For example, using the Rollei MX-EVS model, photographing with open sky (but not at the beach or with snow) at ASA 50 gives me an EV of 13 on the table. It is late in the afternoon (long shadows), so I subtract 2. 13-2=11, so I move the f/stop and shutter speed so that the mark on the dial is at an EV of 11, lock it in and move the dials to the f/stop and shutter speed combo I want to use.
While I actually never used that feature, I use about the same system now with my Pentax Digital Spot -- I read the "EV" numbers from the deepest shadow I want detail in (say, 4 read in the meter) and then take the reading in the brightest highlight (say, 10), then I figure where I want the shadows.
If I exposed at 4, those shadows would be middle gray, so I decide to expose at 6 (shadows at 4 are now placed in Zone III). I set 6 on the meter's dial and then the last thing I do is decide which combo of f/stop and shutter speed on the dial I will use (granted, the image itself and its need as far as DoF and/or shutter speed is in my head before I even start to meter). Where I metered 10 in the scene now falls on Zone 9 if developed normally.