Lamtec F 200 K User Manual

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Measuring points
Apart from the Adjust function, the measuring points (section 10) of the device can be
used. This allows to continuously measure the unevaluated intensity.
Use a commercial potential-free measuring device, such as a manual multimeter
complying with EN 61010-1 (safe insulation), and having a measuring resistance
> 5 MΩ.
The trigger threshold for the F 200 K is at ≥ 25 mV AC , while the measured sig-
nal voltage can amount to maximally 3 V AC.
To allow an optimal suppression of reflections, the measured values should be
clearly below the specified value of 25 mV AC of the response threshold after burner
switch-off.
Frequency setting
An adaptation to the burner flame can additionally be effected in the F 200 K2 (ex-
proof) as to the lower frequency limit (section 9.2, item 6). This frequency allows no
remote switch-over. Generally, a low frequency limit means a higher availability, how-
ever a reduction of the selectivity.
3 levels are provided for.
The setting (changeover to another frequency range) has always to be carried out for
both processing channels A and B in an identical way.
Moreover, always make sure that only one frequency range in ON position is selected
each time.
Start-up suppression
If on burner start, there are short flame pulses in the set transmission range due to in-
tense background fire and/or adjacent burners, thus likely to cause problems with
burner start ( light emitted by other sources ), a change of start-up suppression ac-
cording to the technological circumstances can be used to suppress the undesired
flame pulses.
The start-up suppression function (refer to section 7.0.8, separately adjustable) allows
to suppress short pulse rates, which may occur on burner start in connection with the
fan operation (pre-ventilation) and background fire. The values can be set between 0
and 100 % at a continuous start-up delay of 1s, i.e. that short pulse rates that may re-
sult in extraneous light signalling during the burner start phase, but don't represent no
continued flame signal, are excluded from evaluation (suppressed) with differently in-
tensive ways. When 0% has been set, the flame detector is activated even on im-
proper flame signals, at a setting of 100% however, an activation requires very proper
and stable flame signals.
In case of improperly starting flames, an excessive start-up suppression impedes a
timely recognition of the flame.
The devices are delivered with start-up suppression of 50 % factory pre-set 50 % and
the
Serv. switch pre-set to the ON position (deactivated).
Carry out resetting according to the requirements as follows:
(cf. the representation of the operational controls in section 10)
- Set the Serv. switch to the OFF position, this allowing to make the pulses visible
during the start-up time via the devices' intensity indicator
- Set the start-up suppression (section 10, item 9) according to the amplitude of the
pulse rates between 0 and 100 %
After completion of the settings and/or optimisation, reset the Serv. switch to the ON
position.

Lamtec F 200 K Specifications

General

Brand	Lamtec
Model	F 200 K
Category	Security Sensors
Language	English