Height Pivot Offset - Laser Technology IMPULSE LR User Manual

T H M
AKING A EIGHT
Height Measurement Hints: The Impulse uses an
HD and the two successive INC readings to
calculate a height. Therefore, when taking a base
or top angle reading, you don't need an actual
target to shoot to since only the tilt sensor is
activated. In the case of measuring a tree height,
you should aim to where you think the top of the
tree actually is, not just the highest point you can
see.
The best heights for tapered objects (such as trees)
or non-vertical objects are taken by placing a
reflector directly next to the target, at the center of
its girth. This insures the most accurate horizontal
distance reading, thus leading to the most accurate
height calculation. Filter mode is helpful in this
situation.
Page 30
EASUREMENT
Electronic Copy of LTI's Impulse User's Manual 8
To acquire multiple height points on a single tree
(or other object) whose height you have just
measured, press Back once, reshoot the top angle,
then press Fire to display the new height.

Height Pivot Offset

For the most accurate possible height
measurements, you should account for the
difference between the measuring point of the
instrument and the point at which it pivots to take
the base and top angle measurements.
To take that difference into account, the Impulse
provides the PIVOT option, which allows you to
specify a height pivot offset. The offset is added to
the slope distance measurement, enabling the
instrument to
th Edition © October 1998