2
DE3635
Figure 3.
Components Layout
3.2 Enrolling the Transmitter ID in the
Target Receiver’s Memory
Refer to the target receiver’s installation instructions and follow the
procedure given there for “teaching” transmitter IDs. It is much
easier to carry out this operation in close proximity to the receiver.
3.3 Selecting the Mounting Location
The K-940MCW can be mounted directly onto the wall (surface
mounted), or in a corner, using the mounting knockouts. Always
mount the unit on a firm and stable surface. Optional swivel
brackets permit greater flexibility when directing the detector at a
desired point (Para. 3.8).
A.
Select the mounting location so that an intruder's motion will
be perpendicular to the detector’s coverage pattern.
B.
You may mount the unit at the height of 1.8 m (6 ft), or 2.1 m
(7 ft), or 2.4 m (8 ft).
Important!
The detector is immune to 18 kg
(40 lb) animals moving on the floor or
climbing on furniture as long as the activity
takes place below 1 m (3 ft). Above the 1 m
(3 ft) height limit, the detector is immune to
9
kg
(20
lb)
pets, but
the
pet
immunity
will
decrease as the pet gets closer to the detector. It is therefore
recommended to select a mounting location that minimizes
potential close proximity of animals.
These characteristics have not been verified by UL.
C.
To minimize false alarms, avoid aiming the detector at heaters,
sources of bright light, or windows subjected to direct sunlight.
D.
The PIR detector senses the difference between the infrared
energy transmitted by a moving body and the background
temperature. It is therefore recommended that the PIR be
aimed toward the coolest place in the protected area, in order
to obtain the maximum sensitivity in installations where high
background temperatures are expected.
3.4 Direct Mounting
A.
Loosen and remove the screw at the bottom of the case and
take the cover off.
B.
Punch out the appropriate mounting knockouts in the base.
Note:
For wall surface mounting, use the two elongated
knockouts at the middle of the base. For corner mounting, use
two diagonally opposite knockouts at the angled sides of the
base (see Figure 3).
C.
Loosen the vertical adjustment screw, slide the printed circuit
board upward and remove it via the “keyhole”.
D.
Use the base as a template for marking the drilling points.
E.
Drill mounting holes and insert masonry anchors if required.
F.
Mount the base in place using two screws.
G.
Remount the PC board and secure it with the vertical
adjustment screw.
3.5 Vertical Adjustment
A. Pet-Immune Applications
To maintain maximum coverage range and
pet immunity, the vertical adjustment scale
must be adjusted in accordance with the
actual mounting height (refer to Figure 4).
Loosen the vertical adjustment screw
and
slide the printed circuit board up or down until
the pointer shows the actual mounting height on the scale.
When done, re-tighten the screw well.
Figure 4.
Vertical Adjustment
B. Pet-Free Locations
To obtain the best coverage possible where no pets are present,
mount the detector with a swivel bracket (see Para. 3.8) at any
desired height between 1.8 m (6 ft) and 2.4 m (8 ft). Then set the
vertical adjustment scale
to the 2.4 m (8 ft) position
and use the
bracket to tilt the detector 30° down.
3.6 Setting the Pulse Counter
K-940MCW detectors are equipped with a programmable pulse
counter which can be set to count 1, 3 or 5 pulses, before
activating the wireless transmitter.
The factory default is 3
pulses
. Place the pulse count jumper at the desired setting (1, 3
or 5 - see Figure 5).
Figure 5.
Setting the Pulse Counter
3.7 Walk Testing
The K-940MCW is equipped with a LED/WALK TEST jumper
which is set by default to ON. In this default position, the
LED lights for 2 seconds upon transmission by the unit.
To save battery power in normal use, an automatic timer inhibits
the detector for approximately 2 minutes after transmitter
activation. The detector is automatically rearmed 2 minutes after
detection of the last motion.
For effective walk testing, it is necessary to override
the 2 minute timer by setting the LED/WALK-TEST
jumper to the TEST position as shown to the right.