How to set a deltec skimmer

I've been helping a friend with there tank. He recently bought a halide fixture 2 mp10s and a deltec mce 600. How the heck do you set the level on these skimmers. It's completely different than the skimmers I'm used to. I can't believe how small the collection cup are on these. Is this skimmer better than the reef octopus nwb 150 he had on the tank before. The octopus didn't go to waste it went to his other tank and replaced a coral life skimmer