Proper Organization Of The Work Area; Electromagnetic Compatibility; Before Use; Operation - Hilti PRA 20G Mode D'emploi

4.3 Proper organization of the work area

a) Avoid unfavorable body positions when working
on ladders or scaffolding. Make sure you work
from a safe stance and stay in balance at all
times.
b) Measurements taken through or from panes of glass
or through other objects may be inaccurate.
c) Use the tool only within its specified limits.
d) Use of the telescopic staff in the vicinity of over-
head high voltage cables is not permissible.

5 Before use

5.1 Inserting the batteries 3
DANGER
Do not use damaged batteries.
DANGER
Do not mix old and new batteries. Do not mix batteries
of different makes or types.

6 Operation

6.1 Switching the tool off and on
Press the on/off button.
6.2 Working with the laser receiver
The receiver can be used at distances (radiuses) of up to
75 m (240 ft). The laser beam is indicated visually and by
a signal tone.
6.2.1 Using the receiver as a hand-held tool
1. Press the on/off button.
2. Hold the receiver in the plane of the rotating laser
beam.
6.2.2 Working with the receiver in the PRA 80
receiver holder 4
1. Open the catch on the PRA 80.
2. Place the receiver in the PRA 80 receiver holder.
3. Close the catch on the PRA 80.
4. Switch the receiver on by pressing the on/off button.
5. Rotate the grip to bring it into the open position.
6. Secure the PRA 80 receiver holder on the telescopic
staff or leveling staff by tightening the clamping
knob.
7. Hold the receiver with the receiving window in the
plane of the rotating laser beam.

4.4 Electromagnetic compatibility

NOTE
Only for Korea: This device is suitable for the electromag-
netic radiation encountered in residential environments
(Class B). It is intended mainly for use in residential en-
vironments but may also be used in other environments.
Although the tool complies with the strict requirements
of the applicable directives, Hilti cannot entirely rule out
the possibility of the tool being subject to interference
caused by powerful electromagnetic radiation, leading
to incorrect operation. Check the accuracy of the tool
by taking measurements by other means when working
under such conditions or if you are unsure. Likewise, Hilti
cannot rule out the possibility of interference with other
devices (e.g. aircraft navigation equipment).
NOTE
The laser receiver may be powered only by batteries man-
ufactured in accordance with the applicable international
standards.
NOTE
Check to ensure correct polarity when inserting the bat-
teries.
6.2.3 Working with the receiver in the PRA 83
receiver holder 4
1. Push the receiver into the rubber sleeve of the PRA
83 at an angle until it fully encloses the receiver.
Take care to ensure that the receiving window and
the buttons are facing the front.
2. Fit the receiver, complete with the rubber sleeve,
onto the grip section. The cover and grip section are
joined together by the magnetic holder.
3. Switch the receiver on by pressing the on/off button.
4. Rotate the grip to bring it into the open position.
5. Secure the PRA 83 receiver holder on the telescopic
staff or leveling staff by tightening the clamping
knob.
6. Hold the receiver with the receiving window in the
plane of the rotating laser beam.
6.2.4 Working with the PRA 81 4
1. Open the locking mechanism on the PRA 81.
2. Insert the receiver in the PRA 81 height transfer
device.
3. Close the locking mechanism on the PRA 81.
4. Switch the receiver on by pressing the on/off button.
5. Hold the receiver with the receiving window in the
plane of the rotating laser beam.
en
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