DURAG D-LX 200, Manual

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Adjusting the Flame Monitor
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D − LX 200, D − LX 720
Figure 6.4: Flicker frequency setting [Hz] of the flame
For the flame flicker frequency threshold, switch position 0 (zero) means
deactivation of the threshold. The detection of periodic signals is also switched
off.
With a switch position > 0 (zero), a threshold is defined. The flicker frequency
measured at the flame must exceed this threshold to produce a Flame ON
signal (see Figure 6.4).
Example:
If the flicker frequency falls below 150 Hz for switch position A, the Compact
Flame Monitor indicates "Flame OFF" after expiry of the safety time.