DURAG D-R 290, Operating Manual

Page: 53 / 202

4 | Product description
D-R 290 53
If the power supply or the purge air fails, the fail-safe shutter of the protective device
will be closed. The control electronics monitors the air flow sensor in order to detect a
failure of the purge air. Integrated maintenance-free supercaps supply the necessary
power to the shutters to close them within approx. 2 seconds. After the failure has
been rectified the fail-safe shutter automatically opens again. A message is output giv­
ing the current status of the shutter. For dimensions see 9.3.5 Dimensional diagram
fail-safe shutter D-SK MA [
}
187]
The control electronics D−SK AE are contained in a compact aluminium housing (col­
our: Traffic blue RAL 5017) with a transparent cover. The front panel is protected by
the transparent cover which can be swung away to the left. The connection terminals
are contained in a separate area within the housing (behind a swing-away cover in the
lower part of the housing). The housing is protected against sprayed water to protec­
tion type IP 65. For the diameter of the attachment holes and attachment dimensions
see 9.3.4 Dimensional diagram of the control electronics D-SK AE [
}
186] .
Applications, Designated use
The Dust and Opacity Monitor is a device for monitoring dust emissions in e.g.:
●
of flue gas, air or process gas
●
in ducts, pipes or flues
●
on ventilation units generally
●
on incineration plants generally
●
on waste, special waste and sewage sludge incineration plants,
●
on cement manufacturing plants
●
on power stations with gas, oil, coal or mixed fuel firing
●
on plants for incineration of biomass
●
Refineries and other petrochemical plants
●
Soot factories, conversion plants, asphalt mixing plants, dust filter plants, …
The Dust Concentration and Opacity Monitor D‑R 290 satisfies the official emission
monitoring for medium to high concentrations (according to the European specifica­
tions and the EPA [
}
195] ).
WARNING
Danger when using other than for the intended application!
Any use other than or beyond the designated use of the of the Dust and Opacity
Monitor can lead to hazardous situations.
There is a risk of personal injury and material damage.
Only ever operate the Dust and Opacity Monitor in compliance with the parameters
stated on the type label and to the parameters listed in the 9.2 D-R 290 technical data
[
}
179] . All specifications in this operating manual must be strictly complied with!
Claims of any kind resulting from incorrect use will not be accepted.
The operating company bears sole liability for all damage caused by use other than in
accordance with the designated use.
The D‑R 290 is a class A product. If used in residential areas devices of this kind of
class can cause radio interferences. In this case the operating company is responsible
to take appropriate measures.
Protective device
Control electronics
housing
4.4