2. Fit the tool, complete with the rubber sleeve, onto
the grip section. The cover and grip section are
joined together by the magnetic holder.
3. Switch the tool 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 tool with the receiving area 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 tool in the PRA 81 height transfer device.
3. Close the locking mechanism on the PRA 81.
4. Switch the tool on by pressing the on/off button.
5. Hold the tool with the receiving area in the plane of
the rotating laser beam.
6. Position the tool so that the distance display shows
“0”.
7. Use the measuring tape to measure the desired
offset distance.
6.2.5 Setting the measuring unit
The “Units” button can be used to set the desired accur-
acy of the digital display (mm/cm/off).
6.2.6 Volume adjustment
The tool is set to “Normal” volume when switched on. The
volume can be adjusted by pressing the “Volume” button.
One of four settings can be selected: “Low”, “Normal”,
“High” or “Off”.
6.2.7 Menu options
Press the on/off button for two seconds when switching
the tool on.
The menu is then shown in the display.
Use the “Measuring units” button to select metric or U.S.
/ imperial measuring units.
Use the “Volume” button to assign the more rapid signal
tone to the receiving area above or below the marking
notch.
To save the settings, switch the tool off.
7 Care and maintenance
7.1 Cleaning and drying
1. Blow dust off the surfaces.
2. Do not touch the display areas or the receiving area
with the fingers.
3. Use only a clean, soft cloth for cleaning. If necessary,
moisten the cloth slightly with pure alcohol or a little
water.
NOTE
Do not use any other liquids as these may
damage the plastic components.
4. Dry the equipment, observing the maximum tem-
peratures given in the technical data.
NOTE
Especially in summer and winter, take care
that the given maximum and minimum temperatures
are not exceeded, e.g. when the equipment is stored
in a motor vehicle.
7.2 Storage
Remove the tool from its case if it has become wet. Dry
and clean the tool, its transport container and accessor-
ies (while observing the permissible temperature range).
Repack the equipment only once it is completely dry.
Check the accuracy of the equipment before it is used
after a long period of storage or transportation.
Remove the batteries from the tool before storing it for a
long period. Leaking batteries may damage the tool.
7.3 Transport
Use the original Hilti packaging or packaging of equivalent
quality for transporting or shipping your equipment.
CAUTION
Remove the batteries from the tool before transporting or
shipping it.
7.4 Calibration by the Hilti Calibration Service
We recommend that the system is checked by the Hilti
Calibration Service at regular intervals in order to verify
its reliability in accordance with standards and legal re-
quirements.
Use can be made of the Hilti Calibration Service at any
time, We recommend that the system is calibrated at
least once a year
The Calibration Service provides confirmation that the
system is in conformance, on the day it is tested, with
the specifications given in the operating instructions.
In the event of deviation from the manufacturer's specific-
ation, the used tool will be readjusted. After checking and
adjustment, a calibration sticker applied to the system
unit and a calibration certificate provide written verific-
ation that the system operates in accordance with the
manufacturer’s specification.
Calibration certificates are always required by companies
certified according to ISO 900x.
The Hilti representative in your local region will be pleased
to provide further information.
en
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Printed: 26.08.2013 | Doc-Nr: PUB / 5152311 / 000 / 00
