
Section #2 – Speed Measurements
29
Electronic Copy of LTI's UltraLyte LR B User's Manual - 2
nd
Edition © 2002
Using the Weather Filter
Moisture is reflective. Weather such as rain, snow, or fog can make it
difficult for the laser to receive signals back from the target. This is
especially true when you are trying to capture speeds at close range.
The UltraLyte LR B includes a built-in Weather Filter that is an alternate
speed measurement mode. When the Weather Filter is active, the
factory-defined gate setting increases the instrument's minimum range
from 50 ft to 250 ft (15 m to 76 m). Increasing the minimum range
ensures that that the laser only acquires targets beyond the range
where weather affects the laser's ability to capture a speed reading.
When the Weather Filter is
active
:
•
The "SPEED" indicator is displayed.
•
The “GS” indicator appears on the screen, and word
“FiLtEr” appears at the bottom of the display screen
until it is overwritten by the distance to the target
vehicle when a speed measurement is completed.
•
Targets must be a distance greater than 250 feet (76 meters).
•
The instrument’s maximum range is
not
changed.
•
Other than the above items, the UltraLyte LR B operates the
same as when the Speed Mode is active and the Weather Filter
is OFF (see page 23).
Refer to the instructions and Figure 18 below to activate the Weather
Filter.
1.
Ensure that the UltraLyte LR B is powered ON.
2.
Press the
WEATHER FILTER button
.
The display should look similar to Figure 18.
3.
Aim the instrument at the target vehicle's license plate area
and press the
TRIGGER
. A low-pitched growl begins,
indicating the instrument is trying to acquire a lock on the
target.
Figure 18. Initial Screen When the Weather Filter is Active
MPH
SPEED
GS
F