Bosch GLM 250 VF Prof - Инструкция по эксплуатации - Страница 31

 English | 

31

Bosch Power Tools

1 609 929 T67 | (3.7.09)

Adding Measured Values

To add measured values, firstly carry out any 
measurement or select an entry from the meas-
ured-value list. Then press the plus button 

6

. For 

confirmation, 

“+”

 appears on the display. Then 

carry out a second measurement or select an-
other entry from the measured-value list.

To call up the sum of both 
measurements, press the re-
sult button 

5

. 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 add-
ed to this result when pressing the plus button 

6

 prior to each measurement. Pressing the re-

sult button 

5

 ends the addition.

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 measur-

ing 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 “Add-
ing 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 measure-
ments and when in mark-out mode). Therefore, 
place the measuring tool, as far as this is pos-
sible, against or on a firm stop or supporting 
surface.

Influence Effects on the Measuring Range

The measuring range depends upon the light con-
ditions 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

 (acces-

sory) 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 differ-
ent 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 pos-
sible when sighting inclined target surfaces.
Also, air layers with varying temperatures or 
indirectly received reflections can affect the 
measured value.

OBJ_BUCH-947-004.book  Page 31  Friday, July 3, 2009  8:44 AM