LaserAce® Pocket Series
Issue 1.0
© Copyright 1999-2008 Measurement Devices Limited
Page
32
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CRITICAL HT
00
2
.5 m/ft
Scrolls through unit
selection
Increments units
selected
The user is asked to use either Critical Height or Critical Diameter to sound alert in two point and three point
height methods in length/lean/volume mode.
The CRITICAL HEIGHT offset allows you to enter a height that the instrument will sound an alert once it has
been reached. After recording the diameter and the bottom measurement as you move the instrument upwards
the unit will beep once the critical height has been reached. Pressing the fire button again will complete the
measurement.
If CRITICAL DIAMETER is set to some non-zero positive value, once a diameter has been measured, using the
tapering factor the LaserAce® unit calculates the height at which the critical diameter would be on the tree trunk.
Hence as the user moves the instrument along the length of the tree, the unit beeps when the height
corresponding to the critical diameter is reached. This way the LaserAce® Pocket Series can be used to
measure tree logs with diameters not smaller than the critical diameter.
The CRITICAL AREA & CRITICAL RADIUS options are interrelated, ie when one gets changed, the other gets
updated as well. Critical area is a circular area within which the user might want to measure trees and not
include any tree beyond the critical area with the Hypsometer positioned at the centre of the circular area. The
corresponding radius is the Critical Radius; if the Critical Radius is set to any value (other than zero) the laser
will not range beyond Critical Radius.
NOTE: Critical Radius cannot be greater than 199 metres to limit excessively large critical area.
