The Bar Code Reader is an optional accessory for the PTT or LTT. It is designed for users that want the ability to scan bar codes on tools and start tool tests automatically. This option reduces set-up time for users with a large number of tool tests stored in the LTT. The Bar Code Reader is powered by the PTT or LTT so no additional power source is required. This feature is designed to use a specific bar code reader, which is modified to operate with the PTT or LTT.