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The board can then be moved up or down
for access to the knockout mounting holes
in the base.
3. Refer to Figure 3 for location of knockout
holes in the base. Break out only those
holes required.
4. Mount the detector w ith screws, using the
selected mounting holes.
5. Before fully tightening the PC board holding
screw, make sure the board is positioned so
that the arrow is in line with the appropriate
setting on the graduated scale on the right-
hand side of the PC board (see Table 1,
and Fig. 5).
Figure 2. Cover Removal
Figure 3. Mounting Holes in Base
Recess Mounting
Recessed mounting requires the use of the
optional No. 1990MK Recess Mounting Kit.
Complete instructions for the use of this kit
accompany it. Note: Holes "C" in the detector
base (accessible only when PC board is
removed) are used for recessed mounting.
Changing Lenses (if required)
1. Remove front cover.
2. Squeeze upper lens lock located in front
cover to release upper Fresnel lens support.
Squeeze lower lens lock to release lower
Fresnel lens support (see Fig. 4).
3. Note how the lens supports are positioned,
then remove the supports.
4. Carefully remove the existing lens and
replace with an
optional coverage
replacement lens. The lens must
installed with the smooth side facing
outward . Also, the lens should be oriented
with its part number on the upper right-hand
side (see Fig. 4). Be sure to center the
lens.
Note: Lens surface should be free of dirt,
foreign matter and finger-prints. Use a
clean dry soft cloth to wipe lens surfaces, if
required.
5. Replace top and bottom lens supports and
then press downward so that the lens locks
snap into position, thus securing the lens in
place.
6. Refer to Table 1 for recommended PIR
mounting height, pulse count setting, and
pattern setting for the lens in use.
7. Replace the front cover (make sure the
cover snaps tightly).
Figure 4. Changing Lenses
Vertical Pattern Adjustment
The protection pattern provided by the lens in
use can be raised or lowered by re-positioning
the PC board in the detector. A graduated scale
to the right of the board (see Fig. 5) indicates
the approximate number of degrees by which
the pattern can be raised (max. +5°) or lowered
(max. -15°). The detector is normally shipped
with the board set to the 0° position. To make
this adjustment, remove the cover on the
detector and loosen the screw holding the PC
board (the screw is located at the approximate
center of the board). Slide the board upward or
downward by the number of degrees required,
then tighten the holding screw again. After any
adjustment, you must conduct a walk test to
ensure proper coverage of the area to be
protected,
as
indicated
Procedures".
Lens Masking
The masking strips that have been supplied are
designed for application to one or more lens
segments to produce a protection pattern that
suits the particular requirements of the
protected area. Individual masking strips have
been provided for each of the lens segments on
the standard lens supplied with the PIR. Simply
peel off the appropriate pressure-sensitive
adhesive strip(s) and apply over the desired
lens segment(s). Be sure to affix the masking
strips to the inside of the lens (not the outer,
smooth side). Each lens segment that is
masked results in the elimination of one zone of
protection from the coverage pattern. By
masking segments of the lens, you can adjust
the coverage to suit the area to be protected, or
eliminate coverage from areas where you
anticipate environmental disturbances that
might reduce the PIR's stability (a heater or
be
other heat-producing object for example).
Important: When hallway pattern masking is
used, be sure the PIR is set for instant
response.
Horizontal Adjustment of Lens
The protection pattern provided by the lens can
e moved to the left or right by horizontal
adjustment of the lens, as follows:
2
1. Remove front cover.
2. Press inward on the upper and lower lens
locks at the left or right side only to release
the lens supports on one side. Now slide the
lens to the left or right, as needed. The lens
may be moved as much as 8° (from center)
in either direction.
3. When the lens is in the desired position,
press the lens locks downward (on the
released side) to lock the supports in place.
4. Replace the front cover (make sure the
cover snaps tightly).
After any adjustment, you must conduct a walk
test to ensure proper coverage of the area to be
protected,
Procedures".
PULSE COUNT OPTION
Each detector includes Pulse Count circuitry
that is designed to provide stability in adverse
environments to minimize false alarms. Pulse
count is selected by positioning a jumper across
the ON pulse count terminals (shown in Figure
5). When set for pulse count, the detector will
signal an alarm within 2 or 3 steps, since the
processing logic requires more complex motion
than just a momentary event.
detector verifies an intrusion, the built-in
transmitter will send an alarm message to the
QED control/receiver.
LED DISABLE
The detector is shipped with the LED disabled
(LED jumper in the "NORMAL" position). The
LED may be enabled (for the "Walk-Test") by
positioning the LED jumper in the "TEST"
position (see Fig. 5).
Note: When the jumper is in the "NORMAL"
position, the LED will not light, but the built-in
transmitter will transmit alarms when the PIR
senses motion.
under
"Test
OPTIONAL LENSES
Two optional lenses are available which may be
used with the PIR.
lenses
is provided in Table 1. Refer to
Changing Lenses in this document if one of the
optional lenses is being installed in place of the
standard lens.
TEST PROCEDURES
Important: Testing should be conducted with
the protected area cleared of all people. Place
the protective system's QED control in the Test
mode
as
indicated
under
"Test
When the
Figure 5. PC Board
Information for
these
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