Bosch GLM 80 шина R60 - Инструкция по эксплуатации - Страница 32

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Bosch Power Tools

The measuring tool must not be moved while 
taking a measurement (with the exception of 
the continuous measurement and grade meas-
urement functions). Therefore, place the meas-
uring 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 la-
ser beam when working outdoors and when the 
sunlight is intense, use the laser viewing glasses 

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 (accessory) and the laser target plate 

28

 (ac-

cessory), 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 

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 (acces-

sory) on these surfaces.
Furthermore, faulty measurements are also pos-
sible when sighting inclined target surfaces.
Also, air layers with varying temperatures or in-
directly received reflections can affect the 
measured value.

Accuracy Check and Calibration of the Grade 
Measurement (see figure H)

Regularly check the accuracy of the grade meas-
urement. 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 recalibrated. For this, press and hold 
the grade measurement button 

3

. Follow the di-

rections on the display.

Accuracy Check of the Distance Measurement

The accuracy of the distance measurement can 
be checked as follows:
– Select a permanently unchangeable measur-

ing 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 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.
The deviation of the individual measurements 
from the mean value must not exceed 

±

2 mm 

(max.). Log the measurements, 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 distances. Position the measuring tool 
with the 1/4" thread 

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 onto the quick-change 

plate of the tripod 

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 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 meas-
urement 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 

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 can be used for a more ac-

curate grade measurement result. Distance 
measurements are not possible with the meas-
uring rail.

Place the measuring tool into the 
measuring rail 

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 as shown and 

lock the measuring tool with 
locking lever 

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. Press the meas-

uring button 

2

 to activate the 

“Measuring rail” operating mode.

Regularly check the accuracy of the grade meas-
urement 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 recalibrated. For this, press and hold 
the grade measurement button 

3

. Follow the di-

rections on the display.
To end the “Measuring rail” operating mode, 
switch the measuring tool off and remove it 
from the measuring rail.

OBJ_BUCH-1347-001.book  Page 32  Friday, January 21, 2011  10:30 AM