PR 2-HS
Operating instructions
Mode d’emploi
en
fr
Manual de instrucciones
Manual de instruções
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ORIGINAL OPERATING INSTRUCTIONS
PR‑2‑HS rotating laser
en
Inserting and removing the battery 2
It is essential that the operating instructions
are read before the tool is operated for the
first time.
PRA 84 Li‑ion battery
Battery compartment
Catch
@
;
=
Always keep these operating instructions to-
gether with the tool.
Charging the battery in the tool 3
Ensure that the operating instructions are
with the tool when it is given to other persons.
PUA 81 AC adapter
@
Charging socket
;
Contents
Page
2
Charging the battery after removal from the tool 4
1 General information
2 Description
2
PUA 81 AC adapter
@
;
=
3 Accessories
4
PUA 82 motor vehicle power adapter
Charging activity LED
4 Technical data
5
5 Safety instructions
6 Before use
6
8
Rotating laser control panel 5
7 Operation
9
8 Care and maintenance
9 Disposal
11
12
12
On/off button
@
;
=
10 Manufacturer’s warranty - tools
11 FCC statement (applicable in US) / IC
statement (applicable in Canada)
Auto-leveling LED
Shock warning function deactivation button and
LED
%
&
13
Manual inclined plane mode button and LED
Battery charge status LED
1 These numbers refer to the corresponding illustra-
tions. The illustrations can be found on the fold-out cover
pages. Keep these pages open while studying the oper-
ating instructions.
PRA 20 laser receiver control panel 6
On/off button
In these operating instructions, the designation “the tool”
or “the rotating laser” always refers to the Hilti PR 2-HS
rotating laser. “Laser receiver” or “receiver” always refers
to the PRA 20 (02) laser receiver.
@
Units button
Volume button
Receiving window
Marking notch
Display
;
=
%
&
(
PR 2-HS rotating laser 1
Laser beam (plane of rotation)
Rotating head
PRA 20 laser receiver display 7
@
;
=
%
&
(
Grip
Indicator showing the position of the receiver rela-
@
Control panel
tive to the height of the laser plane
Base plate with ⁵/₈" thread
PRA 84 Li‑ion battery
Battery status
;
=
Indication of distance from laser plane
Volume
%
Low battery indicator for the rotating laser
&
1
1 General information
1.1 Safety notices and their meaning
On the tool
DANGER
Draws attention to imminent danger that will lead to
serious bodily injury or fatality.
Laser Class 2 in accordance with IEC/EN 60825‑1:2007
en
WARNING
On the tool
Draws attention to a potentially dangerous situation that
could lead to serious personal injury or fatality.
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Draws attention to a potentially dangerous situation that
could lead to slight personal injury or damage to the
equipment or other property.
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Laser Class II according to CFR 21, § 1040 (FDA)
Location of identification data on the tool
NOTE
The type designation and serial number can be found on
the type identification plate on the tool. 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.
Draws attention to an instruction or other useful informa-
tion.
1.2 Explanation of the pictograms and other
information
Symbols
Type:
>1/4s
Generation: 01
Serial no.:
Read the
operating
General
warning
Return waste
material for
recycling.
Do not look
into the
instructions
before use.
beam.
For indoor
use only
Warning:
caustic
Warning:
electricity
Warning:
explosive
substances
substances
2 Description
2.1 Use of the product as directed
The PR 2-HS is a rotating laser that projects a rotating, visible laser beam. The rotating laser can be used horizontally
and for inclined planes.
The tool is designed to be used for determining, transferring and checking references in the horizontal and inclined
planes. Examples of uses are the transferring of datum lines and heights. The tool is designed for professional use and
may be operated, serviced and maintained only by trained, authorized personnel. This personnel must be informed of
any special hazards that may be encountered.
The tool and its ancillary equipment may present hazards when used incorrectly by untrained personnel or when used
not as directed.
Hilti supplies various accessories which allow the tool to be used with maximum efficiency.
To avoid the risk of injury, use only genuine Hilti accessories and insert tools.
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 appliance where there is a risk of fire or
explosion.
Modification of the tool is not permissible.
2
2.2 Features
The tool makes it possible for a single person to level or align in any plane quickly and with great accuracy.
The tool levels itself automatically after switching on. The laser beam is switched on only when the specified accuracy
has been achieved.
LEDs indicate the current operating status.
The tool is powered by a rechargeable Li‑ion battery which can be charged while the tool is in operation.
en
2.3 Digital distance measurement display
The laser receiver displays digitally the distance between the laser plane and the marking notch on the laser receiver.
This allows the user to determine the exact position of the receiver relative to the laser plane, with millimeter accuracy,
in a single operation.
2.4 Horizontal plane
After switching on, the tool levels itself automatically by way of two built-in servo motors.
2.5 Inclined plane (manual alignment in the desired plane of inclination)
The desired inclination can be set with the aid of the PRA 79 slope adapter. For further information on using the slope
adapter, please refer to the instruction sheet supplied with the PRA 79.
2.6 Shock warning
The shock warning function is activated one minute after the tool has leveled itself after switching on. The waiting time
of one minute begins again if a button is pressed within this first minute. The tool switches to warning mode if it is
brought out of level while in operation (due to vibration or an impact); all LEDs begin to blink and the laser switches
off (the head stops rotating).
2.7 Automatic cut-out
The laser does not switch on and all LEDs blink if the tool is set up outside its self-leveling range (±5°) or if movement
is blocked mechanically. The tool can be set up on a tripod with a 5/8" thread or stood directly on some other steady
surface (free of vibration). When automatic leveling is activated for one or both axes, the built-in servo system ensures
that the specified accuracy is maintained. The tool switches itself off when automatic leveling cannot be achieved (tool
set up outside its leveling range or physical impediment of the mechanism) or when knocked off level (see “Shock
warning” section).
NOTE
If the correct level cannot be achieved, the laser switches itself off and all LEDs blink.
2.8 Items supplied
1
1
1
1
1
1
2
2
1
PR 2-HS rotating laser
PRA 20 (02) laser receiver
PRA 80 or PRA 83 laser receiver holder
Operating instructions
PRA 84 Li‑ion battery
PUA 81 AC adapter
Batteries (size AA cells)
Manufacturer’s certificates
Hilti toolbox
2.9 Operating status indicators
The tool is equipped with the following operating status indicators: auto-leveling LED, battery charge status LED,
shock warning deactivation LED and inclined plane mode LED.
3
2.10 LED indicators
Auto-leveling LED
The green LED blinks.
The tool is in the leveling phase.
The green LED lights con-
The tool has leveled itself / is operating
stantly.
normally.
Shock warning deactivation LED
Inclined plane mode LED
All LEDs
The orange LED lights con-
stantly.
The shock warning function is deacti-
vated.
en
The orange LED lights con-
stantly.
Manual inclined plane mode is active.
All LEDs blink.
The tool has been bumped, knocked off
level or is exhibiting some error.
2.11 Charge status of the Li‑ion battery during operation
LEDs light constantly
LED 1, 2, 3, 4
LED 1, 2, 3
LED 1, 2
LED 1
-
LEDs blink
Charge status C
C ≧ 75 %
50 % ≦ C < 75 %
25 % ≦ C < 50 %
10 % ≦ C < 25 %
C < 10 %
-
-
-
-
LED 1
2.12 Charge status of the Li‑ion battery during charging while inserted in the tool
LEDs light constantly
LED 1, 2, 3, 4
LED 1, 2, 3
LED 1, 2
LED 1
-
LEDs blink
Charge status C
C = 100%
75 % ≦ C < 100 %
50 % ≦ C < 75 %
25 % ≦ C < 50 %
C < 25 %
-
LED 4
LED 3
LED 2
LED 1
2.13 Battery charging activity is shown on the battery display while charging the battery outside the tool.
If the red charging activity LED lights constantly, the battery is being charged.
If the red charging activity LED does not light, then either the charging operation is complete or the charger is providing
no current.
3 Accessories
Designation
Laser receiver
Laser receiver holder
Laser receiver holder
Height transfer device
Slope adapter
Short designation
PRA 20 (02)
PRA 80
PRA 83
PRA 81
PRA 79
AC adapter
PUA 81
Car charging connector
Battery
PUA 82
PRA 84
Battery
Tripod
PRA 84G
PUA 20
Crank tripod (elevator tripod)
PUA 30
4
Designation
Crank tripod (elevator tripod)
Automatic tripod
Short designation
PA 921
PRA 90
Telescopic staffs
PUA 50, PUA 55
en
4 Technical data
Right of technical changes reserved.
PR 2-HS
Receiving range (diameter)
With PRA 20 (02) laser receiver: 2…600 m (6.56…
1,968.5 ft)
Accuracy 1
Laser class
At 10 meters: ± 0.5 mm
Class 2, 620-690 nm; < 1 mW (EN 60825-1:2007 / IEC
60825-1:2007); Class II (CFR 21 § 1040 (FDA)); Maxi-
mum power < 4.85 mW at ≧ 300 r.p.m.
300/min ± 10%
Speed of rotation
Self-leveling range
Power source
Battery life
Operating temperature range
Storage temperature range (dry)
Protection class
± 5°
7.2 V / 4.5 Ah Li‑ion battery
Temperature +25°C (+77 °F), Li‑ion battery: ≥ 30 h
-20…+50°C (−4…+122 °F)
-25…+60°C (−13…+140 °F)
IP 66 (in accordance with IEC 60529); Not in “charging
during operation” mode
Tripod thread
⁵⁄₈" x 18
Weight (including the PRA 84)
Dimensions (L x W x H)
Drop test height 2
2.5 kg (5.51 lb)
200 mm (7.87") x 200 mm (7.87") x 230 mm (9.06")
1.5 m (4.92 ft)
1
Influences such as particularly high temperature fluctuations, dampness, shock, dropping, etc. can affect accuracy. Unless stated
otherwise, the tool was adjusted or calibrated under standard ambient conditions (MIL-STD-810G).
2
The drop test was carried out from a tripod, dropping onto flat concrete under standard ambient conditions (MIL-STD-810G).
PRA 20 (02)
Detection range (area diameter)
With the PR 2-HS (typical): 2…600 m (6.56…1,968.5 ft)
Signal tone generator
3 volume levels plus mute setting
Liquid-crystal display
On both sides
Indicator range, distance from zero
Laser plane display range
Length of the receiving window
Center indication from top edge of casing
Marking notches
± 52 mm
± 0.5 mm
120 mm (4.72")
75 mm (2.95")
On both sides
Time without detection before automatic power off
Dimensions (L × W × H)
Weight (including batteries)
Power source
15 min
160 mm (6.3") × 67 mm (2.64") × 24 mm (0.94")
0.25 kg (0.55 lb)
2 AA batteries
1
The drop test was carried out using the PRA 83 receiver holder, dropped onto flat concrete under standard ambient conditions
(MIL-STD-810G).
5
Battery life
Temperature +20°C (+68 °F): Approx. 50 h (depending
on the quality of the alkaline batteries used)
Operating temperature range
Storage temperature range
Protection class
-20…+50°C (−4…+122 °F)
-25…+60°C (−13…+140 °F)
IP 66 (in accordance with IEC 60529); Except the bat-
tery compartment
en
Drop test height 1
2 m (6.56 ft)
1
The drop test was carried out using the PRA 83 receiver holder, dropped onto flat concrete under standard ambient conditions
(MIL-STD-810G).
PRA 84 Li‑ion battery
Rated voltage (normal mode)
7.2 V
13 V
Maximum voltage (during operation or during charging
while in operation)
Rated current
Charging time
140 mA
Temperature +32°C (+90 °F): 2 h 10 min (battery 80%
charged)
Operating temperature range
Storage temperature range (dry)
-20…+50°C (−4…+122 °F)
-25…+60°C (−13…+140 °F)
+0…+40°C (+32…+104 °F)
Charging temperature range (also for charging during
operation)
Weight
0.3 kg (0.66 lb)
Dimensions (L x W x H)
160 mm (6.3") x 45 mm (1.77") x 36 mm (1.42")
PUA 81 AC adapter
AC supply
115…230 V
AC frequency
47…63 Hz
Rated power
36 W
Rated voltage
12 V
Operating temperature range
Storage temperature range (dry)
Weight
+0…+40°C (+32…+104 °F)
-25…+60°C (−13…+140 °F)
0.23 kg (0.51 lb)
Dimensions (L x W x H)
110 mm (4.33") x 50 mm (1.97") x 32 mm (1.26")
5 Safety instructions
5.1 Basic information concerning safety
In addition to the information relevant to safety given
in each of the sections of these operating instructions,
the following points must be strictly observed at all
times.
b) Stay alert, watch what you are doing and use com-
mon sense when operating the machine. Don’t
use the machine when you are tired or under the
influence of drugs, alcohol or medication. A mo-
ment of inattention while operating machines may
result in serious personal injury.
c) Keep laser tools out of reach of children.
5.2 General safety rules
d) Failure to follow the correct procedures when open-
ing the tool may cause emission of laser radiation in
excess of class 2 or, respectively, class 3. Have the
tool repaired only at a Hilti service center.
e) Do not operate the tool in explosive atmospheres,
such as in the presence of flammable liquids,
gases or dust. Tools and appliances create sparks
which may ignite the dust or fumes.
a) Do not render safety devices ineffective and do
not remove information and warning notices.
6
f) (Statement in accordance with FCC §15.21):
Changes or modifications not expressly approved
by the manufacturer can void the user’s authority to
operate the equipment.
the mains adapter may, under unfavorable condi-
tions, lead to electric shock. Dirty or dusty tools
should thus be checked at a Hilti service center
at regular intervals, especially if used frequently
for working on conductive materials.
g) Use of setting-up / adjusting devices and equipment
or operating procedures other than those specified in
these instructions may lead to exposure to hazardous
radiation.
z) Avoid touching the contacts.
en
5.2.1 Battery tool use and care
h) Check the condition of the tool before use. If the
tool is found to be damaged, have it repaired at a
Hilti service center.
i) Maintain the machine carefully. Check for mis-
alignment or binding of moving parts, breakage
of parts and any other condition that may affect
the machine’s operation. If damaged, have the
machine repaired before use. Poor maintenance is
the cause of many accidents.
a) Do not expose batteries to high temperatures or
fire. This presents a risk of explosion.
b) Do not disassemble, squash or incinerate batter-
ies and do not subject them to temperatures over
75°C. A risk of fire, explosion or injury through con-
tact with caustic substances may otherwise result.
c) Avoid ingress of moisture. Moisture in the interior
of the tool may cause a short circuit and chemical
reactions resulting in burns to the skin or fire.
j) The user must check the accuracy of the tool
after it has been dropped or subjected to other
mechanical stresses.
k) Check the tool before using it for important mea-
suring work.
l) Check the accuracy of the measurements several
times during use of the tool.
d) Under abusive conditions, liquid may leak from the
battery. Avoid contact. If contact accidentally oc-
curs, flush with water. In the event of the liquid
coming into contact with the eyes, rinse the eyes
with plenty of water and consult a doctor. Liquid
ejected from the battery may cause irritation or burns.
e) Do not use batteries other than those approved
for use with the applicable tool or appliance. Use
of other batteries or use of the battery for purposes
for which it is not intended presents a risk of fire and
explosion.
m) When the tool is brought into a warm environment
from very cold conditions, or vice-versa, allow it
to become acclimatized before use.
n) If mounting on an adapter, check that the tool is
screwed on securely.
o) Keep the laser exit aperture clean to avoid mea-
surement errors.
p) Although the tool is designed for the tough con-
ditions of jobsite use, as with other optical and
electronic instruments (e.g. binoculars, specta-
cles, cameras) it should be treated with care.
q) 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.
r) Keep the electrical contacts dry (protect from rain
or dampness).
f) Observe the special instructions applicable to the
transport, storage and use of Li-ion batteries.
g) 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 charg-
ing contacts. A short circuit at the battery terminals
or charging contacts could result in personal injury
(burns) or fire.
s) Use the mains adapter only for connecting to the
mains supply.
t) Check to ensure that the tool and mains adapter
do not present an obstacle that could lead to a
risk of tripping and personal injury.
h) Avoid short-circuiting the battery.Before inserting
the battery in the tool, check that the terminals of
the battery and the tool are free from foreign objects.
Short-circuiting the battery terminals presents a risk
of fire, explosion or contact with caustic substances.
i) Do not charge or continue to use damaged bat-
teries (e.g. batteries with cracks, broken parts,
bent or pushed-in and/or pulled-out contacts).
j) Use only the PUA 81 AC adapter, PUA 82 motor
vehicle power adapter or other chargers recom-
mended by the manufacturer to power the tool or
charge the battery. Failure to observe these points
may result in damage to the tool. Use of a charger
with batteries other than the specific type(s) for which
it is designed presents a risk of fire.
u) Ensure that the workplace is well lit.
v) Check the condition of the extension cord and re-
place it if damage is found. Do not touch the mains
adapter if the extension cord or mains adapter are
damaged while working. Disconnect the supply
cord plug from the power outlet. Damaged supply
cords or extension cords present a risk of electric
shock.
w) Avoid body contact with earthed or grounded
surfaces such as pipes, radiators, ranges and
refrigerators. There is an increased risk of electric
shock if your body is earthed or grounded.
x) Do not expose the supply cord to heat, oil or sharp
edges.
5.3 Proper organization of the work area
y) Never operate the mains adapter when it is dirty
or wet. Dust (especially dust from conductive ma-
terials) or dampness adhering to the surface of
a) Secure the area in which you are working and
take care to avoid directing the beam towards
7
other persons or towards yourself when setting
up the tool.
5.3.1 Electromagnetic compatibility
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).
b) Avoid unfavorable body positions when working
from ladders. Make sure you work from a safe
stance and stay in balance at all times.
c) Readings taken in the vicinity of reflective objects or
surfaces, through panes of glass or similar materials
may produce incorrect results.
en
d) Ensure that the tool is set up on a steady, level
surface (not subject to vibration).
e) Use the tool only within its specified limits.
f) When working in “charging during operation”
mode, attach the AC adapter in a secure posi-
tion, e.g. on a tripod.
5.3.2 Laser classification for Laser Class 2/Class II
tools
Depending on the version purchased, the tool com-
plies with Laser Class 2 in accordance with IEC825-
1:2007/EN60825-1:2007 and Class II in accordance with
CFR 21 § 1040 (FDA). This tool may be used without need
for further protective measures. The eyelid closure reflex
protects the eyes when a person looks into the beam un-
intentionally for a brief moment. This eyelid closure reflex,
however, may be negatively affected by medicines, alco-
hol or drugs. Nevertheless, as with the sun, one should
not look directly into sources of bright light. Do not direct
the laser beam toward persons.
g) Use of products for applications different from those
intended could result in hazardous situations. Use
the product and its accessories etc. in accor-
dance with these instructions and in the manner
intended for the particular type of product. Take
the working conditions and the work to be per-
formed into account.
h) Use of the telescopic staff in the vicinity of over-
head high voltage cables is not permissible.
6 Before use
NOTE
6.3.1 Charging a new battery for the first time
The tool may be powered only by a Hilti PRA 84 or PRA
84G battery.
Charge the battery fully before using it for the first time.
NOTE
Make sure the system to be charged is standing securely.
6.1 Fitting the battery 2
CAUTION
6.3.2 Recharging a battery
Before inserting the battery in the tool, check to
ensure that the battery terminals and the contacts in
the tool are free from foreign objects.
1. Check that the outer surfaces of the battery are
clean and dry.
2. Insert the battery in the tool.
NOTE Li‑ion batteries are ready for use at any time,
even when only partly charged.
1. Push the battery into the tool.
2. Turn the catch in a clockwise direction until the
“locked” symbol appears.
Charging progress is indicated by the LEDs when
the tool is switched on.
6.2 Removing the battery 2
6.4 Options for charging the battery
1. Turn the catch in a counter-clockwise direction until
the “unlocked” symbol appears.
2. Pull the battery out of the tool.
6.3 Charging the battery
DANGER
The PUA 81 AC adapter is for indoor use only. Avoid
ingress of moisture.
NOTE
Make sure that the recommended temperature range is
observed when charging (0 to 40°C).
DANGER
Use only the Hilti batteries and Hilti AC adapters listed
under “Accessories”. Use of tools or AC adapters which
show visible signs of damage is not permissible.
8
6.4.1 Charging the battery in the tool 3
6.5 Battery use and care
1. Insert the battery in the battery compartment (see
Store the battery in a cool, 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.
Batteries that have reached the end of their life must be
disposed of safely and correctly to avoid environmental
pollution.
6.1).
2. Rotate the socket cover until the charging socket on
the battery becomes visible.
3. Plug the cord from the AC adapter or motor vehicle
power adapter into the battery.
en
The battery will be charged.
4. Switch the tool on in order to display the charging
status while charging is in progress.
6.6 Switching the tool on
Press the on/off button.
NOTE
6.4.2 Charging the battery outside the tool 4
After switching on, the tool begins to level itself automat-
ically. The laser switches on when leveling is complete.
1. Remove the battery (see 6.2).
2. Connect the cord from the AC adapter or the motor
vehicle power adapter to the battery.
The red LED on the battery indicates charging ac-
tivity.
6.7 LED indicators
Please refer to section 2 “Description”.
6.4.3 Charging the battery while the tool is in
6.8 Inserting the batteries in the laser receiver 8
operation 3
DANGER
DANGER
Do not use damaged batteries.
Operation in “charging during operation” mode is not
permissible for outdoor use or in damp surroundings.
DANGER
Do not mix old and new batteries. Do not mix batteries of
different makes or types.
CAUTION
Avoid ingress of moisture. Moisture in the interior of
the tool may cause a short circuit and chemical reactions
resulting in burns to the skin or fire.
NOTE
The laser receiver may be powered only by batteries man-
ufactured in accordance with the applicable international
standards.
1. Rotate the socket cover until the charging socket on
the battery becomes visible.
2. Plug the cord from the AC adapter into the battery.
The tool continues to operate while charging and
battery charging status is indicated by the LEDs on
the tool.
1. Open the laser receiver battery compartment.
2. Insert the batteries in the laser receiver.
NOTE Check to ensure correct polarity when insert-
ing the batteries.
3. Close the battery compartment cover.
7 Operation
7.3 Working with the laser receiver
The laser receiver can be used at distances (radiuses) of
up to 300 m (1,000 ft). The laser beam is indicated by
visual and audible signals.
7.1 Checking the tool
Check the accuracy of the tool before using it for impor-
tant tasks, especially if it has been dropped or subjected
to unusual influences or impacts etc. (see 8.6).
7.3.1 Working with the laser receiver as a hand-
held unit
1. Press the on/off button.
2. Hold the laser receiver with the receiving window
directly in the plane of the rotating laser beam.
7.2 Switching the tool on
7.3.2 Working with the laser receiver in the PRA 80
Press the on/off button.
receiver holder 9
NOTE
1. Open the catch on the PRA 80.
After switching on, the tool begins to level itself automat-
ically.
2. Place the receiver in the PRA 80 receiver holder.
9
3. Close the catch on the PRA 80.
3. Use the “Volume” button to assign the more rapid
signal tone to the upper or lower area of the receiving
window.
4. Switch the receiver on by pressing the on/off button.
5. Turn the rotating grip to the open position.
6. Secure the PRA 80 receiver holder on the telescopic
staff or leveling staff by tightening the clamping
knob.
4. To save the settings, switch the laser receiver off.
NOTE Each setting that has been made becomes
effective the next time the tool is switched on.
7. Hold the receiver with the receiving window in the
plane of the rotating laser beam.
en
7.4 Deactivating the shock warning function
1. Switch the tool on (see 7.2).
7.3.3 Working with the laser receiver in the PRA 83
2. Press the “Deactivate shock warning” button.
The shock warning deactivation LED lights con-
stantly, indicating that the function has been deac-
tivated.
receiver holder 9
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.
3. To return to standard operating mode, switch the
tool off and then switch it back on again.
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.
7.5 Working in the horizontal plane
1. Set up the tool in a suitable position for the applica-
tion, e.g. on a tripod. Alternatively, the rotating laser
may be mounted on a wall bracket. The angle of
inclination of the surface on which it stands should
not exceed ± 5°.
3. Switch the receiver on by pressing the on/off button.
4. Turn the rotating grip to the open position.
5. Secure the PRA 83 receiver holder on the telescopic
staff or leveling staff by tightening the clamping
knob.
2. Press the on/off button.
6. Hold the receiver with the receiving window in the
plane of the rotating laser beam.
The auto-leveling LED blinks green.
The laser switches on, the beam begins to rotate
and the “auto leveling” LED lights as soon as the
tool has leveled itself.
7.3.4 Working with the PRA 81 height transfer
device 9
1. Open the catch on the PRA 81.
2. Insert the laser receiver in the PRA 81 height transfer
device.
7.6 Working with slopes (manual settings)
NOTE
3. Close the catch on the PRA 81.
4. Switch the laser receiver on by pressing the on/off
button.
Check that the slope adapter is fitted correctly between
the tripod and the tool (please refer to the operating
instructions for the PRA 79).
5. Hold the laser receiver with the receiving window
directly in the plane of the rotating laser beam.
6. Position the laser receiver so that the distance dis-
play shows “0”.
7.6.1 Setting up
1. Set up the PRA 79 slope adapter in a suitable
position for the application, e.g. on a tripod.
2. Position the tripod either at the upper edge or lower
edge of the inclined plane.
7. Use the measuring tape to measure the desired
distance.
3. Mount the rotating laser on the slope adapter and
bring it into alignment with the inclined plane, i.e.
parallel to the slope. The control panel of the PR 2-
HVS should face away from the direction of inclina-
tion.
7.3.5 Setting the measuring unit
The “Units” button can be used to set the desired accu-
racy of the digital display (mm/cm/off).
7.3.6 Volume adjustment
4. Make sure that the slope adapter is in the zero
position (0°).
When the receiver is switched on, the volume is set to
“normal”. The volume can be adjusted by pressing the
“Volume” button. One of four settings can be selected:
“Low”, “Normal”, “High” or “Off”.
7.6.2 Switching on
1. Switch the tool on (see 7.2).
2. Press the “Inclined plane manual mode” button.
The “Inclined plane mode” LED then lights on the
control panel of the rotating laser.
7.3.7 Menu options
1. Press and hold the on/off button for two seconds
when switching the laser receiver on.
The tool then begins automatic self-leveling. The
laser switches on and begins to rotate as soon as
this is complete.
The menu then appears in the display.
2. Use the “Measuring units” button to select metric or
imperial measuring units.
3. Now set the slope adapter to the desired angle of
inclination.
4. To return to standard operating mode, switch the
tool off and then switch it back on again.
10
8 Care and maintenance
8.1 Cleaning and drying
8.3 Storage
1. Blow dust off exit windows.
1. Remove the appliance from its case if it has be-
come wet. Dry and clean the tool, its transport
container and accessories (while observing the per-
missible temperature range). Repack the equipment en
only once it is completely dry.
2. Do not touch the glass 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.
2. Check the accuracy of the equipment before it is
used after a long period of storage or transportation.
3. Remove rechargeable and non-rechargeable batter-
ies from the tool or the laser receiver before storing
the units for long periods. The tool or laser re-
ceiver may suffer damage caused by leakage from
rechargeable or non-rechargeable batteries.
NOTE Abrasive cleaning materials may scratch the
glass and impair the accuracy of the laser tool.
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.
8.4 Transport
Use the Hilti toolbox or packaging of equivalent quality
for transporting or shipping your equipment.
CAUTION
8.2 Care of the Li-ion battery
Remove the batteries from the tool and receiver before
transport or shipping.
NOTE
A conditioning charge (as is required with NiCd or NiMH
batteries) is not necessary with Li-ion batteries
8.5 Calibration by the Hilti Calibration Service
NOTE
We recommend that the tool is checked by the Hilti
Calibration Service at regular intervals in order to ver-
ify its reliability in accordance with standards and legal
requirements.
Interruption of the charging procedure has no negative
effect on battery life.
NOTE
Use can be made of the Hilti Calibration Service at any
time, We recommend that the tool is calibrated at least
once a year
Charging can be started at any time with no negative
effect on battery life. There is no memory effect (as with
NiCd or NiMH batteries).
The calibration service provides confirmation that the
tool 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 speci-
fication, the used tool will be readjusted. After checking
and adjustment, a calibration sticker applied to the tool
and a calibration certificate provide written verification
that the tool operates in accordance with the manufac-
turer’s specification.
NOTE
For best results, batteries should be stored fully charged
in a cool dry place. Storing the battery in places subject
to high ambient temperatures (e.g. at a window) has an
adverse effect on battery life and increases the rate of
self-discharge.
NOTE
Calibration certificates are always required by companies
certified according to ISO 900x.
Batteries lose capacity due to aging and overstressing.
They can then no longer be fully charged. You may
continue to work with a battery that shows signs of
aging, but the battery should be replaced in good time.
The Hilti representative in your local region will be pleased
to provide further information.
8.6 Checking accuracy
1. Avoid ingress of moisture.
2. Charge the battery fully before using it for the first
time.
NOTE
In order to ensure compliance with the technical speci-
fications, the tool should be checked regularly (at least
before each major / relevant job).
3. Charge the battery as soon as its performance be-
gins to drop significantly.
NOTE Recharging in good time will increase the
service life of the battery.
NOTE
NOTE If use of the tool continues, further battery
discharge will be stopped automatically before the
battery cells suffer damage.
After falling and suffering an impact it can be presumed
that the tool will continue to operate faultlessly, with
the accuracy it achieved prior to the impact, when the
following conditions are met:
4. Charge the battery with the Hilti charger approved
for use with Li-ion batteries.
11
3. Use the laser receiver to catch the laser beam and
mark a point (point 1) on the wall.
The height of the fall did not exceed the height given in
the technical data.
4. Pivot the tool clockwise through 90° about its own
axis. In doing so, ensure that the height of the tool
does not change.
The tool suffered no obvious mechanical damage from
the impact (e.g. breakage of the pentaprism).
The tool projects a rotating laser beam when in operation.
The tool operated faultlessly before the impact.
5. Use the laser receiver to catch the laser beam and
mark a second point (point 2) on the wall.
en
6. Repeat steps 4 and 5 twice and mark points 3 and
4 on the wall with the aid of the laser receiver.
When this procedure is carried out carefully, the
vertical distance between the two marked points 1
and 3 (main axis) or, respectively, points 2 and 4
(transverse axis) should be less than 3 mm (at 20 m).
If the deviation is greater than this, the tool should
be returned to a Hilti Service Center for calibration.
8.6.1 Checking the main and transverse horizontal
axes 10
1. Set up the tripod approx. 20 m from a wall and level
the tripod head with a spirit level.
2. Mount the tool on the tripod and use the aiming
notch to aim the tool at the wall.
9 Disposal
WARNING
Improper disposal of the equipment may have serious consequences:
The burning of plastic components generates toxic fumes which may present a health hazard.
Batteries may explode if damaged or exposed to very high temperatures, causing poisoning, burns, acid burns or
environmental pollution.
Careless disposal may permit unauthorized and improper use of the equipment. This may result in serious personal
injury, injury to third parties and pollution of the environment.
Most of the materials from which Hilti tools or appliances are manufactured can be recycled. The materials must
be correctly separated before they can be recycled. In many countries, Hilti has already made arrangements for
taking back old tools and appliances for recycling. Ask Hilti customer service or your Hilti representative for further
information.
Dispose of the batteries in accordance with national regulations. Please help us to protect the environ-
ment.
10 Manufacturer’s warranty - tools
Hilti warrants that the tool supplied is free of defects in
material and workmanship. This warranty is valid so long
as the tool is operated and handled correctly, cleaned
and serviced properly and in accordance with the Hilti
Operating Instructions, and the technical system is main-
tained. This means that only original Hilti consumables,
components and spare parts may be used in the tool.
is not obligated for direct, indirect, incidental or con-
sequential damages, losses or expenses in connec-
tion with, or by reason of, the use of, or inability to
use the tool for any purpose. Implied warranties of
merchantability or fitness for a particular purpose are
specifically excluded.
For repair or replacement, send the tool or related parts
immediately upon discovery of the defect to the address
of the local Hilti marketing organization provided.
This warranty provides the free-of-charge repair or re-
placement of defective parts only over the entire lifespan
of the tool. Parts requiring repair or replacement as a
result of normal wear and tear are not covered by this
warranty.
This constitutes Hilti’s entire obligation with regard to
warranty and supersedes all prior or contemporaneous
comments and oral or written agreements concerning
warranties.
Additional claims are excluded, unless stringent na-
tional rules prohibit such exclusion. In particular, Hilti
12
11 FCC statement (applicable in US) / IC statement (applicable in Canada)
This device complies with part 15 of the FCC Rules and
RSS-210 of the IC. Operation is subject to the following
two conditions:
This device must accept any interference received, in-
cluding interference that may cause undesired operation.
NOTE
This device should cause no cause harmful interference.
Changes or modifications not expressly approved by
Hilti may restrict the user’s authorization to operate the
equipment.
en
13
Hilti Corporation
LI-9494 Schaan
Tel.: +423 / 234 21 11
Fax: +423 / 234 29 65
Hilti = registered trademark of Hilti Corp., Schaan
W 4270 | 0413 | 00-Pos. 2_USA | 1
Printed in Germany © 2013
Right of technical and programme changes reserved S. E. & O.
2067468 / A1
PR 2-HS Quick Guide
Basic Application
Deactivation:
Shock-Mode
3. Press Shock-Mode button to
deactivate Shock-Mode
1. Press ON/OFF
2. Shock-Mode activates
automatically after 1 minute
4. LED indicates Shock-Mode is
deactivated
3. If rotator is bumped, laser
stops rotating and all LEDs
activate
PRA 20 Settings
PRA 20 Menu
change the sound to beep
more rapidly above the PRA
30 center mark or below
Press to change
Volume (normal/
loud/ off /low)
change digital measurement
units from mm (Metric) to
inches (Imperial)
Press to change
units (1/8 / 1/16 /
off)
1
PR 2-HS I MMR I BU MS
PR 2-HS Quick Guide
Keyboards:
LED Slope Mode On
LED Shock Warning
deactivated
Units
(cm/mm)
Volume
Slope Mode
Button
Shock Warning
Button
On/Off
On/Off
LED Leveling
Battery Status
When laser starts to rotate, turn slope
screw on slope adapter to set desired
inclination.
Slope
Mount PRA 79
2. Press Slope
Mode key
Slope Adapter &
PR 2-HS on Tripod
3. Wait for
leveling
1. Press
ON/OFF
Set slope adapter
to 0%.
2
PR 2-HS I MMR I BU MS
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