Laser Technology UltraLyte LR B, Руководство пользователя

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Section #2 – Speed Measurements
24
Electronic Copy of LTI's UltraLyte LR B User's Manual - 2
nd
Edition © 2002
•
A high-pitched beep
means that a speed was captured.
As long as you hold the TRIGGER , the instrument will
continue to take speed measurements. The measured
speed will be displayed on the LCD screen and will be
projected on the scope, just below the aiming dot.
After you release the TRIGGER the instrument will display
the most recent speed reading and the distance at which it
was captured or an error code. When the most recent speed
reading is displayed, the display screen will look similar to
Figure 16.
The target’s Speed.
Distance from the midpoint
of the instrument to the
target.
Choosing a Roadside Location
When choosing a spot on the side of the road for measuring moving
vehicles, you will need to consider:
•
Do you have a clear line of sight?
• What is the angle between the instrument's position and the
target vehicle's direction of travel?
(approximately)
•
What is the distance to the target vehicles?
(approximately)
• How is the weather? Will you need to use the Weather Filter?
Line of Sight
Ideally, you should have a clear line of sight to the target vehicle.
However, if there is a break in the beam, the instrument may be able to
accumulate enough data to capture the target vehicle's speed.
• If there is a momentary break in the beam , the instrument will
accumulate data and may be able to capture the target
vehicle's speed. The instrument will display an error code if it
cannot capture the target vehicle's speed.
•
If there is an extended break in the beam,
the instrument will
display an error code.
MPH
SPEED
F
Figure 16. Sample Speed Measurement - Wall