DURAG D-LX 200, Руководство пользователя

Страница: 53 / 116

Adjusting the Flame Monitor
D − LX 200, D − LX 720
53
6 Adjusting the Flame Monitor
In this chapter we will explain how to use the D − LX 200, D − LX 720. We will
explain the setting options for different switches and provide information on
settings that must be made before commissioning to enable sensible use of
the system.
In order to make the required settings with the necessary sensitivity, we
recommend using the evaluation software D
− LX 200 InformationCentre. This
will enable you to read out the current system measuring data in real time on
PC or Notebook and make the effects of the settings you have made visible
immediately.
You can find information on the evaluation software in chapter 7 from page 69.
If you have any further questions on the evaluation software, please use our
Support & Service. The addresses and telephone numbers for your DURAG
GmbH representative can be found on page 115 (DURAG GROUP company
addresses).
WARNING
Danger from electrical equipment
If electrical protection is not guaranteed in the system by protective extra-low
voltage (PELV), the flame monitor must be disconnected from the power
source BEFORE removing the hood.
Even if PELV is present, we recommend making the settings with the flame
monitor disconnected from the power source, in order to prevent damage to
equipment.
CAUTION
Damage to electronic components through
electrostatic discharge (ESD)
DURAG devices are protected from uncontrolled electrostatic discharge (ESD)
during closed operation. If the device is opened (e.g. for service or
maintenance works), then suitable ESD protective measures must be
undertaken beforehand.
If the printed circuit boards have become loose after removing the hood, you
must ensure that the plug connectors on the printed circuit boards are not
misaligned when reassembled. This could result in severe damage to the
D
− LX 200, D − LX 720.
In order to guarantee failsafety, the flame monitor has a consistent dual-
channel design. The two microprocessor systems control all functions and self-
checks, and monitor all safety-relevant timing sequences. The input and output
states are independently checked and compared by the two processors. Only
if they agree is operation continued.
The switches described below are provided separately for each channel, i.e.
they are present twice (designated Chan. 1 and Chan. 2 below). This ensures
that the self-checks also detect abnormal behaviour or a defect in the switch
and trigger an error shutdown. Therefore, if changes are made to the setting
both switches must always (simultaneously, within 8s) be switched and moved
to the same position.
The D − LX 200, D − LX 720 has thresholds for the intensity (Intens.) and flame
flicker frequency (Freq.). The thresholds are operated by means of rotary
switches.