to figure out the correct exposure settings for a scene using an EOS camera?
The internal light meter is hooked into the built-in computer system - you never use it directly as such. Rather you set the camera to a specific exposure mode (fully automated program, fully manual, etc) and the camera goes from there. Consult the manual which came with your camera for more details.
EV stands for exposure value.