PS 85

About this documentation

• Read this documentation before initial operation or use. This is a prerequisite for safe, trouble-free handling and use of the product.
  
• Observe the safety instructions and warnings in this documentation and on the product.
  
• Always keep the operating instructions with the product and make sure that the operating instructions are with the product when it is given to other persons.
  

Explanation of symbols

Warnings

Warnings alert persons to hazards that occur when handling or using the product. The following signal words are used:

Symbols in the operating instructions

The following symbols are used in these operating instructions:

	Comply with the operating instructions
	Instructions for use and other useful information
	Dealing with recyclable materials
	Do not dispose of electric equipment and batteries as household waste
	Hilti Li‑ion battery
	Hilti charger

Symbols in illustrations

The following symbols are used in illustrations:

	These numbers refer to the illustrations at the beginning of these operating instructions.
	The numbering reflects the sequence of operations shown in the illustrations and may deviate from the steps described in the text.
	Item reference numbers are used in the overview illustration and refer to the numbers used in the key in the product overview section.
	These characters are intended to specifically draw your attention to certain points when handling the product.

Product-dependent symbols

Symbols on the product

The following symbols can be used on the product:

	SD card
	USB
	The tool supports near-field communication (NFC) technology compatible with iOS and Android platforms.
	Hilti Li-ion battery type series used. Observe the information given in the section headed Intended use .
	Li-ion battery
	If applied on the product, the product has been certified by this certification body for the US and Canadian markets according to the applicable standards.

Product information

products are designed for professional users and only trained, authorized personnel are permitted to operate, service and maintain the products. This personnel must be specifically informed about the possible hazards. The product and its ancillary equipment can present hazards if used incorrectly by untrained personnel or if used not in accordance with the intended use.
The type designation and serial number are printed on the rating plate.

• Write down the serial number in the table below. You will be required to state the product details when contacting Hilti Service or your local Hilti organization to inquire about the product.
  Product information

  Wall scanner	PS 85
  Generation	01
  Serial no.

Declaration of conformity

The manufacturer declares, on his sole responsibility, that the product described here complies with the applicable legislation and standards.
The technical documentation is filed here:
Hilti Entwicklungsgesellschaft mbH | Tool Certification | Hiltistrasse 6 | D-86916 Kaufering, Germany

General safety instructions, measuring tools

WARNING! Read all safety precautions and other instructions. Measuring tools can present hazards if handled incorrectly. Failure to observe the safety instructions and other instructions can result in damage to the measuring tool and/or serious injury.
Keep all safety precautions and instructions for future reference.
Work area safety

• 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.
  

Electrical safety

• Do not expose the product to rain or moisture. Penetrating moisture can cause short circuits, electrical shock, burns or explosions.
  
• Wipe the product dry before stowing it in the transport container.
  

Personal safety

• 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.
  

Using and handling the measuring tool

• 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

Personal safety

• Keep the measuring tool well away from all implants.
  
• Comply with the national accident prevention regulations.
  
• Do not use the measuring tool to examine humans or animals.
  
• Operation of the device in the proximity of expectant mothers or persons with a cardiac pacemaker is not permissible.
  

Electrical safety

• Remove the battery prior to storage.
  

Using and handling the measuring tool

• Prior to use, always check the measuring tool's presettings and the settings you have made yourself.
  
• After switching on and while using the product, always pay attention to the information and warnings that appear on the display.
  
• Keep the underside of the scanner and the wheels clean as these parts can have an influence on measuring accuracy.
  
• Do not affix stickers or adhesive labels to the sensor area at the back of the measuring tool. Metal plates / labels, in particular, will affect measuring results.
  
• While measuring is in progress, always keep all 4 wheels in contact with the surface being scanned. Do not pass over steps or edges.
  
• While scanning is in progress, to avoid influencing the scan hold the measuring tool only by the grip provided for the purpose.
  
• While scanning is in progress, do not wear gloves and ensure an adequate earth/ground connection. An inadequate earth/ground connection can impair material detection (including detection of electrically live lines).
  
• Always move the measuring tool back and forth with a perfectly steady action.
  
• Do not work off a ladder.
  
• Do not drill at positions where the measuring tool has detected the presence of an object. Take the diameter of the drill bit into account and always allow an adequate safety factor.
  
• Do not use the measuring tool to detect critical objects such as load-bearing structural elements, high-tension lines, gas or steam lines, high-pressure lines and similar objects.
  
• Never rely on the measuring tool alone. Verify the results of measurements by cross-checking with other sources of information and by taking control measurements and, if necessary, by drilling pilot holes.
  
• Make sure that the wrist strap is securely attached. Prior to each use, always check the attachment point of the wrist strap for possible damage.
  
• Risk of injury by falling tools and/or accessories. Use only the wrist strap supplied.
  
• Carry the measuring tool only by the grip provided for the purpose. Keep the grip clean, dry and free from oil and grease.
  
• Keep the display clean and easily readable. Wipe the display only with a clean, non-scratch cloth.
  
• Due to the measuring principle employed, the results of measurements can be negatively affected by certain ambient conditions. These include, e.g. proximity to devices that generate powerful magnetic or electromagnetic fields, dampness, construction materials containing metal, aluminum foil-backed insulation, multiple layers, materials with cavities or electrically conductive wall coverings or tiles. Accordingly, other sources of information (e.g. plans of the building) should also be consulted before beginning drilling, sawing or grinding in the area scanned.
  
• When scanning is in progress, avoid the vicinity of devices (such as cellphones, for example) that emit strong electric, magnetic or electro-magnetic fields. On all devices capable of producing emissions that can impair measurement, deactivate the relevant functions if possible, or switch the devices off.
  
• Do not operate the measuring tool in the vicinity of military installations, airports, radio astronomy facilities or in aircraft unless prior permission has been obtained.
  
• Check the accuracy of the measuring tool if it has been dropped or subjected to other mechanical stresses. If the measuring tool is damaged, have it repaired by a Hilti service center.
  
• The specified operating and storage temperatures must be observed.
  

Battery use and care

• 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.
  

Additional safety instructions for batteries.

• Never swallow button-cell batteries. Severe internal caustic burns or death can result within 2 hours of swallowing a button-cell battery.
  
• Make sure that the button-cell battery is inaccessible to children. Consult a physician immediately if there is any suspicion that the button-cell battery has been swallowed or inserted into a body orifice.
  
• When replacing batteries, make sure that the correct procedure is followed. There is a risk of explosion.
  
• Do not attempt to recharge a button-cell battery and do not short-circuit the button-cell battery. The button-cell battery could develop a leak, explode, catch fire and injure persons.
  
• Remove and dispose of discharged button-cell batteries correctly. Discharged button-cell batteries can develop leaks and so damage the product or injure persons.
  
• Do not damage the button-cell battery and do not attempt to take the button-cell battery apart. The button-cell battery can develop a leak, explode, catch fire and injure persons.
  
• Do not bring a damaged button-cell battery into contact with water. In the presence of water, escaping lithium can produce hydrogen and so lead to a fire or an explosion, or cause injury to persons.
  

Product overview

1. Wheel
   
2. Top marking notch
   
3. Display
   
4. Left/right marking notches
   
5. Control panel
   
6. Grip
   
7. Screw, button-cell battery holder
   
8. Button-cell battery holder
   
9. Battery release button
   
10. Battery
    
11. Battery state of charge indicator
    
12. Slot, micro-SD card
    
13. USB port, type C
    
14. Sensor area
    
15. Eye
    
16. Left function button
    
17. Arrow buttons
    
18. Start/stop button
    
19. Right function button
    
20. Screenshot button
    
21. On/off button
    

Intended use

The product described is a wall scanner. It is designed to detect objects such as ferrous metals (reinforcing bars), non-ferrous metals (copper, aluminum), wooden beams, plastic pipes, lines and electric cables in dry materials.

• For this product, use only Hilti lithium‑ion batteries of the B 12 series. For this product, Hilti recommends the use of the batteries stated in this table.

• For these batteries, use only Hilti chargers of the type series stated here.

Items supplied

Wall scanner, USB cable, operating instructions
Other system products approved for use with this product can be found at your local Hilti Store or at: www.hilti.group

Overview of measuring modes

The measuring tool supports the following measuring modes:

• Object detection for detecting objects in walls, floors and ceilings.
  
• Leak detection for detecting leaks.
  
• Distance measurement for measuring distances.
  

You can change from mode to mode by selecting the "Measuring mode" item from the menu.

Battery

Battery operating voltage	10.8 V
Ambient temperature for operation	−17 ℃ …60 ℃ (1 ℉ …140 ℉)
Storage temperature	−20 ℃ …40 ℃ (−4 ℉ …104 ℉)
Battery charging starting temperature	−10 ℃ …45 ℃ (14 ℉ …113 ℉)

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.
   

Attaching wrist strap

1. Pull the narrow loop of the wrist strap through the eyelet in the underside of the product.
   
2. Pass the broad loop through the narrow loop and pull the wrist strap tight.
   

Switching measuring tool on/off

1. To switch the measuring tool on, press the on/off button or the start/stop button.
   
   • Outside the operating temperature range, a fault message is displayed and the measuring tool automatically switches off. Allow the measuring tool to cool down or warm up, as appropriate, and then switch it on again.
     
   The tool automatically switches itself off completely if it is not used for 5 minutes. You can change this preset delay before automatic deactivation in the main menu.
   
2. To switch the measuring tool off, press the on/off button.
   

Menu

Navigating in menu

The functions assigned to the left and right function buttons vary, depending on which display view is active. The assigned function is indicated by a symbol appearing on the display directly above the corresponding function button.

1. To open the menu, press the left function button.
   
2. To scroll through a menu, press the up or down arrow button.
   
3. To confirm your choice of a menu option, press the start/stop button.
   
4. To move back up to the next higher menu level, press the left function button.
   
5. To exit the menu, press the right function button (not available in the "Gallery" submenu).
   

Menu items

Gallery You can retrieve images saved in the tool's internal memory, or you can delete them by pressing the right function button below the wastebasket symbol.
Measuring mode Set the measuring mode you want to use. The measuring tool switches directly to the desired mode as soon as you make your selection. In "Object detection" mode you can also select the most suitable wall type for the planned measurement as well as the view, which determines how the results of measurement are displayed on screen.
Tool settings

• Measuring tape: Switch the measuring tape on and off for the measuring modes "Object detection" (except Spot view) and "Leak detection". You can use the measuring tape to measure the center-to-center distance between two objects, for example. Press the right function button to zero the measuring tape.
  
• Screen brightness : Set the brightness of the display lighting.
  
• Audio : Switch the acoustic signal on or off. When the function is switched on, an acoustic signal sounds every time a button is pressed and for each object detected underneath the sensor area.
  
• Start settings : Choose the settings (e.g. wall type, view, measuring tape) that are activated by default when the measuring tool is switched on. You have the choice of using the settings active when the tool was last switched off, or a personalized basic setting (corresponds to the current settings selected in the main menu).
  
• Switch off after ... : Select the time after which the measuring tool will switch off automatically if it is not used.
  
• Language : Select the display language.
  
• Date & time : Set the date and time for saving images and select the date and time formats. When date and time are no longer saved the button-cell battery has to be changed (see the section headed "Inserting/changing button-cell battery" (see Figure D), Page 31).
  
• Unit of measure : Select the unit of measure to be used in displaying measurements. (Not available in all markets.)
  
• Default settings : You can reset all menu options to their ex-works default settings. At the same time, all images saved in the tool's internal memory are irretrievably deleted.
  

Information about the tool This function enables you to call up tool information such as the software version installed, for example.

Context-sensitive information and help

Whenever the question-mark symbol appears on the display above the right function button, pressing the right function button will call up context-sensitive information and help. This option is available whenever you change the wall type or the view, in all measuring modes of object detection and in leak detection.

Saving / transferring results of measurement

Saving results of measurement as image

A panorama screenshot function is available in Object view. You can use it to save the results of measurement (including the object depth for each object shown on the display) as an image for documentation and subsequent analysis.

1. Measure the desired area in the usual way.
   
2. Then press the "Screenshot" button.
   
   • If there a micro-SD card installed in the slot, the images are saved to the card. Otherwise, the images are saved to the measuring tool's internal memory and can be exported via the USB interface.
     
   • You can use the "Gallery" menu item to retrieve or delete images.
     

Data transfer via USB interface

The USB interface is for data transfer only. Batteries or other devices cannot be recharged via this port.

1. Open the cover over the USB port.
   
2. With the measuring tool switched off, use the USB cable to establish the connection between the USB port on the tool and your PC.
   
   Use the USB interface only for connecting the measuring tool to a PC. Attempts to connect to other devices can damage the measuring tool.
   
3. Switch the measuring tool on.
   
4. Open the file browser on your PC and select "Hilti PS 85 " as the drive. The files saved in the measuring tool's internal memory can be copied, moved to your PC, or deleted.
   
5. As soon as you have completed the desired procedure, disconnect the drive in the standard way.
   
   Invariably, you first have to log out the drive from your PC's operating system (Eject drive), as otherwise the measuring tool's internal memory can be damaged.
   
6. Then switch the measuring tool off at the on/off switch.
   
7. Disconnect the USB cable and close the cover over the USB port to protect against dirt and spray.
   

Data transfer by micro-SD card

If there is a micro-SD card inserted in the measuring tool, images are automatically saved to the card and not to the measuring tool's internal memory.

1. Open the cover over the slot for the micro-SD card.
   
2. Press the micro-SD card slightly into the measuring tool until the card unlatches.
   
3. Remove the micro-SD card from the slot and connect it to your PC. The files saved on the card can be copied, moved to your PC, or deleted.
   
4. When you are finished, re-insert the micro-SD card into the slot. Make sure you insert the card right way round. Push the micro-SD card in until it engages.
   
5. Close the cover of the slot to protect against dust and spray.
   

Software update

You can update the software of the measuring tool when necessary.
The newest software version can be downloaded from here: Downloading

• If the software version is newer than the version installed on your product, download the update file.
  
• Load the update file on to the micro-SD card.
  
• Insert the micro-SD card into the measuring tool.
  
• Switch the measuring tool on.
  
• If a new update file that was not installed beforehand is found, the update process starts automatically.
  
• You can follow the progress of the update process on the display. This process can take several minutes to complete.
  
• When the update procedure completes, the measuring tool reboots automatically.
  
• Hilti recommends subsequently deleting the update file from the micro-SD card.
  
  Switch the measuring tool off before you remove the micro-SD card.
  

Working principle

The measuring tool is used to examine the base material in the sensor area. If there are objects set one above the other in the wall, the object closest to the surface is shown on the display.
In "Object detection" mode you can also select the most suitable wall type for the planned measurement as well as the view, which determines how the results of measurement are displayed on screen.

Detectable objects

Objects that differ from the wall material are detected.

• Plastic pipes (e.g. water-filled plastic pipes at least 10 mm in diameter, empty pipes at least 20 mm in diameter in solid surrounding material)
  
• Electric cables (irrespective of whether the cables are live or not)
  
• Three-phase power cables (e.g. for kitchen cooker)
  
• Low-voltage lines (e.g. for doorbell, telephone, LAN, smart-home wiring)
  
• Metal pipes, bars, beams of all kinds (e.g. steel, copper, aluminum)
  
• Reinforcing bars
  
• Wooden beams
  
• Cavities
  

Special measurement cases

Due to the principle employed, certain adverse circumstances can have a negative effect on the result:
• Multi-layer wall make-ups.
  
• Empty plastic pipes and wooden beams in cavities and drywall partitions.
  
• Objects running at an angle in the wall.
  
• Metal surfaces and damp areas; under certain circumstances (e.g. high water content), might be presented on the display as objects in a wall. Bear in mind that concrete has to cure for several months to reach its fully dry state.
  
• Cavities in a wall; might be presented on the display as objects.
  
• Proximity to devices that produce strong magnetic or electro-magnetic fields, such as cellphone base stations or electricity generators.
  

Wall types

Changing wall typeTo obtain the best possible results, always set the appropriate wall type. Measuring depth depends on wall type; the maximum is 85 mm (3.3 in).

• Press the left or right arrow button until the wall type you want to use appears on the display.
  
• Press the start/stop button to confirm your selection of wall type.
  

Wall type "Brick/universal"Wall type "Brick/universal" is suitable for most applications in solid masonry or other homogeneous materials. Plastic and metal objects and electrical lines and other lines are shown on the display. Voids in masonry and empty plastic pipes less than 2 cm (0.8 in) in diameter might not show up on the display. This mode works best with homogeneous base materials such as sandstone bricks and clay plates.
Wall type "Concrete"Wall type "Concrete" is suitable for applications in dry concrete. Plastic and metal objects and electrical lines and other lines are shown on the display. Empty plastic pipes less than 2 cm (0.8 in) in diameter might not show up on the display. When you select the wall type you can also set the maximum measuring depth in the range from 8 cm (3.1 in) to 20 cm (7.9 in).
Wall type "Drywall"Wall type “Drywall” is suitable for detecting wooden beams, metal framing and electrical lines and other lines in drywall partitions (wood, gypsum board, etc.). Filled plastic pipes and wooden beams appear identical on the display. Empty plastic pipes are not detected. If you identify many objects close to the surface (0‑2 mm (0‑0.08 in) below the surface), try working with a surface overlay (e.g. a sheet of perspex 1 cm (0.4 in) thick).
Wall type "Vertical coring brick"Wall type "Vertical coring brick" is eminently suitable for applications in vertical coring bricks. Vertical coring bricks are bricks with many small cavities, generally running vertically. Metal objects and electrical lines and other lines and water-filled plastic pipes are shown on the display. Cavities or empty plastic pipes might not show up on the display.
Wall type "Horizontal coring brick"Wall type "Horizontal coring brick" is eminently suitable for applications in horizontal coring bricks. Horizontal coring bricks are bricks with a small number of large cavities, generally running horizontally. Shallow-covered metal objects, electrical lines and other lines and water-filled plastic pipes at a maximum measuring depth of 2 cm are shown on the display. Cavities or empty plastic pipes might not show up on the display. To improve the result, additionally scan horizontal coring brick with the "Vertical coring brick" wall type. Be prepared to distinguish between plausible and implausible objects (ghost objects).
Wall type "Early-age concrete"Wall type "Early-age concrete" is eminently suitable for applications in concrete that has not yet cured to the fully hardened and dry state. Metal objects, plastic and metal pipes and electric lines are shown on the display. It is not possible to differentiate between electrically live and non-live lines. The maximum detection depth is 6 cm (2.4 in). Bear in mind that concrete has to cure for several months to reach its fully hardened and dry state.

View

Changing view

• Repeatedly press the up or down arrow button until the view you want to use is shown.
  
• Press the start/stop button to confirm your selection of the view.
  

Spot view

Spot view shows an initial result even without the measuring tool being moved over the surface. Consequently, it is particularly suitable for measurements in corners or at choke points. The maximum measuring depth is 6 cm. Objects detected are shown with material property, if appropriate, but without depth information.
Whenever possible, even in Spot view you should move the measuring tool over the surface in order to obtain the best possible results. If the measuring tool is not moved its ability to pinpoint objects is restricted, particularly with regard to plastic pipes and wooden beams.
Measurement displayIf no object is found, only the outside circle appears on the display and it shows green.
If there is an object in the vicinity, the outside circle shows red. As the measuring tool approaches an object the number of concentric circles shown on the display increases. The number of circles diminishes as the measuring tool moves away from an object.
If the signal is strong enough, orientation arrows appear on the display. To pinpoint the center of the object, move the measuring tool in the direction indicated by the orientation arrows. Over the center of the object the reading peaks and if the signal is strong enough centering crosshairs appear on the display. The color coding for material property is the same as in Object view.
Even if the orientation arrows and the centering crosshairs do not appear, there is still the possibility of an object being present in the immediate vicinity.

Object view

The best possible results of measurement and the maximum measuring depths are available in Object view. Detected objects are shown over the length of the scan complete with depth information and, if applicable, their material property.
Measuring operation

• Place the measuring tool on the surface to be scanned and move it in the required direction. The results of measurement appear on the display after the tool has been moved at least approximately 10 cm.
  
• Always move the measuring tool in a straight line, applying light pressure so that the wheels are in firm contact with the surface of the wall.
  
• To obtain optimum results, move the measuring tool slowly over the entire area to be examined and observe the results obtained as you draw the measuring tool back. The scan should be at least 40 cm in length.
  
• You can start a new measurement at any time by pressing the start/stop button.
  
• If you lift the measuring tool off the wall while a measurement is in progress, the most recent result remains visible on the display. Measurement restarts when contact with the wall is re-established, or when movement of the measuring tool resumes.
  
• For particularly sensitive measurements, use Spot view with the appropriate wall type.
  

On account of the operating principle, the top edges of objects transverse to the measuring tool's direction of movement are reliably detected. Consequently, always scan the area to be examined in crosswise passes.
A single pass in one direction along the track to be examined suffices to locate objects. If you want to pinpoint and precision-mark a detected object, draw the measuring tool back along the same track in the reverse direction.
You can ascertain the path of a detected object in the wall by running a succession of passes with the measuring tool along adjacent tracks.
Measurement displayIf no object was detected in the sensor area, the broken lines and the center line are completely green. A detected object appears between the two broken lines on the display and the two broken lines and the center line are partly or completely red.
The depth scale on the right shows the depth of the detected object's top edge below the surface.
The image of the objects shown on the display can differ from the actual properties of the objects. In particular, very thin objects appear to be thicker than they actually are. Larger-diameter cylindrical objects (e.g. plastic pipes or water pipes) can appear narrower than they actually are.
Color coding of material propertyDepending on the nature and the depth of the object detected, it is possible to identify material properties.
They are indicated by color-coding, as follows:

Orange	Electrically live object
Blue	magnetic / ferrous metal (e.g. reinforcing bar)
Turquoise	Non-magnetic metal (e.g. copper pipe)
White	Non-metal (e.g. wood, plastic)
Gray	Material property unknown

Marking objectsYou can use the marking notch at the top or the outside edge of the measuring tool to mark detected objects.

• Move the measuring tool to the detected object you want to mark.
  
• Position the measuring tool so that the object is centered relative to the center line on the display.
  
• Apply one mark at each marking notch for top, right and left.
  
• The point of intersection for the marks you applied coincides with the center of the object.
  
• Alternatively, position the measuring tool so that the object is centered relative to either of the two broken lines on the display.
  
• The object is now centered below the corresponding outside edge of the measuring tool.
  
• Draw a line along this outside edge on the surface of the material and on this line mark a cross at the position of the corresponding side marking notch.
  
• This coincides with the center of the object.
  
You can mark the path of a detected object in the wall by running a succession of passes with the measuring tool along adjacent tracks and joining up the corresponding series of marks.

Signal view 2D

Signal view 2D shows signal strength at the corresponding measuring position in combination with the object depth. Signal view 2D is a variant of Object view. It shows signal strengths instead of object symbols. The signal strength maximum represents the top edge of the object.
Signal view 2D can be used to pinpoint close-spaced objects and arrive at a better estimation of complicated material make-ups. Even objects with a weak echo and objects underlying other objects can be detected under certain circumstances. See the notes on the measuring operation in Object view.
See the notes on the measuring operation in Object view .

Signal view

Signal view shows signal strength at the corresponding measuring position, with no information relating to object depth. Signal view can be used to pinpoint close-spaced objects and arrive at a better estimation of complicated material make-ups by studying the signal transient.

Changing button-cell battery

The measuring tool has a button-cell battery to enable it to save the date and time. The button-cell battery has to be changed when it is discharged.

1. Remove the screw of the button-cell battery holder.
   
2. Ease the button-cell battery holder out of its slot (using a suitable tool if necessary).
   
3. Remove the empty button-cell battery and insert a new button-cell battery. Make sure that polarity is correct. The positive pole of the button-cell battery must be facing up.
   
4. Re-insert the button-cell battery holder into its slot. Make sure that the button-cell battery holder is inserted correctly and fully, as otherwise protection against dust and spray is not ensured.
   
5. Re-install the screw of the button-cell battery holder and tighten it until hand-tight.