BFI Automation 3016, Original Operating Instructions

Page: 44 / 56

Operation of the flame amplifier
6-2
6.3 Initial operation of the flame amplifier
The flame amplifier provides the flame scanner with oper-
ating voltage and the self test pulse, and ensures the
evaluation of the flame scanner signals. All safety-related
functions are carried out by the self-checking flame ampli-
fier. After correct installation and wiring, the system is op-
erational immediately. The respective status indicator
(green LED) lights up at the slide-in power supply unit
(optional, type 3002) and on the flame amplifier. The
“Flame” indicator (yellow LED), “Failure” (red LED) as well
as the bar graph indicator for the intensity are off.
After correct detection of the flame to be monitored, the
“Flame” LED has to be lit. This LED has to be allocated to
the "Flame on" and "Flame off" safety circuit. The safety
circuit is connected by means of the pin connectors c28,
a28 and c30. The flame intensity is displayed by a bar-
graph display. One bar represents 2.0 mA (0 - 20 mA) or
1.6 mA (4 - 20 mA).
The flame intensity indicator must be in the range be-
tween 50% and 100% !
If the output signal is lower than 50 %, monitoring may
become instable. The flame relay is switched off at the
chosen sensitivity (see table 5.4).
6.4 Factory setting of the flame amplifier
All sensitivity settings have set to the highest value (rotary
switch = F).
The safety switch-OFF time has been set to 400ms
(S2=4).
The sensitivity level I is active (S1.1 is OFF).
S1.2 has no function.
Error Hold is not active (S1.3 is OFF).
The analogue output has been set to 4 - 20 mA (S1.4 is
OFF).