LEICA DISTO FAQ

LEICA DISTO FAQ 

ALL AbOuT DISTO DXT 

How to change batteries of DISTO DXT? Fold out the end-piece and open the locking mechanism 

with a coin or a screwdriver and lift the battery compartment cover. Insert batteries, observing the 

correct polarity. Close the battery compartment carefully. To ensure the instrument remains watertight, 

any dirt on the battery compartment seals should be avoided. 

How to use the multifunctional end-piece? The device can be used for different measuring situations: 

For measurements from an edge, open the positioning bracket until it locks in place. For measurements 

from a corner open the positioning bracket until it locks in place. With a slight push to the right the 

bracket can be turned further. A built-in sensor automatically detects the orientation of the positioning 

bracket and calculates the corresponding distances accordingly. 

How to switch off/on the beep? The beep can be switched off (and on) with a long press simultaneously 

on minus key and reference key ( ). 

How to switch off/on the display illumination? The illumination can be switched off (and on) with a 

long press simultaneously on plus key and reference key ( ). 

Which formula stands behind the indirect measuring function Pythagoras? In any right triangle, 

the theorem of Pythagoras is valid: a²+b²=c². This means the other way round: c=radical of (a²+b²) or 

b=radical of (c²-a²). One side of the triangle can be calculated, if the other two sides are known. Therefore 

it is important that the DISTO measuring points are at the same level and that measurement 2 is right 

angled. With a long press on the DIST-key the minimum function can be activated to get the shortest 

distance for measurement 2. 

How can I clean the DISTO DXT? The device with keypad and display can be easily cleaned under 

running water. Attention should be taken, that the water-jet is not directed onto the optical lens. If water 

is on the optical lens, it should be removed with a soft cloth. 

How can I get an extra year’s warranty for the Leica DISTO DXT? Our standard warranty of 2 

years can be extended by one additional year if you register your device on our website www.disto.com 

within eight weeks of the purchase date. If the product is not registered a two year warranty applies. 

ALL AbOuT DISTO D3A bT 

Which system requirements does my PDA need to work with DISTO transfer? The DISTO 

transfer works on PDAs with Bluetooth® interface as long it has Windows Mobile 2003 SE respectively 

2005 or Windows Mobile 5.0 and Windows Mobile 6.0 installed. Very good experience we have with 

PDA devices from HP. Of course to install DISTO transfer on a PDA a PC is required. On this PC 

Microsoft ActiveSync needs to be installed in order to download DISTO transfer to the PDA. 

Does DISTO transfer support the use of Apple Mac computers? No it doesn’t. To use your Leica 

DISTO with an Apple Mac you need to buy a software from a third party developer. 

DISTOS FAQ.indd 1 30/06/2011 12:50:28 PM

Does DISTO transfer support the use of Palm pocket PC? No it doesn’t. To use your Leica 

DISTO with a Palm you need to buy a software from a third party developer. 

Does DISTO transfer support the use of mobile phone like blackberry or Smart phone with 

Windows Mobile 6.0? DISTO transfer does not work on mobile phones except of Smart phones 

with Windows Mobile 6.0. Please note that these Smart phones only have a reduced version of Excel 

which limits the comfort for use with the Leica DISTO. Another limiting factor is the T9 predictive text 

technology. 

What is DISTO transfer and how does this work? DISTO transfer is a program which once 

started is running in the background. Data which are send from a Leica DISTO device are collected 

by the transfer software and this simulates a keyboard entry to the active window. So the value will 

be transferred in any application window that is active in the position of the cursor. This very versatile 

procedure that you can use your Leica DISTO with almost every Windows application. You only need 

to select the format you want to receive the data (with units, enter (in Excel the cursor jumps to the cell 

below), tabulator (in Excel® the cursor jumps to the cell to the right)). 

How accurate is the tilt sensor in the Leica DISTO D3a bT? The accuracy of the inclination sensor 

in the device is ± 0.3° to the laser beam respectively ± 0.3° to the housing of the device. 

How can I check if the tilt sensor of my device is still within the described specifications (± 

0.3°)? The tilt sensor has to be switched on. On an absolute flat surface the first measurement has to 

be made. (please note angle a). Afterwards the device has to be turned around 180° and the second 

measurement has to be made. (please note angle b). Now angle a and angle b are added up and divided 

by 2. If this value falls within ± 0.3° the tilt sensor of the device is within the described specification. 

What is the angular range of the tilt sensor in the Leica DISTO D3a bT? The integral tilt sensor 

in the Leica DISTO D3a BT functions in the range +/- 45° and at a transverse tilt of < +/- 10°. The 

display indicates if the tilt is in the range > +/- 50° a line appears on the display with the text max. and an 

info code i 160, which means that the device is being used outside its permissible range. If the device 

is held at > +/- 10° transversely, a similar line appears on the display, which indicates the transverse tilt 

with the text “max”. The info code i 156 indicates that the device is tilted too much. 

What units of tilts are integrated into the Leica DISTO D3a bT? You can set the Leica DISTO 

D3a BT to use different tilt units. The user can select between ° and %. These can be changed in the 

menu. 

Can the inclination sensor of a Leica DISTO D3a bT be calibrated by the user? The user can 

calibrate the device’s tilt sensor. The angle sensor is switched on by pressing the “Function key” once. 

Take two measurements on an absolutely flat surface. The first measurement is taken and a note is made 

of the measured angle a. The device is then turned through exactly 180°, the second measurement is 

taken and a note is made of the measured angle b. The value x to which the device must be corrected 

is calculated as follows: 

x = (a+b) /2 

The calibration mode is then entered by pressing keys “Clear Off” and the “Function key” both at the 

same time for 2 seconds. The correction value x can be entered here using the “Plus” and “Minus” keys. 

The entered value is stored and implemented by pressing the “Menu/=” key. 


Is it possible to obtain detailed information about the measurements taken? Yes, it is possible to 

obtain detailed information within the Leica DISTO D3a BT about the measurements of areas and 

volumes. After the measurements have been taken (area/volume), the “Area/Volume” key must be held 

down and then detailed information is shown in the display. 

What accessories are recommended for the Leica DISTO D3a bT? For long distances we 

recommend using a tripod, even indoors. A tripod provides additional steadiness and therefore allows 

accurate targeting, especially over long distances. We particularly recommend the Leica TRI100 tripod. 

You will need to set within the menu button that the Leica DISTO D3a is now measuring from the 

tripod thread. 

Can the Leica DISTO D3a bT also be used to measure horizontal angles? No, the integral tilt 

sensor can only measure vertical angles. If the device is held at a transverse tilt angle greater than 

+/-10° the display shows an info code 156, which means that the device is required to be held level 

(transversely). 

What is the measuring accuracy when using the direct horizontal measuring function? For 

example, if a distance of 10m is measured at an angle of 10°, the error on the direct horizontal distance 

(fd) is 9mm. If a distance of 10m is measured at an angle of 45°, the error on the direct horizontal 

distance (fd) is 37mm. In order to have best results with indirect measurements considering the deviation 

of the inclination sensor use the Leica DISTO D3a BT as follows. For measuring distances use the 

instrument as flat as possible. 

The horizontal distance error (fd) and the height error (fh) can be calculated as follows: 

fd = horizontal distance error 

fh = error in height 

d = measured distance 

a = angle at which the distance is measured 

fa = possible angular error 

fd = d * cos (a) – d * cos (a + fa) 

fh= d * sin (a) – d * sin (a + fa) 

Which customer segment would find the Leica DISTO D3a BT of most use for everyday tasks? 

The Leica DISTO D3a BT is a great measurement aid for a wide range of target groups and is a superbly 

multi-talented device for indoor tasks. The device is particularly suitable, but of course not exclusively, 

for the following users: architects, interior surveyors, electricians, carpenters, kitchen installers, flooring 

contractors, joiners, heating engineers, window installers, decorators and many others. 

Can the display illumination be switched off from the device? The display illumination can be 

switched off in the menu. 

Can the historical storage memory in the device be erased? The historical storage memory in the 

device can be erased by pressing the “Clear Off” and “Storage” keys (both pressed at the same time 

and held for 2 seconds). 

How can I get an extra year’s warranty for the Leica DISTO D3a bT ? Our standard warranty of 2 



within eight weeks of the purchase date. If the product is not registered, a two year warranty applies. 

Which system requirements does my PC need to work with DISTO transfer? Generally the 

Leica DISTO transfer works on all desktops, laptops, tablet PCs and UMPCs equipped with Microsoft 

Windows SE, ME, XP or Vista. Of course the computer must have a Bluetooth® interface or you have to 

install a Bluetooth® stick. Using an external Bluetooth® stick the computer must fulfill the requirements 

of the Bluetooth® stick. 

ALL AbOuT DISTO D3A 

How accurate is the tilt sensor in the Leica DISTO D3a? The accuracy of the inclination sensor in 

the device is ± 0.3° to the laser beam respectively ± 0.3° to the housing of the device. 

How can I check if the tilt sensor of my device is still within the described specifications (± 

0.3°)? The tilt sensor has to be switched on. On an absolute flat surface the first measurement has to 

be made. (please note angle a). Afterwards the device has to be turned around 180° and the second 

measurement has to be made. (please note angle b). Now angle a and angle b are added up and divided 

by 2. If this value falls within ± 0.3° the tilt sensor of the device is within the described specification. 

What is the angular range of the tilt sensor in the Leica DISTO D3a? The integral tilt sensor in the 

Leica DISTO D3a functions in the range ± 45° and at a transverse tilt of < ± 10°. The display indicates 

if the tilt is in the range > ± 50° a line appears on the display with the text max. and an info code i 160, 

which means that the device is being used outside its permissible range. If the device is held at > ± 10° 

transversely, a similar line appears on the display, which indicates the transverse tilt with the text “max”. 

The info code i 156 indicates that the device is tilted too much. 

What units of tilts are integrated into the Leica DISTO D3a? You can set the Leica DISTO D3a 

to use different tilt units. The user can select between ° and %. These can be changed in the menu. 

Can the inclination sensor of a Leica DISTO D3a be calibrated by the user? The user can calibrate 

the device’s tilt sensor. The angle sensor is switched on by pressing the “Function key” once. Take two 

measurements on an absolutely flat surface. The first measurement is taken and a note is made of the 

measured angle a. The device is then turned through exactly 180°, the second measurement is taken 

and a note is made of the measured angle b. The value x to which the device must be corrected is 

calculated as follows: 

x = - (a+b) /2 


same time for 2 seconds. The correction value x can be entered here using the “Plus” and “Minus” keys. 


Is it possible to obtain detailed information about the measurements taken? Yes, it is possible 

to obtain detailed information within the Leica DISTO D3a about the measurements of areas and 

volumes. After the measurements have been taken (area/volume), the “Area/Volume” key must be held 

down and then detailed information is shown in the display. 

What accessories are recommended for the Leica DISTO D3a? For long distances we recommend 

using a tripod, even indoors. A tripod provides additional steadiness and therefore allows accurate 

targeting, especially over long distances. We particularly recommend the Leica TRI100 tripod. You 


will need to set within the menu button that the Leica DISTO D3a is now measuring from the tripod 

thread. 

Can the Leica DISTO D3a also be used to measure horizontal angles? No, the integral tilt 

sensor can only measure vertical angles. If the device is held at a transverse tilt angle greater than 

+/-10° the display shows an info code 156, which means that the device is required to be held level 



example, if a distance of 10m is measured at an angle of 10°, the error on the direct horizontal distance 

(fd) is 9mm. If a distance of 10m is measured at an angle of 45°, the error on the direct horizontal distance 

(fd) is 37mm. In order to have best results with indirect measurements considering the deviation of the 

inclination sensor use the Leica DISTO D3a as follows. For measuring distances use the instrument 

as flat as possible. The horizontal distance error (fd) and the height error (fh) can be calculated as 

follows: 








. 

Which customer segment would find the Leica DISTO D3a of most use for everyday tasks? 

The Leica DISTO D3a is a great measurement aid for a wide range of target groups and is a superbly 

multi-talented device for indoor tasks. The device is particularly suitable, but of course not exclusively, 

for the following users: architects, interior surveyors, electricians, carpenters, kitchen installers, flooring 

contractors, joiners, heating engineers, window installers, decorators and many others. 

Can the display illumination be switched off from the device? The display illumination can be 

switched off in the menu. 




How can I get an extra year’s warranty for the Leica DISTO D3a? Our standard warranty of 2 

years can be extended by one additional year if you register your device on our website http://www. 

disto.com/ within eight weeks of the purchase date. If the product is not registered, a two year warranty 

applies. 

ALL AbOuT DISTO D8 

How many zoom levels does the Leica DISTO D8 have? The integrated digital Pointfinder in the 

device has 1x, 2x and 4x zoom. You can see on the left up corner which zoom level you have selected. 

To change from one zoom level to the next one you have to press the “Digital Pointfinder” key. 


Can the brightness in the digital Pointfinder be adjusted? Yes, on the screen of the digital Pointfinder 

on top of the crosshair you see a symbol existing of a “Sun” and a “+” and “-“. By pressing the “Plus” 

and “Minus” key you are able to adjust the brightness in 5 steps. 

Why is the laser dot on distance on short distances not centered in the crosshair? It is the 

parallax effect due to the distance between the laser window and the digital Pointfinder optics. This 

effect occurs only when the digital Pointfinder is used on targets below 10m. In this case the laser dot 

appears displaced in reference to the crosshair. This is not an error !! For distances below 10m please 

rely on the real laser dot. 

How accurate is the tilt sensor in the Leica DISTO D8? The accuracy of the tilt sensor in the 

device is ±0.1° to the housing of the device. To the laser beam the maximum deviation can be up 

to -0.1° and +0.2°. This applies at room temperature (20°C - 30°C). At any other temperatures the 

maximum deviation increases by ±0.1°. 

What units of tilts are integrated into the Leica DISTO D8? You can set the Leica DISTO D8 

to use different tilt units. Select in the menu the submenu “Units” and choose between ° , %, in/ft and 

mm/m. 

-> The level function in the right hand top corner of the display can also be switched on/off in the 

submenu “level”. It is always set to 0.0° and can not be changed into a different unit for tilts. 

What is the angular range of the tilt sensor in the Leica DISTO D8? The integrated tilt sensor in 

the Leica DISTO D8 functions at any angle (360°) and at a transverse tilt of < ±10°. If the device is 

held at > ±10° transversely, the info code “i156” appears in the display and indicates that the device is 

tilted too much. 

Can the tilt sensor of a Leica DISTO D8 be calibrated by the user? You can recalibrate the zero 

level of the integrated tilt sensor. In the menu there is a special point for this calibration. If you enter this 

submenu you will be guided through the process. Please now proceed the following: 

Put the device on a nearly horizontal flat surface (e.g.table) 

1. Carry out the first measurement by pressing “ON/DIST” key on a level surface. The device confirms 

the measurement. 

2. Rotate the device horizontally 180°. 

3. Press the “=/Menu” key to confirm that the device was rotated 180°. 

4. Press the “ON/DIST” key and take the second measurement. The device confirms the 

measurement. 

-> The zero level of the tilt sensor is now calibrated 


to obtain detailed information in the Leica DISTO D8 about the measurements of areas, volumes, 

Pythagorean and trapezoid functions, indirect measurements and triangle areas. After the measurements 

have been taken, keep the relevant function key pressed. A small red triangle on the bottom left hand 

of the display is showing that there are 2nd Results available. 


What accessories are recommended for the Leica DISTO D8? 

Leica Tripod TRI100 For long distances we recommend using a tripod, even indoors. A tripod provides 

additional steadiness and therefore allows accurate targeting, especially over long distances. We 

particularly recommend the Leica TRI100 tripod. 

Target Plate For measurement especially outdoors and in very bright conditions it is very helpful to use 

a target plate. We offer different versions in our accessory range. 

Adaptor for attachment to the pole and the tripod (LSA360) For using the Leica DISTO on a set up 

pole as it is used e.g. for GPS applications we recommend the use of this adaptor. The reference point 

for measurements is the back of the Leica DISTO. The lateral offset of the DISTO on the adaptor 

to the center of the pole varies due to the different pole diameters. The LSA360 can also be used on 

the middle column of the Leica TRI100 (tripod head can be removed). Doing indirect measurements 

from there will increase the accuracy because laser axis of the Leica DISTO and tilting axis of the 

Leica TRI100 are both at the same height level at the back of the Leica DISTO. The lateral offset of 

the LSA360 to the center of the pole depends on the diameter of the used pole (11mm pole -> 66.9mm 

offset, 15mm pole -> 69.2mm offset, 20mm pole -> 72mm offset, 25mm pole -> 74.9mm offset, 30mm 

pole -> 77.8mm offset, 35mm pole -> 80.7mm offset). 

Can the Leica DISTO D8 also be used to measure horizontal angles? No, the integrated tilt 

sensor can only measures vertical angles. If the device is held at a transverse tilt angle greater than 

±10° the display shows an info code “i156”, which means that the device is required to be held level 


What is the measuring accuracy when using the indirect measuring functions including tilt 

sensor? For example, if a distance of 10m is measured at an angle of 10°, the error on uncertainty 

on measurement on the direct horizontal distance (fd) is 3mm. If a distance of 10m is measured at an 

angle of 45°, the uncertainty of measurement on the direct horizontal distance (fd) is 12mm. 

-> in order to have best results with the direct horizontal distance measurements, considering the 

deviation of the tilt sensor, use the Leica DISTO D8 as flat as possible. 









Which customer segment would find the Leica DISTO D8 of most use for everyday tasks? The 

Leica DISTO D8 is a great measurement tool for a wide range of target groups and is a superbly 

device especially designed for outdoor tasks and/or use to transfer data into computers. The device is 

particularly suitable, but of course not exclusively, for the following users: Architects, Surveyors, Facility 

Managers, Civil Engineer, Real Estate, General Construction, Scaffolding, Painters, Facade Workers, 

Joiners, Firemen, Gardening Companies, Educational Institutions, Electrical Services, Insurance 

Companies, Telecommunications, Police, etc. 


What is the circle on the keypad above the “bluetooth®” key? The Leica DISTO D8 has a 

sensor to detect the brightness of the display. If the device is used outside in bright sunshine this sensor 

automatically adjusts the brightness for the display to save energy. Additionally an adjustment can be 

made in the menu. In the relevant submenu the brightness of the entire display can be adjusted in 6 

steps. 

Can the historical storage memory of 30 values in the device be erased? Yes, the historical 

storage memory in the device can be erased by pressing the “Clear Off” and “Storage” keys - both 

pressed at the same time and held for 2 seconds. 

Which batteries should I use for the Leica DISTO D8? In general you can use any alkaline battery 

or any rechargeable batteries (2xAA). In the scope of delivery we provide high quality batteries and 

we recommend to use such batteries or any (NiMH) batteries. Please note that it is not allowed to use 

Lithium-Ion rechargeable batteries in your Leica DISTO. 

Can I enter a value that is constantly added / subtracted to my measured value? (Offset) Yes, in 

the “Menu” you can go to the “Offset Icon” and enter a value that will constantly be added / subtracted 

from your measured distance value. If an offset value is entered you will see the adequate symbol - a 

triangle with plus or respectively minus next to the laser symbol. 

-> If you want to set the offset value back to zero, enter the menu point “Offset” and press the “Clear/ 

Off” key. 

Can I adjust / edit the constant to a number that I continuously need for further measurements? 

Yes, the saved constant “C” can be adjusted to any desired number that is required. Go to the constant 

by pressing the “Memory” key once. Now press the “=/Menu” key long. The constant value’s background 

is changing to show deep grey. Now you can adjust the constant with the “Plus” and “Minus” key to any 

desired value. Press the “=/Menu” key short to save the new entered value. The constant “C” is now 

saved. 

What is the Long Range (LR) Mode? For long distances under unfavorable conditions (e.g. long 

distances and very bright sunlight) we recommend to use the special integrated Long Range (LR) Mode 

. To select the mode please enter the menu and select the “LR Mode”. If the “LR Mode” is turned on in 

the menu you will see the letter “LR” right next to the laser symbol. This mode will allow you to make 

measurements that were not possible before because most of the time you would receive the info code 

“i255” (too less signal). When using this special Long Range (LR) Mode the measuring time increases 

(it may take up to 7sec) and above 30m the maximum deviation increases to ±0.15mm/m. 

How do I know if the device is still measuring in the digital Pointfinder mode? When using the 

digital Pointfinder in any function, especially in the Long Range (LR) Mode, you will see a clock icon on 

the top of the display. The clock stays in the display until the measurement is finished. Please do not 

move the device before! 

Can I use the profile measurement only in a horizontal line? No, you can use this function in any 

horizontal position. This allows you to use the Leica DISTO D8 as one person operating digital level. 

The accuracy depends mainly on the used distance and the accuracy of the inclination sensor. For 

usage up to 10m on a 1.5m tripod height deviations of up to 17mm are possible. Additional deviations 

are possible depending on the tripod that is used (due to distance between laser axis and tilt axis of 

tripod), best results will be achieved by using the adaptor LSA360 on a middle column of a tripod. 


When using the Leica DISTO D8 over larger distances (>10m) we recommend to measure on a 

vertical target plate like e.g. the setup target plate in the scope of delivery. Please note, measure the 

reference point and all other points on the same height and this height is automatically compensated! 

What reference do I have to enter when using the profile measurement? After selecting this 

function you have first the possibility to enter a height for the reference point. This allows you to enter 

an absolute height that might be available of the reference point. This can either be the height of the 

reference point above sea level or more common a height that is based to another known reference 

point in a system (e.g. the reference point in level 1 is 3.503m above the reference point in level 0). For 

simple comparison measurements just leave it at zero. 

Does the double tilt measurement with two measured distances only works on back bent objects? 

No, there is no limitation regarding fore or back bent objects in using this function. The only thing is 

that you need to stand straight in front of the measured object (no horizontal angles are considered in 

calculation). This fact makes this function to one of the most versatile ones in the whole laser distance 

measurer industry. 

• Measure the length of a pitched object (stand straight in front of the object, main result) 

• Measure the pitch of the object (stand straight in front of the object, 2nd result) 

• 

• 

Measure the horizontal distance of two objects you can not measure direct horizontally (stand 

straight in front of the object, 2nd result) 

Measure the height difference of two points that are not in a vertical line (2nd result) 

Can I use the Leica DISTO D8 to measure overhead? Yes, with the Leica DISTO D8 you can 

measure any angle, even overhead. Only when using indirect measuring functions with tilt sensor you 

have to use the device in a range for angles of +/- 90°. 


Leica DISTO transfer works on all desktops, laptops, tablet PCs and UMPCs equipped with Microsoft 

Windows SE, ME, XP or Vista. Of course the computer must have a Bluetooth® interface or you have to 

install a Bluetooth® stick. Using an external Bluetooth® stick the computer must fulfill the requirements 

of the Bluetooth® stick. 


transfer works on PDAs with Bluetooth® interface as long it has Windows Mobile 2003 SE respectively 

2005 or Windows Mobile 5.0 and Windows Mobile 6.0 installed. Very good experience we have with 

PDA devices from HP. Of course to install DISTO transfer on a PDA a PC is required. On this PC 






Does DISTO transfer support the use of mobile phone like blackberry or Smart phone with 

Windows Mobile 6.0? DISTO transfer does not work on mobile phones except of Smart phones 

with Windows Mobile 6.0. Please note that these Smart phone only have a reduced version of Excel 


technology. 





be transferred in any application window that is active in the position of the cursor. This very versatile 

procedure that you can use your Leica DISTO with almost every Windows application. You only need 


below), tabulator (in Excel® the cursor jumps to the cell to the right)). 

Which limitations does the bluetooth® technology have for the use with Leica DISTO? 

Bluetooth® is a standard for wireless data transfer. The Leica DISTO is working with Bluetooth® 

class 2 which allows to transfer data to a computer in a range of 0,3 and 10m (so do not put the Leica 

DISTO on your computer because the connection might drop off). The maximum range will not be 

achieved if you want to transfer data e.g. through walls. You also have to take care that the connection 

remains between the measurements. If the connection drops and you are coming back into the specified 

range the connection will be build up again after a few seconds. If you are transferring data when the 

units are not connected you will receive an error message i240. In this case wait for the reconnection 

and send the data again. Generally problems with connectivity can occur when you are working with 

many WIFI devices working at the same time (e.g. hotel lobbies, meeting or seminar rooms, ...) 

Which bluetooth® driver are supported by Leica DISTO transfer PC? Leica DISTO transfer 

PC supports directly the Bluetooth® driver from Microsoft® and Broadcom® (Widcomm-driver). If your 

computer is working with a different driver you can uninstall it (Control panel -> Remove programs) and 

restart your computer. Follow the instruction to install the recommended Microsoft® driver. 

Alternatively you can start the program Leica DISTO transfer – Bluetooth install. Further instructions 

and the name of the installed driver are displayed in a new window. Click for using a virtual Bluetooth 

COM-interface. Use the Bluetooth manager to create the connection (pair). If you are asked to enter a 

code please type in the field „0000“. The connection between the Leica DISTO and your PC should 

be established automatically each time you are starting Leica DISTO transfer. 

Can I use the DISTO transfer program together with more than one Leica DISTO? Yes you 

can. You have to start the Bluetooth® setup with all instruments switched on (Bluetooth® also on). All 

DISTOs will be displayed with the corresponding com-port it will be connected to. You have now to 

start DISTO transfer multiple times and each transfer will connect to a different DISTO. please note 

that from all transfer programs the data will be transferred in the active window. 

Can I use my Leica DISTO together with AutoCAD®? Yes you can. During the installation of Leica 

DISTO transfer PC it will be checked whether you are having an AutoCAD® installation on your 

computer. If this is the case an AutoCAD® plugIn will be installed. This plugIn enables you to draw 

layouts by using the navigation keys and by transfering measurement data from the Leica DISTO to 

the PC. If you are using the angle tracking function on the Leica DISTO D8 AutoCAD® calculates the 

horizontal distance each time for the layout. If the measured angle is >75° the distance is interpreted as 

a height and the calculated vertical height is added to the drawing. When going into 3D display mode 

in AutoCAD® you can see the 3D layout. Please note that the transferred height is only used for the 

current measurement chain. 

How can I install the AutoCAD® PlugIn subsequently? When you are starting the Leica DISTO 

transfer program it will be checked whether there is a AutoCAD® installation on the computer. If this is 

the case the plugIn will be installed automatically. 


How do I have to start the AutoCAD® PlugIn? Start the AutoCAD® program and type the command 

„leicadisto“ into the command line of AutoCAD®. Leica DISTO transfer will automatically be started. 

Which other software is available to use with my Leica DISTO D8? There are numerous provider 

of specific software which supports Leica DISTO existing. The combination of a good software and 

Leica DISTO only make the real customer benefit. A list with third party software developer that are 

known by us you can find on our webpage http://www.leica-geosystems.com/cpd/en/support/lgs_4777. 

htm. You will be amazed seeing the different opportunities by these software. 

How can I get one extra year of warranty for the Leica DISTO D8? Our standard warranty of 2 



ALL AbOuT DISTO D5 

How many zoom levels does the Leica DISTO D5 have? The integrated digital Pointfinder in the 

device has 1x, 2x and 4x zoom. You can see on the left up corner which zoom level you have selected. 

To change from one zoom level to the next one you have to press the “Digital Pointfinder” key . 

Can the brightness in the digital Pointfinder be adjusted? Yes, on the screen of the digital Pointfinder 

on top of the crosshair you see a symbol existing of a “Sun” and a “+” and “-“. By pressing the “Plus” 

and “Minus” key you are able to adjust the brightness in 5 steps. 

Why is the laser dot on distance on short distances not centered in the crosshair? It is the 

parallax effect due to the distance between the laser window and the digital pointfinder optics. This 

effect occurs only when the digital pointfinder is used on targets below 10m. In this case the laser dot 

appears displaced in reference to the crosshair. This is not an error !! For distances below 10m please 

rely on the real laser dot. 

How accurate is the tilt sensor in the Leica DISTO D5? The accuracy of the tilt sensor in the 

device is ±0.3° to the laser beam respectively ±0.3° to the housing of the device. 

What units of tilts are integrated into the Leica DISTO D5? You can set the Leica DISTO D5 

to use different tilt units. Select in the menu the submenu “Units” and choose between ° , %, in/ft and 

mm/m. 

-> The level function in the right hand top corner of the display can also be switched on/off in the 

submenu “level”. It is always set to 0.0° and can not be changed into a different unit for tilts. 

What is the angular range of the tilt sensor in the Leica DISTO D5? The integrated tilt sensor in 

the Leica DISTO D5 functions in the range ±45° and at a transverse tilt of < ±10°. If the tilt is in the 

range > ±50° an info code “i160” appears in the display, which means that the device is being used 

outside its permissible range. 

If the device is held at > ±10° transversely, the info code “i156” appears in the display and indicates that 

the device is tilted too much. 

What has to be considered in the Trapezoid Function 2? The inclination sensor in the Leica DISTO 

D5 is limited to ±45°. So the second measurement can only be done if the angle is < ±45°. ,If the angle 

is > ±50° you will get the info code “i160”. 


Can the tilt sensor of a Leica DISTO D5 be calibrated by the user? You can recalibrate the zero 

level of the integrated tilt sensor. In the menu there is a special point for this calibration. If you enter this 

submenu you will be guided through the process. Please now proceed the following: 

Put the device on a nearly horizontal flat surface (e.g.table) 

1. Carry out the first measurement by pressing “ON/DIST” key on a level surface. The device confirms 

the measurement. 

2. Rotate the device horizontally 180°. 

3. Press the “=/Menu” key to confirm that the device was rotated 180°. 

4. Press the “ON/DIST” key and take the second measurement. The device confirms the 

measurement. 

-> The zero level of the tilt sensor is now calibrated 


to obtain detailed information in the Leica DISTO D5 about the measurements of areas, volumes, 

Pythagorean and trapezoid functions. After the measurements have been taken, keep the relevant 

function key pressed. A small red triangle on the bottom left hand of the display is showing that there 

are 2nd Results available. 

What accessories are recommended for the Leica DISTO D5? 

Leica Tripod TRI100 For long distances we recommend using a tripod, even indoors. A tripod provides 

additional steadiness and therefore allows accurate targeting, especially over long distances. We 

particularly recommend the Leica TRI100 tripod. 

Target Plate For measurement especially outdoors and in very bright conditions it is very helpful to use 

a target plate. We offer different versions in our accessory range. 

Can the Leica DISTO D5 also be used to measure horizontal angles? No, the integrated tilt 

sensor can only measures vertical angles. If the device is held at a transverse tilt angle greater than 

±10° the display shows an info code “i156”, which means that the device is required to be held level 



example, if a distance of 10m is measured at an angle of 10°, the error on uncertainty on measurement 

on the direct horizontal distance (fd) is 9mm. If a distance of 10m is measured at an angle of 45°, the 

uncertainty of measurement on the direct horizontal distance (fd) is 37mm. 

-> in order to have best results with the direct horizontal distance measurements, considering the 

deviation of the tilt sensor, use the Leica DISTO D5 as flat as possible. 










Which customer segment would find the Leica DISTO D5 of most use for everyday tasks? 

The Leica DISTO D5 is a great measurement tool for a wide range of target groups and is a superbly 

device especially designed for outdoor tasks. The device is particularly suitable, but of course not 

exclusively, for the following users: Architects, General Construction, Painter, Facade Workers, Joiner, 

Fireman, Surveyors, Facility Managers, Civil Engineer, Real Estate, Gardening Companies, Educational 

Institutions, Electrical Services, Insurance Companies, Scaffolding, Telecommunications, Police, etc. 

What is the circle on the keypad above the “Timer” key? The Leica DISTO D5 has a sensor 

to detect the brightness of the display. If the device is used outside in bright sunshine this sensor 

automatically adjusts the brightness for the display to save energy. Additionally an adjustment can be 

made in the menu. In the relevant submenu the brightness of the entire display can be adjusted in 6 

steps. 

Can the historical storage memory of 20 values in the device be erased? Yes, the historical 

storage memory in the device can be erased by pressing the “Clear Off” and “Storage” keys - both 

pressed at the same time and held for 2 seconds. 

Which batteries should I use for the Leica DISTO D5? In general you can use any alkaline battery 

or any rechargeable batteries (2xAA). In the scope of delivery we provide high quality batteries and we 

recommend to use such batteries or any (NiMH) batteries. 

Can I enter a value that is constantly added / subtracted to my measured value? (Offset) Yes, in 

the “Menu” you can go to the “Offset Icon” and enter a value that will constantly be added / subtracted 

from your measured distance value. If an offset value is entered you will see the adequate symbol - a 

triangle with plus or respectively minus next to the laser symbol. 

-> If you want to set the offset value back to zero, enter the menu point “Offset” and press the “Clear/ 

Off” key. 

Can I adjust / edit the constant to a number that I continuously need for further measurements? 

Yes, the saved constant “C” can be adjusted to any desired number that is required. Go to the constant 

by pressing the “Memory” key once. Now press the “=/Menu” key long. The constant value’s background 

is changing to show deep grey. Now you can adjust the constant with the “Plus” and “Minus” key to any 

desired value. Press the “=/Menu” key short to save the new entered value. The constant “C” is now 

saved. 

What is the Long Range (LR) Mode? For long distances under unfavorable conditions (e.g. long 

distances and very bright sunlight) we recommend to use the special integrated Long Range (LR) Mode 

. To select the mode please enter the menu and select the “LR Mode”. If the “LR Mode” is turned on in 

the menu you will see the letter “LR” right next to the laser symbol. This mode will allow you to make 

measurements that were not possible before because most of the time you would receive the info code 

“i255” (too less signal). When using this special Long Range (LR) Mode the measuring time increases 

(it may take up to 7sec) and above 30m the maximum deviation increases to ±0.15mm/m. 

How do I know if the device is still measuring in the digital Pointfinder mode? When using the 

digital Pointfinder in any function, especially in the Long Range (LR) Mode, you will see a clock icon on 

the top of the display. The clock stays in the display until the measurement is finished. Please do not 

move the device before! 


How can I get one extra year of warranty for the Leica DISTO D5? Our standard warranty of 2 



All about DISTO D3 

How accurate is the tilt sensor in the Leica DISTO D3? The accuracy of the tilt sensor is +/- 0.3° 

to the laser beam and +/-0.3° to the housing. The accuracy varies according to the measured angle and 

distance. The horizontal distance error (fd) and the height error (fh) can be calculated as follows: 




fa = possible angular error fd = d * cos (a) – d * cos (a + fa) 

For example, if a distance of 10m is measured at an angle of 10°, the error on the direct horizontal 

distance (fd) is 9mm. If a distance of 10m is measured an angle of 45°, the error on the direct horizontal 

distance (fd) is 37mm. To obtain the best result using indirect measurement and minimise the deviation, 

the device should be held as close to the horizontal as possible. 

What is the angular range of the tilt sensor in the Leica DISTO D3? The integral tilt sensor in 

the Leica DISTO D3 functions in the range +/- 45° and at a transverse tilt of > +/- 10°. The display 

indicates if the tilt is in the range >+/- 50°. A line appears on the display with the text max. and an 

infocode i 160, which means that the device is being used outside its permissible range. If the device 

is held at > +/- 10° transversely, a similar line appears on the display, which indicates the transverse tilt 

with the text “max”. The infocode i 156 indicates that the device is tilted too much and that you should 

be aware that inaccurate measurements would be taken. 

What units of tilt are integrated into the Leica DISTO D3? You can set the Leica DISTO D3 to 

use different units of tilt. The user can select between °& %. The units can be changed in menu item 2 

Can a Leica DISTO D3 be calibrated by the user? The user can calibrate the device’s tilt sensor. 

The angle sensor is switched on by pressing the function key once. Then two measurements are taken 

on a flat surface. The first measurement is taken and a note is made of the measured angle a. The 

device is then turned through exactly 180°, the second measurement is taken and a note is made of the 

measured angle b. The value x to which the device must be corrected is calculated as follows: 

x = -(a+b) /2 


same time for 2 seconds. The correction value x can be entered here using the “plus” and “minus” keys. 


Is it possible to obtain detailed information about the measurements taken? Yes, it is possible to 

obtain detailed information about the measurements of areas and volumes in the Leica DISTO D3: 

After the measurements have been taken (area/volume), the “Area/Volume” key must be held down 

and then detailed information about the measurements carried out is shown in the display. 

What accessories are recommended for the Leica DISTO D3? For long distances we recommend 

using a tripod, even indoors. A tripod provides additional steadiness and therefore allows accurate 


targeting, especially over long distances. We particularly recommend the Leica TRI100 tripod. Can 

the Leica DISTO D3 also be used to measure horizontal angles? No, the integral tilt sensor can only 

measure vertical angles. If the device is held at a transverse tilt angle greater than +/-10° the display 

shows an infocode 156, which means that the device is required to be held level (transversely). 

Which customer segment would find the Leica DISTO D3 of most use for everyday tasks? 

The Leica DISTO D3 is a great measurement aid for a wide range of target groups and is a superbly 

multitalented device for indoor tasks. The device is particularly suitable, but of course not exclusively, 

for the following users: architects, interior architects, electricians, carpenters, kitchen installers, floor 

layers, joiners, heating engineers, window installers, decorators and many others. 

Can the automatic key and display illumination be switched off from the device? The automatic 

key and display illumination can be switched off in menu item 6. If the sensor is switched off, the device 

no longer illuminates the keys or display. 




ALL AbOuT DISTO A6 & ITS SOFTWARE DISTOTRAnSFER 


DISTO transfer works on all desktops, labtops, tablet PCs and UMPCs equiped with Microsoft 

Windows SE, ME, XP or Vista. Of course the computer must have a Bluetooth interface or you have to 

install a Bluetooth stick. Using an external Bluetooth stick the computer must fullfil the requirements of 

the Bluetooth stick. 


transfer works on PDAs with Bluetooth interface as long it has Windows Mobile 2003 SE respectivelly 

2005 or Windows Mobile 5.0 and Windows Mobile 6.0 installed. Very good expertience we have with 

PDA devices from HP.Of course to install DISTO transfer on a PDA a PC is required. On this PC 






Does DISTO transfer support the use of mobile phone like blackberry or Smartphone with 

Windows Mobile 6.0? DISTO transfer does not work on mobile phones except of Smartphones 

with Windows Mobile 6.0. Please note that these Smartphone only have a reduced version of Excel 


technology. 




transfered in any application window that is active in the position of the cursor. This very versatile 

procedure that you can use your Leica DISTo with almost every Windows application. You only need 



below), tabulator (in Excel the cursor jumps to the cell to the right)). 

Which limitations does the bluetooth technology have for the use with Leica DISTO? Bluetooth 

is a standard for wireless tranfser of data. The Leica DISTO is working with Bluetooth class 2 which 

alows to transfer data to a computer in a range of 0,3 and 10m (so do not put the Leica DISTO on 

your computer because the connection might drop off). The maximum range will not be achieved if 

you want to transfer data e.g. through walls. You also have to take care that the connection remains 

between the measurements. If the connection drops and you are coming back into the specified range 

the connection will be build up again after a few seconds. If you are transfering data when the units are 

not connected you will receive a error message. In this case wait for the reconnection and send the data 

again. Generally problems with connectivity can occur when you are working with many WIFI devices 

working at the same time (e.g. Hotel lobbies, meeting or seminar rooms, ...) 

Does my software for the Leica DISTO plus also work with a Leica DISTO A6? DISTO 

transfer works with both instruments. The plusDraw and plusXL sontware only workd with the DISTO 

plus. When you are using any software of a third party developer with your DISTO plus and you are 

switching to the DISTO A6 it may happen that it will not work properly. in this case please ask your 

software supplier for an update. 

Can I use the DISTO transfer program together with more than one Leica DISTO ? Yes you 

can. You have to start the Bluetooth setup with all instruments switched on (Bluetooth also on). All 

DISTOs will be displayed with the corresponding com-port it will be connected to. You have now to start 

DISTO transfer mutiple times and each transfer will connect to a different DISTO. please note that 

from all transfer programms the data will be transfered in the active window. 

I have installed the DISTO transfer software on my computer but it is not working properly. So 

the connection is not build up, data are not transfered even the devices are connected or I am 

getting error messages on my DISTO . What can I do? DISTO transfer supports the Bluetooth 

driver (stack) of Broadcom (Widcomm) and Microsoft (coming as standard with your Windows operating 

system). Sometimes when you buy a computer you will receive it preinstalled from the manufacturer. 

There it can happen that a manufacturer is using a different Bluetooth driver from another software 

provider. It might happen that you will have problems with the connectivity of your devices. 

In this case you will have to open the Control Panel and chose Add/Remove programs. If there is 

another driver than Widcomm or from Microsoft installed please select it and remove it from your 

computer. Make sure your Bluetooth is switched on and restart your computer. The Bluetooth module 

should be detected from the Windows and it will suggest to install the standard driver. Please click yes 

and follow the furtehr instructions. 

Which other software is available to use with my Leica DISTO A6? There are numerous provider 

of specific software which supports Leica DISTO existing. The combination of a good software and 

Leica DISTO only make the real customer beneftit. A list with third party software developer that are 

known by us you can find on our webpage http://www.leica-geosystems.com/cpd/en/support/lgs_4777. 

htm You will be amaized seeing the different oppotunities by these software. 


ALL AbOuT DISTO A8 

How accurate is the inclination sensor in the Leica DISTO A8? The accuracy of the inclination 

sensor to the laser beam is +/- 0.15° and +/-0.3° towards the bottom of the housing. Depending on the 

measured angle and the distance the accuracy varies. E.g in measuring an angle of 10° and a distance 

of 10m the horizontal mistake is 0.5cm and the mistake in height is 2.6cm. If an angle is measured of 

60° and a distance of 10m the horizontal mistake is 2.3cm and the mistake in height is 1.3cm. In order 

to have best results with indirect measurements considering the deviation of the inclination sensor use 

the Leica DISTO A8 as follows. For measuring distances use the instrument as flat as possible. If you 

need to measure heights use the instrument as steep as possible. 

What different units for inclination are integrated in the Leica DISTO A8? The Leica DISTO 

A8 offers a variety of commonly international used units for inclination measurements. The enduser 

has the opportunity to individually choose from the following options: +/- 90.00°, +/-180.00°, +/-360.00°, 

0.00%, 0.0 mm/m and 0.00 in/ft (equivalent to a pitch). 

Is it also possible to measure indirect heights starting at the bottom of the object as well? Yes, 

function two behind the indirect measurement key can be measured both ways. It does not matter if the 

first measurement is the top of the object and then the bottom or if the first measurement is the bottom 

of the object and the second one the top, both ways are possible. 

What are the advantages of the calibration certificate that is included in each Leica DISTO 

A8? The included calibration certificate is a great use for each customers that is using the device in 

measuring applications for officials. It is standardized after EN 10201-3.1. The documented values 

were measured with accredited devices in our laboratory. More information especially to the subject 

recalibration you find on our website under Support/FAQs. 

Is it possible to get some detailed information on the measurements I have completed? Yes, 

it is possible to get detailed information of the completed measurements for the following functions 

integrated in the Leica DISTO A8: area, volume, and on all functions behind the indirect measurement 

key. If you press the function key you are in again for a longer time you will receive detail information of 

the completed measurement. 

Compared to the Leica DISTO A5 what are the new features the Leica DISTO A8 offers? 

Compared with the Leica DISTO A5 on the A8 there are two new keys on the keypad. First of all 

instead the optical viewfinder which was integrated in the Leica DISTO A5 the A8 now has a digital 

viewfinder with 3fold digital zoom. That opens complete new measurement possibilities especially in 

difficult lighting conditions. Additionally behind the indirect measurement key you will find a numerous 

variety of new possibilities besides the well known Pythagoras. This is also possible due to the new 

integrated inclination sensor. 

What accessories are necessary to use with the Leica DISTO A8? It is strongly recommended to 

use the Leica DISTO A8 with a tripod which really helps to make the measurements more accurate 

by providing a stable reference for longer distances and exact aiming. 

Can the Leica DISTO A8 be used for horizontal angles? No, the inclination sensor only allows 

measuring vertical angles by holding the instrument with the display upwards. If you skip the instrument 

by more than 20° sideways it you will get an error message on the display. 


For which segments is the Leica DISTO A8 a great help in day to day business? The Leica 

DISTO A8 is the perfect measuring help for several different target groups just to mention a few of 

them it would be: Scaffolding, Forestry and Wood companies, cable companies, telecom, underground 

construction, crane builders, carpenters, joiners, architects and many more. 

ERROR MESSAGES 

What does the displayed message E 255 mean? The return signal is too weak, measuring times are 

too long. The measured distance must be more than 250mm. Use a target plate to reduce measuring 

times. 

What does the displayed message E 256 mean? The return signal is too strong. If using target 

plates, the white side should be used for measuring short distances. 

What does the displayed message E 272 and E 288 mean? Turn the instrument off and on again. 

If the messages continue to be displayed, the instrument has to be sent in for servicing, as there is an 

internal module error in the electronics. Please contact your dealer nearby. 

MEASuRInG TECHnIQuES 

What are favorable/unfavorable measuring conditions? 

• 

• 

• 

Materials with good reflecting characteristics, meaning they reflect the laser beam in a divergent 

(not mirrored!) manner 

Laser dot is brighter than the ambient light 

Betrieb Operating within the allowable temperature range (-10° + 50° C) 

unfavorable measuring conditions: 

• 

• 

• 

• 

• 

• 

• 

Highly reflective surfaces 

Highly absorbing surfaces, such as wet or dark surfaces 

Operating at the limits of the allowable temperature range 

Not waiting for temperature calibration 

Very intensive ambient light 

Shimmering 

For optical and safety reasons, do not measure against colorless liquids (water) or glass 

FAQ Measurement of areas for polygonal rooms 

You can measure the area of a polygonal room by taking it apart into triangles and rectangles. You have 

to split the layout of a room in triangles and rectangles which cover the whole area once. After this you 

can add all areas together and will get the total area of rooms with even complex layouts. At following 

link you will get a template with formulas where you can even transfer the data for the distances into 

the according cells.

LEICA DISTO FAQ

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