Hilti PR 2-HS A12 User manual
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*2131237* 2131237 English 1
Original operating instructions
1 Information about the operating instructions
1.1 Explanation of symbols
1.1.1 Warnings
Warnings alert persons to hazards that occur when handling or using the product. The following signal words
are used:
DANGER
DANGER !
▶Draws attention to imminent danger that will lead to serious personal injury or fatality.
WARNING
WARNING !
▶Draws attention to a potential threat of danger that can lead to serious injury or fatality.
CAUTION
CAUTION !
▶Draws attention to a potentially dangerous situation that could lead to personal injury or damage to the
equipment or other property.
1.1.2 Symbols in the operating instructions
The following symbols are used in these operating instructions:
Comply with the operating instructions
Instructions for use and other useful information
Dealing with recyclable materials
Do not dispose of electric equipment and batteries as household waste
Hilti Liion battery
Hilti charger
1.1.3 Symbols in illustrations
The following symbols are used in illustrations:
These numbers refer to the illustrations at the beginning of these operating instructions.
The numbering reflects the sequence of operations shown in the illustrations and may deviate
from the steps described in the text.
Item reference numbers are used in the overview illustration and refer to the numbers used in
the key in the product overview section.
These characters are intended to specifically draw your attention to certain points when handling
the product.
1.2 Product-dependent symbols
1.2.1 Symbols on the product
The following symbols can be used on the product:
The product supports wireless data transmission compatible with iOS and Android platforms.
2 English 2131237 *2131237*
Hilti Li-ion battery type series used. Observe the information given in the section headed
Intended use.
Li-ion battery
Never use the battery as a striking tool.
Do not drop the battery. Never use a battery that has suffered an impact or is damaged in any
other way.
1.3 On the product
Laser information
Laser Class 2 based on the IEC60825-1 / EN60825-1:2007 standard in com-
pliance with CFR 21 § 1040 (Laser Notice 50).
Do not stare into beam.
1.4 Product information
products are designed for professional users and only trained, authorized personnel are
permitted to operate, service and maintain the products. This personnel must be specifically informed about
the possible hazards. The product and its ancillary equipment can present hazards if used incorrectly by
untrained personnel or if used not in accordance with the intended use.
The type designation and serial number are printed on the rating plate.
▶Write down the serial number in the table below. You will be required to state the product details when
contacting Hilti Service or your local Hilti organization to inquire about the product.
Product information
Rotating laser PR 2-HS A12
Generation 02
Serial no.
2 Safety
2.1 Safety instructions
2.1.1 Basic information concerning safety
Read all safety instructions and other instructions. Failure to observe the safety instructions and other
instructions may result in electric shock, fire and/or serious injury.
Retain all safety precautions and instructions for future reference. The term “electric tool” used in the
safety instructions refers to your mains-operated (corded) electric tool or battery-operated (cordless) electric
tool.
2.1.2 General safety instructions
▶Stay alert, watch what you are doing and use common sense when operating an electric tool. Do
not use an electric tool while you are tired or under the influence of drugs, alcohol or medication.
A moment of inattention while operating the electric tool may result in serious personal injury.
▶Do not render safety devices ineffective and do not remove information and warning notices.
▶Keep laser tools out of reach of children.
▶Laser radiation in excess of Class 2 may be emitted if the tool is opened without following the correct
procedures. Have the tool repaired only by Hilti Service.
▶Laser beams should be projected well above or well below eye height.
▶Take the influences of the surrounding area into account. Do not use the tool where there is a risk
of fire or explosion.
▶Statement in accordance with FCC §15.21: Changes or modifications not expressly approved by Hilti
may restrict the user’s authorization to operate the equipment.
*2131237* 2131237 English 3
▶You must check the accuracy of the tool after it has been dropped or subjected to other mechanical
stresses.
▶When the tool is brought into a warm environment from very cold conditions, or vice-versa, allow
it to become acclimatized before use.
▶Make sure that the tool is mounted securely when adapters or accessories are used.
▶Keep the laser exit aperture clean to avoid measurement errors.
▶Although the tool is designed for the tough conditions of jobsite use, as with other optical and
electronic instruments (e.g. binoculars, spectacles, cameras) it should be treated with care.
▶Although the tool is protected to prevent entry of dampness, it should be wiped dry each time
before being put away in its transport container.
▶Check the tool before using it for important measuring work.
▶Check the accuracy of the measurements several times during use of the tool.
▶Ensure that the workplace is well lit.
▶Do not expose the laser to rain or wet conditions.
▶Avoid touching the contacts.
▶Maintain the tool carefully. Check for misalignment or binding of moving parts, breakage of parts
and any other condition that may affect the tool’s operation. Have damaged parts repaired before
using the tool. Many accidents are caused by poorly maintained tools.
2.1.3 Proper preparation of the working area
▶Secure the area in which you will be taking measurements. Make sure that the laser beam is not
directed toward other persons or toward yourself while setting up the PR 2-HS A12.
▶Avoid unfavorable body positions when working from ladders. Make sure you work from a safe
stance and stay in balance at all times.
▶Readings taken in the vicinity of reflective objects or surfaces, through panes of glass or similar materials
may produce incorrect results.
▶Ensure that the tool is set up on a stable, level surface (not subject to vibration).
▶Use the tool only within its specified limits.
▶Use the tool and its accessories etc. in accordance with these instructions and in the manner
intended for the particular type of tool. Take the working conditions and the task to be performed
into account. Use of tools for applications different from those intended could result in a hazardous
situation.
▶Use of the telescopic staff in the vicinity of overhead high voltage cables is not permissible.
2.1.4 Electromagnetic compatibility
Although the tool complies with the strict requirements of the applicable directives, Hilti cannot exclude the
following possibilities:
• The tool may be negatively affected by powerful electromagnetic radiation, possibly leading to incorrect
operation.
In these cases, or if you are otherwise unsure, confirmatory measurements should be made by other
means.
• The tool may cause interference to other devices (e.g. aircraft navigation equipment).
Only for Korea:
This device is suitable for the electromagnetic radiation encountered in residential environments (Class B). It
is intended mainly for use in residential environments but may also be used in other environments.
2.1.5 Laser classification for Class 2 laser products
The tool complies with laser Class 2 as per IEC60825-1:2007 / EN60825-1:2007. This tool may be used
without need for further protective measures.
CAUTION
Risk of injury! Do not direct the laser beam toward persons.
▶Never look directly into the source of the laser beam. In the event of direct eye contact, close your eyes
and move your head out of the path of the laser beam.
2.1.6 Careful use of battery-powered tools
▶Do not expose batteries to high temperatures, the direct heat of the sun, and keep them away
from fire. There is a risk of explosion.
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▶Do not disassemble, squash or incinerate batteries and do not subject them to temperatures over
80°C (176°F). This presents a risk of fire, explosion or injury through contact with caustic substances.
▶Do not subject the battery to hard mechanical impacts and do not throw the battery.
▶Batteries must be kept out of reach of children.
▶Avoid ingress of moisture. Ingress of moisture may cause a short circuit, resulting in burning injuries or
fire.
▶Under abusive conditions, liquid may leak from the battery. Avoid contact with the liquid. If contact
accidentally occurs, flush with water. If the liquid contacts the eyes, also seek medical attention.
Liquid leaking from the battery may cause irritation or burns.
▶Use only batteries of the type approved for use with the applicable tool. Use of other batteries or
use of the batteries for purposes for which they are not intended presents a risk of fire and explosion.
▶Store the battery in a cool and dry place. Never store the battery where it is exposed to direct sunlight or
sources of heat, e.g. on heaters / radiators or behind glass.
▶When not in use, keep the battery and the charger away from paper clips, coins, keys, nails,
screws or other small metal objects that could cause a short circuit at the battery terminals or the
charging contacts. Short-circuiting the contacts on a battery or charger may cause burning injuries or
start a fire.
▶Do not charge or continue to use damaged batteries (e.g. batteries with cracks, broken parts, bent
or pushed-in and/or pulled-out contacts).
▶Recharge only with the charger specified by the manufacturer. A charger that is suitable for a certain
type of battery may present a risk of fire when used with other types of battery.
▶Observe the special guidelines applicable to the transport, storage and use of Li-ion batteries.
▶The battery must be insulated or removed from the tool before the tool is shipped or sent by mail.
Leaking batteries may damage the tool.
▶If the battery gets noticeably hot when not in use, this may indicate that the battery or the tool / battery
system is faulty. In this case, place the tool in a non-flammable location, well away from flammable
materials, where it can be kept under observation and allowed to cool down.
3 Description
3.1 Overview of the product
3.1.1 PR 2-HS A12 rotating laser 1
@Laser beam (plane of rotation)
;Rotary head
=Grip
%Battery release button
&Liion battery
(Battery charge status display
)Control panel
+Base plate with 5/8" thread
3.1.2 PR 2-HS A12 control panel 2
@On/off button
;LED: Auto-leveling
=Button and LED: Shock warning deactiva-
tion
%Button and LED: Manual inclined plane
mode
&Battery charge state LEDs
3.1.3 PRA 20 laser receiver control panel 3
@On/off button
;Volume button
=Units key
%Receiving area
&Marking notch
(Display
3.1.4 PRA 20 laser receiver display 4
@Indicator showing distance from laser plane
;Volume indicator
=Rotating laser low battery indicator
%Battery status
&Indicator showing position of receiver
relative to height of laser plane
(Display
)Marking notch
+Receiving area
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