Timeguard MTLW3000 - Manual (Page 4)

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A moving human body needs to cross/enter one of
these zones to activate the sensor. The best all-round
coverage is achieved with the unit mounted at the
optimum height of 2.5m.
Careful positioning of the sensor will be required to
ensure optimum performance. See diagram A detailing
detection range and direction.
The unit will not detect through glass (e.g. in a glazed
porch).
The detector is more sensitive to movement ACROSS its
field of vision than to movement directly TOWARDS (see
diagram B). Therefore position the unit so that the
sensor looks ACROSS the likely approach path.
Avoid positioning the detector where there are any
sources of heat in the detection area (extractor fans,
tumble dryer exhausts etc.) including opposite any
other light sources such as other security lights.
Reflective surfaces (ie pools of water or white-painted
walls) and overhanging branches may cause false
activation under extreme conditions.
During extreme weather conditions the motion sensor
may exhibit unusual behaviour. This does not indicate
a fault with the sensor. Once normal weather
conditions return, the sensor will resume normal
operation.
Light pollution
To reduce the risk of light pollution, consider the
following when installing the any lights controlled
by this unit.
Position the light to ensure that the light emitted does
not encroach onto neighbouring properties.
Angle the floodlight downward to focus the
illumination onto the ground, not into the sky.
Consider using a lower wattage bulb (200W/300W for a
500W floodlight) to save energy and reduce high light
output if not required.