BFI Automation CFC 200, Original Operating Instructions

Page: 43 / 56

Description
5-1
5 Description
5.1 Type plate
The type plate is located on the back of the device hous-
ing and contains the device type designation and the se-
rial number.
5.2 Functional description
For flame radiation analysis the compact flame controller
is using the integral method in the respective spectral
range.
After pre-amplification, the undesirable unmodulated light
portion is removed from the output signal of the wear-free
detector. The subsequent sensitivity setting permits an at-
tenuation of the signal for adaption to the firing conditions.
The downstream bandpass ensures that only the typical
flame radiation modulation of the primary combustion
zone is evaluated. This allows extraneous light signals
from neighbouring burners to be distinguished from the
monitored flame.
Further function groups include i.a. the signal processing
for the
dynamic monitor channel
that continuously moni-
tors the fault-free state of the device.
A part of component defect results in the immediate
switch-OFF of the flame relay that represents a floating
changeover contact for processing in the burner control-
ler.
The switching status is additionally indicated by a yellow
LED on the rear side of the device behind the perspex
panel.
For optimum adjustment of the compact flame controller,
the flame intensity can be read off directly at the device by
means of the pulsating green LED. A current output with
0(4) to 20 mA is available for visualisation or remote dis-
play.
The safety switch-OFF time that depends on the fuels to
be monitored is set at the manufacturer's works to 1 sec-
ond. Longer switch-OFF times can be set, if required.