5.
Setting the detection area:
The IR-2500 comes with a user modifiable mask on
the lens (figure 4) to adjust the width of the detec-
tion area from approximately 16˚ to 100˚. The mask
comes in two pieces, and fits into the slots above &
below the lens cover. Each half of the mask is per-
forated and can broken into three separate strips
(figure 4). Each strip of the mask represents ap-
proximately 16˚
of viewing angle. The user breaks
off the appropriate number of strips to provide the
required viewing angle. For example, to monitor a
48˚ angle (figure 5), break off three strips from the
mask (3 x 16˚= 48˚).
NOTE:
The two halves of the mask do not need to
be symmetrical, a different number of strips can be
broken off either side.
Frequency: 434 MHz
Operating range: -30˚F to 110˚F
Battery life: 6-12 months
figure 4
