Legrand CSD1000 - Manual (Page 3)

PLACEMENT GUIDELINES
Depending upon obstacles such as furniture or partitions, the area of coverage may
be less or more than the sensing distances shown in the coverage pattern. This must
be considered when planning the number of sensors and their placement. It is also
recommended to place the sensors 4 to 6 feet away from air supply ducts.
Mount the sensor to the ceiling (see “mounting the sensor”). The CSD1000 is
designed for a ceiling height of about 8-10 feet. Mounting above or below this range
will significantly affect the coverage patterns. As a general rule, each occupant
should be able to clearly view the sensor.
Masking the PIR Lens: Opaque adhesive tape is supplied so that sections of the PIR
lens can be masked. This restricts the sensor’s view and allows you to eliminate
PIR coverage in unwanted areas such as hallways outside of the desired coverage
area. Since masking removes bands of coverage, remember to take this into
account when troubleshooting coverage problems. The Ultrasonic coverage cannot
be masked, but you can adjust its sensitivity to reduce the coverage area.
Open Office Area Coverage: To get complete coverage in an open office area, install
multiple sensors so that there is approximately 20% overlap with each adjacent
sensor’s ultrasonic coverage area.
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Ultrasonic
Coverage
32 ft
(10 m)
PIR
Coverage
36 ft
(11 m)
20%
Ultrasonic
Overlap