No, you can't use a meter to measure DCC. It also won't hurt the meter, the meter will just give you crazy results. We have meters at the modular club I belong to, and we use DCC sometimes, and there are no problems with them. They still work for DC (thats not saying that anyone actually looks at them, they are usually under a bunch of junk, as the control panel is a VERY useful shelf
). If you need to measure the draw, you can hook up an old power pack, and run the loco on DC, or you can get an RRampmeter from Tony's, they can read DCC volts and amps. What does this loco do that makes you think it sucks the juice? If it is sound equipped, then it probably does, and there probably isn't anything wrong with that, as long as you plan for its power needs, and if you operate at a large home or club or modular layout, that layout has power districts that are designed to accomodate sound locos.