I want to determine the amperage one of my locos is drawing as it seems to require a lot more juice to run than my other locos. I'm operating on a D'trax Zephyr. I have a digital volt/amp meter. Can I connect it just like I would if measuring amperage on straight DC..?? I thought I'd ask before letting the smoke out of my meter...Any help would be most appreciated. Thanks for any help you may provide.