Operation; Switching The Tool On And Using The Laser Detector; Working In The Horizontal Plane; Working In Manual Mode - Hilti PR 20 Operating Instructions Manual

7. Operation

7.1 Switching the tool on and using the
laser detector
1. The PRA 20 laser detector can be used
within an area up to 400m (1300ft) in
diameter.The laser beam is indicated by
visible and audible signals.
2. Mount the PRA 20 detector securely on
the telescopic staff or leveling staff and
switch it on by pressing the on / off key.
3. Set the desired sensitivity by pressing
the laser plane detection tolerance selec-
tion key.
4. Optional settings:
Use the audible signal setting key to
select the desired volume level.
Switching on sets the detector to the
standard signal volume. Adjust the
signal volume by pressing this key
repeatedly until the desired volume is
set (normal / loud / off).
5. Hold the PRA 20 within the plane of the
rotating laser beam.The laser beam is
indicated by visible and audible signals.

7.2 Working in the horizontal plane

1. Set up the tool in a suitable way for the
application to be carried out, e.g. on a
tripod.
2. Press the on / off button.
3. The auto leveling LED blinks green.
Shortly before the tool achieves the cor-
rect level, the laser beam switches
on and begins to rotate. The auto level-
ing LED lights constantly.
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Printed: 07.07.2013 | Doc-Nr: PUB / 5070169 / 000 / 00

7.3 Working in manual mode

1. Set up the tool in a suitable way for
the application to be carried out, e.g.
on a tripod.
2. The horizontal plane is no longer moni-
tored when manual mode is selected for
the X- and Y-directions.
3. Inclination in the X-direction: Press the
X-servo key twice within 2 seconds.
The X-direction can then be adjusted
manually by way of the X-key. The LED
lights red.
4. Inclination in the Y-direction: Press the
Y-servo key twice within 2 seconds. The
Y-direction can then be adjusted manual-
ly by way of the Y-key. The LED lights
red.
5. To return to the original mode, switch
the tool off and then on again.
-NOTE-
If the tool has been used immediately
beforehand in manual mode (manual
adjustment of the X- and/or Y-direction)
the settings last used can be retained by
pressing one of the inclination / direction
keys within 3 seconds after switching the
tool on. This must then be confirmed by
pressing the inclination / direction key, oth-
erwise the tool returns to the standard
operating mode..
7. Operation