Leica Geosystems Leica DISTO Pro - Manual (Page 31)

33 DISTO™ pro 4 / pro 4 a-1.0.0en English
en
Basic functions, contd.
Pythagoras (4.4)
Using this menu function distances
not accessible for the DISTO can be
computed indirectly.
Examples:
• Height and width of buildings from a
distance.
• Measuring inaccessable parts of a
façade.
• Comfortably measuring while
standing without bending down or
using accessories such as target
plates.
DISTO computes the desired length
by using two or three auxiliary
measurements based on a right-
angled triangle applying the Pytha-
goras function.
Default setting: none
The auxiliary measurements require:
• That the preset measuring directions
(triangle) be adhered to.
• The laser measuring points have to
be on one line in a horizontal or
vertical plane. Measurements made
over elevations provide wrong
results.
• The second auxiliary measurement
must be made perpendicular to the
desired length.
• The second laser measuring point
has to fall within the distance of the
desired length or be the end point of
that length.
• Only if measured distances are
short and the DISTO can be placed
firmly against an object should
measurements be done holding the
DISTO by hand. Exact
measurements require the use of a
stand.
For vertical measurement
always use the stand
connection on the adapter end cover
of the DISTO. Only in this way does
the axis of the laser beam run
through the point of rotation of the
stand.
If the DISTO is used with the stand
connection at the bottom of the
casing then the axis of the laser
beam runs about 70 to 100 mm over
the point of rotation. This does not
matter when measuring in the hori-
zontal, but in the vertical this can
lead to considerable height
deviations.
After calling up this menu function
the following is displayed:
The first side of the triangle to be
measured and the corresponding
number "1" are displayed in black.
Press briefly to change into
Pointing mode.
Point at the first measuring point with
the laser.
Trigger measurement. Hold
DISTO steady.
Without a stand there is the
possibility of a shaky
measurement. Thus in the Pointing
mode either:
- use the time delay release (x-key)
- or press the trigger key long enough
to start maximum tracking.
PD-Z27
PD-Z44
pythagoras 4.4
1
2
3
PD-Z38