DC Fundamentals Unit 1 – Trainer Familiarization
The base unit contains twenty circuit modification (CM) read relays that modify an existing
circuit. The base unit also contains twelve fault read relays that insert a fault in a circuit. These
circuit faults, used in the troubleshooting unit, provide student training and assessment.
The schematic of each circuit on your trainer is drawn on the circuit board. Standard industrial
components are used on the circuit boards.
NEW TERMS AND WORDS
dc circuits - direct current circuits; a flow of electrons in one direction along an electrical path.
circuits - paths for current to flow.
circuit board - specially constructed board containing many electrical circuits.
power sources - devices that supply electricity to an electrical circuit; also called power supplies.
cells - basic sources of power that produce electricity through chemical action.
schematic - drawing that uses standard symbols to show electrical paths and components.
symbol - a simple representative drawing of a component.
crowbar - a circuit that rapidly shorts the output voltage to ground.
EQUIPMENT REQUIRED
F.A.C.E.T. base unit
DC FUNDAMENTALS circuit board
Multimeter