ProLaser III Operator's Manual
Page 24
A second test can be made by taking range
measurements to known, fixed distances. Perform the
test as follows:
1. Lay out a test range using a steel tape measure so
that several target distances between 50 and 500 feet are
clearly marked. Distances are measured from the front
face of the Pro-Laser III 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-Laser III laser beam.
3.Measure and record the reported distance and the
absolute distance error “DE” from actual.
4. Repeat for all remaining target positions.
5. Calculate the standard deviation of the errors as
follows (T represents the number of target distances
selected in #1, above):
S.D. =
√
∑
(DE)²
T-1
6. The standard deviation shall be less than .5 ft.
Differential Distance Test (DIF-TEST)
NOTE: Metric units are not equipped with this
feature.
Prepare two flat targets painted with a flat white paint;
plywood or particle board are suitable. Place the targets
at two precisely known, integer feet, distances along the
same line of sight. Use whole number distances such as
50 or 75 feet, not 50.26 or 74.87. It is strongly
recommended that distances between 50 and 100 feet be
used for practical reasons and that the zero foot point be
carefully marked. The target separation should be at least
10 feet. Mount the ProLaser III on a tripod (available as
on option from KSI) so that the front face of the unit is
precisely placed at the zero foot point.
Enter the DIF-TEST mode by pressing MENU and
selecting the menu item. The following screen will appear:
