Pro-Lite Operator’s Manual
Page 24
ACCURACY TESTS
Press and release the FIRE pushbutton on the top of
the unit to power on the unit and allow the instrument to
complete the self–test sequence. Although the internal test
performs a complete check of the Pro-Lite's range and
speed processing circuitry, you may occasionally want to
test the instrument against an external standard.
First, check the alignment of the HUD aiming reticle.
Place the unit in the RANGE mode. Select an isolated
target with a clear background, such as an overhead power
wire about 100 or more feet (30 meters) away. Depress the
trigger and slowly sweep the Pro-Lite from a clear
background (such as sky) across the target and observe
that the target range is displayed only when the target is
within the reticle area, indicating vertical alignment.
(Listening to the audio "chirp" indicating reflection of laser
pulses is helpful when using overhead wires.) Rotate the
Pro-Lite so that it is at right angles to its normal operating
position, (positioned on its side) and repeat the process to
verify horizontal alignment. If any range reading is
obtained when the aiming reticle is not directly over the
target, or any other test is failed, the unit is to be removed
from service and sent in to Customer Service.
Taking range measurements to known, fixed distances
is similar to using a tuning fork with a Doppler radar unit.
Perform the test as follows:
1. Lay out a test range using a steel tape measure or other
means of accurately measuring distances so that target
distances between 50 and 500 feet are clearly marked.
Normally, 1 or 2 distances are used. Distances are
measured from the front face of the Pro-Lite and should
be integer multiples of .1 ft. (i.e. 50.1, 74.6, 200.5, etc.)
2. Place the target on the first mark and position
perpendicular to the Pro-Lite laser beam.
3. Measure and compare the displayed distance and the
absolute distance.
4. Repeat for any remaining target positions.
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