DS778 Installation Instructions
© 2004 Bosch Security Systems
Page 3
6.0 Final Tests
• Connect a DC VOM to the Noise Voltage pins (use TC6000).
• Replace the cover, routing the TC6000 cable through the notch
in the top of the case.
• Set meter scale for about 3.0 VDC.
-
The base reference level for reading
background noise is approximately
2.0 VDC.
-
Installations in quiet environments will
result in a steady reading between
1.9 VDC and 2.1 VDC.
-
Voltage changes greater than 0.75 VDC from the reference
level are desirable for good catch performance.
-
If changes are less than +0.75 VDC, the device may fail to
respond if the temperature between the intruder and the
background is minimal.
• Turn on all heating and cooling sources that would normally be
in operation during times of protection.
• Stand away from the unit and outside the coverage pattern, then
monitor the background noise for at least 3 minutes.
-
Readings should not deviate from the reference level by
more than ±0.15 VDC.
-
For readings outside these limits; eliminate the cause,
re-point the unit slightly, or mask off the affected zones.
7.0 Maintenance
• At least once a year, the range and coverage should be checked
in accordance with the Walk Testing section.
• To ensure continual daily operation, the end user should be
instructed to daily walk through the outer edge of the coverage
pattern. This assures an alarm output prior to arming.
8.0 Coverage Patterns
• Masking Information
Before attempting any masking, be sure the chosen mirror
surface is the correct one (use the Mirror Segment to Pattern
Reference illustration to determine the relationship between
mirror sections and the pattern. When attempting to remove
masking, many adhesives will either destroy the mirror surface
or leave enough residue behind to reduce coverage
performance.
Mirror Segment
to Pattern Reference
View of Front
Polished Surface
A
C
D
E
B
+2
0
-8
-16
+2
0
-8
-16
TC6000
B
W
R
-
+
-
0
10
20
30
40
50
60
80
100
120
140
160
180
200
feet
meters
20
40
60
0
0
0
2.3
2.3
7.5
7.5
0
10
20
30
40
50
60
80
100
120
140
160
180
200
feet
meters
20
40
60
0
2
0
A
B
C
D
E
0
6.5
Side View
Long Range Coverage
Top View
