Hilti PR 35 Instrucțiuni de utilizare

PR 35

Operating instructions en

Mode d’emploi fr

Οδηγιες χρησεως el

Használati utasítás hu

Instrukcja obsługi pl

Инструкция по зксплуатации ru

Návod k obsluze cs

Návod na obsluhu sk

Upute za uporabu hr

Navodila za uporabo sl

Ръководство за обслужване bg

Instrucţiuni de utilizare ro

Kulllanma Talimatı tr

Lietošanas pamācība lv

Instrukcija lt

Kasutusjuhend et

IНСТРУКЦIЯ З ЕКСПЛУАТАЦIЇ uk

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Printed: 08.07.2013 | Doc-Nr: PUB / 5070235 / 000 / 01

ORIGINAL OPERATING INSTRUCTIONS

PR 35 rotating laser

It is essential that the operating instructions

are read before the tool is operated for the

first time.

Always keep these operating instructions to-

gether with the tool.

Ensure that the operating instructions are

with the tool when it is given to other persons.

Contents Page

1 General information 2

2Description 2

3 Accessories 4

4 Technical data 5

5 Safety instructions 6

6Beforeuse 7

7 Operation 9

8 Care and maintenance 12

9 Troubleshooting 13

10 Disposal 13

11 Manufacturer’s warranty - tools 14

12 EC declaration of conformity (original) 15

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.

In these operating instructions, the designation “the tool”

or “the rotating laser” always refers to the Hilti PR 35.

The designation “remote control / laser receiver” always

refers to the Hilti PRA 35.

Rotating laser 1

@

Laser beam (plane of rotation)

;

Rotating head

=

Grip

%

Control panel

&

Battery

(

Battery compartment

)

Base plate with 5/8" thread

+

Battery status indicator LED

§

Catch

/

Charging cord socket

Rotating laser control panel 2

@

On / off button

;

Auto-leveling LED

=

Direction buttons

%

Shock warning deactivation LED

&

Surveillance mode LED

(

Slope LED

)

Line function button

+

Speed of rotation button

§

Battery status

PRA 35 control panel (on the front of the receiver) 3

@

On/off button

;

Special line function (double click)

=

Units button

%

Volume button

&

Automatic alignment button (double click)

(

Surveillance mode button (double click)

)

Receiving window

+

Marking notch

§

Display

PRA 35 control panel (on the rear of the remote con-

trol) 4

@

Sleep mode button

;

Speed of rotation button

=

Line function button

%

Direction buttons (up/down)

&

Direction buttons (left / right)

(

Button lock (double click)

PRA 35 display 5

@

Position of the receiver relative to the height of the

laser plane

;

Battery status

=

Volume

%

Button lock

&

Distance of receiver from laser plane

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1 General information

1.1 Safety notices and their meaning

DANGER

Draws attention to imminent danger that will lead to

seriousbodilyinjuryorfatality.

WARNING

Draws attention to a potentially dangerous situation that

could lead to serious personal injury or fatality.

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

Symbols

Read the

operating

instructions

before use.

General

warning

Warning:

caustic

substances

Warning:

electricity

For indoor

use only

Return waste

material for

recycling.

Do not look

into the

beam.

Type identification plate

PR 35

Po = average radiant power of a pulsating laser, laser

wave length 620-690nm, modulation frequency 1MHz,

pulse cycle 50%, diameter of bundled laser beam at the

pentaprism 5mm, speed of rotation 300 U/Min. Under

the conditions listed above, the average output power is

<4.85 mW.

Location of identification data on the tool

The type designation and serial number can be found on

thetypeidentificationplateonthetool.Makeanoteof

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 tool is designed to be used to determine, transfer and check levels, verticals, slopes and right angles. Examples of

its uses are: transferring datums and height marks, determining right angles for walls, vertical alignment on reference

points and setting out slopes.

Use of tools or AC adapters which show visible signs of damage is not permissible. Operation outdoors or in damp

conditions in “Charging during operation mode” is not permissible.

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 PR 35 rotating laser

The Hilti PR 35 is a rotating laser tool with a visible rotating laser beam and a reference beam set at 90° to the main

beam. The PR 35 can be used for alignment in the vertical, horizontal and inclined planes.

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2.3 Features

Thetoolmakesitpossibleforasinglepersontoleveloraligninanyplanequickly and with great accuracy.

The tool levels itself automatically after switching on. The laser beam is emitted only when the specified accuracy has

been achieved.

LEDs indicate the tool’s current operating status.

The tool is powered by a rechargeable Li‑ion battery which can be charged while the tool is in operation.

2.4 PRA 35 combined remote control and laser receiver

The PRA 35 is a combined remote control unit and laser receiver. It can be used to control the PR 35 rotating laser

over great distances. The PRA 35 also serves as a laser receiver and can thus be used to detect and indicate the laser

beam at great distances.

2.5 Digital distance measurement display

The PRA 35 shows the distance between the laser plane and the marking notch onthePRA35inthedigitaldisplay.

This allows the user to determine the exact position of the receiver relative to the laser plane, with millimeter accuracy,

inasingleoperation.

2.6 Speed of rotation / line function

3 speeds of rotation are available for use (300, 600, 1500 /min). It is possible to switch between the individual functions

such as rotation and line functions. This is possible with the PR 35 rotating laser and with the PRA 35.

The line function improves laser beam visibility and limits the laser beam to a certain working area.

2.7 Automatic alignment and surveillance

Using the PR 35 and the PRA 35, a single person can align the laser plane automatically with a certain point with great

accuracy. When required, the laser plane can be checked at regular intervals with the aid of the surveillance function

and the PRA 35 in order to avoid possible deviations due to temperature fluctuations, wind or similar.

2.8 Digital slope display with patented electronic axis alignment

The digital slope display can indicate a slope of up to 15%. This makes it possible to set out and check slopes without

having to make any calculations. Axis alignment can be used to optimize slope accuracy.

2.9 Shock warning

The tool goes into warning mode if it is knocked off level (due to vibration or impact) while in operation: all LEDs blink

and the laser switches off (the laser head no longer rotates).

2.10 Automatic cut-out

The laser does not switch on and all LEDs blink if the tool is set up outside its self-leveling range or movement is

blocked mechanically.

After switching the tool on, the shock warning only becomes active 1 minute after completion of leveling. If a button is

pressed within this time (before 1 minute has elapsed), the 1 minute delay before activation begins again.

2.11 Items supplied

1 PR 35 rotating laser

1 Remote control / laser receiver

1 Receiver holder

1 PR 35 operating instructions

1Targetplate

1 Manufacturer’s certificate

1 PRA 84 Li‑ion battery

1 PRA 85 AC adapter

1 Hilti toolbox

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2.12 Operating status indicators

Operating status is indicated as follows: auto-leveling LED, battery statusLED,shockwarningLEDandslopeLED.

2.13 LED indicators

Auto-leveling LED (green) The green LED blinks. The tool is in the leveling phase.

The green LED lights con-

stantly.

The tool has leveled itself / is operating

normally.

Shock warning LED (orange) The orange LED lights con-

stantly.

Shock warning mode is deactivated.

Surveillance LED (orange) The LED lights orange. The tool is in surveillance mode.

Slope LED (orange) The orange LED blinks. Alignment in the sloping plane.

TheorangeLEDlightscon-

stantly.

Slope mode is active.

Several LEDs light 2 LEDs blink orange. The tool is in axis alignment (slope)

mode.

All LEDs All LEDs blink The tool has been bumped, knocked off

level or is exhibiting some other error.

2.14 Charge status of the Li‑ion battery during operation

LEDs light constantly LEDs blink

Charge status C

LED 1,2,3,4

-

C≧75%

LED 1,2,3

-

50 % ≦ C < 75 %

LED 1,2

-

25 % ≦ C < 50 %

LED 1

-

10 % ≦ C < 25 %

-

LED 1

C<10%

2.15 Charge status of the Li‑ion battery during charging while inserted in the tool

LEDs light constantly LEDs blink

Charge status C

LED1,2,3,4

-

C=100%

LED1,2,3 LED4

C≧75%

LED1,2 LED3

50 % ≦ C < 75 %

LED1 LED2

25 % ≦ C < 50 %

-

LED 1

C<25%

2.16 Charge status of the Li‑ion battery during charging while not inserted in the tool

If the red LED lights constantly, the battery is being charged.

If the red LED doesn’t light, the battery is fully charged.

3 Accessories

Designation Description

Remote control / laser receiver PRA 35

Laser receiver PRA 38, PRA 30/31

Target plate PRA 50/51

Wall mount PRA 70/71

Slope calculator PRA 52

Slope adapter PRA 78

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Designation Description

Car charging connector PRA 86

Height transfer device PRA 81

AC adapter PRA 85

Battery PRA 84

Vertical angle PRA 770

Batter board receiver holder PRA 751

Batter board adapter PRA 750

Facade adapter PRA 760

Various tripods PUA 20, PUA 30, PA 921, PA 931/2

Telescopicstaffs PUA50,PUA55/56,PA961,PA962

4 Technical data

Right of technical changes reserved.

PR 35

PR 35 receiving range (diameter) Typical distance with PRA 35: 2…300 m (6...900 ft)

Range of remote control (circle diameter) Typical distance with PRA 35: 0…200 m (0...660 ft)

Accuracy 0.75 mm per 10 m horizontal distance

(77° F, ¹/₃₂" in 32 ft) at a temperature of 25°C

Plumb beam Continuous, perpendicular to the plane of rotation

PR 35 laser class Class 2, (class II), 620-690 nm / Po < 4.85

mW, ≧ 300 /min (EN 60825-1:2008 / IEC

825 - 1:2008); class II (CFR 21 § 1040

(FDA))

Speed of rotation 300, 600, 1500 /min

Slope range

one axis, -15% / +8,6% (-8,6° / +5°)

Self-leveling range ±5°

Powersource 7.2V/4.5AhLi‑ionbattery

Battery life Temperature +20°C (+68°F), Li‑ion battery: ≥ 30 h

Operating temperature range -20…+50°C (-4°F to 122°F)

Storage temperature range (dry) -25…+60°C (-13°F to 140°F)

Protection class IP 56 (in accordance with IEC 60529) (not in “charging

during operation” mode)

Tripod thread ⁵⁄₈" X 11

Weight (incl. PRA 84) 2.4 kg (5.3 lbs)

Dimensions (L x W x H) 252 mm X 252 mm X 209 mm (10" x 10" x 8")

PRA 84 Li‑ion battery

Rated voltage (normal mode) 7.2 V

Maximum voltage (during operation or during charging

while in operation)

13 V

Rated current 160 mA

Charging time

2 h / +32°C / Battery is 80% charged

Operating temperature range -20…+50°C (-4°F to 122°F)

Storage temperature range (dry) -25…+60°C (-13°F to 140°F)

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Charging temperature range (also for charging during

operation)

+0…+40°C (32° to +104°F)

Weight 0.3 kg (0.67 lbs)

Dimensions (L x W x H) 160 mm X 45 mm X 36 mm (6.3" x 1.8" x 1.4")

PRA 85 AC adapter

AC supply 115…230 V

AC frequency 47…63 Hz

Rated power 40 W

Rated voltage 12 V

Operating temperature range +0…+40°C (32°F to +104°F)

Storage temperature range (dry) -25…+60°C (-13°F to 140°F)

Weight 0.23 kg (0.51 lbs)

Dimensions (L x W x H) 110 mm X 50 mm X 32 mm (4.3" x 2" x 1.3")

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.

5.2 General safety rules

a) Do not render safety devices ineffective and do

not remove information and warning notices.

b) Keep laser tools out of reach of children.

c) Failure to follow the correct procedures when open-

ing the tool may cause emission of laser radiation in

excess of class 2. Have the tool repaired only at a

Hilti Service Center.

d) Take the influences of the surrounding area into

account. Do not use the tool where there is a risk

of fire or explosion.

e) (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.

5.3 Proper organization of the work area

a) Secure the area in which you are working and

take care to avoid directing the beam towards

other persons or towards yourself when setting

up the tool.

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) Measurements taken through panes of glass or other

objects may be inaccurate.

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) Check that your PR 35 is responding only to your

PRA 35 and not to other PRA 35s that may be in use

on the jobsite.

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).

5.3.2 Laser classification for laser class II

appliances

The tool complies with Laser Class 2 in accordance

with IEC825-1:2008 / EN60825-1:2008 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 unintentionally for a brief moment.

This eyelid closure reflex, however, may be negatively

affected by medicines, alcohol 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.

5.4 General safety rules

a) Check the condition of the tool before use. If the

tool is found to be damaged, have it repaired at a

Hilti service center.

b) The user must check the accuracy of the tool

after it has been dropped or subjected to other

mechanical stresses.

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c) When the tool is brought into a warm environment

from very cold conditions, or vice-versa, allow it

to become acclimatized before use.

d) If mounting on an adapter, check that the tool is

screwed on securely.

e) Keep the laser exit aperture clean to avoid meas-

urement errors.

f) Although the tool is designed for the tough condi-

tions of jobsite use, as with other optical and elec-

tronic instruments (e.g. binoculars, spectacles,

cameras) it should be treated with care.

g) 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.

h) Check the tool before using it for important meas-

uring work.

i) Check the accuracy of the measurements several

times during use of the tool.

j) Use the AC adapter only for connecting to the AC

supply.

k) Check to ensure that the tool and AC adapter do

not present an obstacle that could lead to a risk

of tripping and personal injury.

l) Ensure that the workplace is well lit.

m) Check the condition of the extension cord and

replace it if damage is found. Do not touch the AC

adapter if the extension cord or AC 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.

n) 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.

o) Do not expose the supply cord to heat, oil or sharp

edges.

p) Never operate the AC adapter when it is dirty or

wet. Dust (especially dust from conductive ma-

terials) or dampness adhering to the surface of

the AC 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.

q) Avoid touching the contacts.

5.4.1 Battery tool use and care

a) Check that the tool is switched off before fitting

the battery. Use only the Hilti battery approved for

use with this tool.

b) Do not expose batteries to high temperatures or

fire. This presents a risk of explosion.

c) 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.

d) Avoid ingress of moisture. Moisture may cause a

short circuit resulting in a risk of burning injury or fire.

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.

f) Observe the special instructions applicable to the

transport, storage and use of Li-ion batteries.

g) 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.

h) 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).

i) Use only the specified battery to power the tool

and use only the PRA 85 AC adapter or PRA 86

car charging connector for charging. Failure to

observe these points may result in damage to the

tool.

6Beforeuse

NOTE

The PR 35 may be powered only by the Hilti PRA 84

battery.

6.1 Charging the battery

DANGER

Use only the Hilti battery, car charging connector and

Hilti AC adapter listed under “Accessories”.

6.1.1 Charging a new battery for the first time

Charge the battery fully before using it for the first time.

NOTE

Make sure the system to be charged is standing securely.

6.1.2 Charging a previously used battery

Ensure that the outer surfaces of the battery are clean

and dry before inserting it in the tool.

Li-ion batteries are ready for use at any time, even when

only partly charged. During charging, progress is indic-

ated by the LEDs on the tool.

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6.2 Options for charging the battery

DANGER

The PRA 85 AC adapter is for indoor use only. Avoid

ingress of moisture.

6.2.1 Charging the battery in the tool 67

NOTE

When charging, check that the temperature is within the

recommended charging temperature range (0 to 40°C/

32 to 104°F).

1. Insert the battery in the battery compartment.

2. Turn the catch so that the charging cord socket on

the battery pack is visible.

3. Connect the charging cord from the AC adapter or

car charging connector to the battery.

4. During charging, the charge status is indicated by

the battery status LEDs on the tool (the tool must be

switched on).

6.2.2 Charging the battery outside the tool 8

NOTE

When charging, check that the temperature is within the

recommended charging temperature range (0 to 40°C/

32 to 104°F).

1. Remove the battery from the tool and connect it to

the AC adapter or car charging connector.

2. The red LED on the battery lights while charging is

in progress.

6.2.3 Charging the battery while the tool is in

operation 8

CAUTION

Avoid ingress of moisture. Moisture may cause a short

circuit resulting in a risk of burning injury or fire.

1. Swing the cover to the side so that the charging

cord socket becomes accessible.

2. Connect the charging cord from the AC adapter to

the battery.

3. The tool continues to operate while charging is in

progress.

4. During charging, the charging status is indicated by

the LEDs on the tool.

6.3 Battery use and care

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 a motor

vehicle windscreen. Batteries that have reached the end

of their life must be disposed of safely and correctly to

avoid environmental pollution.

6.4 Fitting the battery 6

CAUTION

Before inserting the battery in the tool, check that

the terminals of the battery and the tool are free from

foreign objects.

1. Push the battery into the tool.

2. Turn the catch in a clockwise direction to the second

detent (the “locked” symbol is displayed).

6.5 Removing the battery 9

1. Turn the catch in a counterclockwise direction from

the second position back to the “open” position (the

“unlocked” symbol is displayed).

2. Pull the battery out of the tool.

6.6 Switching the tool on

Press the “On / off” button.

NOTE

After switching on, the tool begins the automatic leveling

process (takes max. 40 seconds). After completion of the

leveling process, the laser beam switches on and begins

to rotate in the normal direction. When leveling in the

horizontal plane the laser head rotates automatically at

medium speed and, when working in the vertical plane, a

reference point is projected downwards.

6.7 LED indicators

Please refer to section 2 “Description”.

6.8 Inserting batteries in the PRA 35 

CAUTION

Do not use damaged batteries.

DANGER

Do not mix old and new batteries. Do not mix batteries of

different makes or types.

NOTE

The PRA 35 may be powered only by batteries manu-

factured in accordance with the applicable international

standards.

6.9 Pairing

NOTE

In the state supplied, the PR 35 rotating laser and the

PRA 35 remote control / laser receiver have not been

paired. They cannot operate together until they have

been paired.

The PR 35 rotating laser and the PRA 35 must be set

to operate as a pair before they can be used together.

Pairing the tools means that they are configured to com-

municate with each other. The PR 35 rotating laser then

receives signals only from the PRA 35 with which it has

been paired. Pairing makes it possible to work alongside

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other rotating lasers without risk of settings being altered

inadvertently by these tools.

1. Press the on/off buttons on the PR 35 rotating laser

and on the PRA 35 simultaneously and keep them

pressed for at least 3 seconds.

When pairing has been carried out successfully, a

signal tone is emitted by the PRA 35 and all LEDs

on the PR 35 rotating laser blink.

2. Switch off the tools that have been paired and then

switch them on again.

The “paired” symbol appears in the display (see

“Troubleshooting” section).

7Operation

7.1 Switching the tool on

Press the “On / off” button.

NOTE

After switching on, the tool begins to level itself automat-

ically.

7.2 Working with the PRA 35

The PRA 35 is a laser receiver (front) and, at the same

time, a remote control unit (rear). The remote control

makes working with the rotating laser more convenient

and is required in order to make use of certain functions.

The receiver works best with a speed of 600 /min and

should not be used with a speed of 1500 /min.

7.2.1 Working with the laser receiver as a hand-

held unit

1. Press the “On / off” button.

2. Hold the PRA 35 in the plane of the rotating laser

beam.

The laser beam is indicated by visual and audible

signals.

7.2.2 Using the PRA 35 in the PRA 80 receiver

holder 

1. Open the catch on the PRA 80.

2. Place the PRA 35 in the PRA 80 receiver holder.

3. Close the catch on the PRA 80.

4. Switch the laser receiver on by pressing the “On /

off” button.

5. Turn the rotating grip to the open position.

6. Fit the PRA 80 receiver holder onto the telescopic

staff or leveling staff and secure it by tightening the

rotating grip.

7. Hold the PRA 35 with the receiving window in the

plane of the rotating laser beam.

The laser beam is indicated by visual and audible

signals.

7.2.3 Working with the PRA 81 height transfer

device 

1. Open the catch on the PRA 81.

2. Insert the PRA 35 laser receiver in the PRA 81 height

transfer device.

3. Close the catch on the PRA 81.

4. Switch the PRA 35 on by pressing the “On/off”

button.

5. Hold the PRA 35 with the receiving window in the

plane of the rotating laser beam.

6. Position the PRA 35 so that the distance display

shows “0”.

7. Use the measuring tape to measure the desired

distance.

7.2.4 Menu options

Press the “On/off” button for 2 seconds when switching

the PRA 35 on.

The menu then appears in the display.

Use the “Measuring units” button to select metric or

imperial measuring units.

Use the volume button to assign the more rapid signal

tone to the upper or lower area of the receiving window.

To access the extended menu, press the “Button lock”

button on the rear of the PRA 35. Use the direction

buttons (left/right) to make further selections from the

menu: e.g. adjust PR 35 shock sensitivity, cancel pairing

or switch off wireless operation.

Settings that affect the PR 35 become effective only

when the PR 35 is switched on and in wireless contact.

The direction buttons (up/down) are used to change

the settings. Each setting then becomes effective and

remains effective the next time the tool is switched on.

To save the settings, switch the PRA 35 off.

7.2.5 Setting the measuring unit

The “units” button can be used to set the desired meas-

uring unit according to the country of use (mm / cm / off)

or (¹⁄₈in / ¹⁄₁₆in / off).

7.2.6 Setting the volume of the signal tone

The tool is set to “Normal” volume when switched on. The

volume can be adjusted by pressing the “Signal tone”

button. One of the following settings can be selected:

“Low”, “Normal”, “High” or “Off”.

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7.2.7 Button lock and double click

The button lock function of the PRA 35 prevents uninten-

tional entries being made and is indicated at the upper left

edge of the display on both sides of the PRA 35. The lock

symbol is either open (unlocked) or closed (locked). In

order to avoid incorrect operation, the “Automatic align-

ment”, “Surveillance” and “Special line” commands must

be confirmed by a double click. For the sake of simpli-

city, this is not mentioned each time in further sections of

these operating instructions.

7.3 Basic functions of the PR 35

The basic functions are horizontal and vertical alignment

plus working with slopes.

7.3.1 Setting the speed of rotation

NOTE

The speed of rotation can be adjusted by pressing the

“Speed of rotation” button (on the control panel of the

rotating laser or on the PRA 35). The speeds of rotation

are: 300, 600 and 1500 /min. The receiver works best

at 600 /min and should not be used at a speed of 1500

/min.

7.3.2 Selecting the line function

NOTE

When the “Line” button is pressed, the rotating laser

projects a line which can be lengthened or shortened by

further presses of the button.

NOTE

With the aid of the PRA 35 laser receiver it is also possible

to stop rotation of the laser and to project a line at the

position of the PRA 35. To do this, move the PRA 35 laser

receiver into the plane of the laser beam and press the

“Special line” button twice (double click).

7.3.3 Moving the laser line

The laser line can be moved to the left or right by pressing

the “Direction” buttons (PR 35 or PRA 35). Holding down

the button results in continuous movement and increases

the speed of movement of the laser line.

7.4 Working in the horizontal plane 

7.4.1 Setting up

1. Set up the tool in a suitable position for the applica-

tion, e.g. on a tripod. The angle of inclination of the

surface on which it stands should not exceed ± 5°.

2. Press the “On/off” button.

3. The laser beam switches on and the head begins to

rotate at a speed of 300 /min as soon as the tool

has leveled itself.

7.5 Working in the vertical plane 

1. When working in the vertical plane, place the tool

on its metal feet so that the control panel faces

upwards. Alternatively, the rotating laser may also be

mounted on a suitable tripod, wall bracket, facade

adapter or batter board adapter.

2. Adjust the tool so that its vertical axis is positioned

in the required direction.

3. In order to ensure that the tool’s specified accuracy

can be maintained, make sure that it is set up on

a level surface or mounted sufficiently level on the

tripod or other accessory.

4. Press the “On / off” button.

After the tool has leveled itself automatically, it pro-

jects a stationary laser beam vertically downwards.

This projected point is the reference point and is

used to position the tool.

7.5.1 Manual alignment

Manual alignment of the vertical plane is carried out by

pressing the direction buttons (up/down) on the rear of

the PRA 35.

7.5.2 Auto-alignment

Hold the PRA 35 at the point to be aligned, with the

receiving side facing the PR 35, and then press the

“Automatic alignment” button.

The laser plane alignment procedure then begins. A con-

stant signal tone is emitted while this is taking place.

The direction of the search can be changed by pressing

the “Automatic alignment” button.

The alignment procedure can be canceled by a double

click.

As soon as the laser beam strikes the receiving window

of the PRA 35, the beam moves to the position of the

marking notch (reference plane).

A short signal tone is emitted, indicating the end of the

procedure, as soon as the laser beam finds the position

of the marking notch.

7.6 Working with slopes

NOTE

For optimum results, check that the PR 35 is correctly

aligned. This is best done by selecting 2 points each 5 m

to the left and right of the tool but parallel to the tool axis.

Mark the height of the horizontal plane and then, after

setting the slope, mark the heights. The tool is aligned

optimally only when these heights are identical at both

points.

7.6.1 Setting up

NOTE

The slope can be set manually, automatically, or by using

the PRA 76/78 slope adapter.

1. Set up the tool in a suitable position for the applica-

tion, e.g. on a tripod.

2. With the aid of the target notch on the head of the

PR 35, bring the tool parallel to the inclined plane.

3. Press the “On / off” button for at least 8 seconds

until the orange LED lights.

4. The laser beam switches on as soon as the tool has

leveled itself. The PRA 35 can then be set to the

desired slope.

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7.6.2 Setting the slope manually

Press the direction buttons (up/down) on the PRA 35

remote control. Pressing the arrow buttons for longer

causes the values to change more quickly.

The LED display on the PRA 35 shows the angle of slope.

If no button is pressed for 3 seconds, the tool will be set

to the most recently displayed value.

7.6.3 Setting the slope automatically

NOTE

The slope can be set automatically only when slope mode

is active and when a PRA 35 laser receiver is used.

Incline the laser as described at 7.5.2, but in alignment

with the inclined plane.

7.6.4 Optional electronic alignment

After setting the slope as described above, alignment of

the PR 35 can be optimized by Hilti’s patented electronic

alignment system.

1. Position the PRA 35 centrally opposite the PR 35 at

the end of the inclined plane. It can be held still by

hand or fixed in place with the aid of the PRA 80.

2. Switch the PRA 35 on.

3. Activate electronic alignment on the PR 35 by press-

ing the “Left” arrow button.

4. If the shock warning / slope LEDs blink, the PRA 35

is not receiving the laser beam from the PR 35.

5. If the shock warning / surveillance LEDs blink, realign

the PR 35 by moving it counterclockwise.

6. If the slope / surveillance LEDs blink, realign the

PR 35 by moving it clockwise.

7. If the surveillance LED blinks, alignment is correct.

8. End electronic alignment mode by pressing the

“Right” arrow button.

7.6.5 Setting the slope with the aid of the

PRA 76/78 slope adapter

NOTE

Check that the slope adapter is fitted correctly between

the tripod and the tool (please refer to the operating

instructions).

7.7 Surveillance

The surveillance function checks at regular intervals

whether the plane that is set (vertical, horizontal or in-

clined) has been altered inadvertently (e.g. by vibration).

If this is the case, the projected plane will be realigned to

the zero point (i.e. the marking notch on the PRA 35) (so

long as it is still within the receiving window). A PRA 35 is

required for use of the surveillance function. An additional

laser receiver can be used to detect the laser beam while

the laser beam is being monitored.

1. Preparation for activation of the surveillance function

is basically the same as the procedure for activation

of automatic alignment mode.

2. Position the tool at the desired starting point 1 and

switch it on.

3. Position the PRA 35 laser receiver at the reference

point (point 2) on the axis and secure it there. The

tool (point 1) and the PRA 35 (point 2) then form

anchor points on the plane. Take care to ensure that

the marking notch on the PRA 35 is at exactly the

height at which the rotating laser is later to project

the laser line or point. The red laser receiving surface

on the PRA 35 must face the rotating laser.

4. Take care to ensure there are no obstructions

between the rotating laser and the PRA 35 laser

receiver which could interfere with communication

between the devices. Glass and other translucent

materials may also interfere with communication

between the devices. Reflections from windows may

also cause interference.

5. Switch the PR 35 and the PRA 35 on. Surveillance

mode can be activated by double clicking the “Sur-

veillance mode” button on the PRA 35.

A further click is used to change the search direction

and a double click ends surveillance mode.

6. The system is then in surveillance mode. The mode

is indicated in display of the PRA 35.

7. The surveillance system checks at regular intervals

whether the laser plane has shifted. If it is found to

have shifted, the laser plane will be readjusted to the

original marking plane as far as possible. An error

message is displayed if the marking plane is outside

the leveling range of ±5° or if direct line of sight

between the rotating laser and the laser receiver is

obstructed for a long period.

7.8 Returning to standard mode

In order to return to standard mode, horizontal alignment,

300 /min, the tool must be switched off and restarted.

7.9 Sleep mode

ThePR35savespowerwheninsleepmode.Thelaseris

switched off, thereby extending battery life.

Activate sleep mode by pressing the “Sleep mode” button

on the PRA 35.

Deactivate sleep mode by pressing the “Sleep mode”

button on the PRA 35 again.

After reactivating the PR 35, check the laser settings in

order to ensure accuracy.

7.10 Working with the target plate

The target plate improves laser beam visibility. The target

plate should be used in bright conditions or whenever

improved laser beam visibility is desired. Simply bring the

target plate into the plane of the projected laser beam.

The target plate is made from a material that makes the

laser beam more easily visible.

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8 Care and maintenance

8.1 Cleaning and drying

1. Blow dust off the lenses.

2. Donottouchtheglasswiththefingers.

3. Useonly a clean, soft cloth for cleaning. If necessary,

moisten the cloth slightly with pure alcohol or a little

water.

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. Observe the temperature limits when storing your

equipment. This is particularly important in winter

/summeriftheequipmentiskeptinsideamotor

vehicle (-30°C to +60°C).

8.2 Storage

Remove the tool from its case if it has become wet.

The tool, its carrying case and accessories should be

cleaned and dried (at maximum 40°C / 104°F). 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.

Store the tool in the Hilti toolbox in a dry place.

8.3 Transport

Use the Hilti toolbox or packaging of equivalent quality

for transporting or shipping your equipment.

CAUTION

Always remove the batteries before shipping the tool.

8.4 Hilti Calibration Service

We recommend that the tool is checked by the Hilti Cal-

ibration Service at regular intervals in order to verify its

reliability in accordance with standards and legal require-

ments.

Use can be made of the Hilti Calibration Service at any

time, but checking at least once a year is recommended.

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.

The tool will be readjusted if deviations from the man-

ufacturer’s specification are found. 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 manufacturer’s

specification.

Calibration certificates are always required by companies

certified according to ISO 900x.

Your local Hilti Center or representative will be pleased

to provide further information.

8.4.1 Checking accuracy

In order to ensure compliance with the technical spe-

cifications, the tool should be checked regularly (at least

before each major / relevant job).

8.4.1.1 Checking the main and transverse

horizontal axes 

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.

3. Use the receiver to catch the laser beam and mark

a point (point 1) on the wall.

4. Pivot the tool clockwise through 90° about its own

axis. In doing so, ensure that the height of the tool

does not change.

5. Use the laser receiver to catch the laser beam and

mark a second point (point 2) on the wall.

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.

8.4.1.2 Checking the vertical axis  

1. Place the tool in the vertical position on a flat floor

approx. 20 m from a wall.

2. Adjust the position of the tool so that the grips are

parallel to the wall.

3. Switch the tool on and mark the reference point (R)

on the floor.

4. With the aid of the receiver, mark point (A) at the

base of the wall (set the rotating laser to medium

speed).

5. With the aid of the receiver, mark point (B) at a

height of approx. 10 m.

6. Pivot the tool through 180° and realign it with the

reference point (R) on the floor and with point (A) at

thebaseofthewall.

7. With the aid of the receiver, mark point (C) at a

height of approx. 10 m.

NOTE When the procedure has been carried out

carefully, the horizontal distance between the two

points (B) and (C) marked at a height of 10 meters

should be less than 1.5 mm (at 10 m). If the deviation

is greater: Please return the tool to a Hilti Service

Center for calibration.

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9 Troubleshooting

Fault Possible cause Remedy

The display shows this symbol The button lock is active. Deactivate the button lock.

The display shows this symbol The PRA 35 has not been paired with

the PR 35.

Pair the tools (see section 6.9)

The display shows this symbol Invalid entry; the command is not

possible.

Press a valid button.

The display shows this symbol The command is valid but the tool

doesn’t react.

Switch on all tools and make sure

they are within wireless communic-

ation range.

Check to ensure that there are no

obstacles between the tools and that

the maximum wireless communica-

tion range is not exceeded. For good

wireless communication, the PR 35

should be placed ≧ 10 cm (4 in) above

floor level.

The display shows this symbol The tool is in sleep mode (the tool

will remain in sleep mode for max.

4hours).

Activate the tool by pressing the

“Sleep” button. Activate the tool

settings after activating the tool.

The display shows this symbol Fault. Contact Hilti Service.

10 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.

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