Leica DISTO D3a BT User manual

1Safety Instructions
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User Manual
English
Congratulations on the purchase of your
Leica DISTO™ D3a BT .
Carefully read the Safety Instruc-
tions and the User Manual before
using this product.
The person responsible for the instrument must
ensure that all users understand these directions and
adhere to them.
Contents
Safety Instructions .............................................1
Start-up................................................................ 6
Menu functions ...................................................9
Operation...........................................................11
Measuring ..........................................................12
Functions ...........................................................13
Working with BLUETOOTH® ............................19
Appendix ............................................................20
Safety Instructions
Symbols used
The symbols used in the Safety Instructions have the
following meanings:
WARNING:
Indicates a potentially hazardous situation or
an unintended use which, if not avoided, will result in
death or serious injury.
CAUTION:
Indicates a potentially hazardous situation or
an unintended use which, if not avoided, may result
in minor injury and/or in appreciable material, finan-
cial and environmental damage.
)Important paragraphs which must be adhered
to in practice as they enabled the product to be used
in a technically correct and efficient manner.
Use of the instrument
Permitted use
• Measuring distances
• Computing functions, e. g. areas and volumes
• Storing measurements (BLUETOOTH®)
•Measuringtilts

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Safety Instructions Leica DISTO™ D3a BT 776750 gb
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Prohibited use
• Using the instrument without instruction
• Using outside the stated limits
• Deactivation of safety systems and removal of
explanatory and hazard labels
• Opening of the equipment by using tools (screw-
drivers, etc.), as far as not specifically permitted
for certain cases
• Carrying out modification or conversion of the
product
• Use after misappropriation
• Use of accessories from other manufacturers
without the express approval of Leica Geosys-
tems.
• Deliberate or irresponsible behaviour on scaf-
folding, when using ladders, when measuring
near machines which are running, or near parts of
machines or installations which are unprotected
• Aiming directly into the sun
• Deliberate dazzling of third parties; also in the
dark
• Inadequate safeguards at the surveying site (e.g.
when measuring on roads, construction sites, etc.)
Limits of use
)See section “Technical Data“.
The Leica DISTO™ is designed for use in areas perma-
nently habitable by humans, do not use the product
in explosion hazardous areas or in aggressive envi-
ronments.
Areas of responsibility
Responsibilities of the manufacturer of the orig-
inal equipment Leica Geosystems AG, CH-9435
Heerbrugg (for short Leica Geosystems):
Leica Geosystems is responsible for supplying the
product, including the User Manual and original
accessories, in a completely safe condition. (addi-
tional language versions can be found at:
www.disto.com.
Responsibilities of the manufacturer of
non-Leica accessories:
)The manufacturers of non-Leica accessories
for the Leica DISTO™ are responsible for developing,
implementing and communicating safety concepts for
their products. They are also responsible for the
effectiviness of these safety concepts in combination
with the Leica Geosystems equipment.
Responsibilities of the person in charge of
the instrument:
WARNING
The person responsible for the instrument
must ensure that the equipment is used in accor-
dance with the instructions. This person is also
accountable for the deployment of personnel and for
their training and for the safety of the equipment
when in use.
The person in charge of the instrument has the
following duties:

3Safety Instructions
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• To understand the safety instructions on the
product and the instructions in the User Manual.
• To be familiar with local safety regulations
relating to accident prevention.
• To inform Leica Geosystems immediately if the
equipment becomes unsafe.
Hazards in use
CAUTION:
Watch out for erroneous distance measure-
ments if the instrument is defective or if it has been
dropped or has been misused or modified.
Precautions:
Carry out periodic test measurements. Particularly
after the instrument has been subject to abnormal
use, and before, during and after important measure-
ments.
Make sure the Leica DISTO™ optics is kept clean and
that there is no mechanical damage to the bumpers.
CAUTION:
In using the instrument for distance measure-
ments or for positioning moving objects (e.g. cranes,
building equipment, platforms, etc.) unforeseen
events may cause erroneous measurements.
Precautions:
Only use this product as a measuring sensor, not as
a control device. Your system must be configured and
operated in such a way, that in case of an erroneous
measurement, malfunction of the device or power
failure due to installed safety measures (e.g. safety
limit switch), it is assured that no damage will occur.
WARNING:
Flat batteries must not be disposed of with
household waste. Care for the environment and take
them to the collection points provided in accordance
with national or local regulations.
The product must not be disposed of with
household waste.
Dispose of the product appropriately in
accordance with the national regulations in
force in your country.
Always prevent access to the product by
unauthorized personnel.
Product specific treatment and waste
management information can be downloaded from
the Leica Geosystems home page at
http://www.leica-geosystems.com/treatment or
received from your Leica Geosystems dealer.
Electromagnetic Compatibility
(EMC)
The term "electromagnetic compatibility" is taken to
mean the capability of the product to function
smoothly in an environment where electromagnetic
radiation and electrostatic discharges are present,
and without causing electromagnetic interference to
other equipment.

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WARNING:
The Leica DISTO™ conforms to the most strin-
gent requirements of the relevant standards and
regulations. Yet, the possibility of it causing interfer-
ence in other devices cannot be totally excluded.
CAUTION:
Never attempt to repair the product yourself. In
case of damage, contact the local dealership.
FCC statement (applic. in U.S.)
This equipment has been tested and found to comply
with the limits for a Class B digital device, pursuant to
part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful inter-
ference in a residential installation.
This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful
interference to radio communications.
However, there is no guarantee that interference will
not occur in a particular installation.
If this equipment does cause harmful interference to
radio or television reception, which can be deter-
mined by turning the equipment off and on, the user
is encouraged to try to correct the interference by
one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment
and receiver.
• Connect the equipment into an outlet on a circuit
different from that to which the receiver is
connected.
• Consult the dealer or an experienced radio/TV
technician for help
WARNING:
Changes or modifications not expressly
approved by Leica Geosystems for compliance could
void the user’s authority to operate the equipment.
Use of the product with
BLUETOOTH®:
WARNING:
Electromagnetic radiation can cause distur-
bances in other equipment, in installations (e.g.
medical ones such as pacemakers or hearing aids)
and in aircraft. It can also affect humans and animals.
Precautions:
Athough this product conforms to the most stringent
standards and regulations, Leica Geosystem cannot
totally exclude the possibility of harm to people and
animals.
• Do not use the product near petrol stations,
chemical plants, in areas with a potentially explo-
sive atmosphere and where blasting takes place.
• Do not use the product near medical equipment.
• Do not use the product in airplanes.

5Safety Instructions
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• Do not use the product near your body for
extended periods.
CAUTION:
Never attempt to repair the product yourself. In
case of damage, contact the local dealership.
Laser classification
Integrated distancemeter
The Leica DISTO™ produces a visible laser beam
which emerges from the front of the instrument.
It is a Class 2 laser product in accordance with:
• IEC60825-1 : 2007 "Radiation safety of laser
products"
Laser Class 2 products:
Do not stare into the laser beam or direct it towards
other people unnecessarily. Eye protection is
normally afforded by aversion responses including
the blink reflex.
WARNING:
Looking directly into the beam with optical aids
(e.g. binoculars, telescopes) can be hazardous.
Precautions:
Do not look directly into the beam with optical aids.
CAUTION:
Looking into the laser beam may be hazardous
to the eyes.
Precautions:
Do not look into the laser beam. Make sure the laser
is aimed above or below eye level. (particularly with
fixed installations, in machines, etc.)

6
Start-up Leica DISTO™ D3a BT 776750 gb
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Labelling
Position of the product label:
Start-up
Inserting/replacing batteries
1 Remove battery compartment lid and attach
handstrap.
2 Insert batteries, observing correct polarity.
3 Close the battery compartment again. Replace
the batteries when the symbol flashes perma-
nently in the display.
)Only use alkaline or rechargeable batteries.
)Remove the batteries before any long period
of non-use to avoid the danger of corrosion.
Laser Radiation
Do not stare into the beam
Laser class 2
acc. IEC 60825-1:2007
Maximum radiant power: <1mW
Emitted wavelength: 620-690nm
Beam divergence: 0.16 x 0.6 mrad
Pulse duration: 1 x 10 -9 s

7Start-up
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Changing the reference point
(multifunctional endpiece)
The instrument can be adapted for the following
measuring situations:
• For measurements from an edge, fold out the
positioning bracket until it first locks in place.
• For measurements from a corner, open the posi-
tioning bracket until it locks in place, then push
the positioning bracket lightly to the right to fold
it out fully.
A built-in sensor automatically detects the orienta-
tion of the positioning bracket and adjusts the zero
point of the instrument accordingly.
Keypad
1ON/DIST(On/measuring)-button
2 Horizontal distance - button
3 Plus (+) - button
4 Minus (-) - button
5Area/volume-button
6 Storage - button
7 Reference - button
8Functions-button
9Timer-button
10 Second function button
11 Menu/equal - button
12 Clear/off - button
13 Bluetooth button
11
3
2
1
10
5
9
7
12
13
6
8
4

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Start-up Leica DISTO™ D3a BT 776750 gb
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Display
1Laseractive
2 Reference (front)
3 Reference (rear)
4 Reference (corner stop)
5 Measuring with the tripod
6 Stake out function
7 Single Pythagoras measurement
8 Double Pythagoras measurement
9 Double (partial height) measurement
10 Save constant value, call up constant value
11 Historical memory, call up values
12 Spirit level (numeric)
13 Battery status
14 Area/volume
15 Tilt
16 Horizontal distance measurement using tilt
17 Triangle area
18 Timer
19 Menu
20 Circumference
21 Wall area
22 Ceiling area
23 Intermediate line 1
24 Intermediate line 2
25 Intermediate line 3
26 Summary line
27 Information
28 Spirit level
29 Tilt angle
30 Distance measured
31 Indirect height
32 Detail display
33 Bluetooth Icon
1
2
3
4
21
30
22
31
32
5
20
29
613
15,16
147,8,9 19
18172733 12
28
10,11
23
24
25
26

9Menu functions
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Menu functions
Settings
The menu allows settings to be altered and perma-
nently stored. After switching off the device or
replacing the batteries the settings are stored.
Navigation in the menu
The menu allows settings to be made at the user
level. The instrument can be specifically configured to
your personal requirements.
General description
button (pressed long) - You are in the ,
the units set and the first menu item "Unit" are
displayed.
button (pressed short) pages through each
menu item.
or button to make changes in menu items.
button (pressed short) brings up the next menu
item.
A long press on the button in the menu confirms
the new settings made in the submenu items .
Pressing the button for longer in the menu
allows you to quit the settings function without
saving.
EXIT
3
4
5
6
7
2
1
0.0°

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Menu functions Leica DISTO™ D3a BT 776750 gb
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Setting the unit for distance
measurements
The following units can be set:
Setting the unit for tilt
measurements
The following units can be set for tilt measurements:
Measuring with the tripod ( )
The reference must be appropriately adjusted in
order to be able to take correct measurements with
a tripod. To do this select ON in this menu item.
You can switch the reference on the tripod on or off.
The setting can be seen on the display .
Beep ( )
You can switch the beep on or off.
Level in status field ( )
The level (in °) in status field can be switched on or
off.
Display illumination ( )
The display illumination can be turned on or off.
Distance Area Volume
1. 0.000 m 0.000 m² 0.000 m³
2. 0.0000m 0.000 m² 0.000 m³
3. 0.00 m 0.000 m² 0.000 m³
4. 0.00 ft 0.00 ft² 0.00 ft³
5. 0'00'' 1/32 0.00 ft² 0.00 ft³
6. 0.0 in 0.00 ft² 0.00 ft³
7. 0 1/32 in 0.00 ft² 0.00 ft³
Units for tilt
1. +/- 0.0°
2. 0.00%

11 Operation
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Reset - returning the instrument to
the factory settings ( )
The instrument has a RESET function. When you
select the menu function RESET and confirm, the
instrument defaults to the factory settings.
A reset returns the following values to their factory
settings:
• Reference (rear)
• Display illumination (ON)
•Beep(ON)
• Unit (m(mm))
• Stack and memory are erased
)All customised settings and stored values are
also lost.
Operation
Switching on and off
Switches on the instrument and laser. The
display shows the battery symbol until the
next button is pressed.
Pressing this button for longer switches
the instrument off.
The instrument switches off automatically
after six minutes of inactivity.
CLEAR button
The last action is cancelled. While making
area or volume measurements, each single measure-
ment can be deleted and remeasured in series.
Reference setting
The default reference setting is from the rear of the
instrument.
Press this button to take the next measurement
from the front edge . A special beep sounds when-
ever the reference setting is changed.
After a measurement the reference returns automat-
ically to the default setting (rear reference).
Press this button for longer the front reference
is set permanently.
Press this button, the rear reference is set again.

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Measuring Leica DISTO™ D3a BT 776750 gb
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Measuring
Single distance measurement
Press to activate the laser. Press again to trigger
the distance measurement.
The result is displayed immediately.
Tilt measurement
)The tilt sensor measures tilts between ± 45°.
)During the measurement of tilt, the instru-
ment should be held without transverse tilt, as far as
possible, (± 10°).
Horizontal measurement
Press button to activate horizontal measure-
ment in the instrument. The following symbol
appears in the display . If the button is active,
the horizontal distance is displayed in the summary
line for each distance measurement (up to max. +/-
45° and up to max. a transverse tilt of +/-10°).
Press the button for longer to display additional
information on the measurement, for example the tilt
angle , the distance measured and the indi-
rect height .
Press button again to switch off horizontal
measurement.
Minimum/maximum measurement
This function allows the user to measure the
minimum or maximum distance from a fixed
measuring point. It can also be used as to determine
spacings.
It is commonly used to measure room diagonals
(maximum values) or horizontal distances (minimum
values).
Press and hold down this button until you hear
a beep. Then slowly sweep the laser back and forth
and up and down over the desired target point - (e.g.
into the corner of a room).
Press to stop continuous measurement. The
values for maximum and minimum distances are
shown in the display as well as the last measured
value in the summary line.
min. max.

13 Functions
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Laser continuous
Press and hold down the key when switching
on the device until the character appears perma-
nently in the display and a beep sounds. Every further
press of the key releases a distance measure-
ment.
Press the key and hold to switch the device
and Laser continuous operation off.
)If the laser is in continuous operation mode,
the device switches off automatically after 15
minutes.
Functions
Addition / subtraction
Distance measuring.
The next measurement is added to the previous
one.
The next measurement is subtracted from the
previous one.
This process can be repeated as required.
Press this button and the result is then always
shown in the summary line.
The last step is cancelled.
Area
Press once. The symbol appears in the
display.
Press this button to take the first length
measurement (e.g. length).
Press it again to take the second length
measurement (e.g. width).
The result is displayed in the summary line.
Press the button for longer to calculate the
circumference .

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Functions Leica DISTO™ D3a BT 776750 gb
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Volume
Press this button twice. The symbol
appears in the display.
Press this button to take the first length
measurement (e.g. length).
Press this button to take the second length
measurement (e.g. width).
Press this button to take the third length measure-
ment (e.g. height).
The volume then appears in the summary line.
Press the button for longer to display additional
room information such as ceiling/floor area ,
surface area of the walls , circumference .
Tilt measurement
Press this button once to activate the tilt
sensor. The symbol appears in the display. The
tilt is continuously shown as ° or % depending on the
setting.
Press to measure the inclination and the
distance.

15 Functions
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Triangular area
The area of a triangle can be calculated by the
measurement of three sides.
Press the key two times - the triangle symbol
appears in the display.
Press the key and measure the first side of the
triangle.
Press the key and measure the second side of
the triangle.
Press the key and measure the third side of the
triangle.
The result is shown in the summary row.
Press and hold the key to display additional infor-
mation about the measurement, such as the angle
included by the first two measurements and the
perimeter of the triangle .
Stake out function
Two different distances (a and b) can be entered into
the instrument and can then be used to mark off
defined measured lengths, e.g. in the construction of
wooden frames.
Entering stake out distances:
Press this button three times and the stake out
function symbol appears in the display .
The value (a) and the corresponding intermediate line
flash.
By using and , you can adjust the values
(first a and then b) to suit the desired stake out
distances. Holding the buttons down increases the
rate of change of the values.
Once the desired value (a) has been reached it can be
confirmed with the button.
The value (b) and the intermediate line flashes (the
11
2
3
0.625 m 0.625 m 0.625 m
0.625 m 0.625 m 1.025 m
a
b
b

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Functions Leica DISTO™ D3a BT 776750 gb
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defined value (a) is automatically adopted). Value (b)
can be entered using and .
The defined value (b) is confirmed with the
button.
Pressing the button starts the laser measure-
ment. The display shows required stake out distance
in the summary line between the stake out point
(first a and then b) and the instrument (rear refer-
ence).
If the DISTO™ is then moved slowly along the stake
out line the displayed distance decreases. The instru-
ment starts to beep at a distance of 0.1m from the
next stake out point.
The arrows in the display indicate in which direc-
tion the DISTO™ needs to be moved in order to
achieve the defined distance (either a or b). As soon
as the stake out point is reached the beep changes.
The function can be stopped at any time by pressing
the button.
Indirect measurement
The instrument can calculate distances using
Pythagoras’ theorem.
)Make sure you adhere to the prescribed
sequence of measurement:
• All target points must be in a horizontal or vertical
plane.
• The best results are achieved when the instru-
ment is rotated about a fixed point (e.g. with the
positioning bracket fully folded out and the
instrument placed on a wall).
• The minimum/maximum function can be used -
see explanation in "Measuring -> Minimum/
maximum measurement". The minimum value
must be used for measurements at right angles to
the target; the maximum distance for all other
measurements.
)Make sure that the first measurement and the
distance to be measured are at right angles. Use the
Minimum/maximum function, as explained in
"Measuring -> Minimum/maximum measurement".
a
b
b

17 Functions
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Indirect measurement - determining a dis-
tance using 2 auxilliary measurements
e.g. for measuring building heights or widths. It is helpful
to use a tripod when measuring heights that require the
measurement of two or three measurements.
Press this button four times, the display shows
the following symbol . The laser is switched on.
Aim at the upper point (1) and trigger the
measurement. After the first measurement the value
is adopted. Keep the instrument as horizontal as
possible.
Press and hold down this button to trigger
continuous measurement, sweep the laser back and
forth and up and down over the ideal target point.
Press to stop continuous measurement (2). The
result is displayed in the summary line, the partial
results in the secondary line.
Indirect Measurement - determining a dis-
tance using 3 measurements
Press this button five times; the display shows
the following symbol . The laser is switched on.
Aim at the upper point (1) and trigger the
measurement. After the first measurement the value is
adopted. Keep the instrument as horizontal as possible
Press and hold down this button to trigger
continuous measurement, sweep the laser up and
down over the ideal target point.
Press to stop continuous measurement (2). The
1
2
3

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Functions Leica DISTO™ D3a BT 776750 gb
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value is adopted. Aim at the lower point and
press this button to trigger the measurement
(3). The result is displayed in the summary line, the
partial results in the secondary lines.
Indirect measurement - determining a chain
value using 3 measurements
e.g. determining the height between point 1 and
point 2 using three target points.
Press this button six times; the display shows
the following symbol . The laser is switched on.
Aim at the upper point (1).
Press this button and trigger the measurement.
After the first measurement the value is adopted. The
display flashes (2).
Triggers the measurement. After the second
measurement the value is adopted. The display
flashes (3).
Press and hold down this button to trigger
continuous measurement. Sweep the laser up and
down over the ideal target point.
Press this button to end continuous measure-
ment. The result is displayed in the summary line, the
partial results in the secondary lines.
Storage of constants/historical
storage
Storage of a constant
You can store and recall a frequently used value e.g.
height of a room. Measure the desired distance,
press and hold the button until the device beeps
to confirm storage.
Recalling the constant
Press this button once to recall the constant
and make it available for further calculations by
pressing button .
Adjusting the constant
Press the button for longer to change the constant
- the constant flashes, you can now change the
12
3

19 Working with BLUETOOTH®
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constant to the required value using the or
button. Press the button to save the constant.
Historical storage
Press this button twice and the previous 20
results (measurements or calculated results) are
shown in reverse order.
The and buttons can be used for navigation.
Press this button to use a result from the
summary line for further calculations.
Pressing the and buttons at the same
time erases all the values in historical storage.
Timer (self-triggering)
Press this button to set a 5-second time delay.
or
Press and hold down this button until the
desired time delay is reached (max. 60 seconds).
Once the key is released the remaining seconds until
measurement (e.g. 59, 58, 57...) are displayed in a
countdown. The last 5 seconds are counted down
with a beep. After the last beep the measurement is
taken and the value is displayed.
)The timer can be used for all measurements.
Working with BLUETOOTH®
Switching on BLUETOOTH® /
sending measurements
A quick press on the - key starts DISTO™ BLUE-
TOOTH®. The data connection must then be estab-
lished out from a Pocket PC / PC by the application
software. A BLUETOOTH® - icon will appear in the
display until this has been successfully completed.
BLUETOOTH® automatically switches off if the
connection to the Pocket PC / PC is not established
within 240 sec from when the BLUETOOTH® was
switched on.
)Whilst the first connection between the
Pocket PC/PC and the DISTO™ is being established, a
prompt for the Pin-code of the DISTO™ may be
displayed. In this case, enter the code 0000 into your
Pocket PC/PC.
Switching off BLUETOOTH®
BLUETOOTH® switches off as soon as the DISTO™ is
switched off.

20
Appendix Leica DISTO™ D3a BT 776750 gb
D
GB
F
I
E
P
NL
DK
S
N
FIN
J
CN
ROK
PL
H
RUS
CZ
The direction keys
Eight direction keys (identified by a small arrow near
the key) on the operator's keypad are used to
manoeuvre the cursor. The direction keys become
active when you switch to the second level (by
pressing the key). The distance measuring key is
active in both levels. The functionality of the direction
keys depends on the software used.
Transmitting the measurement
If your software supports the direction keys use them
to select the appropriate position for the cursor.
Press the button briefly to transfer the value
from the summary row to the pocket PC / PC.
Press the botton long to transfer all values from
the display.
For further details please consult your manual for the
software used.
During data transmission
If the data is not confirmed as being successfully
received by the Pocket PC/ PC then no new measure-
ment can be processed. The Info code "240" appears
in the display if no data transmission has taken place
after 2 seconds. Press the - key and repeat
the measurement and then transmit it.
)The free software supplied is designed to
provide the user with basic functionality. Leica
Geosystems provides no warranty for this free soft-
ware and offers no support for it. Leica Geosystems
accepts no liability whatsoever arising from the use
of the free software and is not obliged to provide
corrections nor to develop updates or upgrades.
You can find numerous commercial vendors of soft-
ware for a wide range of applications on our
homepage.
Appendix
Message codes
All message codes are displayed with either or
"Error". The following errors can be corrected:
Cause Remedy
156 Transverse tilt
greater than 10° Hold the instrument without any transverse
tilt
160 Main tilt direction,
angle too high
(> 45°)
Measure angle up to
max. ± 45°
204 Calculation error Repeat procedure
240 Data transfer error Repeat procedure