Security. Audiophile. Shavano Music Online - Using a Volt Ohm Meter. 7/98 - Jens Moller - A very handy tool for trouble shooting problems is a VOM (Volt Ohm Meter) - also called a Multi-Meter. It can be used to test cables, AC power levels and Batteries. You'll often find yourself out on the road with problems that are causing you grief, but you aren't quite sure why. 2 types of VOMs.