Bosch GLM 150 Professional, GLM 250 VF Professional User guide [ml]

OBJ_BUCH-1044-001.book Page 1 Tuesday, October 13, 2009 9:53 AM

Robert Bosch GmbH

Power Tools Division
70745 Leinfelden-Echterdingen
Germany

www.bosch-pt.com

1 609 929 T68 (2009.10) T / 64 XXX

GLM Professional

150 | 250 VF

en Original instructions
fr Notice originale
th

หนังสือคู่มือการใช้งานฉบับต้นแบบ

id Petunjuk-Petunjuk untuk Penggunaan Orisinal

OBJ_BUCH-1044-001.book Page 2 Tuesday, October 13, 2009 9:49 AM

2 |

English . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

Français . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22

ภาษาไทย . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . หน้า 37

Bahasa Indonesia . . . . . . . . . . . . . . . . . . Halaman 50

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3 |

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1 609 929 T68 | (13.10.09) Bosch Power Tools

1.6 ft

1.6 ft

1.6 ft

1.6 ft

1.6 ft

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4 |

BA

1.6 ft

1.6 ft

1.6 ft

DC

1.6 ft

FE

min

1.6 ft

1 609 929 T68 | (13.10.09) Bosch Power Tools

1

E

3

2

90˚

90˚

1

3

2

1

E

3

2

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1

3

2

1

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OBJ_BUCH-1044-001.book Page 5 Tuesday, October 13, 2009 9:49 AM

5 |

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1 609 929 T68 | (13.10.09) Bosch Power Tools

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OBJ_BUCH-1044-001.book Page 6 Tuesday, October 13, 2009 9:49 AM

6 |

M

2.0 ft

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BS 150

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English | 7

en

Safety Notes

Working safely with the measuring
tool is possible only when the
operating and safety information
are read completely and the in-

structions contained therein are
strictly followed. Never make warning labels
on the measuring tool unrecognisable.
SAVE THESE INSTRUCTIONS.

f Caution – The use of other operating or ad-

justing equipment or the application of other
processing methods than those mentioned
here, can lead to dangerous radiation expo­sure.

f The measuring tool is delivered with a warn-

ing label in German language (marked with
the number 19 in the representation of the
measuring tool on the graphic page).

f Before putting into operation for the first

time, attach the supplied sticker in your na­tional language over the German text on the
warning label.

f Do not direct the laser beam at persons or

animals and do not stare into the laser
beam yourself. This measuring tool produc-

es laser class 2 laser radiation according to
IEC 60825-1. This can lead to persons being
blinded.

f Do not use the laser viewing glasses as

safety goggles. The laser viewing glasses are

used for improved visualisation of the laser
beam, but they do not protect against laser
radiation.

f Do not use the laser viewing glasses as sun

glasses or in traffic. The laser viewing glasses

do not afford complete UV protection and re­duce colour perception.

f Have the measuring tool repaired only

through qualified specialists using original
spare parts. This ensures that the safety of

the measuring tool is maintained.

f Do not allow children to use the laser meas-

uring tool without supervision. They could

unintentionally blind other persons or them­selves.

f Do not operate the measuring tool in explo-

sive environments, such as in the presence
of flammable liquids, gases or dusts. Sparks

can be created in the measuring tool which
may ignite the dust or fumes.

Functional Description

Please unfold the fold-out page with the repre­sentation of the measuring tool and leave it un­folded while reading the operating instructions.

Intended Use

The measuring tool is intended for measuring
distances, lengths, heights, clearances, and for
the calculation of areas and volumes. The meas­uring tool is suitable for measuring indoors and
outdoors.

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8 | English

Technical Data

Digital Laser Rangefinder GLM 150

Professional

Article number

3 601 K72 070 3 601 K72 170

GLM 250 VF

Professional

Optical sight
(magnification 1.6-fold)

Measuring range

Measuring accuracy
(typically)

A)

B)

Lowest indication unit

Operating temperature

0.05– 150 m (0.16 –492 ft) 0.05– 250 m (0.16 –820 ft)

±1.0 mm (± 1/32 in) ±1.0 mm (± 1/32 in)

1/32 in; 0.001 ft; 0.1 mm 1/32 in; 0.001 ft; 0.1 mm

–10°C...+50°C

– z

C)

–10°C...+50°C

Storage temperature –20 °C ... +70 ° C –20 °C ... +70 ° C

Relative air humidity, max.

Laser class

Laser type

635 nm, <1 mW 635 nm, <1 mW

90 % 90 %

22

Laser beam diameter
(at 25 ° C), approx.
– at 10 m (33 ft) distance
– at 150 m (492 ft) distance

Batteries
Rechargeable batteries

Battery live, approximately
– Individual measurements
– Continuous measurement

6 mm (1/4 in)

90 mm (3 1/2 in)

4x1.5VLR03(AAA)

4x1.2VHR03(AAA)

D)

30000

D)

5h

6 mm (1/4 in)

90 mm (3 1/2 in)

4x1.5VLR03(AAA)

4x1.2VHR03(AAA)

30000

5h

Weight according to
EPTA-Procedure 01/2003

Dimensions

(2 19/32 x 4 23/32 x 1 15/32 in)

Degree of protection

splash water protected)

A) The working range increases depending on how well the laser light is reflected from the surface of the target (scat­tered, not reflective) and with increased brightness of the laser point to the ambient light intensity (interior spaces,
twilight). In unfavourable conditions (e.g. when measuring outdoors at intense sunlight), it may be necessary to use
the target plate.

B) In unfavourable conditions (e. g. at intense sunlight or an insufficiently reflecting surface), the maximum deviation

±20 mm per 150 m (± 0.8 in per 492 ft). In favourable conditions, a deviation influence of ± 0.05 mm/m

is

±0.0006 in/ft) must be taken into account.

(

C) In the continuous measurement function, the maximum operating temperature is +40 ° C.

D) Less measurements are possible when using 1.2 V rechargeable batteries than with 1.5 V batteries. The battery
life listed refers to measurements without display illumination and audio signal.

Please observe the article number on the type plate of your measuring tool. The trade names of the individual meas­uring tools may vary.

The measuring tool can be clearly identified with the serial number 20 on the type plate.

0.24 kg (8.5 oz) 0.24 kg (8.5 oz)

66 x 120 x 37 mm

66 x 120 x 37 mm

(2 19/32 x 4 23/32 x 1 15/32 in)

IP 54 (dust and

IP 54 (dust and

splash water protected)

C)

D)

D)

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English | 9

Product Features

The numbering of the product features shown
refers to the illustration of the measuring tool
on the graphic page.

1 Latch of the positioning pin

2 Button for continuous laser beam

3 Function-mode button

4 Button for length, area and volume

measurement

5 Result button

6 Plus button

7 Button for measuring and continuous

measuring

8 Button for selection of the reference level

9 Display

10 View finder of the optical sight

(GLM 250 VF)

11 Display-illumination button

12 Minus button

13 Button for minimum and maximum

measurement

14 Spirit level

15 Button for measured-value list

16 On/Off and memory delete button

17 Fixture for carrying strap

18 Positioning pin

19 Laser warning label

20 Serial number

21 1/4" thread

22 Battery compartment

23 Locking knob of the battery compartment

24 Alignment aid

25 Optical sight window (GLM 250 VF)

26 Reception lens

27 Laser beam outlet

28 Protective pouch

29 Carrying strap

30 Tripod*

31 Laser viewing glasses*

32 Laser target plate*

* The accessories illustrated or described are not
included as standard delivery.

Display Elements

a Measured-value lines

b “ERROR” indication

c Result line

d Measured-value list indicator

e Measuring modes

Length measurement
Area/surface measurement
Volume measurement
Continuous measurement

min
max Minimum/maximum measurement

2

1

Simple Pythagoras measurement

1

Double Pythagoras measurement

32

3

2

Combined Pythagoras measurement

1

2

Trapezium measurement

1

Timer function
Wall-surface measurement
Mark-out mode

f Battery low indicator

g Measurement reference level

h Laser switched on

i Temperature warning

Assembly

Inserting/Replacing the Battery

Using alkali-manganese or rechargeable batter­ies is recommended for operation of the meas­uring tool.

Fewer measurements are possible when using

1.2 V rechargeable batteries as compared with

1.5 V batteries.

To open the battery compartment 22, turn the
locking knob 23 to position and pull out the
battery compartment.

When inserting the batteries/rechargeable bat­teries, pay attention to the correct polarity ac­cording to the representation on the inside of
the battery compartment.

When the battery symbol appears for the first
time on the display, at least 100 individual
measurements are still possible. The continuous
measurement mode is deactivated.

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10 | English

When the battery symbol flashes, the batter­ies/rechargeable batteries must be replaced.
Measurements are no longer possible.

Replace all batteries/rechargeable batteries at
the same time. Do not use different brands or
types of batteries/rechargeable batteries to­gether.

f Remove the batteries/rechargeable batter-

ies from the measuring tool when not using
it for longer periods. When storing for longer

periods, the batteries/rechargeable batteries
can corrode and discharge themselves.

Operation

Initial Operation

f Protect the measuring tool against mois-

ture and direct sun light.

f Do not subject the measuring tool to ex-

treme temperatures or variations in tem­perature. As an example, do not leave it in

vehicles for longer periods. In case of large
variations 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 tempera­ture, the accuracy of the measuring tool can
be impaired.

f 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 “Accuracy
Check of the Measuring Tool”, page 19) each
time before continuing to work.

Switching On and Off

For switching on the measuring tool, the follow­ing possibilities are given:

– Pressing the On/Off button 16: The measur-

ing tool is switched on and is in length meas­urement mode. The laser is not activated.

– Briefly pressing the measuring button 7:

Measuring tool and laser are switched on.
The measuring tool is in length measurement
mode.

– Pressing the measuring button 7 for several

seconds: Measuring tool and laser are
switched on. The measuring tool is in contin­uous measurement mode.

f 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 16 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.

When switching off automatically, all stored
values are retained.

Measuring Procedure

After switching on, the measuring tool is always
in length measurement or continuous measure­ment mode. Other measuring modes can be
switched to by pressing the respective mode
button (see “Measuring Functions”, page 12).

After switching on, the rear edge of the measur­ing tool is preset as the reference level for the
measurement. By pressing the reference level
button 8, the reference level can be changed
(see “Selecting the Reference Level”, page 11).

Upon selection of the measuring function and
the reference level, all further steps are carried
out by pushing the measuring button 7.

With the reference level selected, place the
measuring tool against the desired measuring
line (e.g. a wall).

Briefly press the measuring button 7 to switch
on the laser beam.

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f 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 7 again to initate
the measurement.

When the laser beam is switched on permanent­ly, the measurement already starts after the first
actuation of the measuring button 7. In continu­ous measurement mode, the measurement
starts immediately upon switching on.

Typically, the measured value appears after 0.5
and latest after 4 seconds. The duration of the
measurement depends on the distance, the light
conditions and the reflection properties of the
target surface. The end of the measurement is
indicated by a signal tone. The laser beam is
switched off automatically upon completion of
the measurement.

When no measurement has taken place approx.
20 seconds after sighting, the laser beam is
switched off automatically to save the batteries.

Selecting the Reference Level
(see figures A – E)

For measuring, you can select between four
different reference planes:

– The rear edge of the measuring tool or the

front edge of the laterally folded-out posi­tioning pin 18 (e.g. when measuring onward
from outer corners),

– The tip of the folded-out positioning pin 18

(e.g. when measuring from a corner),

– The front measuring-tool edge (e. g. when

measuring onward from a table edge),

–The thread 21 (e. g. for tripod measure-

ments).

To select the reference level, press button 8 un­til the requested 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
measurements that have already been carried
out (e.g. when indicating measuring values in
the measured-value list) is not possible.

Continuous Laser Beam

If required, the measuring tool can also be
switched to the continuous laser beam mode.
For this, push the button for continuous laser
beam 2. “LASER” lights up continuously in the
display.

f 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 between measurements; for meas­uring, it is only required to press the measuring
button 7 once.

To switch off the continuous laser beam, press
button 2 again or switch the measuring tool off.

Switching off the continuous laser beam during
a measurement automatically ends the measure­ment.

Display Illumination

The display illumination is switched on and off
by pressing button 11. When no button is
pressed 10 s after switching on the display illu­mination, it is switched off to save the batteries.

Audio Signal

To switch the audio signal on
and off, press the function­mode button 3 until the “au­dio-signal adjustment” indica­tion appears on the display.
Select the required setting by
pressing the plus button 6 or
the minus button 12.

The selected audio-signal adjustment is retained
when switching the measuring tool off and on.

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12 | English

Changing the Unit of Measure

For indication of the measured values, the unit
of measure can be changed at any time.

The following units of measure are possible:
– Length measurement: m, cm, mm, ft, ft 1/32,

in, in 1/32, yd,
– Area/surface measurement: m
– Volume measurement: m

3

, ft3.

2

, ft2,

To to change the unit of meas­ure, press the function-mode
button 3 until the “change
unit of measure” indication
appears on the display. Select
the required unit of measure
by pressing the plus button 6
or the minus button 12.

The unit-of-measure setting is retained when
switching the measuring tool on or off.

Measuring Functions

Simple Length Measurement

For length measurements, press button 4 until
the “length measurement” indication appears
on the display.

Press the measuring button 7
once for sighting and once
more to take the measure­ment.

The measured value is dis­played in the result line c.

For several subsequent length measurements,
the last measured results are displayed in the
measured-value lines a.

Continuous Measurement (Tracking)

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 example, you
can move a certain distance away from a wall,
while the actual distance can always be read.

For continuous measurements, firstly select the
length measuring mode and then press the
measuring button 7 until the “indicator for con­tinuous measurement” appears on the dis­play. The laser is switched on and the measure­ment starts immediately.

The current measured value is
displayed in the result line c.

Briefly pressing the measur­ing button 7 ends the contin­uous measurement. The last
measured value is displayed

in the result line c. Pressing
the measuring button 7 for several seconds re­starts a continuous measuring run.

Continuous measurement automatically switch­es off after 5 min. The last measured value re­mains indicated in the result line c.

Minimum/Maximum Measurement
(see figure F– G)

The minimum measurement is used to deter­mine the shortest distance from a fixed refer­ence point. It is used, as an example, 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 example, for deter­mining diagonals.

For simple minimum/maximum measurement,
firstly select “length measurement mode” and
then press button 13 “min” is displayed in result
line c for minimum measurement. For maximum
measurements, press button 13 again, so that
“max” is displayed in the result line. Then press
the measuring button 7. The laser is switched on
and the measurement starts.

Move the laser back and forth over the request­ed target (e.g., the room corner for determining
the diagonal) in such a manner that the refer­ence point of the measurement (e.g., the tip of
the positioning pin 18) always remains at the
same location.

Depending on the set mode,

the minimum or maximum

value is displayed in the re-

sult line c. It is always over-

written, when the current

length measurement value is

less than the present minimal
or larger than the present maximal value. The
maximal (“max”), the minimal (“min”) and the
current measuring value are displayed in the
measured-value lines a.

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English | 13

To end the minimum/maximum measurement,
briefly press the measuring button 7. Pressing
the measuring button again starts a new meas­urement.

The minimum/maximum measurement can also
be used for length measurements within other
measuring modes (e.g. area/surface measure­ment). For this, press button 13 once for mini­mal measurement and twice for maximal meas­urement each time when determining individual
measured values. Then press the measuring but­ton 7 to switch the laser beam on. Move the
measuring tool in such a manner that the de­sired minimum or maximum value is measured,
and press the measuring button 7 to take over
the minimum or maximum value into the current
calculation.

For time-delayed length measurements and
when in mark-out mode, minimum/maximum
measurements are not possible.

The minimum/maximum measurement automat­ically switches off after 5 min.

Area Measurement

For area/surface measurements, press button 4
until the indicator for area measurement ap­pears on the display.

Afterwards, measure the length and the width,
one after another, in the same manner as a
length measurement. The laser beam remains
switched on between both measurements.

Upon completion of the sec­ond measurement, the sur­face is automatically calculat­ed and displayed in the result
line c. The individual meas­ured values are displayed in
the measured-value lines a.

Volume Measurement

For volume measurements, press button 4 until
the indicator for volume measurement ap­pears on the display.

Afterwards, measure the length, width and the
height, one after another, in the same manner as
for a length measurement. The laser beam re­mains switched on between all three measure­ments.

Upon completion of the third

measurement, the volume is

automatically calculated and

displayed in the result line c.

The individual measured val-

ues are displayed in the

measured-value lines a.

3

Values above 999999 m

/ft3 cannot be indi­cated; “ERROR” and “––––” appear on the dis-
play. Divide the volume to be measured into in­dividual measurements; their values can then be
calculated separately and then summarized.

Indirect Length Measurement
(see figures H– K)

The indirect length measurement is used to
measure distances that cannot be measured di­rectly because an obstacle would obstruct the
laser beam or no target surface is available as a
reflector. Correct results are achieved only when
the right angles required for the respective meas­urement are exactly adhered to (Pythagorean
Theorem).

Pay attention that the reference point 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 (exception: trapezium measure­ments).

The laser beam remains switched on between
the individual measurements.

For indirect length measurements, four measur­ing modes are available. Each measuring mode
can be used for determining different distances.
To select the measuring mode, press the func­tion-mode button 3 until the symbol of the de­sired measuring mode is indicated on the display.

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14 | English

a) Simple Pythagoras Measurement

(see figure H)

Press the function-mode button 3 until the indi­cation for simple Pythagoras measurement

2

1

appears on the display.
Measure distances “1” and “2” in this sequence

with a length measurement. Pay attention that a
right angle exists between distance “1” and the
sought distance “E”.

Upon completion of the last
measurement, the result for
the sought distance “E” is
displayed in the result line c.
The individual measured val­ues are displayed in the
measured-value lines a.

b) Double Pythagoras Measurement

(see figure I)

Press the function-mode button 3 until the indi­cation for double Pythagoras measurement

1

appears on the display.
Measure distances “1”, “2” and “3” in this se-

quence with a length measurement. Pay atten­tion that a right angle exists between distance
“1” and the sought distance “E”.

Upon completion of the last
measurement, the result for
the sought distance “E” is
displayed in the result line c.
The individual measured val­ues are displayed in the
measured-value lines a.

c) Combined Pythagoras Measurement

(see figure J)

Press the function-mode button 3 until the indi­cation for combined Pythagoras measurement

3

2

appears on the display.

1

Measure distances “1”, “2” and “3” in this se­quence with a length measurement. Pay atten­tion that a right angle exists between distance
“1” and the sought distance “E”.

Upon completion of the last
measurement, the result for
the sought distance “E” is
displayed in the result line c.
The individual measured
values are displayed in the
measured-value lines a.

d) Trapezium Measurement (see figure K)

Press the function-mode button 3 until the indi­cation for trapezium measurement appears
on the display.

Measure distances “1”, “2” and “3” in this se­quence with a length measurement. Pay atten­tion that the measurement of distance “3”
starts exactly at the end point of distance “1”
and that a right angle exists between distances
“1” and “2” as well as between “1” and “3”.

Upon completion of the last
measurement, the result for
the sought distance “E” is
displayed in the result line c.
The individual measured val­ues are displayed in the
measured-value lines a.

Time-delayed Length Measurement

Time-delayed length measurement is helpful

32

e.g. when measuring at hard to reach locations
or when movements of the measuring tool dur­ing measuring are to be prevented.

For a time-delayed length measurement, press
function-mode button 3 until the indicator for
time-delayed length measurement appears on
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 6 or the minus button 12.

Then press the measuring
button 7 to switch the laser
beam on and aim at the tar­get point. Press the measur­ing button 7 again to actuate
the measurement. The meas-

urement takes place after the
set time period. The measured value is dis­played in the result line c.

The addition and subtraction of measuring re­sults as well as minimum/maximum measure­ments are not possible for time-delayed length
measurements.

2

1

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English | 15

Wall Surface Measurement (see figure L)

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 button 3 until the indicator for wall
surface measurement appears on the display.

Measure the room height A as for a length meas­urement. The measured value (“cst”) is dis-
played in the top measured-value line a. The la­ser remains switched on.

Afterwards, measure length

of the first wall. The surface

B

1

is automatically calculated
and displayed in the result line
c. The length measurement
value is displayed 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 dis­played in the centre meas­ured-value line a is added to
the length B

. The sum of

1

both lengths (“sum”, dis-

played in the bottom measured-value line a) is
multiplied 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

, which are automatically add-

X

ed 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.

For a new wall surface measurement with new
room height A, press button 16 three times.

Mark-out Mode (see figure M)

Mark-out mode is used for marking off a fixed
length (mark-out value), which can either be
measured or entered. It is helpful for, e.g., mark­ing partition spaces for drywalls.

To activate the mark-out mode, press the func­tion-mode button 3 until the mark-out mode in­dication appears on the display.

The mark-out value can be adjusted as follows:
– To enter a known value, press the plus but-

ton 6 or the minus button 12 until the desired
value is displayed in the upper measured-val­ue line a. When pressing and holding the plus
button 6 or minus button 12, the values will
continuously skip through. The laser is not
activated yet.

– For measuring the mark-out value, briefly

press the measuring button 7 once for sight­ing and once more for measuring. After­wards, the laser beam remains switched on.

– The measured or entered mark-out value can

be corrected by pressing the plus button 6 or
the minus button 12.

After determining the mark-out value, press and
hold the measuring button 7 to begin the meas­urement.

Now, move the measuring tool in the desired di­rection for marking out. The current measuring
value of the complete measured distance is con­tinuously displayed in the result line c. The se­lected mark-out value continues to be displayed
in the upper measured-value line a.

The factor (“x”) how often the mark-out value is
contained in the total measuring distance is dis­played in the centre measured-value line, and the
difference (“dif”) between an integral multiple of
the mark-out value and the total distance is dis­played in the bottom measured-value line a.

When the total measuring distance is somewhat
less than an integral multiple, then a negative
difference and the next higher multiple of the
mark-out value are displayed.

Move the measuring tool until the desired multi­ple of the mark-out value is displayed in the cen­tre measured-value line a and the difference in
the bottom measured-value line is a “0.0”. Then
mark off the reference point of the measurement.

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Examples:
a) Positive difference:

24.3 ft = (12 x 2.0 ft) + 0.3 ft

The mark-out value 2,0 ft is
contained 12 times in a total
distance of 24,3 ft. Addition­ally, the total distance con­tains a rest of 0,3 ft. Reduce
the distance between the
measuring tool and the start­ing point by 0,3 ft difference,
and then mark off the length.

b) Negative difference:

23.7 ft = (12 x 2.0 ft) – 0.3 ft

For a total distance of 23,7 ft,
0,3 ft are missing for the
mark-out value 2,0 ft to be
contained 12 times. Increase
the distance between the
measuring tool and the start­ing point by 0,3 ft difference,
and then mark off the length.

Briefly pressing measuring button 7 ends the
mark-out mode. Pressing and holding the meas­uring button 7 restarts the mark-out mode anew
(with the same mark-out value).

The mark-out mode automatically switches off
after 5 min. For prior exiting of the function,
press one of the measuring-mode buttons.

List of the last Measuring Values

The measuring tool stores the last 30 measuring
values and their calculations, and displays them
in reverse order (last measured value first).

To recall the stored measure­ments, press button 15. The
result of the last measure­ment is indicated on the dis­play, along with the indicator
for the measured-value list d
as well as a counter for the
numbering of the displayed
measurements.

When no further measurements are stored after
pressing button 15 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 delete the currently displayed measured-val­ue list entry, briefly press button 16. To delete
the complete measured-value list, press and
hold the button for the measured-value list 15
and at the same time briefly press button 16.

Deleting Measured Values

Briefly pressing button 16 deletes the last indi-
vidual measuring value determined in all meas­uring functions. Briefly pressing the button re­peatedly deletes the individual measured values
in reverse order.

In wall surface measurement mode, briefly
pressing button 16 the first time deletes the last
individually measured value; pressing the button
a second time deletes all lengths B

, and press-

X

ing the button a third time deletes all room
heights 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 6. 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 5. The calculation
is indicated in the measured­value 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
6 prior to each measurement. Pressing the re­sult button 5 ends the addition.

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Notes on the addition:

– Mixed length, area and volume values cannot

be added together. For example, when a
length and area value are added, “ERROR”
briefly appears on the display after pressing
the result button 5. Afterwards, the measur­ing tool switches back to the last active
measuring mode.

– For each calculation, the result of one meas-

urement is added (e.g. the volume value); for
continuous measurements, this would be the
displayed measured value in result line c. The
addition of individual measured values from
the measured-value lines a is not possible.

– For time-delayed length measurements and

when in mark-out mode, additions are not
possible; when changing to these modes, be­gun additions are interrupted.

Subtracting Measured Values

To subtract measuring val­ues, press minus button 12;
For confirmation, “–” is indi­cated on the display. The fur­ther procedure is analog to
“Adding Measured Values”.

Working Advice

General Information

The reception lens 26 and the laser beam outlet
27 must not be covered when taking a measure-

ment.

The measuring tool must not be moved while tak­ing a measurement (except for continuous meas­urements, minimum/maximum measurements
and when in mark-out mode). 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 31 (accessory) and the laser target plate

32 (accessory), or shade off the target surface.

Influence Effects on the Measuring Result

Due to physical effects, faulty measurements
cannot be excluded 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 32 (acces-
sory) on these surfaces.

Furthermore, faulty measurements are also pos­sible when sighting inclined target surfaces.

Also, air layers with varying temperatures or
indirectly received reflections can affect the
measured value.

Measuring with the Positioning Pin
(see figures B, C, F and G)

The positioning pin 18 is suitable for measuring
out of corners (diagonal within a space) or from
hard to reach areas, such as from roller-shutter
rails.

Press on the positioning pin latch 1 to fold it in
or out, or change its position.

For measurements starting from outer corners,
fold the positioning pin aside; for measure­ments from the rear edge of the positioning pin
on, fold it out to the rear.

For measurements with the positioning pin, ad­just the reference plane accordingly by pressing
button 8 (for measurements with the position­ing pin aside, set to measuring from the rear
edge of the measuring tool).

Aligning with the Spirit Level

The spirit level 14 allows for simple levelling of
the measuring tool. This allows for easier sight­ing of target surfaces, especially over longer dis­tances.

In combination with the laser beam, the spirit
level 14 is not suitable for levelling.

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18 | English

Sighting with the Optical Sight (GLM 250 VF)
(see figure N)

The sighting line through the optical sight and
the laser beam run parallel to each other. This
allows for precise sighting over long distances,
when the laser dot is no longer visible with the
naked eye.

For sighting, view through the viewfinder of the
optical sight 10. Take care that the optical sight
window 25 is not obstructed and clean.

Note: For close vicinities, the actual and the dis­played target point are not identical.

Sighting with the Alingment Aid (see figure O)

The alignment aid 24 supports sighting over
larger distances. For this, view alongside the
alignment aid on the side of the measuring tool.
The laser beam runs parallel to this sighting line.

Working with the Tripod (Accessory)

The use of a tripod is particularly necessary for
larger distances. Position the measuring tool
with the 1/4" thread 21 onto the quick-change
plate of the tripod 30 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 8 (the
reference level is the thread).

Troubleshooting – Causes and
Corrective Measures

Cause Corrective

Temperature warning indicator (i) flashing;
measurement 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).

Battery low indicator (f) appears

Battery voltage decreas­ing (measurement still
possible)

Battery low indicator (f) flashing; measure­ment not possible

Battery voltage too low Replace batteries/

The indications “ERROR” and “–– – ––” are
indicated in the display

The angle between the
laser beam and the target
is too acute.

The target surface reflects
too intensely (e.g. a mir­ror) or insufficiently (e.g.
black fabric), or the ambi­ent light is too bright.

The laser beam outlet 27
or the reception lens 26
are misted up (e.g. due to
a rapid temperature
change).

Calculated value is great­er than 999999 m/m

2

/ft3/yd.

ft/ft

Measure

Wait until the
measuring tool
has reached the
operating temper­ature

Replace batteries/
rechargeable bat­teries

rechargeable bat­teries

Enlargen the angle
between the laser
beam and the tar­get

Work with the
laser target plate
32 (accessory)

Wipe the laser
beam outlet 27
and/or the recep­tion lens 26 dry
using a soft cloth

Divide calculation

2/m3

into intermediate

/

steps

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Cause Corrective

Measure

The indication “ERROR” flashes at the top in
the display

Addition/Subtraction of
measured values with dif­ferent units of measure

Measuring result not plausible

The target surface does
not reflect correctly
(e.g. water, glass).

The laser beam outlet 27
or the reception lens 26
are covered.

Wrong reference level set Select reference

Obstruction in path of
laser beam

The measuring tool monitors the
correct function for each meas­urement. When a defect 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.

Accuracy Check of the Measuring Tool

The accuracy of the measuring tool can be
checked as follows:

– Select a permanently unchangeable measur-

ing section with a length of approx. 1 to
10 metres (3 to 30 feet); its length must be
precisely known (e.g. the width of a room or a
door opening). 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.

Only add/subtract
measured values
with the same
units of measure

Cover off the
target surface

Make sure that the
laser beam outlet
27 or the recep­tion lens 26 are
unobstructed

level that corre­sponds to meas­urement

Laser point must
be completely on
target surface.

The deviation of the individual measurements
from the mean value must not exceed ±1.5 mm
(±1/16 in) (max.). Log the measurements, so
that you can compare their accuracy at a later
point of time.

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 26 in particular,
with the same care as required for eye glasses
or the lens of a camera.

If the measuring tool should fail despite the care
taken in manufacturing and testing procedures,
repair should be carried out by an authorised af­ter-sales service centre for Bosch power tools.
Do not open the measuring tool yourself.

In all correspondence and spare parts orders,
please always include the 10-digit article
number given on the type plate of the measuring
tool.

In case of repairs, send in the measuring tool
packed in its protective pouch 28.

After-sales Service and Customer
Assistance

Our after-sales service responds to your ques­tions concerning maintenance and repair of your
product as well as spare parts. Exploded views
and information on spare parts can also be
found under:

www.bosch-pt.com

Our customer service representatives can an­swer your questions concerning possible appli­cations and adjustment of products and acces­sories.

Bosch Power Tools 1 609 929 T68 | (13.10.09)