9
8
•
Sensitivity (E)
The Busch Watchdog has
three sensitivity level
settings. The standard level
is E. The higher level, E+,
is intended, for example,
for indoor applications,
and level E–, has a reduced
sensitivity for a busy
environment (trees or
bushes).
•
Dusk setting (N)
Definition of the activity of
the device depending on the
ambient brightness in
operating mode N (0.5 to
1000 lux, daylight mode).
•
Test/standard operation
(T/S)
In this operating mode, the
shortest time setting of two
seconds always applies in
the daytime to define the
surveillance zone irrespec-
tive of the set delay time.
After the test phase, the
Watchdog automatically
changes back to the
Standard operating mode.
Connection and settings
The watchdog is connected
with the wall-mounted bracket
and simply screwed onto the
fixing surface. To match the
Busch Watchdog Professional
220/280 and Alarmtech 220
units perfectly to the ambient
conditions, the following
variables are externally
adjustable:
•
Operating modes
With the operating mode
selector, the numerous
functions of the Busch
Watchdog Professional
220/280 and Alarmtech 220
can be selected easily and
clearly.
•
Time setting
Specifies the delay time
during which the light
remains on after the sur-
veillance zone is vacated.
In addition to the exact time
setting, a short-time pulse
( ), for example for actua-
ting an audible alarm, is
issued.
Principle of operation
The delay time of three
minutes and the light level
of 4 lux are fixed.
•
Comfort and
vacation (K-U)
This operating mode
combines the functions of
a movement detector and
those of a conventional
dusk switch. The con-
nected lighting is initially
switched on for 80 minutes
at dusk. Over the next 24
hours, the Busch
Watchdog measures the
ambient light and "learns"
the time of year. The fixed
delay time is then adjusted
accordingly (e.g. extended
in autumn/winter). At the
end of this permanent light
phase, the device reverts
to normal detection.
T/S
E
K-U
E-
E+
30
15
5
1min
10
sek