F350 and FFS30 flame monitoring system

The F350 evaluation unit and the FFS30 flame sensor together form a flame monitoring system for firing systems with one or several burners. It is used in complex firing systems and retrofits, on single- and multi-fuel burners, for combustion chamber monitoring, in power and heating plants, process furnaces and waste incineration plants. The two units communicate over the fail-safe iFSB bus, and the system is SIL3 to DIN EN 61508 parts 1–7. Its fail-safe contact lets it work with any burner control system; the relay output is rated for up to 250 V AC or up to 120 V DC.

FFS30 analyses the flame digitally in the UV and IR ranges and comes as a single sensor or a dual UV/IR sensor. UV-4 (215–360 nm) suits oil, gas, dust and special gases like refinery or blast furnace gas and hydrogen; IR-2 (850–1200 nm) is intended for combustion chamber monitoring; IR-4 (1000–2200 nm) suits oil, gas, coal and dust firing with heavy flue gas recirculation, and yellowish waste gases without UV or with the UV screened. The UVIR-1 dual sensor detects at 215–360 nm in the UV and 850–1700 nm in the IR. Three preselectable operating modes and a self-learning flame ON/OFF function are included.

With a UV-4 or UVIR-1 sensor, FFS30 is available as FFS30 Ex for Ex zones 1 and 21 (Ex d IIC T6 Gb, Ex tb IIIC T80 °C Db) and as FFS30 Ex-II for Ex zones 2 and 22; the IR-2 sensor is not intended for Ex zones. FFS30 operates at -40…+85 °C and F350, housed in plastic with IP20, at -40…+70 °C; higher temperatures are possible with a cooling air housing. F350 is set up on site with the FB30 external user interface or with the remote software, and it can be combined with F300K without difficulty.