Profile: Quarndon Electronics Ltd. is an electronic components distributor. We provide reflow soldering system SEF 540.02. It is microprocessor controlled, and contains 750 stored programs. It is designed for soldering surface mount PCBs. A continuous 250 mm wide belt drives the boards through the system. The required heating profile is generated using infra-red heaters above the PCB, and contact plates below the PCB arranged in 7 separately controlled zones. Up to 750 temperature-profiles, consisting of belt speed, temperature of the contact-plates and IR-heaters, can be stored in battery-backed memory.