Bosch Glm 100 C Manual

							 English | 23
Bosch Power Tools2 609 141 026 | (1.7.13)
gBattery charge-control indicator
hLaser, switched on
iMeasurement reference level
kTemperature warning
lBluetooth® switched on
mCharging procedure
nSlow charging procedure
The Bluetooth® word mark and logos are registered trade-
marks owned by Bluetooth SIG, Inc. and any use of such 
marks by Robert Bosch Ltd. is under license.
Declaration of Conformity  
We declare under our sole responsibility that the product de-
scribed under “Technical Data” is in conformity with the fol-
lowing standards or standardization documents: 
EN 61010-1:2010, EN 60950-1:2006+A11:2009+
A1:2010+A12:2011+AC:2011, EN 60825-1:2007, 
EN 61326-1:2006-05, EN 300 328:2012-06, 
EN 301 489-1:2008-04, EN 301 489-1:2011-09, 
EN 301 489-17:2012-09, EN 62479:2010-09 and 
EN 60335 (battery chargers) according to the provisions of 
the directives 2011/65/EU, 2004/108/EC, 1999/5/EC.
Technical documents at:
Robert Bosch GmbH, PT/ETM9,
D-70745 Leinfelden-Echterdingen
13
Robert Bosch GmbH, Power Tools Division
D-70745 Leinfelden-Echterdingen
19.04.2013
Assembly
Battery Charging
Do not use a different battery charger. The battery 
charger provided is matched to the lithium ion battery in-
stalled in your measuring tool.Observe the mains voltage! The voltage of the power 
source must correspond with the data on the type plate of 
the battery charger.
Note: The battery is supplied partially charged. To ensure full 
battery capacity, completely charge the battery in the charger 
before using for the first time.
The lithium ion battery can be charged at any time without re-
ducing its service life. Interrupting the charging procedure 
does not damage the battery.
When the bottom segment of the battery charge-control indi-
cator g f la shes, onl y a  f ew mo re me asur emen ts c an b e c arr ied 
out. Charge the battery.
When the frame around the segments of the battery charge-
control indicator g flashes, measurements are no longer pos-
sible. Continued use of the measuring tool is only possible for 
a short period (e. g., for checking entries in the measured-val-
ue list, performing a calculation, etc.). Recharge the battery.
The charge procedure begins as soon as the mains plug of the 
battery charger is plugged into the socket outlet and the 
charge connector 23 is plugged into socket 15.
The battery charge-control indicator g indicates the charging 
progress. During the charging procedure, the segments flash 
one after the other. When all segments of battery charge-control 
indicator g are displayed, the battery is completely charged.
Disconnect the battery charger from the mains supply when 
not using it for longer periods.
Additionally, the battery can also be recharged via a USB port. 
For this, connect the measuring tool to a USB port using the 
micro USB cable. In USB operation (recharging, data trans-
mission), the charging duration n can be significantly pro-
longed.
The measuring tool cannot be used independently during the 
charging procedure. Usage is possible only in combination 
with a USB connection and the available software.
The Bluetooth® function switches off during the charging pro-
cedure. Existing connections to other devices are interrupt-
ed. This can lead to data loss.
Protect the battery charger against moisture!
Notes for Optimum Handling of the Battery in the 
Measuring Tool
Store the measuring tool only within the allowable tempera-
ture range, see “Technical Data”. As an example, do not leave 
the measuring tool in a vehicle in summer.
A significantly reduced working period after charging indi-
cates that the battery is used and must be replaced.
Observe the notes for disposal.
Operation
Initial Operation
Do not leave the switched on measuring tool unattend-
ed and switch the measuring tool off after use. Other 
persons could be blinded by the laser beam.
Protect the measuring tool against moisture and direct 
sun light. Double indirect height measurement
Indirect length measurement
Timer Function
Wall-surface measurement
Grade Measurement
Bluetooth® activated, connection established
Bluetooth® activated, no connection estab-
lished
Henk Becker
Executive Vice President
EngineeringHelmut Heinzelmann
Head of Product Certification
PT/ETM9
1
2
1
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Do not subject the measuring tool to extreme tempera-
tures or variations in temperature. As an example, do 
not leave it in vehicles for long time. In case of large varia-
tions in temperature, allow the measuring tool to adjust to 
the ambient temperature before putting it into operation. 
In case of extreme temperatures or variations in tempera-
ture, the accuracy of the measuring tool can be impaired.
Avoid heavy impact to or falling down of the measuring 
tool. After severe exterior effects to the measuring tool, it 
is recommended to carry out an accuracy check (see “Ac-
curacy Check and Calibration of the Grade Measurement” 
and “Accuracy Check of the Distance Measurement” on 
page 29) each time before continuing to work).
Switching On and Off
For switching on the measuring tool, the following possibili-
ties are given:
– Press the On/Off button 4: The measuring tool is switched 
on and is in length measurement mode. The laser is not ac-
tivated.
– Pressing the measuring button 2: Measuring tool and laser 
are switched on. The measuring tool is in length measure-
ment mode. When the measuring tool is inserted in the 
measuring rail 27, the grade measurement function is acti-
vated.
Do not point the laser beam at persons or animals and 
do not look into the laser beam yourself, not even from 
a large distance.
To switch off the measuring tool, press the On/Off button 4 
for a few seconds.
When no button on the measuring tool is pressed for approx. 
5 minutes, the measuring tool automatically switches off to 
save the batteries/rechargeable batteries.
When the angle is not changed for approx. 5 minutes when in 
the “Grade measurement” operating mode, the measuring 
tool automatically switches off to save the batteries/re-
chargeable batteries.
When switching off automatically, all stored values are re-
tained.
Measuring Procedure
When the measuring tool is inserted in the measuring rail 27, 
it is always in the length measurement or grade measurement 
function after switching on by pressing the measuring button 
2. Other measuring modes can be switched to by pressing the 
respective function/mode button (see “Measuring Func-
tions”, page 25). 
After switching on, the rear edge of the measuring tool is pre-
set as the reference level for the measurement. By pressing 
the reference level button 10, the reference level can be 
changed (see “Measuring Functions”, page 25).
Place the measuring tool with the selected reference plane 
against the desired starting point of the measurement (e. g. a 
wall).
Briefly press the measuring button 2 to switch on the laser 
beam.Do not point the laser beam at persons or animals and 
do not look into the laser beam yourself, not even from 
a large distance.
Aim the laser beam at the target surface. Briefly press the 
measuring button 2 again to initate the measurement.
When the laser beam is switched on permanently, the meas-
urement already starts after the first actuation of the measur-
ing button 2. In continuous measurement mode, the measure-
ment starts immediately upon switching on.
Typically, the measured value appears after 0.5 and latest af-
ter 4 seconds. The duration of the measurement depends on 
the distance, the light conditions and the reflection proper-
ties of the target surface. The end of the measurement is indi-
cated by a signal tone. The laser beam is switched off auto-
matically upon completion of the measurement.
When no measurement takes place approx. 20 seconds after 
collimating, the measuring tool automatically switches off to 
save the battery.
Selecting the Reference Level (see figure A)
For the measurement, you can select between four reference 
planes:
– The rear edge of the measuring tool or the front edge of the 
90 °  folded-out positioning pin 9 (e. g. when measuring on-
ward from outer corners),
– The tip of the 180 °  folded-out positioning pin 9 (e. g. when 
measuring from a corner),
– The front measuring-tool edge (e. g. when measuring on-
ward from a table edge),
– The centre of thread 19 (e. g. for tripod measurements).
To select the reference level, press button 10 until the re-
quested reference level is indicated on the display. Each time 
after switching on the measuring tool, the rear end of the 
measuring tool is preset as the reference level.
Subsequent changing of the reference level for measure-
ments that have already been carried out (e. g. when indicat-
ing measuring values in the measured-value list) is not possi-
ble.
“Basic Settings”
To access the “Basic settings” menu, press and hold the basic 
settings button 8.
Briefly press the basic settings button 8 to select the individ-
ual menu items.
Press the minus button 5 or the plus button 11 to select the 
setting within the menu items.
To exit the “Basic settings” menu, press the measurement 
button 2.
Basic Settings
Tone Signals
On
Off
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With exception of the “Permanent laser beam” setting, all ba-
sic settings are retained when switching off.
Continuous Laser Beam
Do not point the laser beam at persons or animals and 
do not look into the laser beam yourself, not even from 
a large distance.
In this setting, the laser beam also remains switched on be-
tween measurements; for measuring, it is only required to 
press the measuring button 2 once.
Measuring Functions
Simple Length Measurement
For length measurements, press button 12 until the “length 
measurement” indication   appears on the display.
To switch the laser on and for measuring, 
briefly press the measuring button 2 once 
each time.
The measured value is displayed in the re-
sult line c.
For several subsequent length measurements, the last meas-
ured results are displayed in the measured-value lines a.
Area Measurement
For area/surface measurements, press button 12 until the in-
dicator for area measurement   appears on the display.
Afterwards, measure the length and the width, one after an-
other, in the same manner as a length measurement. The laser 
beam remains switched on between both measurements.Upon completion of the second measure-
ment, the surface is automatically calcu-
lated and displayed in the result line c. 
The individual measured values are dis-
played in the measured-value lines a.
Volume Measurement
For volume measurements, press button 12 until the indica-
tor for volume measurement  appears on the display.
Afterwards, measure the length, width and the height, one af-
ter another, in the same manner as for a length measurement. 
The laser beam remains switched on between all three meas-
urements.
Upon completion of the third measure-
ment, the volume is automatically calcu-
lated and displayed in the result line c. 
The individual measured values are dis-
played in the measured-value lines a.
Values above 1000 000 m
3 cannot be indicated; “ERROR” 
appears on the display. Divide the volume to be measured in-
to individual measurements; their values can then be calculat-
ed separately and then summarized.
Continuous Measurement (Tracking) / Minimum/Maxi-
mum Measurement (see figure B)
For continuous measurements, the measuring tool can be 
moved relative to the target, whereby the measuring value is 
updated approx. every 0.5 seconds. In this manner, as an ex-
ample, you can move a certain distance away from a wall, 
while the actual distance can always be read.
For continuous measurements, press function mode button 8 
until the indicator for continuous measurement   appears on 
the display. To start the continuous measurement, press the 
measuring button 2.
The minimum measurement is used to determine the shortest 
distance from a fixed reference point. It is used, as an exam-
ple, for determining plumb lines or horizontal partitions.
The maximum measurement is used to determine the greatest 
distance from a fixed reference point. It is used, as an exam-
ple, for determining diagonals.
The current measuring value is displayed 
in the result line c. The maximal (“max”) 
and the minimal (“min”) measuring value 
are displayed in the measured-value lines 
a. It is always overwritten, when the cur-
rent length measurement value is less 
than the present minimal or larger than 
the present maximal value.
The previous minimal and maximal values are deleted by 
pressing the button for clearing the internal memory 4.
Pressing the measuring button 2 ends the continuous meas-
urement. The last measured value is displayed in the result 
line c. Pressing the measuring button 2 again restarts a con-
tinuous measuring run. Display Illumination
On
Off
Auto on/off
Digital vial
On
Off
Display rotation
On
Off
Permanent laser beam
On
Off
Unit of measure, distance 
(depending on country ver-
sion)m, ft, inch, ...
Unit of measure, angle   ° , %, mm/m
Basic Settings
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2 609 141 026 | (1.7.13)Bosch Power Tools
Continuous measurement automatically switches off after 
5 min. The last measured value remains indicated in the result 
line c.
Indirect Distance Measurement
Note: Indirect distance measurement is always less accurate 
than direct distance measurement. Depending on applica-
tion, greater measuring errors are possible than with direct 
distance measurement. To improve the measuring accuracy, 
we recommend using a tripod (accessory).
The indirect distance measurement is used to measure dis-
tances that cannot be measured directly because an obstacle 
would obstruct the laser beam or no target surface is available 
as a reflector. This measuring procedure can only be used in 
vertical direction. Any deviation in horizontal direction leads 
to measuring errors.
The laser beam remains switched on between the individual 
measurements.
For indirect length measurements, three measuring modes 
are available. Each measuring mode can be used for deter-
mining different distances.
a) Indirect height measurement (see figure C)
Press the function-mode button 8 until the indication for indi-
rect height measurement   appears on the display.
Pay attention that the measuring tool is positioned at the 
same height as the bottom measuring point. Now, tilt the 
measuring tool around the reference plane and measure dis-
tance “1” as for a length measurement.
Upon completion of the measurement, 
the result for the sought distance “X” is 
displayed in the result line c. The measur-
ing values for the distance “1” and the an-
gle “α”are displayed in the measured-
value lines a.
b) Double indirect height measurement (see figure D)
Press the function-mode button 8 until the indication for dou-
ble indirect height measurement   appears on the display.
Measure distances “1” and “2” in this sequence as for a 
length measurement.
Upon completion of the measurement, 
the result for the sought distance “X” is 
displayed in the result line c. The measur-
ing values for the distances “1”, “2” and 
the angle “α” are displayed in the meas-
ured-value lines a.
Pay attention that the reference plane of the measurement 
(e.g. the rear edge of the measuring tool) remains exactly at 
the same location for all individual measurements within a 
measuring sequence.
c) Indirect length measurement (see figure E)
Press the function-mode button 8 until the indication for indi-
rect length measurement   appears on the display.
Pay attention that the measuring tool is positioned at the 
same height as the sought measuring point. Now, tilt the measuring tool around the reference plane and measure dis-
tance “1” as for a length measurement.
Upon completion of the measurement, 
the result for the sought distance 
“X” is 
displayed in the result line c. The measur-
ing values for the distance “1” and the an-
gle “α” are displayed in the measured-
value lines a.
Wall Surface Measurement (see figure F)
The wall surface measurement is used to determine the sum 
of several individual surfaces with a common height.
In the example shown, the total surface of several walls that 
have the same room height A, but different lengths B, are to 
be determined.
For wall surface measurements, press the function-mode but-
ton 8 until the indicator for wall surface measurement   ap-
pears on the display.
Measure the room height A as for a length measurement. The 
measured value (“cst”) is displayed in the top measured-val-
ue line a. The laser remains switched on.
Afterwards, measure length B
1 of the first 
wall. The surface is automatically calcu-
lated and displayed in the result line c. 
The length measurement value is dis-
played in the centre measured-value line 
a. The laser remains switched on.
Now, measure length B
2 of the second 
wall. The individually measured value dis-
played in the centre measured-value line 
a is added to the length B
1. The sum of 
both lengths (“sum”, displayed in the 
bottom measured-value line a) is multi-
plied with the stored height A. The total 
surface value is displayed in the result line c.
In this manner, you can measure any number of further 
lengths B
X, which are automatically added and multiplied with 
height A.
The condition for a correct area/surface calculation is that the 
first measured length (in the example the room height A) is 
identical for all partial surfaces.
Grade Measurement (see figure G)
After pressing the grade measurement button 3, the indica-
tion for grade measurement appears on the display . The 
backside of the measuring tool is used as the reference plane. 
By pressing the grade measurement button 3 again, the side 
surfaces of the measuring tool are used as reference plane 
and the display view is shown turned by 90°.
Press the measuring button 2 to lock the measuring value and 
accept it in the measured values memory. Pressing the meas-
uring button 2 again continues the measurement.
When the indication flashes during the measuring procedure, 
then the measuring tool was tilted too much in lateral direc-
tion.
1
1
2
1
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If the “digital vial” function is activated in the basic settings, 
the grade value is also displayed in the other measuring func-
tions in line d of display 1.
Timer Function
The timer function is helpful, when, for example, movements 
of the measuring tool during measuring are to be prevented.
To activate the timer function, press and hold button 6 until 
the   indicator appears in the display.
The time period from the actuation until the measurement 
takes place is displayed in the measured-value line a. The time 
period can be adjusted between 1 s and 60 s by pressing the 
plus button 11 or the minus button 5.
The measurement takes place automati-
cally after the set time period has 
elapsed.
The timer function can also be used for 
distance measurements within other 
measuring modes (e. g. area/surface 
measurement). Adding and subtracting measuring results as 
well as continuous measurements are not possible.
List of the last Measuring Values
The measuring tool stores the last 50 measuring values and 
their calculations, and displays them in reverse order (last 
measured value first).
To recall the stored measurements, press 
button 7. The result of the last measure-
ment is indicated on the display, along 
with the indicator for the measured-value 
list e and the memory location of the dis-
played measurements.
When no further measurements are stored after pressing but-
ton 7 again, the measuring tool switches back to the last 
measuring function. To exit the measured-value list, press 
one of the measuring-mode buttons.
To continuously save the currently displayed length measure-
ment value as a constant, press and hold the measured-value 
list button 7 until “CST” is indicated on the display. A meas-
ured-value list entry cannot be subsequently saved as a con-
stant.
To use a length measurement value in a measuring mode (e. g. 
area/surface measurement), press the measured-value list 
button 7, select the desired entry and confirm by pressing the 
result button 6.
Deleting Measured Values
Briefly pressing button 4 deletes the last individual measuring 
value determined in any measuring function. Briefly pressing 
the button repeatedly deletes the individual measuring values 
in reverse order.
To delete the currently displayed measured-value list entry, 
briefly press button 4. To delete the complete measured-val-
ue list and the constant “CST”, press and hold the measured-
value list button 7 and at the same time briefly press button 4.
In wall surface measurement mode, briefly pressing button 4 
the first time deletes the last individually measured value; pressing the button a second time deletes all lengths BX, and 
pressing the button a third time deletes the room height A.
Adding Measured Values
To add measured values, firstly carry out any measurement or 
select an entry from the measured-value list. Then press the 
plus button 11. For confirmation, “+” appears on the display. 
Then carry out a second measurement or select another entry 
from the measured-value list.
To call up the sum of both measurements, 
press the result button 6. The calculation 
is indicated in the measured-value lines a, 
and the sum in the result line c.
After calculation of the sum, further 
measured values or measured-value list 
entries can be added to this result when 
pressing the plus button 11 prior to each measurement. 
Pressing the result button 6 ends the addition.
Notes on the addition:
– Mixed length, area and volume values cannot be added to-
gether. For example, when a length and area value are add-
ed, “ERROR” briefly appears on the display after pressing 
the result button 6. Afterwards, the measuring tool switch-
es back to the last active measuring mode.
– For each calculation, the result of one measurement is 
added (e. g. the volume value); for continuous measure-
ments, this would be the displayed measured value in re-
sult line c. The addition of individual measured values from 
the measured-value lines a is not possible.
Subtracting Measured Values
To subtract measuring values, press mi-
nus button 5; For confirmation, “– ” is in-
dicated on the display. The further proce-
dure is analog to “Adding Measured 
Values”.
Data Transmission to other Devices
The measuring tool is equipped with a Bluetooth® module, 
which enables data transmission via radio technology to cer-
tain mobile terminals/devices with a Bluetooth® interface 
(e. g., smartphones, tablets).
For information on the necessary system requirements for a 
Bluetooth® connection, please refer to the Bosch website at 
www.bosch-pt.de.
For data transmission via Bluetooth®, time delays between 
mobile terminal/device and measuring tool may occur. This 
can be possible due to the distance between both devices or 
the object being measured.
Data transmission to certain other devices with USB interface 
is possible via the measuring tool’s micro USB port (e. g. to 
computers, notebooks). In USB operation, the charging dura-
tion n can be significantly prolonged during data transmis-
sion.
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Activating the Bluetooth® Interface for Data Transmission 
to a Mobile Terminal/Device
To activate the Bluetooth® interface, press the measuring 
tool’s Bluetooth® button 13. Make sure that the Bluetooth® in-
terface on your mobile terminal/device is activated.
Special Bosch applications (apps) are available to extend the 
functional range of the mobile terminal/device and for simpli-
fication of the data processing. Depending on terminal/de-
vice, these can be downloaded at the respective app stores:
After starting the Bosch application, the connection between 
the mobile terminal/device and the measuring tool is estab-
lished. When several active measuring tools are found, select 
the appropriate measuring tool. When only one active meas-
uring tool is found, the connection is automatically estab-
lished.
Note: When establishing the connection between the meas-
uring tool and the mobile terminal/device (e. g., smartphone, 
tablet) the first time (pairing), the measuring tool's PIN code 
may be requested. In this case, enter “0000”.
The connection status and the active connection are indicat-
ed on the display 1 (l).
When a connection cannot be established within 5 minutes 
after pressing the Bluetooth® button 13, the Bluetooth® fea-
ture automatically switches off to save the batteries/re-
chargeable batteries.
When operating the measuring tool in the measuring rail 27, 
data transmission is not possible.
Deactivating the Bluetooth® Interface
To activate the Bluetooth® interface, press the Bluetooth® 
button 13 or switch the measuring tool off.
When the Bluetooth® interface is deactivated or when the 
Bluetooth® connection is interrupted (e. g., because of too 
large distance or obstructions between the measuring tool 
and the mobile terminal/device as well as electromagnetic 
disturbances), Bluetooth® (l) is no longer indicated on the 
display.
Data Transmission via USB Interface
Connect the measuring tool to your computer or notebook 
with the micro USB cable. After starting the software on your 
computer or notebook, a connection is established to the 
measuring tool.
To download the current software and for further information, 
please refer to the Bosch website at 
www.bosch-pt.de.Note: As soon as the measuring tool is connected to a com-
puter or notebook via the micro USB cable, the lithium ion 
battery is charged. The charge duration varies depending on 
the charging current.
To recharge the measuring tool as quickly as possible, use the 
provided charger, see “Battery Charging”.
Working Advice
The measuring tool is equipped with a radio interface. 
Local operating restrictions, e. g. in airplanes or hospi-
tals, are to be observed. 
General Information
The reception lens 17 and the laser beam outlet 18 must not 
be covered when taking a measurement.
The measuring tool must not be moved while taking a meas-
urement (with the exception of the continuous measurement 
and grade measurement functions). Therefore, place the 
measuring tool, as far as this is possible, against or on a firm 
stop or supporting surface.
Influence Effects on the Measuring Range
The measuring range depends upon the light conditions and 
the reflection properties of the target surface. For improved 
visibility of the laser beam when working outdoors and when 
the sunlight is intense, use the laser viewing glasses 30 (ac-
cessory) and the laser target plate 31 (accessory), or shade 
off the target surface.
Influence Effects on the Measuring Result
Due to physical effects, faulty measurements cannot be ex-
cluded when measuring on different surfaces. Included here 
are:
– Transparent surfaces (e. g., glass, water),
– Reflecting surfaces (e. g., polished metal, glass),
– Porous surfaces (e. g. insulation materials),
– Structured surfaces (e. g., roughcast, natural stone).
If required, use the laser target plate 31 (accessory) on these 
surfaces.
Furthermore, faulty measurements are also possible when 
sighting inclined target surfaces.
Also, air layers with varying temperatures or indirectly re-
ceived reflections can affect the measured value.
Accuracy Check and Calibration of the Grade Measure-
ment (see figure H)
Regularly check the accuracy of the grade measurement. This 
is done by carrying out a reversal measurement. For this, 
place the measuring tool on a table and measure the grade. 
Turn the measuring tool by 180 °  and measure the grade 
again. The difference of the indicated reading may not exceed 
by more than 0.3 °  (max.).
In case of greater deviation, the measuring tool must be recal-
ibrated. For this, press and hold the grade measurement but-
ton 3. Follow the directions on the display.
After severe temperature changes and impact, we recom-
mend an accuracy check and, if required, to recalibrate the 
measuring tool. After a temperature change, the measuring 
tool must acclimate for a while before calibrating.
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Accuracy Check of the Distance Measurement
The accuracy of the distance measurement can be checked as 
follows:
– Select a permanently unchangeable measuring section 
with a length of approx. 1 to 10 metres; its length must be 
precisely known (e. g. the width of a room or a door open-
ing). The measuring distance must be indoors; the target 
surface for the measurement must be smooth and reflect 
well.
–Measure the distance 10 times after another.
The deviation of the individual measurements from the mean 
value must not exceed  ± 2 mm (max.). Log the measure-
ments, so that you can compare their accuracy at a later point 
of time.
Working with the Tripod (Accessory)
The use of a tripod is particularly necessary for larger distanc-
es. Position the measuring tool with the 1/4" thread 19 onto 
the quick-change plate of the tripod 29 or a commercially 
available camera tripod. Tighten the measuring tool with the 
locking screw of the quick-change plate.
Set the corresponding reference level for measurement with 
a tripod by pushing button 10 (the reference level is the 
thread).
Working with the Measuring Rail (see figures I – K)
The measuring rail 27 can be used for a more accurate grade 
measurement result. Distance measurements are not possi-
ble with the measuring rail.
Place the measuring tool into the measur-
ing rail 27 as shown and lock the measur-
ing tool with locking lever 28. Press the 
measuring button 2 to activate the “Meas-
uring rail” operating mode.
Regularly check the accuracy of the grade measurement by 
carrying out a reversal measurement or with the spirit levels 
of the measuring rail.
In case of greater deviation, the measuring tool must be recal-
ibrated. For this, press and hold the grade measurement but-
ton 3. Follow the directions on the display.
When operating the measuring tool in the measuring rail 27, 
data transmission is not possible.
To end the “Measuring rail” operating mode, switch the meas-
uring tool off and remove it from the measuring rail.
Troubleshooting – Causes and Corrective 
Measures
CauseCorrective Measure
Temperature warning indicator (k) flashing; measure-
ment not possible
The measuring tool is outside the 
operating temperature range from 
– 10 ° C to + 50 ° C (in the function 
continuous measurement up to 
+40 °C).Wait until the measuring 
tool has reached the op-
erating temperature
 “ERROR” indication in the display
Addition/Subtraction of measured 
values with different units of meas-
ureOnly add/subtract 
measured values with 
the same units of meas-
ure
The angle between the laser beam 
and the target is too acute.Enlarge the angle be-
tween the laser beam 
and the target
The target surface reflects too in-
tensely (e. g. a mirror) or insuffi-
ciently (e. g. black fabric), or the 
ambient light is too bright.Work with the laser tar-
get plate 31 (accessory)
The laser beam outlet 18 or the re-
ception lens 17 are misted up 
(e. g. due to a rapid temperature 
change).Wipe the laser beam out-
let 18 and/or the recep-
tion lens 17 dry using a 
soft cloth
Calculated value is greater than 
1 999 999 or smaller than 
– 999 999 m/m
2/m3.Divide calculation into 
intermediate steps
Indication “>60 ° ” or “
						

							30 | English 
2 609 141 026 | (1.7.13)Bosch Power Tools
The measuring tool monitors the correct 
function for each measurement. When a de-
fect is determined, only the symbol shown 
aside flashes in the display. In this case, or 
when the above mentioned corrective 
measures cannot correct an error, have the 
measuring tool checked by an after-sales service agent for 
Bosch power tools.
Maintenance and Service
Maintenance and Cleaning
Store and transport the measuring tool only in the supplied 
protective pouch.
Keep the measuring tool clean at all times.
Do not immerse the measuring tool in water or other fluids.
Wipe off debris using a moist and soft cloth. Do not use any 
cleaning agents or solvents.
Maintain the reception lens 17 in particular, with the same 
care as required for eye glasses or the lens of a camera.
In case of repairs, send in the measuring tool packed in its 
protective pouch 26.
After-sales Service and Application Service
Our after-sales service responds to your questions concern-
ing maintenance and repair of your product as well as spare 
parts. Exploded views and information on spare parts can al-
so be found under:
www.bosch-pt.com Battery charge-control indicator (g) and “ERROR” indi-
cation in the display
Battery charging voltage not cor-
rectCheck if the plug-in con-
nection has been estab-
lished correctly and if 
the battery charger is 
operating properly. 
When the unit symbol is 
flashing, the battery is 
defective and must be 
replaced by a Bosch af-
ter-sales service.
Bluetooth® cannot be activated
The battery is too low. Charge the measuring 
tool's battery.
No Bluetooth® connection
Failure of the Bluetooth® connec-
tionCheck the application on 
your mobile termi-
nal/device.
Check if Bluetooth® is 
activated on your meas-
uring tool and mobile 
terminal/device.
Check your mobile ter-
minal/device for over-
load.
Reduce the distance be-
tween measuring tool 
and your mobile termi-
nal/device.
Avoid obstructions 
(e. g., reinforced con-
crete, metal doors) be-
tween measuring tool 
and your mobile termi-
nal/device. Observe 
clearance to electro-
magnetic disturbances 
(e. g., WLAN transmit-
ters).
Data transmission via USB interface not possible
Software error Make sure that the soft-
ware runs correctly on 
your computer or note-
book. For further infor-
mation, please refer to 
the Bosch website at 
www.bosch-pt.de
Micro USB cable Check the proper and 
tight seating of the micro 
USB cable.
Check the micro USB ca-
ble for damage.
CauseCorrective Measure
Battery charge-control indicator (g) or prolonged charge 
duration indication n on the display
Charge duration clearly too long, 
as charging current too low.Only use the original 
Bosch charger.
Measuring result not plausible
The target surface does not reflect 
correctly (e. g. water, glass).Cover off the target sur-
face
The laser beam outlet 18 or the re-
ception lens 17 are covered.Make sure that the laser 
beam outlet 18 or the re-
ception lens 17 are un-
obstructed
Wrong reference level set Select reference level 
that corresponds to 
measurement
Obstruction in path of laser beam Laser point must be 
completely on target 
surface.
The indication remains unchanged or the measuring tool 
reacts unexpected after pressing a button
Software error Press the measuring 
button 2 and the button 
for clearing the internal 
memory / On/Off 4 to re-
set the software.
CauseCorrective Measure
OBJ_BUCH-1956-002.book  Page 30  Monday, July 1, 2013  11:28 AM 
						

							 English | 31
Bosch Power Tools2 609 141 026 | (1.7.13)
Bosch’s application service team will gladly answer questions 
concerning our products and their accessories.
In all correspondence and spare parts orders, please always 
include the 10-digit article number given on the type plate of 
the measuring tool.
Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
Denham
Uxbridge
UB 9 5HJ
Tel. Service: (0844) 7360109
Fax: (0844) 7360146
E-Mail: [email protected]
Ireland
Origo Ltd.
Unit 23 Magna Drive
Magna Business Park
City West
Dublin 24
Tel. Service: (01) 4666700
Fax: (01) 4666888
Australia, New Zealand and Pacific Islands
Robert Bosch Australia Pty. Ltd.
Power Tools
Locked Bag 66
Clayton South VIC 3169
Customer Contact Center
Inside Australia:
Phone: (01300) 307044
Fax: (01300) 307045
Inside New Zealand:
Phone: (0800) 543353
Fax: (0800) 428570
Outside AU and NZ:
Phone: +61 3 95415555
www.bosch.com.au
Supplier code ERAC000385
Republic of South Africa
Customer service
Hotline: (011) 6519600
Gauteng – BSC Service Centre
35 Roper Street, New Centre
Johannesburg
Tel.: (011) 4939375
Fax: (011) 4930126
E-Mail: [email protected]
KZN – BSC Service Centre
Unit E, Almar Centre
143 Crompton Street
Pinetown
Tel.: (031) 7012120
Fax: (031) 7012446
E-Mail: [email protected] Cape – BSC Service Centre
Democracy Way, Prosperity Park
Milnerton
Tel.: (021) 5512577
Fax: (021) 5513223
E-Mail: [email protected]
Bosch Headquarters
Midrand, Gauteng
Tel.: (011) 6519600
Fax: (011) 6519880
E-Mail: [email protected]
Disposal
Measuring tools, accessories and packaging should be sorted 
for environmental-friendly recycling.
Do not dispose of measuring tools into household waste!
Only for EC countries:
According to the European Guideline 
2012/19/EU, measuring tools that are no 
longer usable, and according to the Europe-
an Guideline 2006/66/EC, defective or 
used battery packs/batteries, must be col-
lected separately and disposed of in an en-
vironmentally correct manner.
Battery packs/batteries no longer suitable for use can be di-
rectly returned at:
Great Britain
Robert Bosch Ltd. (B.S.C.)
P.O. Box 98
Broadwater Park
North Orbital Road
Denham
Uxbridge
UB 9 5HJ
Tel. Service: (0844) 7360109
Fax: (0844) 7360146
E-Mail: [email protected]
Battery packs/batteries:
Integrated batteries may only be removed for disposal. 
Opening the housing shell can damage or destroy the 
measuring tool.
Completely discharge the battery. Unscrew all screws from 
the housing and open the housing shell. Disconnect the bat-
tery connections and remove the battery.
Do not dispose of battery packs/bat-
teries into household waste, fire or wa-
ter. Battery packs/batteries should, if 
possible, be discharged, collected, re-
cycled or disposed of in an environ-
mental-friendly manner.
Subject to change without notice.
OBJ_BUCH-1956-002.book  Page 31  Monday, July 1, 2013  11:28 AM