At the gym, some of the equipment doesn't have the weight listed on the individual weight plates, just numbers. For example, the "Hoist Fitness Systems CL2403 seated leg press" just has numbers for each weight plate, from 1 - 21. Here is a diagram of the actual CL2403 weight stack:
How much weight am I actually lifting when I set the pulley to lift different numbers of weight plates?
How much does each small round "add on weight" weigh (that I can slide over onto the stack when the weights are at rest)? See at the top right of the weight stack:
Will these answers be consistent across all weight lifting equipment, or does it change from manufacturer to manufacturer?
I have searched online and found lots of pictures of equipment, and lots of equipment for sale, but haven't been able to find anything at all on the weight bars and their specifications, let alone anything definitive.
For what it's worth, I primarily use free weights rather than isolation machines. I simply had some upper body muscle soreness the other day and could not trust myself to use anything but lower-body machines that day. I have only a couple of months of consistent gym use under my belt.
Last, you might ask why I want to know? Because I am entering my exercises in a spreadsheet and charting them. I have lost 8 pounds already, without really dieting (besides working to avoid soda and frivolous sweets). Seeing my strength and workouts improve on the chart is motivating. I'd like to enter reasonable values when I do end up using some of the machines.