GD1 Page 10 of 76 850-816926-EN R06
2.2. Positioning
Deciding on how the GD1 detectors should be placed at the site is discussed in section
10.3. During installation the detector should be positioned according to the following
points:
• Check that there is a free line of sight between the TX and RX.
• The measuring path should be horizontal.
• Avoid that the measuring path is blocked by temporary scaffolding, parked cars,
high traffic and moving structures.
• The detector should be attached to a mechanically rigid structure.
• The GD1 should be positioned as to avoid more than one TX transmitting into a RX.
Failing to do this can lead to interference between the detectors and false alarms.
• The transmitter and receiver units are to be fitted perpendicular to the measuring
path, within ± 20 degrees.
2.3. Mounting
The GD1 Transmitter and Receiver system assemblies are delivered on a 6mm (1/4")
universal mounting plate suitable for most mounting situations. See figure below for
general dimensions (mm).
The transmitter and receiver units are to be mounted perpendicular to the measuring path,
within ± 20 degrees.
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