ProLaser III Operator's Manual
Page 28
If the instrument is aimed at a fairly large, distant
object, and then "panned" or swept across the surface of
the structure, you may occasionally hear the intermittent
aiming tone sound. This occurs because the ProLaser III
is attempting to interpret a series of changing range
measurements as a velocity. Normally, no range reading
will be displayed because this erratic motion does not
fulfill the accuracy criteria of the range determination
process.
Keep in mind that when making range measurements,
the instrument does not measure distances shorter than
10 feet. Aiming the ProLaser III at objects closer than 10
feet will not produce a range or speed display.
Stopwatch Mode
The stopwatch mode of the ProLaser III is used to
calculate average speed based on the elapsed time taken
by a vehicle to travel a predetermined distance. To use
the stopwatch mode, press the MENU switch and use the
blue arrow switches to move to the STPW selection. Press
ENTER to access the stopwatch menu.
There are three methods that can be utilized in this
mode- 1) measure a range, followed by a shorter range
and use the difference; 2) measure a range and use your
location as the second point; 3) use a predetermined
distance. The initial stopwatch menu screen appears as:
STPW Distance
(ENTER) MEASURE