© Bosch Security Systems, Inc. 2011
130 Perinton Parkway, Fairport, New York, USA 14450
www.boschsecurity.com
3/11
DS938Z Installation Guide
P/N: F01U089246-03 Page 4
The supervision features function as follows:
Supervision Display Chart
LED
ON
2 Flashes
4 Flashes
CAUSE
Unit Alarm
Motion Monitor Timeout
PIR Self-test Failure
•
PIR:
The operation of the PIR is electronically checked
approximately every 12 hours. If the PIR fails, the Alarm/Test
LED will flash four times and the Trouble Output will activate.
•
Motion Monitor Supervision:
This feature verifies that the
detector has a clear view of the detection area and has not been
blocked. When selected using switches S4 and S5, a
supervision timer is activated. A trouble condition will be
indicated if the detector has not alarmed at least once during
the selected time period (this feature can be disabled by placing
both switches in the Off position). The time period selected
should be long enough to allow adequate time for holiday
weekends.
Refer to Section 6.0 (Configuration Switch Settings) for proper
switch settings.
If the time period selected has elapsed from the last alarm, the
LED will flash two times and the Trouble Output will activate.
Setting the Motion Monitor timer to shorter periods can be used
to force a protection walk test of remotely located zones.
It is recommended that the 30 day timer be selected. This
verifies that the unit is operational and avoids nuisance trouble
conditions caused by holidays, vacations, etc.
11.0 Other Information
11.1 Anti-vandal Tie-down
• After the cover has been installed and twisted into place, the
entire assembly can be secured together using the supplied
anti-vandal screws. There are two of them; one for each side
(see drawings on page 1 for the location of the screw holes).
11.2 Anti-tamper Screws for EN50131 Applications
• After the enclosure assembly has been installed to the mount-
ing base, the entire assembly can be secured together using
the supplied anti-tamper screws. The anti-tamper screws are
required for EN50131 applications. There are two of them; one
for each side (see drawings on page 1 for the location of the
screw holes).
11.3 Optical Module Masking
• Peel-off masks are provided with the unit for each segment of
the optical module to allow for customized coverage, or to block
out areas of objects that may cause thermal disturbances. The
mask is self-adhesive and pre-cut in the shape of the optical
module.
• To block out a particular zone or group of zones, peel off a
section of the mask that corresponds to the appropriate zone,
and stick it on the mirror segment. Use Section 13.0 (DS938Z
Mirror Module to Pattern Reference) to identify mirror segments
and zones.
11.4 Maintenance
• At least once a year, the range and coverage should be checked
according to Sections 7.0 and 8.0 (Setup and Walk Testing and
Final Tests).
• To ensure continued daily operation, the end user should be
instructed to daily walk through the far end of the coverage
pattern. This assures an alarm output prior to arming the
system.
11.5 Reading Bosch Security Systems, Inc. Product Date Codes
For Product Date Code Information. refer to the Bosch Security
Systems, Inc. Web site at: http://www.boschsecurity.com/
datecodes.
12.0 Typical Placements to Achieve Coverage
13.0 Optical Masking to Avoid Environmental Problems
3
2
1
1
2
3
4
5
BASEBOARD HEAT
AR8-13
4
3
2
1
5
4 3 2 1
MASK 3
SECTORS
AR8-13
4
3
2
1
5
4 3 2 1
MASK 15
SECTORS
WINDOW
1
1
2
3
4
5
14.0 DS938Z Mirror Module to Pattern Reference
M-4
AR8-13
D
4
3
2
1
4 3
1
2
5
A
B
P
C
E
F
G
H
I
J
N
O
K
L
M
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
TOP VIEW
M-3
M-2
M-1
E-1
E-2
E-3
E-4
5
SIDE VIEW
NOTE:
The location of the zone to be masked depends on the position of
the detector. Therefore, determine the mirror surface to be
masked before removing the mirror from the detector. When
replacing the mirror, make sure it is facing the same direction as
before it was removed.
Before attempting any masking, be sure the chosen mirror
surface is the correct one. When attempting to remove any
masking, many adhesives will either destroy the mirror surface or
leave enough residue behind to reduce coverage performance.
When disabling the look-down segment, do not mask segment 5
directly as this will disable the entire detector. Instead, mask the
segment on the dome directly below segment 5.
Avoid soiling or leaving fingerprints on the mirror surfaces.
Should they become soiled or otherwise marked, they can be
cleaned using a soft, clean cloth and any commonly available mild
window cleaner.
Drawings are not to scale and are intended as
pattern identifiers only.
