DS820 Series Installation Instructions © 2011 Bosch Security Systems, Inc. Page 3
7.2 Establishing Microwave Coverage
NOTE: It is important to wait one minute after removing/replacing
the cover so the microwave portion of the detector can
settle, and to wait at least ten seconds between the
following walk testing procedures.
• The tri-color LED should be OFF before walk testing.
• Walk test across the pattern at the intended coverage’s
farthest end. Start walking from outside the intended
protection area and observe the tri-color LED. The edge of the
microwave pattern is determined by the first yellow, microwave
activation of the LED (or the first red activation if the green PIR
LED activates first).
• If adequate range can not be reached, increase the Microwave
Range Adjust slightly. Continue walk testing (waiting one
minute after removing/replacing the cover) and adjusting the
range until the farthest edge of desired coverage has been
accurately placed.
NOTE: Do not adjust the microwave range higher than required.
Doing so will enable the detector to catch movement
outside of the intended coverage pattern.
• Walk test the unit from all directions to determine all the
Microwave pattern boundaries. Wait at least ten seconds
between walk tests.
7.3 Establishing Detector Coverage
• The tri-color LED should be OFF before walk testing.
• Walk test the unit from all directions to determine the detection
boundaries. A detector alarm is signaled by the first red
activation of the tri-color LED after an initial green or yellow
activation.
8.0 Supervision Features
The supervision features function as follows:
• PIR/Microwave: The complete circuit operation of these
subsystems is checked approximately every 12 hours. If the
PIR or MW subsystem fails, the tri-color LED will flash red 4
times per cycle and the unit should be replaced.
• Default: If the microwave subsystem fails, the detector will
default to PIR technology protection. The PIR signal sensitivity
will automatically change from INT to STD.
9.0 Maintenance
At least once a year, the range and coverage should be verified. To
ensure continual daily operation, the end user should be instructed
to walk through the far end of the coverage pattern. This ensures
an alarm output prior to arming the system.
10.0 Coverage Patterns
The protected coverage area is where the microwave and PIR
patterns overlap.
An optional Look Down lens is located under the detector. This
lens must be unmasked before it is operational. Use caution to
remove the black mask only. Do not attempt to remove the white
lens assembly. The Look Down lens is
not recommended for
installations containing pets or small animals. The Look Down
zone is shown in black on the Coverage Pattern drawings.
0
0
M
L
A
B
D
F
H
J
X
T
P
I
Z
G
C
N
R
V
W
S
O
E
K
Q
U
Y
3
0
5
1.6Meters
TOP VIEW
10
10
5
05 10Feet
15 20
1.5
1.5
3
3.2
4.8
6.4
0
0
2
-9°
V-Y
Z
Meters 1.6
3.2
4.8
6.4
3
20151050Feet
0
10
6½
R-U
Remove masking for Look Down Zone.
SIDE VIEW
10.1 Pattern Masking
The PIR coverage pattern may be masked using masking tape or
electrical tape on the inside of the lens. Always walk test for the
desired coverage after masking.
Grooved side of
DS820 Lens
ABCDEFGHIJKLM
VNRWSOZPT
XUQ Y
NOTE: Masking only eliminates the PIR portion of the coverage
and has no effect on the microwave pattern.
To Next Page
Loading...
