Hilti PD 42, Operating Instructions Manual, Page: 19 / 181

m
6.962
8.642 m
m
5.123
3. Press the “Plus” button and measure the next length.
The sum of the two lengths is shown in the results
line.
4. Press the “Plus” button again to make the tool ready
to measure the next length.
The total length is then displayed in the top interme-
diate result line.
5. Measure the third length and, if necessary, any
further lengths.
6. Once all wall lengths have been added together,
press the “Measure” button again after taking the
last measurement and when the total of all meas-
urements is shown in the result line at the bottom of
the display.
The total length is transferred to the top intermediate
result line and a multiplication symbol is shown in
the line below.
7. Now measure the height of the walls (= height of the
room).
The total wall area of the room is shown in the result
line at the bottom of the display.
8. The C-button can be pressed at any time to stop the
last measuring operation, clear the result and restart
measuring.
NOTE Further “Undo” steps are not possible. If the
C-button is pressed several times or the FNC-button
pressed once, the function will be canceled.
NOTE The “Minus” button can be used to subtract
certain distances, e.g. dimensions of windows or
doors. The “Plus” and “Minus” buttons can be used
alternately at any time.
7.10 Indirect measurements
A distance can be measured indirectly by taking several
measurements and the result then calculated using the
Pythagoras rule. The indirect measurement functions are
accessed by pressing the FNC-button. Three functions
are available for use:
The “Single Pythagoras” function using a triangle with
two measured distances.
The “Double Pythagoras” function with 2 adjoining tri-
angles.
The “Combined Pythagoras” function using 2 part tri-
angles.
NOTE
A reduced level of accuracy, much lower than the level
of accuracy of the tool itself, must generally be expected
when the indirect measuring method is used. In order to
obtain the best results, care must be taken regarding the
geometry of the situation (i.e. right angles and triangle
relationships). Best results are obtained when the tool
is aimed carefully at the corners of the object, when all
points are within the same plane and when the measure-
ments are taken from a location not too far away from
the object.
7.10.1 The “Single Pythagoras” method
Follow the symbols in the display. The blinking side of the
triangle indicates the measurement to be taken. When the
2 required distances have been measured, the result is
then calculated and shown in the result line in the lower
area of the display.
1. Press the FNC-button to activate the “Single Py-
thagoras” function.
NOTE When the “Single Pythagoras” function is
activated, the laser beam is already switched on.
2. Aim the tool at the target as indicated by the symbol
in the display.
Press the “Measure” button.
3. The graphic display automatically prompts you to
measure the shorter distance.
4. Aim the laser spot at the target and press the “Meas-
ure” button.
NOTE Please note that this distance is measured in
continuous measuring mode in order to ensure that
the shortest distance to the target (at right angles) is
measured reliably.
When the second measurement has been taken,
the tool then immediately calculates the opposite
“indirect distance”.
The system checks whether the geometric relation-
ship allows a result to be calculated. An invalid
result, due to inappropriate geometry, is indicated
by the result line blinking (broken line). In this case,
one or both of the distances must be remeasured.
en
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Printed: 08.07.2013 | Doc-Nr: PUB / 5070024 / 000 / 01