The handheld TS-420 Test Set is purpose-built for evacuation slide lighting systems, and is approved by both Air Cruisers and Goodrich for use with their evacuation slides. It combines the ability to check the entire slide lighting system as well as the individual battery and light harness components. It includes a digital voltmeter with built-in selectable load bank and a digital ammeter with a built-in 5VDC regulated power supply. A 20 second timer on the ammeter function provides for a hands-free walk around check of the system. All of these features are offered at a fraction of the cost of the competitive TU-14 unit.