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CAUTION
Draws attention to a potentially dangerous situation that
could lead to slight personal injury or damage to the
equipment or other property.
NOTE
Draws attention to an instruction or other useful informa-
tion.
1.2 Explanation of the pictograms and other
information
Warning signs
General
warning
Warning:
caustic
substances
Warning:
electricity
Symbols
Read the
operating
instructions
before use.
For indoor
use only
Return waste
material for
recycling.
Location of identification data on the tool
The type designation and serial number can be found
on the type identification plate on the appliance. Make
a note of this data in your operating instructions and
always refer to it when making an enquiry to your Hilti
representative or service department.
Type:
Generation: 01
Serial no.:
2 Description
2.1 Use of the product as directed
The PRA 90 is an automatic tripod onto which a rotating laser can be fitted. The tripod can be moved upwards and
downwards using a remote control unit. Using the tripod and the rotating laser fitted to it, a horizontal laser plane can
be established which is directed onto a particular target height. Examples of applications using the rotating laser are
the transfer of meter marks, horizontal alignment at a target height or the examination of horizontal heights.
Use of appliances/mains adapters which show visible signs of damage is not permissible. Operation in the “Charging
during operation” mode is not permissible for outdoor operations or in damp surroundings.
To avoid the risk of injury, use only genuine Hilti tools and accessories.
Observe the information printed in the operating instructions concerning operation, care and maintenance.
Take the influences of the surrounding area into account. Do not use the power tool or appliance where there is a risk
of fire or explosion.
Modification of the appliance or tampering with its parts is not permissible.
2.2 Automatic alignment of tripod and rotating laser
7
The tripod can essentially be used with most types of rotating laser. The greatest benefit, however, is achieved if the
Hilti PR 35 rotating laser is used. The PR 35 rotating laser was specially designed for the PRA 90 and has a 3-appliance
communication system between the tripod, the rotating laser and the corresponding PRA 35 remote control unit/laser
receiver.
The combination of the PRA 90, the PR 35 rotating laser and the PRA 35 remote control unit/laser receiver which
comes supplied with the PR 35 enables a laser plane to be automatically aligned onto a precise point. In this operation,
only the target height has to be indicated using the PRA 35 and the PRA 90 moves the laser plane of the PR 35 rotating
laser exactly to the required height.
If a rotating laser other than the PR 35 is used, you will need the PRA 92 remote control unit in order to move the
tripod up and down.
en
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Summary of Contents for Pra 90
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