DURAG D-R 290, Руководство по эксплуатации

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5 | Installation
66 D-R 290
Preconditions for operation
Check that the following preconditions for operation of the D−R 290 Dust Concentra­
tion and Opacity Monitor are satisfied:
(Based on the following checklist, the suitability of the device can quickly and easily be
determined).
Checklist: Requirements for operating the D−R 290
Are the flue gas temperatures above
dewpoint, so that the gas does not dis­
solve in condensate within the duct?
If the gas temperature regularly falls be­
low dewpoint, the D−R 290 is unsuita­
ble for this application.
❑
Does the measuring point lie in an ex­
plosion hazard area, or is it intended to
measure explosive gas mixtures?
Only the appropriate optional version of
the D−R 290 system is suitable for this
application.
❑
How large is the measurement distance
at the measurement location?
Refer to the table on page 52 and se­
lect the appropriate system.
❑
What measurement range is required? For this, determine the dust concentra­
tion to be expected, as well as the limit
value (if any) that should be monitored.
❑
What is the wall thickness of the duct at
the measuring point?
Refer to the table on page 52 and se­
lect the appropriate system.
❑
What is the gauge pressure in the
measurement duct?
The maximum gauge pressure for the
application of the standard blower is ap­
proximately 20 hPa.
❑
Is suitable purge air available? The fresh air sucked in by the blower
for the purge air must be free of dust
and oil and have a temperature of -20
to +40 °C.
❑
Is the measurement location outdoors? In this case a weather protection cover
should be fitted to protect the compo­
nents that are located outdoors (see
page 35 ff).
❑
Is the planned installation location safe
for service personnel?
The working platform should be approx­
imately 1.5 m below the measurement
opening. All parts of the measuring sys­
tem must be accessible without danger.
Observe the valid country-specific regu­
lations on accident prevention.
❑
Is there sufficient space available to
carry out maintenance work on the
components?
Virtually all system components require
the cover to be swung open for access,
and sufficient space must be provided
for this at the hinge side (see Fig. 5.3
and 9.3.4 Dimensional diagram of the
control electronics D-SK AE [
}
186] ).
❑
Table 5.1: Preconditions for operation
Instructions for planning the electrical connections to the system
The electrical connection of the measuring system depends on the composition of the
system
●
in the universal operation unit D‑ISC 100 (see also the applicable operating man­
ual) or
5.2.1
5.2.2