Possess the ability to understand the operation of basic electric/electronic test equipment (DC power supplies, milliamp calibrators, millivolt calibrators, multimeters, signal sources, function generators, oscilloscopes, decade boxes, Wheatstone bridges, impedance testers and frequency generators); calibration procedures for electric and electronic transmitters, controllers and control valve actuators; bench repair of various electric and electronic instruments and components (circuit boards, power supplies, relays, receiver and transmitter elements). Understand the terminology (PSIG, PSIA, supply air, instrument air, signal); components (links, levers, flapper or baffle, nozzle, relay, vents, filters); and pneumatic circuitry.