PM 50MG‑22

About these operating instructions

• Warning! Read and understand all accompanying documentation, including but not limited to instructions, safety warnings, illustrations, and specifications provided with this product. Familiarize yourself with all the instructions, safety warnings, illustrations, specifications, components, and functions of the product before use. Failure to do so may result in electric shock, fire, and/or serious injury. Save all warnings and instructions for future reference.
  
• 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 accompanying documentation corresponds to the current state of the art at the time of printing. Please always check for the latest version on the product’s page on Hilti’s website. To do this, follow the link or scan the QR code in this documentation, marked with the symbol .
  
• Ensure that these operating instructions are with the product when it is given to other persons.
  

Explanation of symbols

Warnings

Symbols in the 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 Li‑ion battery
	Hilti charger

Symbols in illustrations

	These numbers refer to the illustrations at the beginning of these operating instructions.
	The numbers in illustrations refer to important work steps or to components important for the work steps. In the text, the corresponding numbers draw attention to these work steps or components, e.g. (3) .
	Item reference numbers are used in the overview illustration and refer to the numbers used in the key in the product overview section.
	This symbol is intended to draw your special attention to certain points for handling the product.

Product-dependent symbols

Symbols on the product

	The power tool supports near-field communication (NFC) technology, which is compatible with iOS and Android platforms.
	Direct current (DC)
	Hilti Li-ion battery type series used. Observe the information given in the section headed Intended use
	Pendulum locked (laser beam inclined)
	Pendulum unlocked (self-leveling system active)

Sticker on the product

LASER RADIATION! DO NOT LOOK INTO THE LASER BEAM! LASER CLASS 2 PRODUCT. Laser class 2 based on standard IEC60825-1 / EN60825-1:2014 and compliant with CFR 21 § 1040 (Laser Notice 56).

Product information

• 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

  Multi-line laser	PM 50MG-22
  Generation	01
  Serial no.

Declaration of conformity

General safety instructions, measuring tools

• Keep your workplace clean and well lit. Cluttered or poorly lit workplaces invite accidents.
  
• Do not operate the product in explosive atmospheres, such as in the presence of flammable liquids, gases or dust.
  
• Keep children and other persons clear when the product is in use.
  
• Use the product only within its specified limits.
  
• Comply with your national accident prevention regulations.
  

• Do not expose the product to rain or moisture. Penetrating moisture can cause short circuits, electrical shock, burns or explosions.
  
• Although the product is protected against the entry of moisture, it should be wiped dry before being put away in its transport container.
  

• Stay alert, watch what you are doing and use common sense when operating a measuring tool. Do not use a measuring tool while you are tired or under the influence of drugs, alcohol or medication. A moment of inattention while operating the measuring tool can result in serious personal injury.
  
• Avoid unusual body positions. Keep proper footing and balance at all times.
  
• Wear personal protective equipment. Wearing personal protective equipment reduces the risk of injury.
  
• Do not render safety devices ineffective and do not remove information and warning notices.
  
• Avoid accidental starting. Make sure that the measuring tool is switched off before connecting it to the battery and before picking it up or carrying it.
  
• Use the product and accessories in accordance with these instructions and in the way specified for this special type of tool. Take the working conditions and the work to be performed into account. Use of products for applications different from those intended could result in hazardous situations.
  
• Do not lull yourself into a false sense of security and do not flout the safety rules for measuring tools, even if you are familiar with the measuring tool after using it many times. Carelessness can result in serious injury within a fraction of a second.
  
• Do not use the measuring tool in the vicinity of medical devices.
  

• Use the product and accessories only when they are in perfect working order.
  
• Store measuring tools out of reach of children when not in use. Do not allow persons who are not familiar with the product or these instructions to operate it. Measuring tools are dangerous in the hands of inexperienced persons.
  
• Measuring tools need care and attention. Check that moving parts operate satisfactorily and do not jam, and make sure that no parts are broken or damaged in such a way that the measuring tool might no longer function correctly. Have damaged parts repaired before using the measuring tool. Many accidents are caused by poorly maintained measuring tools.
  
• Do not under any circumstances modify or tamper with the product. Changes or modifications not expressly approved by Hilti may restrict the user’s authorization to operate the product.
  
• Check the accuracy of the measuring tool before using it for important measurements, and if it has been dropped or subjected to other mechanical stresses.
  
• Due to the measuring principle employed, the results of measurements can be negatively affected by certain ambient conditions. These include, for example, the proximity of devices that produce strong magnetic or electro-magnetic fields, vibrations and temperature changes.
  
• Rapidly changing measuring conditions can falsify the results.
  
• When the product is brought into a warm environment from very cold conditions, or vice-versa, allow it to become acclimatized before use. Big differences in temperature can lead to incorrect operation and incorrect results.
  
• When adapters or accessories are used, make sure they are mounted securely.
  
• The measuring tool is designed for the tough conditions of jobsite use, but as with other optical and electrical products (e.g. binoculars, spectacles, cameras) it must be handled with care.
  
• The specified operating and storage temperatures must be observed.
  

Additional safety instructions for laser measuring tools

• Laser radiation in excess of Class 2 can be emitted if the product is opened without correct procedure being followed. Have the product repaired only by Hilti Service.
  
• Secure the area in which you will be taking measurements. While setting up the product, make sure that you do not direct the laser beam toward yourself or others. Laser beams should be projected well above or well below eye height.
  
• Keep the laser exit window clean in order to avoid measurement errors.
  
• Check the accuracy of the product before use and several times during use.
  
• Readings taken in the vicinity of reflective objects or surfaces, through panes of glass or similar materials can falsify the result of measurement.
  
• Mount the product on a suitable holder or bracket or on a tripod, or set it on a smooth, level surface.
  
• Do not work with surveyor's staffs in the vicinity of high-voltage electricity cables.
  
• Make sure that no other laser measuring tool that can influence your measurements is in use in the vicinity.
  
• Do not permit the laser beam to project beyond the controlled area.
  

Additional safety instructions

• Risk of injury by falling tools and/or accessories. Before starting work, check that the battery and installed accessories are secure.
  
• To achieve maximum accuracy, project the line onto a vertical, flat surface. To do so, set up the product at 90° to the surface.
  

Electromagnetic compatibility

Laser classification for Class 2 laser products

Careful handling and use of batteries

• Comply with the following safety instructions for the safe handling and use of Li-ion batteries. Failure to comply can lead to skin irritation, severe corrosive injury, chemical burns, fire and/or explosion.
  
• Use only batteries that are in perfect working order.
  
• Treat batteries with care in order to avoid damage and prevent leakage of fluids that are extremely harmful to health!
  
• Do not under any circumstances modify or tamper with batteries!
  
• Do not disassemble, crush or incinerate batteries and do not subject them to temperatures over 80 °C (176 °F).
  
• Never use or charge a battery that has suffered an impact or been damaged in any other way. Check your batteries regularly for signs of damage.
  
• Never use recycled or repaired batteries.
  
• Never use the battery or a battery-operated power tool as a striking tool.
  
• Never expose batteries to the direct rays of the sun, elevated temperature, sparking, or open flame. This can lead to explosions.
  
• Do not touch the battery poles with your fingers, tools, jewelry, or other electrically conductive objects. This can damage the battery and also cause material damage and personal injury.
  
• Keep batteries away from rain, moisture and liquids. Penetrating moisture can cause short circuits, electric shock, burns, fire and explosions.
  
• Use only chargers and power tools approved for the specific battery type. Read and follow the relevant operating instructions.
  
• Do not use or store the battery in explosive environments.
  
• If the battery is too hot to touch, it may be defective. Put the battery in a place where it is clearly visible and where there is no risk of fire, at an adequate distance from flammable materials. Allow the battery to cool down. If it is still too hot to touch after an hour, the battery is faulty. Consult Hilti Service or read the document entitled "Instructions on safety and use for Hilti Li-ion batteries".
  
  Observe the special guidelines applicable to the transport, storage and use of lithium-ion batteries.
  Read the instructions on safety and use of Hilti Li-ion batteries that you can access by scanning the QR code at the end of these operating instructions.
  

Product overview

1. Battery
   
2. Battery status indicator
   
3. Battery release button
   
4. Warning sticker
   
5. Laser exit window
   
6. Receiver mode button
   
7. Line mode button
   
8. Selector switch for ON / OFF and lock / unlock pendulum
   
9. Knob for fine adjustment
   

Intended use

This tool is a self-leveling multi-line laser level that allows a single person to transfer right angles, level horizontally, carry out alignment work and plumb accurately.

• Marking the position of partition walls (at right angles and in the vertical plane).

• Checking and transferring right angles.

• Aligning components to be installed or sections of a structure in three axes.

• Transferring points marked on the floor to the ceiling.

• For this product, use only the Hilti Nuron Li‑ion batteries of the B 22 series stated in this table.

• For these batteries, use only Hilti chargers of the type series stated in this table.

Features

Items supplied

Information displayed during operation

Status indicators of the Li‑ion battery

Indicators for state of charge and fault messages

Indicators showing the battery's state of health

Product information

Battery

Charging the battery

1. Before charging the battery, read the operating instructions for the charger.
   
2. Make sure that the contacts on the battery and the contacts on the charger are clean and dry.
   
3. Use an approved charger to charge the battery.
   

Inserting the battery

1. Charge the battery fully before using it for the first time.
   
2. Push the battery into the product until it engages with an audible click.
   
3. Check that the battery is seated securely.
   

Removing the battery

1. Press the battery release button.
   
2. Remove the battery from the product.
   

Fall arrest

• Secure the retaining strap to the installation openings for accessories. Check that it holds securely.
  
• Secure one carabiner of the tool tether to the retaining strap and secure the second carabiner to a load-bearing structure. Check that both carabiners hold securely.
  
  Comply with the operating instructions of the Hilti retaining strap and those of the Hilti tool tether.
  

Switching the laser beams on

1. Set the selector switch to the position (ON / unlocked).
   
   • The vertical laser lines are switched on.
     
2. Press the line mode button repeatedly until the desired line mode is set.
   
   • The operating modes change in the following sequence and the sequence repeats itself: vertical lines, vertical side line, horizontal line, vertical and horizontal lines.
     

Matching two points over distance by fine adjustment

1. Position the device with the lower plumbing beam centered on the reference cross on the ground.
   
2. Turn the knob for fine adjustment until the vertical laser beam is aligned with the second, remote control point.
   

Setting the laser beam for the "Inclined line" function

1. Set the selector switch to the position (ON / locked).
   
2. Press the line mode button repeatedly until the desired line mode is set.
   
   When the "Inclined line" function is active, the pendulum is locked and the laser is not leveled.
   The laser beam(s) blink every 5 seconds.
   

Activating or deactivating laser receiver mode

1. To activate the receiver mode, press the receiver mode button. The laser beam flashes five times as confirmation.
   
2. Press the receiver mode button again to deactivate the receiver mode.
   
   Receiver mode is deactivated when the tool is switched off.
   

Switching the laser beams off

1. Set the selector switch to the OFF position.
   
   • The laser beam is switched off and the pendulum is locked.
     
2. The laser beam is switched off automatically when the battery is low.
   

Examples of applications

Transferring heights

Setting up drywall track for a partition wall

Vertical alignment of pipes

Aligning heating units

Aligning door and window frames

Checking

Checking the plumb point

1. In a high room (for example in a stairwell with a height of 10 m), make a mark (a cross) on the floor.
   
2. Place the tool on an even, level surface.
   
3. Switch the tool on and unlock the pendulum.
   
4. Position the tool so that the lower plumb beam coincides with the center of the cross marked on the floor.
   
5. Mark the top point of intersection of the laser lines on the ceiling.
   
6. Pivot the tool through 90°.
   
   The lower red plumb beam must remain on the center of the cross.
   
7. Mark the top point of intersection of the laser lines on the ceiling.
   
8. Repeat the procedure after pivoting the tool through 180° and 270°.
   
   Form a circle on the ceiling from the 4 marked points. Measure the diameter of the circle D in millimeters or inches and the height of the room in meters or feet.
   

9. Calculate the value R.
   
   • The value R should be less than 3 mm (corresponds to 3 mm at 10 m).
     
   • The value R should be less than 1/8".
     

Checking the leveling of the laser beam

1. The distance between the walls must be at least 10 m.
   
2. Place the tool on an even, level surface approx. 20 cm from the wall (A) with the point of intersection of the laser lines directed toward the wall (A).
   
3. Mark the point of intersection of the laser lines with a cross (1) on wall (A) and with a cross (2) on wall (B).
   
4. Place the tool on an even, level surface approx. 20 cm from wall (B) and carefully aim the point of intersection of the laser lines at cross (1) on wall (A).
   
5. Use the adjustable feet to adjust the height of the point of intersection of the laser lines so that the point of intersection coincides exactly with the mark (2) on the wall (B). In doing so, make sure that the bubble level remains centered.
   
6. Mark the point of intersection of the laser lines again with a cross (3) on the wall (A).
   
7. Measure the offset D between the crosses (1) and (3) on the wall (A) (RL = room length).
   

8. Calculate the value R.
   
   • The value R should be less than 3 mm.
     
   • The value R should be less than 1/8".
     

Checking perpendicularity (horizontal)

1. Position the tool so that the lower plumb beam coincides with the center of a reference cross marked in the middle of a room at a distance of about 5 m from the walls.
   
2. Mark all 4 points of intersection on the four walls.
   
3. Rotate the tool through 90° and make sure that the center of the point of intersection coincides with the first reference point (A).
   
4. Mark each new point of intersection and measure each offset (R1, R2, R3, R4 [mm]).
   

5. Calculate the offset R (RL = room length).
   
   • The value R should be less than 3 mm or 1/8".
     

Checking the accuracy of the vertical line

1. Position the tool at a height of 2 m (pos.1).
   
2. Switch the tool on.
   
3. Position the first target plate T1 (vertical) at a distance of 2.5 meters from the tool at the same height (2 meters), so that the vertical laser beam strikes the plate. Mark this position.
   
4. Then place the second target plate T2 at a position 2 meters below the first target plate, so that the vertical laser beam strikes the plate. Mark this position.
   
5. Mark position 2 at the opposite side of the test setup (mirror image) on the laser line on the floor at a distance of 5 meters from the tool.
   
6. Now place the tool on the previously marked position (pos. 2) on the floor.
   
7. Align the laser beam so that it strikes the target plate T1 and the position marked on it.
   
8. Mark the new position on target plate T2.
   
9. Read the distance D between the two marks on target plate T2.
   
   If the difference D is greater than 3 mm, the tool must be returned to a Hilti repair center for adjustment.
   

Hilti Measuring Systems Service

• Choose a test/inspection interval that matches usage of the device.
  
• Have the product checked by Hilti Measuring Systems Service after exceptionally heavy use or subjection to unusual conditions or stress, before important work or at least once a year.