Technisches
Manual
Weather
station
SCN
‐
WS3HW.01
MDT technologies GmbH •
51766 Engelskirchen • Papiermühle 1
Tel.: +49-2263-880 • Fax: +49-2263-4588 • knx@mdt.de • www.mdt.de
13
The
brightness
sensors
have
their
area
of
application
at
the
control
of
clouding
units
and
the
facade
control.
Therefore
two
tresholds
can
be
parameterized
and
a
faceade
control
can
be
activated.
For
activating
the
second
threshold
and
the
facade
control,
the
first
threshold
must
be
activated.
For
parameterizing
the
brightness
values,
it
is
useful
to
know
some
popular
brightness
values.
These
are
shown
at
the
cart
below.
Attention
should
be
paid
to
that
the
measured
values
depend
to
the
place
of
installation:
Surfaces
illuminated
by
Approximated
illuminance
Bright
day
of
sun
100.000
lx
Clouded
summer
day
20.000
lx
In
the
shadow
at
a
summer
day
10.000
lx
Clouded
winter
day
3.500
lx
Office/Room
building
lights
500
lx
Overhead
lightning
100
lx
Street
lightning
10
lx
Full
moon
night
0,25
lx
Starlit
night
(new
moon)
0,001
lx
Clouded
night
without
moon
and
other
extraneous
lights
0,00013
lx
Chart
5:
Intensity
of
illumination
The
following
chart
shows
the
relevant
communication
objects
for
the
brightness
sensors:
Number
Name
Function
Length
Usage
0
Brightness
East
Measured
value
2
Byte
Display
of
the
measured
value
17
Brightness
South
Measured
value
2
Byte
Display
of
the
measured
value
34
Brightness
West
Measured
value
2
Byte
Display
of
the
measured
value
Chart
6:
Communication
objects
brightness
sensor