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4.0 Configuration Switch Settings
LED
Switch 3
LED Enabled = 3 ON
LED Disabled = 3 OFF
Sensitivity:
The DS936 permits selection of response sensitivity modes depending on the type of
coverage desired and the installation environment.
• Standard (STD): Least sensitive setting to environmental extremes, but requires the
largest amount of intruder motion to achieve an alarm.
• Intermediate (INT): Recommended setting for most installations. Use in locations
where an intruder is only expected to cover a small portion of the protected area.
Tolerates normal environments on this setting.
• High: Fast response to intruder signals. For use only in quiet environments where
thermal and illumination transients are not anticipated. If both switches 1 and 2 are
ON, the detector defaults to High Sensitivity.
NOTE:
Although the sensitivity modes provide different degrees of tolerance to
environmentally caused alarms, the installer should assure peak
background noise voltage readings do not exceed ±0.2 VDC.
LED Operation:
If viewing of the walk test/alarm LED is not desired after the initial installation, the LED
may be disabled by placing configuration switch 3 in the OFF position.
5.0 Set Up And Walk Testing
• Apply power to the unit.
• Wait at least two minutes, after applying power, to start walk
tests.
NOTE: Walk testing should be done across the coverage
pattern.
• The edge of the coverage is determined by activation of the
alarm LED. This will change depending upon the sensitivity
switch settings.
• Walk test the unit from all directions to determine
the boundaries.
• The pattern may be adjusted ±15° by rotating the
lens. Insert the blade of a small screwdriver into the
slot on the lens and gently slide the lens in the
desired direction.
© 2004 Bosch Security Systems
130 Perinton Parkway, Fairport, New York, USA 14450-9199
Customer Service: (800) 289-0096; Technical Support: (888) 886-6189
Sensitivity
Switches 1 & 2
High
= 1 ON 2 OFF
Int.
= 1 OFF 2 OFF
Std.
= 1 OFF 2 ON
1 2 3
O
ON
N
OFF
6.0 Final Test
NOTE:
Meter readings are very important in determining
background disturbance levels and catch margin
sensitivity.
• Connect a 20,000 ohm/volt (or greater) DC VOM to the
Background Noise Voltage connector pins as shown.
Set meter scale for about 5 VDC. Route meter wiring
through the slot in the base. (Use of the TC6000 is
recommended, but is not essential for meter use.)
• Replace the cover assembly.
• The base reference level for reading background noise or target voltages is
approximately 2 VDC. Installations in quiet environments, therefore, will result in a
steady meter reading between 1.8 and 2.2 VDC.
Voltage changes greater than 0.75 VDC from the reference level are desirable for
good catch performance. If changes are less than plus or minus 0.75 VDC, the
device may fail to respond at this distance if the temperature difference between the
intruder and the background is very small.
• 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 voltage for at least three minutes.
DS936 readings should not deviate from the reference level more than ±0.2 VDC.
For readings outside these limits, eliminate the cause, re-point the unit slightly, or
mask off the effected zones.
7.0 Other Information
Maintenance:
At least once a year the range and coverage should be checked in accordance with
Section 5.0 - Setup and Walk Testing.
To ensure continued daily operation, the end user should be instructed to walk through
the outer edge of the coverage pattern. This ensures an alarm output prior to arming the
system.
Standard Pattern
8.0 Coverage
4.5
3
1.5
15
10
5
0
5
10
15
15
10
5
Side View
4.5
3
1.5
0
8
10
12
15
10
5
TC6000
Top View
Meters
0
1.5
3
4.5
4.5
3
1.5
0
1.5
3
4.5
0
5
10
15
Feet
Meters
0
1.5
3
4.5
2.4
3.0
3.6
0
5
10
15
Feet
DS936 Installation Instructions
P/N: 23192H
WHITE
RED
BLACK
02/04
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