Electronic service technicians work with radio, radar and telecommunications, telemetering, data processing equipment, sound-reproducing equipment, ultrasonic, and computerized equipment. They install, maintain, modify, inspect, test, and repair these systems. They use special electronic instruments and hand tools and consult equipment manuals to diagnose and fix problems.
Instrumentation and control technicians install, maintain, program, test, and repair the instruments that monitor and control processes. For example, they may observe the indicators that monitor temperature and chemical reactions in processing plants, the sensors in burglar and fire alarms, or the control loops and computers used in manufacturing. They must make sure that the equipment used in these facilities meets government and company safety standards.
Relay and instrumentation technicians monitor, test, and adjust Vital Signal Control Relays (VSCR) in transit systems. They must be skilled at CNC programming, interpreting and diagnosing code and power systems, and understanding different types of numerically controlled machines.