User's Manual
DS720i Installation Guide
© 2000 Detection Systems, Inc. All rights reserved.
Page 6
10.0 Coverage Patterns
The protected coverage area is where the microwave and PIR
patterns overlap.
0A90 Standard Broad Coverage (optional mirror - included)
OA90
A
B C D E
G H
F I J
K
feet
Top View
90
0
70
18
9
3
3
18
9
A
B
C
D
E
G
H
J
0
24
0 meters
°
40
I
F
K
50
30
10
10
30
50
70
30 50 70
feet
0 meters
0
Side View
10
0
24
90
3
0
A - E
F - H
I, J
K
705030
36
OA120
A
B
E
F
D G H
I
C
0 meters
Top View
OA120 Long Range Coverage (Optional)
feet
20
10
0
10
20
6
3
0
3
6
0 120
I
G
H
D
E
F
A
B
C
20 40 60 80 100
Side View
feet
10
7.5
0
0 meters
0
36
3
0
120
A - C
D - F
G - H
I
20 40 60 80 100
OA300 Long Range Coverage (pre-installed)
OA300
A
B
C
D
E
feet
0 meters
0
Top View
7.5
0.0
7.5
300
2.3
2.3
91.4
50 100 150 200
A
B
DE
C
250
Side View
feet
0 meters
0
76
300
3.1
0
10
0
A
B
C
D
E
50 100 150 200 250
7.5
NOTE: Use a bubble level on the front of the unit to check for
proper positioning and alignment.
8.0 Meter Tests
An analog or digital volt meter is recommended. Use of the
TC6000 is recommended, but is not essential for meter use. Either
outside connector pin of the TC6000 may be used as common (-).
8.1 PIR Meter Readings
Connect the meter to the PIR Noise Voltage Pins. With no target
motion in the pattern, read the voltage. The base reference level for
PIR background is approximately 1.0 VDC. Installations in quiet
environments, therefore, should result in a steady meter reading
between 0.9 and 1.1 VDC.
Walk test across the farthest edge of the coverage pattern. Make
sure the detector's cover is on.
Voltage changes greater than +0.75 VDC from the reference level
during walk tests are desirable. If changes are less than 0.75 VDC,
the detector may fail to respond at this far a distance if the
temperature difference between the intruder and the background is
minimal. Try adjusting the unit up and down to maximize the voltage
change during walk tests.
Turn on all heating/cooling sources that will be in operation during
the times of protection. Stand away from the unit and outside the
protection pattern, then monitor background noise for at least 3
minutes.
Readings should not deviate more than 0.15 VDC from the
reference level. If they do, eliminate the cause or reposition the
pattern (observe readings while turning on and turning off these
sources as well as during the three minute interval).
8.2 Microwave Meter Readings
Connect the meter to the Microwave (mW) Noise Voltage Pins.
With no target motion in the pattern, read the voltage. The
background noise voltage should be steady, and should not exceed
1.0 VDC. If it does, the cause of the disturbance should be found
and eliminated.
Microwaves penetrate nonmetallic surfaces.
Movement on the other side of walls and doors viewed
by the detector could cause unexpected background
noise readings.
9.0 Other Information
9.1 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.
9.2 Pattern Masking
Refer to the mirror module and pattern drawings in Section 10.0 for
masking.
Many adhesives will either destroy the mirror surface
or leave enough surface residue behind to reduce
coverage performance. Be sure to clean the mirror
surface with a mild window cleaning solution after
masking removal.
9.3 FCC Compliance Notice
This device complies with Part 15 of the FCC Rules and with RSS-
210 of Industry and Science Canada. Operation is subject to the
following two conditions: (1) this device may not cause harmful
interference, and (2) this device must accept any interference that
may cause undesirable operation.