Bosch GLM Professional 250 VF Manual Original página 23

OBJ_BUCH-947-007.book Page 23 Friday, July 8, 2016 10:44 AM
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 measure-
ments, press the result button 5. The
calculation is indicated in the meas-
ured-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 6 prior to each measurement. Pressing the result but-
ton 5 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 5. 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.
– 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 measurement.
The measuring tool must not be moved while taking a meas-
urement (except for continuous measurements, mini-
mum/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 (ac-
cessory) and the laser target plate 32 (accessory), or shade
off the target surface.
Bosch Power Tools
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 32 (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.
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 posi-
tioning 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 refer-
ence plane accordingly by pressing button 8 (for measure-
ments 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, espe-
cially over longer distances.
In combination with the laser beam, the spirit level 14 is not
suitable for levelling.
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 obstruct-
ed 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 distanc-
es. Position the measuring tool with the 1/4" thread 21 onto
the quick-change plate of the tripod 30 or a commercially
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1 609 92A 1YW | (8.7.16)