Installs, repairs, maintains, and adjusts indicating, recording, telemetering, and controlling instruments and test equipment, used to measure and control variables, such as pressure, flow, temperature, motion, force, and chemical composition, using precision instruments and hand-tools. Have a working knowledge of hydraulics, pneumatics, welding, pumps, piping, power transmission, lubrication, rigging, motors, electronics, controls, power supplies, AC/DC theory, power distribution, computers and PLC's, etc.