Operation - Hilti PR 25 Operating Instructions Manual

7. Operation

7.1 Switching the tool on
Press the on/off key.
7.2 Selecting the speed of rotation
The speed of rotation can be adjusted by pressing the
rotation speed control key (PR 25 or PRA 25). After
switching on, the PR 25 is set to rotate at medium speed,
as standard.
– Press the key once to set rotation to medium speed.
– Press the key again to set rotation to high speed.
– Press the key once more to return to medium speed.
– Press the key yet again to set rotation to low speed.
– A further press of the key stops rotation.
– The next press of the key sets rotation to low speed.
– This procedure repeats itself.
7.2.1 Selecting the line laser function
After pressing the line function key, the PR 25 projects
a laser line. The line can be lengthened or shortened by
pressing the key again.
– Press the key once to project a short line.
– Press the key again to project a medium-length line.
– Press the key once more to project a long line.
– Press the key yet again to project an extra-long line.
– A further press of the key switches the tool back to the
long line.
– The next press of the key switches the tool back to the
medium-length line.
– This procedure repeats itself.
7.2.2 Moving the laser line and spot
The laser line or laser spot can be moved to the left or
right by pressing the direction keys (PR 25 or PRA 25).
Holding down the direction keys increases the speed of
movement and the laser line or spot then move contin-
uously.
7.2.3 Working in the horizontal plane
– Mount the tool suitably, depending on the application,
e.g. on a tripod.
– Press the on/off key.
-NOTE-
The laser beam switches on and begins to rotate as soon
as the tool has leveled itself.
7.2.4 Working in the vertical plane
– Stand the tool on a level surface in a suitable position
for the application.*
– Press the on/off button.
-NOTE-
*In order to ensure that the specified accuracy is main-
tained, the tool should be stood on an approximately
level surface.
-NOTE-
The X LED does not light (the X-direction is brought into
vertical alignment automatically and monitored).
The Y LED lights red (the Y-direction can be aligned man-
ually by way of the servo keys, the laser plane remains
perpendicular).
7.2.5 Automatic alignment
A basic prerequisite for auto alignment is that the PR 25
is set up accurately. The PR 25 must be set up so that
the correct axis (X or Y) is positioned in the direction in
which alignment is to be performed. This can only be
done in conjunction with the PRA 25.
Procedure:
– Position the PR 25 at the reference point and with the
correct axis in the direction in which alignment is to
be performed (the operating range for auto alignment
is a radius of 5-50 m).
– Position the PRA 25 laser detector at the desired point.
– Check that no obstacles prevent communication between
the PR 25 and the PRA 25.
– Activate the auto alignment function by pressing the
X or Y key three times within one second. It is impor-
tant that the axes correspond correctly, i.e. when X (Y)
is to be aligned with the reference point, auto align-
ment of the X (Y) axis must be enabled by way of the
PRA 25.
– As long as the PR 25 is not in line laser mode, it then
switches automatically to medium rotation speed and
begins the search process. The auto align function is
indicated in the display by the axis currently being
aligned and by blinking arrows. An audible signal is
emitted continuously during the search process.
– The direction of the search process can be changed
by pressing the direction arrows.
– The beam moves to the zero point (reference plane)
as soon as the laser beam strikes the target area on
the PRA 25 detector.
– After reaching this point (finding the reference plane),a
signal sounds briefly indicating that the process is
complete. Only the axis that has been aligned is then
shown in the display.
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