- 5 -
3.3. Detector Positioning In Atrium.
If the detector is to be placed in an atrium, or near glass/polished surfaces, the prism(s) should be offset from
the central line of sight (approximately 300mm), and angled back to the beam detector. This can be either on
the vertical or horizontal axis. This will reduce the amount of spurious returned signal from the glass/polished
surfaces. The reflected signal from the prism(s) will be returned to the detector in the normal way.
4. Installation.
Pre-installation at Ground Level.
Confirm that all parts have been supplied as listed in the parts list. See page 12.
Select the required alarm threshold using switches 3 and 4 (See fig. 4 page 11 for switch configuration
settings). The factory default setting is 35% this should be adequate for most environments, if the Detector is to
be installed into an exceptionally dirty environment change the threshold to 50%.
Switch 1 selects latching or auto reset for the alarm relay. Auto reset is the factory default setting. See Fig.4 for
setting options.
Using the mode switch at the back of the unit, (See fig. 4 page 11) select Prism Targeting Mode (Switch will be
in its upper position).
The Detector Head Assembly is now ready for installation. If switches 1 to 4 require resetting after installation, a
power down reset is required (entering into Prism Targeting/Alignment Mode can also be used as a reset).
4.1. Detector Head Assembly Installation.
Remove the outer cover before installation; this is only to prevent the cover becoming dislodged during
handling.
Do not mount on plasterboard, cladded walls, wood or similar materials, as these surfaces do, and will
move.
Determine the position of the Head Assembly, which must be mounted on a solid structure. Ensure that there
is a clear line of sight (0.5 metres radius around the beam) to the proposed position of the prism(s), which is to
be mounted on a solid structure between 5 and 100 metres directly opposite the Detector (range and number of
prisms dependent on model).
Using the template provided, mark and install all 4 fixing points to the structure. The rear mounting plate of the
Detector Head Assembly is provided with 4 keyhole slotted apertures to allow for easy installation onto the 4
fixing points.
Replace the outer cover.
Terminate the field wiring. See section 8.
4.2. Prism(s) Installation.
Mount the Prism(s) on a solid structure, 90º to the beam path, between 5 to 50 metres (for the 50 metre
Detector), and 50 to100 metres (for the 100 metre Detector) directly opposite the Detector.
If the detector is to be placed in an atrium, or near glass/polished surfaces, the prism(s) should be
offset from the central line of sight (Refer to Section 3.2).
Offset Prism(s) position and beam path
Normal Prism(s) position and
central line of sight
Detector
head
Plan View
To Next Page
Loading...
