Description
5-1
5 Description
5.1 Functional description
Flame amplifier, type 3001, evaluates the pulses of the
flame scanner and uses the information to activate the
flame relay in case of an adequate flame signal. The in-
tensity of the flame signal is indicated by means of the
bar-graph displays on the front panel. If all bar-graphs are
lit, this corresponds to an output signal of 20 mA. In addi-
tion, the flame amplifier generates all signals which are
required for self-tests.
The self-test and failsafe flame amplifier 3001D consists
of two separate signal processing channels of different
design. Internal and external disturbances of any kind
lead to immediate actuation of the safety logic.
Two independent monitoring levels (time I, time II) can be
selected by means of external control signals. Every level
is described by its sensitivity setting and switch-OFF time.
A fuel or load related optimisation of flame monitoring is
thus ensured in an easy way. The connection of a second
flame scanner in parallel or alternating operation is possi-
ble.
The output signal of the flame scanner reaches the sensi-
tivity controllers in the form of a pulse telegram through a
filter and pulse shaper stage. Two rotary switches per
level are available, with which the requested signal can be
enhanced. The flame signal is distributed to three different
function channels.
• Measurement channel (M)
• Monitor channel (RM)
• Evaluation channel (RF)
To Next Page
Loading...